WO2011038582A1

WO2011038582A1 - Method and system for transmitting dynamic scheduling information

Info

Publication number: WO2011038582A1
Application number: PCT/CN2010/070421
Authority: WO
Inventors: 胡剑; 胡臻平; 高有军; 马志锋; 马子江
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-09-29
Filing date: 2010-01-29
Publication date: 2011-04-07
Also published as: CN102035806B; CN102035806A

Abstract

A method for transmitting Dynamic Scheduling Information (DSI) is provided in the present invention. The method includes: a device in the network side sends a DSI of a primary Multicast Channel (MCH) on the MCH which carries a Multicast Control Channel (MCCH), and sends DSIs of other MCHs on the corresponding MCHs respectively, wherein the same Modulation Coding Scheme (MCS) is applied to all the DSIs of other MCHs; a User Equipment (UE) receives the DSI of the primary MCH on the primary MCH, and receives the DSIs of other MCHs on other MCHs respectively, wherein the user equipment will decode the DSIs of the other MCHs according to the same MCS. A system for transmitting DSI and devices which support the system are also provided in the present invention. By applying the technical solution in the present invention, a receiving terminal can obtain the scheduling information of multiple Multimedia Broadcast Multicast Services (MBMSs) for one time, thereby avoiding the UE to read the separate scheduling information time after time, saving the power of the UE, enhancing the receiving efficiency, and having better efficiency for transmitting radio interface signalings.

Description

Method and system for transmitting dynamic scheduling information

Technical field

The present invention relates to an LTE (Long Term Evolution) system, and in particular, to a method and system for transmitting dynamic scheduling information of a Multimedia Broadcast Multicast Service (MBMS). Background technique

With the rapid development of the Internet and the popularity of large-screen multi-function mobile phones, a large number of mobile data multimedia services and various high-bandwidth multimedia services have emerged, such as video conferencing, television broadcasting, video on demand, advertising, online education, and interaction. Games, etc., this aspect meets the rising business needs of mobile users, and also brings new business growth points to mobile operators. These mobile data multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.

In order to effectively utilize mobile network resources, 3rd Generation Partnership Project (3rd Generation)

The Partnership Project (3GPP) proposes the MBMS service, which is a technology for transmitting data from one data source to multiple targets, realizing the sharing of resources (including core network and access network) and improving network resources. Utilization of (especially air interface resources). MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile The trend of data development provides a better business prospect for the development of 3G.

In LTE, the MBMS service can adopt the multicast mode, which is called the MBSFN (Multicast/Broadcast over Single Frequency Network) transmission mode, and the MBMS service transmitted in the multicast mode, also called MBSFN. For a service, the same modulated post-coding format can be used in multiple cells, and the same physical resource is used to transmit the same content. The characteristics of the MBMS cell transmission are as follows:

1) synchronous transmission in the MBSFN area; 2) support multi-cell MBMS transmission and combining; 3) MTCH (Multicast Traffic Channel) and MCCH (Multicast) Control Channel, multicast control channel) is mapped to MCH (Multicast Channel) in -Tm (oint to multipoint) mode; 4) MBSFN synchronization area, MBSFN area, MBSFN transmission, advertisement, The reserved cells are semi-statically configured by operation and maintenance.

In this way, the UE (User equipment) of the multiple cells can receive multiple MBMS data with the same content and perform SFN (Single Frequent Network) merging, thereby improving the gain of the received signal. A plurality of cells that use the same physical resource and transmit the same MBMS service in the MBSFN transmission mode constitute an MBSFN area.

In an actual LTE network, there are several MBSFN services in an MBSFN area. All MBSFN services belonging to the same MBSFN area are called an MBSFN service group, that is, an MBSFN service group belongs to only one MBSFN area. An MBSFN area includes multiple cells, and each cell is configured with an identical MBSFN service group. The data channel MTCH of multiple MBSFN services having the same MBSFN area, and the control channel of the MBSFN service MCCH can be multiplexed into one MCH (Multicast Chnanel). The MCCH and multiple MTCHs of the same MBSFN area, that is, multiple logical channels can be mapped to the same transmission channel MCH.

In the LTE system, the MCH is a transport channel, which is characterized by point-to-multipoint transmission. The corresponding physical resource is a multicast resource allocated by the system for transmitting the MBMS service (MTCH), and one MCH is carried on some multicast resources. These multicast resources include several MBSFN frames and MBSFN

MBSFN frame (non-MBSFN frame), U indicates MBSFN frame (MBSFN frame), indicates non-MBSFN subframe (non-MBSFN subframe), □ indicates MBSFN subframe (MBSFN subframe), and δ indicates that it is not used. These multicast resources are configured by using a set of MSAP (MBSFN subframe allocation pattern), including a radio frame allocation mode and a radio subframe allocation mode, and the multicast resources of each MBSFN area can be in units of subframes. Divided into groups according to a certain pattern, each group can constitute one MCH, or multiple groups form one MCH. Then the pattern used in each MCH configuration is called the MSAP of the MCH, and the MSAP describes the physical resources of an MCH channel. Each cell may have one or more MCHs, each MCH uniquely corresponding to one MSAP, and uniquely belongs to one MBSFN area, but each MBSFN area may have one or more MCHs, each MCH The configured multicast resource is configured by configuring a set of MSAPs for each MCH.

As shown in FIG. 2, in order to improve the transmission efficiency of the MTCH, multiple MTCHs carried on each MCH may adopt a dynamic scheduling method, and two or more MTCHs may be multiplexed in the same MBSFN sub-time through dynamic scheduling. The frame occupies part of the resources of the subframe, and Figure 2 (a), Figure 2 (b), and Figure 2 (c) are Scheduling Period 1 , Scheduling Period 2, Scheduling Period, respectively. Schematic diagram of resource allocation for 3 (scheduling cycle 3). In the prior art, an MSAP occasion is introduced in the MSAP concept, which indicates a scheduling period (that is, a period of a radio interface, and multiple services sequentially sequence MBSFN subframe scheduling resources included in the scheduling period. All MMSs corresponding to an MSAP in the time period of the uplink transmission include all multicast resources. Multiple MTCHs and Dynamic Scheduling Information (DSI, referred to as scheduling information) of these MTCHs can be sent in one MSAP occasion. The dynamic scheduling information refers to information about specific location information of a service in a scheduling period. The dynamic scheduling information may be sent in a scheduling period, or may be sent in one or several scheduling periods before a scheduling period. Generally, scheduling information should be indicated in the scheduling period. The service data in the scheduling period and the MCCH are sent to the UE before the transmission, and the scheduling information may be carried on a MAC (Medium Access Control) control part (MAC control element). The length of the MSAP occasion is generally fixed at 320ms. Similarly, a scheduling period is generally fixed at 320 ms, or 2 ⁿ x 320 ms (n=-3, -2, -1, 0, 1, 2, 3, 4.....N), correspondingly, The length of the MSAP occasion is 40ms, 80ms, 160ms, 320ms, 640ms, 1280ms, etc. One MSAP occasion time length, also known as the MSAP occasion period, is a scheduling period, also called a scheduling period. One MCH allocates one or more MBSFN subframes in one or more MBSFN frames through the MSAP, where the subframes transmitted in the multicast mode are referred to as MBSFN subframes, and the frames containing the MBSFN subframes are referred to as MBSFN frames. There are multiple MCHs in an MBSFN area. Each MCH has its own scheduling period. It can also be called MSAP occasion ( eriod ). The scheduling period of each MCH can be the same or not. the same.

In the prior art, as shown in FIG. 3, each MCH (shown as MCH1 in FIG. 3, MCH2 in ^, MCH3 in IDI, and MCH4 in the display) has one of them. Dynamic scheduling information DSI scheduling block (shown in Figure 3), generally The DSI is carried on the MAC SDU (Media Access Control Service Data Unit) and is configured at the forefront of its scheduled MCH. When the MCH is carried on the MCH, that is, when the DCH, MCCH, and MTCH are simultaneously carried on the MCH, The order of carrying is: DSI, MCCH and MTCH.

Each MSAP occasion configured on an MCH carries scheduling information, and carries mapping information of the MTCH to the MSAP subframe. The mapping information is determined by using an MBSFN subframe number index relationship in a scheduling period, and the UE reads The scheduling information can know which MBSFN subframes each MTCH is allocated on. The UE can read the MTCH of interest in the corresponding MBSFN subframe, and ignore the MBSFN subframe that it does not need to read, thereby improving the MBMS service receiving efficiency of the UE and saving the power consumption of the UE. The MBSFN subframe number described herein is determined such that all MBSFN subframes allocated by one MCH in one scheduling period are sequentially arranged and numbered sequentially. For example, if the total number of MBSFN subframes allocated by the MCH channel in one cycle is 100, then the subframe number is from 0 to 99, or 1 to 100, and start/end can be used to indicate the bearer on the MCH. The subframe resource occupied by each MBMS service.

In the existing LTE technology, multiple transport channels multiplex the MCH channel in the following manner: One subframe corresponds to one TTI (Transmission Time Interval), and one output data block can be sent in one TTI, corresponding to one MAC. PDU (Media Protocol Control Protocol Protocol Data Unit, MAC Protocol Data Unit). In a MAC PDU, it may include multiple MAC SDUs (MAC Service Data Units) and MAC CEs (MAC control elements), which may be from different logical channels, possible logical channels. Including MTCH, MCCH, MSCH, etc., the MAC CE can carry dynamic scheduling information. These data from different logical channels are sent together on the physical channel after being concatenated together in the MAC PDU. In order to distinguish the MAC SDUs from different logical channels, the MAC PDU carries the identification information, specifically, the identifier of the logical channel, the location information of the data block of the logical channel in the MAC PDU, etc., for the receiver to distinguish different logical channels. Data block.

In an MBSFN area (MBSFN area), there are many MBMS services, each service has a service ID (service ID), and may also have a session ID (session ID). In this MBSFN area, all MBMS services have one. Unique service ID. All the services in an MBSFN area are carried on different MCHs. Each MCH allocates a logical channel identifier (such as MTCH ID) for the services it carries, so that on each MCH, the service standard Identification and logical channel identification - corresponding. The logical channel has a value range of (0, 1, 2, ..., 31), which means that a maximum of 32 logical channels can be carried and distinguished on one MCH. Different MCHs may have the same logical channel identifier. These same logical channel identifiers correspond to different service identifiers. In other words, all services of an MBSFN area are uniquely indicated by the MCH identifier and the logical channel identifier. As shown in Figure 4.

Each DSI indicates the MBSFN subframe resource allocated by all MBMS services on one MCH, which can be indicated by the start or end subframe of each MBMS service (start/end). As shown in Figure 5. All the services are arranged in order. Since the order of all MBMS services is already configured on the MCCH message, the network side and the UE already know the order of all MBMS services on the MCH. Therefore, the DSI does not need to be used again. The display indicates the logical channel identifier of the MBMS service. You only need to configure {start/end, start/end, .... start/end } in turn. The 1, 2, ..n in the figure is actually in the DSI content. It does not exist, it is only for convenience of description.

As the area of the MBMS service is different, there may be multiple MCHs in a certain cell, which respectively carry services belonging to different MBMS service areas. In addition, an MBSFN area is different due to different QoS (Quality of Service) attributes of the service. It is also possible to configure multiple MCHs, each of which is configured with different MCS (Modulation Coding Scheme), which respectively carries MBMS services with different QoS requirements, and also includes MCCH and DSI with special QoS requirements. In the scenario where there are multiple MCHs, how to send scheduling information and select the corresponding MCS needs to be designed.

At the same time, according to the current technology, an MBSFN area has multiple MCHs, that is, multiple MCSs, and each MCH has a DSI. These DSIs are MCSs that are urgently needed to be solved. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for transmitting dynamic scheduling information, which is used to indicate UE service scheduling information in a scenario of multiple MCHs.

In order to solve the above problem, the present invention discloses a method for transmitting DSI, including: a network side device transmitting a DSI of the primary MCH on a primary MCH carrying an MCCH, The DSIs of the other MCHs are respectively transmitted on the MCHs other than the primary MCH, wherein the DSIs of the other MCHs all use the same MCS.

In the above method, the same MCS used by the DSI of the other MCH is the MCS of the MCCH, or

The same MCS used by the DSI of the other MCH is configured for the system broadcast message.

MCS.

The MCS of the DSI of the primary MCH is the MCS of the MCCH, or the MCS of the DSI of the primary MCH is the MCS configured on the system broadcast message.

The MCS of the DSI of the primary MCH is the MCS of the MCCH, which means:

The MCS of the DSI of the primary MCH is always the same as the MCS of the MCCH; or the MCS of the DSI of the primary MCH is the same as the MCS of the MCCH only during the primary MCH carrying the MCCH .

The method may further include: the user equipment receives the DSI of the primary MCH on the primary MCH, and receives the DSIs of the other MCHs on the other MCHs, where the user equipments are to be decoded by the same MCS. Describe the DSI of other MCHs;

When the same MCS used by the DSI of the other MCH is the MCS of the MCCH, the user equipment acquires the MCS of the MCCH from the system broadcast message to decode the DSI of the other MCH; or

When the MCS of the DSI of the primary MCH is the MCS configured on the system broadcast message, the user equipment reads the system broadcast message and obtains the configured MCS of the DSI to decode the DSI of the other MCH.

When the MCS of the DSI of the primary MCH is the MCS of the MCCH, the user equipment acquires the MCS of the MCCH from a system broadcast message to decode the DSI of the primary MCH; or When the MCS of the DSI of the primary MCH is the MCS configured on the system broadcast message, the user equipment reads the system broadcast message and obtains the configured MCS of the DSI to decode the DSI of the primary MCH.

The invention also discloses a method for transmitting DSI, comprising:

The network side device combines the DSIs of all MCHs into one new DSI, and sends the new DSI on the primary MCH carrying the MCCH;

The user equipment receives the new DSI on the primary MCH.

In the above method, the new DSI uses the same MCS as the modulation and coding scheme (MCS) of the MCCH, and the method further includes: the user equipment acquiring the MCS of the MCCH from a system broadcast message, to decode The new DSI; or

The new DSI uses the MCS configured on the system broadcast message, the method further includes: the user equipment reads the system broadcast message and obtains the configured MCS of the DSI to decode the new DSI.

The MCS of the new DSI is the same as the MCS of the MCCH, where: the MCS of the new DSI is always the same as the MCS of the MCCH; or only the primary MCH bears the During the MCCH, the MCS of the new DSI is the same as the MCS of the MCCH.

The transmission period of the new DSI is the greatest common divisor of the scheduling period of the DSIs of all MCHs in the cell, or the least common multiple of the scheduling period of the DSIs of all MCHs.

If the user equipment only receives the DSI of the multimedia broadcast and multicast service (MBMS) that it is interested in, the step of the user equipment receiving the new DSI includes:

Determining, according to a scheduling period of the first MCH that carries the MBMS service that is interested in the user equipment, and a sending period of the new DSI, determining a receiving period of the new DSI, and receiving the new in a determined receiving period. DSI;

The new DSI received in the receiving period includes the DSI of the first MCH. The step of the user equipment receiving the new DSI in the receiving period includes: starting from a starting position of the new DSI, skipping M bytes length, and starting to read the used Subframe allocation information of the MBMS service that the user equipment is interested in;

Where M= nl *Biti+n2*Bit ₂ + ....+nk*Bit _k + r* Bit;

N1 indicates how many services are present on the first MCH before the first MCH in the new DSI, η1*Β3⁄4 indicates the total length of the DSI of the first MCH, and so on, nk indicates the new In the DSI, how many services are present on the kth MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the kth MCH, and r represents the interest of the transmitting user on the first MCH. The number of MBMS services carried before the MBMS service, r*Bit represents the total allocated byte length of the r services.

The invention also discloses a network side device supporting a system for transmitting DSI, and the network side device is set as:

The DSI of the primary MCH is transmitted on the primary MCH carrying the MCCH, and the same MCS is used in the DSI except the primary MCH. The same MCS used is the MCS of the MCCH, or the MCS configured on the system broadcast message.

The MCS used by the DSI of the primary MCH sent by the network side device on the primary MCH is the MCS of the MCCH, or the MCS configured on the system broadcast message.

The MCS of the DSI of the primary MCH is the MCS of the MCCH, the MCS of the DSI of the primary MCH is always the same as the MCS of the MCCH, or the MCCH is only carried by the primary MCH. During this period, the MCS of the DSI of the primary MCH is the same as the MCS of the MCCH.

The invention also discloses a user equipment supporting a system for transmitting DSI, the user equipment is set as:

Receiving, on the MCH, the DSI of the primary MCH sent by the network side device, and receiving the DSI of the other MCH sent by the network side device on the other MCH, and decoding the other MCH according to the same MCS. DSI.

The user equipment is further configured to: Obtaining the MCS of the MCCH from the system broadcast message to decode the DSI of the other MCH, or

The system broadcast message is read and the configured MCS of the DSI is obtained to decode the DSI of the other MCH.

The user equipment is further configured to:

Obtaining the MCS of the MCCH from a system broadcast message to decode the DSI of the primary MCH, or

Reading the system broadcast message and obtaining the configured MCS of the DSI to decode the main MCH

DSI.

The invention also discloses a system for transmitting DSI, comprising a network side device and a user equipment, wherein:

The network side device is configured to: send a DSI of the primary MCH on a primary MCH that carries an MCCH, and send a DSI of the other MCH on a MCH other than the primary MCH, where the other MCH DSI uses the same MCS;

The user equipment is configured to: receive a DSI of the primary MCH on the primary MCH, receive DSIs of the other MCHs on the other MCHs, and decode DSIs of the other MCHs according to the same MCS. The same MCS used by the DSI is the MCS of the MCCH, or the MCS configured on the system broadcast message;

The user equipment is further configured to: obtain an MCS of the MCCH from a system broadcast message, to decode a DSI of the other MCH, or obtain a configured MCS of the DSI from a system broadcast message, to decode the other MCH. DSI.

The MCS used by the DSI of the primary MCH sent by the network side device on the primary MCH is the MCS of the MCCH, or the MCS configured on the system broadcast message;

The user equipment is further configured to: obtain an MCS of the MCCH from a system broadcast message, to decode a DSI of the primary MCH, or read a system broadcast message and obtain a configured MCS of the DSI, to decode the primary MCH DSI. The MCS of the DSI of the primary MCH is the MCS of the MCCH, the MCS of the DSI of the primary MCH is always the same as the MCS of the MCCH, or only the primary MCH bearer. During the MCCH, the MCS of the DSI of the primary MCH is the same as the MCS of the MCCH.

The invention also discloses a network side device supporting a system for transmitting dynamic scheduling information (DSI), and the network side device is set as:

The DSIs of all MCHs are combined into a new DSI, and the new DSI is sent on the primary MCH carrying the MCCH.

The new DSI sent by the network side device on the primary MCH uses the same MCS as the MCS of the MCCH, or uses the MCS configured on the system broadcast message.

The same MCS of the new DSI is the same as the MCS of the MCCH, which means:

The MCS of the new DSI is always the same as the MCS of the MCCH; or the MCS of the new DSI is the same as the MCS of the MCCH only during the carrying of the MCCH by the primary MCH.

Receiving the new DSI sent by the network side device described above on the primary MCH.

The user equipment is further configured to:

The MCS of the MCCH is obtained from the system broadcast message to decode the new DSI, or the system broadcast message is read and the configured MCS of the DSI is obtained to decode the new DSI. When receiving the new DSI, the user equipment is further configured to: only receive the DSI of the MBMS it is interested in, and according to a scheduling period of the first MCH carrying the MBMS service of interest, and the new DSI a transmission period, determining a reception period of the new DSI, and receiving the new DSI in the determined reception period;

The new DSI received in the receiving period includes the DSI of the first MCH. When receiving a new DSI in the receiving period, the user equipment is further configured to:

Starting from the starting position of the new DSI, skipping M bytes of length, and starting to read subframe allocation information of the MBMS service that it is interested in;

Where M= nl *Biti+n2*Bit ₂ + ....+nk*Bit _k + r* Bit;

N1 indicates how many services are present on the first MCH before the first MCH in the new DSI, η1*Β3⁄4 indicates the total length of the DSI of the first MCH, and so on, nk indicates a new DSI How many services are present in the kth MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the kth MCH, and r represents the MBMS of the first MCH that is of interest to the user. The number of MBMS services carried before the service, r*Bit represents the total allocated byte length of the r services.

The network side device is configured to: merge the DSIs of all MCHs into a new DSI, and send the new DSI on the primary MCH carrying the MCCH;

The user equipment is arranged to receive the new DSI on the primary MCH.

In the above system, the new DSI sent by the network side device on the primary MCH uses the same MCS as the MCS of the MCCH, or uses the MCS configured on the system broadcast message;

The user equipment is further configured to: obtain an MCS of the MCCH from a system broadcast message to decode the new DSI, or read a system broadcast message and obtain a set MCS of the DSI to decode the new DSI. .

Upon receiving the new DSI, the user equipment is further configured to: only receive the Determining the DSI of the MBMS according to the scheduling period of the first MCH carrying the MBMS service in which it is interested, and the transmission period of the new DSI, and receiving the new DSI in the determined receiving period New DSI;

The new DSI received in the receiving period includes the DSI of the first MCH. When receiving a new DSI in the receiving period, the user equipment is further configured to: start from the starting position of the new DSI, skip M bytes length, and start to read the MBMS that is of interest to them. Subframe allocation information of the service;

Where M= nl *Biti+n2*Bit ₂ + ... .+nk*Bit _k + r* Bit;

N1 indicates how many services are present on the first MCH before the first MCH in the new DSI, η1 *Β3⁄4 indicates the total length of the DSI of the first MCH, and so on, nk indicates the new In the DSI, how many services are present on the kth MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the kth MCH, and r represents the interest of the transmitting user on the first MCH. The number of MBMS services carried by the MBMS service before, r*Bit represents the total allocated byte length of the r services.

After the technical solution of the present invention is used, the receiving terminal can accurately obtain the specific location information of the MBMS service to be accepted in a scheduling period. Specifically, when the UE needs to receive multiple MBMS services at the same time, the UE can obtain the services at one time. The scheduling information is used to prevent the UE from reading the distributed scheduling information multiple times, saving the UE power, improving the receiving efficiency, and having good radio interface signaling transmission efficiency. BRIEF abstract

1 is a schematic diagram of multicast resources allocated by an MSAP occasion of an MCH in the prior art;

Figure 2 (a) is a schematic diagram of resource allocation for Scheduling Period 1; Figure 2 (b) is a schematic diagram of resource allocation for Scheduling Period 2; Figure 2 (c) is Scheduling Period 3 (scheduling period) 3) Schematic diagram of resource allocation; FIG. 3 is a schematic diagram of configuration of dynamic scheduling information of multiple MCHs in the prior art;

4 is a configuration diagram of all services of multiple MCHs carried in an MCCH message in the prior art. Intention

5 is a schematic diagram of DSI content of an MCH in the prior art;

Figure 6 is a flow chart of Embodiment 1;

Figure 7 is a flow chart of Embodiment 2;

8 is a schematic diagram showing the relationship between an allocation period and a unified scheduling period in the present invention;

9 is a schematic diagram of uniformly configuring dynamic scheduling information of multiple MCHs into one DSI in the present invention;

Figure 10 is a schematic diagram of a unified DSI in the present invention;

11 is a flow chart of the DSI of the MBMS service that the UE receives in the present embodiment. Preferred embodiment of the invention

The technical solution of the present invention will be further described in detail below with reference to specific embodiments and drawings.

The invention discloses a system for transmitting scheduling information, which comprises a network side device and a user equipment. The network side device is configured to send the DSI of the primary MCH on the primary MCH carrying the MCCH, and send the DSIs of the other MCHs on the MCHs other than the primary MCH, where the other MCHs use the same MCS, and the same MCS may The MCS of the MCCH or the set MCS. The specific method of setting the same MCS may be to configure an MCS for all DSIs on the system broadcast message, including the DSI of the primary MCH and the DSI of other MCHs. Configure an MCS dedicated to DSI on the system broadcast message;

In this embodiment, the primary MCH may use the MCS of the MCCH or the MCS configured on the system broadcast message. When the primary MCH uses the MCS of the MCCH, it may be the same as the MCS of the MCCH, or only on the primary MCH. When there is MCCH (that is, MCCH appears on the primary MCH), the MCS of the primary MCH is the same as the MCS of the MCCH.

The user equipment (UE) is configured to receive the DSI of the primary MCH on the primary MCH, and receive the DSIs of the other MCHs on the other MCHs, where the other MCHs use the MCS of the MCCH as the same MCS, and the UE may broadcast the message from the system. Obtain the MCS of the MCCH to decode the DSI of the other MCH, and the other MCHs use the same MCS from the system broadcast message, the UE Acquiring the MCS of the DSI in the system broadcast message, and decoding the DSI of the other MCH according to the MCS; correspondingly, when the primary MCH uses the MCS of the MCCH, the UE may obtain the MCS of the MCCH from the system broadcast message to decode the DSI of the primary MCH; When the MCH uses the MCS configured in the system broadcast message, the UE obtains the MCS from the system broadcast message and decodes the DSI of the primary MCH.

The present invention also discloses a system for transmitting scheduling information, where a network side device is configured to combine DSIs of all MCHs into one new DSI (ie, DSI-new), and send DSI on the primary MCH carrying the MCCH. -new, where DSI-new can use the same MCS as the MCS of the MCCH, or configure an MCS for the DSI-new on the system broadcast message. The transmission period of the DSI-new can be the DSI of all MCHs in the cell. The greatest common divisor of the scheduling period, or the least common multiple of the scheduling period of all MCH DSIs;

The UE is configured to receive the DSI-new on the primary MCH, obtain the MCS of the MCCH from the system broadcast message, to decode the DSI-new, or read the MCS in the system broadcast message and decode the DSI-new;

In a preferred embodiment, the UE may also receive only the DSI of the MBMS service that it is interested in during the process of receiving the DSI-new, and according to the scheduling period of the first MCH carrying the MBMS service, and the new DSI-new a receiving period, determining a receiving period of the DSI-new, and receiving the DSI-new in the determined receiving period, where the received DSI-new in the receiving period determined by the UE includes the DSI of the first MCH;

When receiving the DSI-new in the receiving period, the UE skips M bytes length from the start position of the DSI-new, and starts to read the subframe allocation information of the MBMS service that is of interest to the UE;

Where ,= η1*Β +η2*Βίί ₂ + . . . . +η]ί*Βί + Γ* Bit;

N1 indicates how many services are present on the first MCH before the first MCH in the new DSI, η1*Β3⁄4 indicates the total length of the DSI of the first MCH, and so on, nk indicates that the new DSI appears. How many services are in total on the kth MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the kth MCH, and r represents the MBMS service on the first MCH before the user is interested in transmitting The number of MBMS services carried, r*Bit represents the total allocated byte length of r services.

The following describes the specific process of the above system transmission scheduling information.

Example 1 In this embodiment, one MBSRN area has one or more MCHs, and each MCH has one DSI, and each DSI is carried on the MAC CE as an example, indicating a process of transmitting dynamic scheduling information, where The MCH with MCCH is called the primary MCH. As shown in Figure 6, the following steps are included:

Step 601: The network side device sends the DSI of each MCH on each MCH, where the MCS sent by the DSI on the primary MCH is the same as the MCS of the MCCH or the same MCS configured in the system broadcast message for all MCHs. The DSIs sent on other MCHs other than the primary MCH use the same MCS;

In this step, the MCS of the DSI used on the primary MCH is the same as the MCS of the MCCH, and the MCS of the DSI of the primary MCH is always the same as the MCS of the MCCH, or only when the primary MCH carries the MCCH (ie, the primary When the MCCH occurs on the MCH, the MCS of the DSI of the primary MCH is the same as the MCS of the MCCH, and while the primary MCH does not carry the MCCH, the MCS of the DSI of the primary MCH may be the MCS of the MTCH carried on the primary MCH. The same MCS on the MCH other than the primary MCH, the same MCS used in the DSI of other MCHs can be the same as the MCS of the MCCH, or the same MCS configured on the system broadcast message (the MCS configured on the system broadcast message) It is different from the MCS of the MTCH carried on each MCH).

Step 602: The UE receives the DSI of each MCH on each MCH, where the DSI of each MCH is decoded according to the corresponding MCS.

When the UE receives the DSI of each MCH, the UE may perform corresponding processing according to the configuration of the network side, that is, when the MCS of the DSI used by the primary MCH and the MCS of the MCCH are always the same, the UE decodes the primary MCH according to the MCS of the MCCH. The DSI may be configured. When the primary MCH carries the MCCH, the MCS of the DCH of the primary MCH is the same as the MCS of the MCCH, and the UE decodes the DSI of the primary MCH by using the MCS of the MCCH only during the period in which the primary MCH carries the MCCH. When the DSI of the primary MCH uses the same MCS configured on the system broadcast message, the UE reads the system broadcast message, obtains the same MCS, and decodes the DSI of the primary MCH;

Similarly, when the DSI of other MCHs always uses the same MCS as the MCCH, the UE can decode the DSIs of other MCHs according to the MCS of the MCCH. When the DSIs of other MCHs use the same MCS configured on the system broadcast message, the UE Can read system broadcast messages and get the same An MCS, thereby decoding the DSI of other MCHs.

Example 2

This embodiment also uses one or more MCHs in an MBSFN area as an example to illustrate the process of transmitting dynamic scheduling information. As shown in FIG. 7, the following steps are included:

Step 700: The network side device combines the DSIs of all MCHs in the cell into a new DSI.

( DSI-new ) and carried in a MAC control element (MAC Control Unit, MAC CE for short);

Step 701: The network side device sends the DSI-new on the primary MCH, where the MCS of the DSI-new is the same as the MCS of the MCCH or the MCS configured on the system broadcast message.

The MCS of the DSI-new 发送 transmitted on the primary MCH is the same as the MCS of the MCCH, and the MCS of the DSI-new 主 of the primary MCH is always the same as the MCS of the MCCH, or only when the primary MCH carries the MCCH (ie, When the MCCH occurs on the primary MCH, the MCS of the DSI-new on the primary MCH is the same as the MCS of the MCCH;

The network side device periodically sends DSI-new on the primary MCH. The transmission period of the DSI-new may be the smallest MSAP occasion period of the MSAP occasion period of all the MCHs in the cell, or the MSAP occasion of all the MCHs. The least common multiple of the period.

Step 702: The UE receives the DSI-new on the primary MCH, and decodes the DSI-new according to the corresponding MCS.

In this step, when the MCS of the DSI-new is the same as the MCS of the MCCH, the UE decodes the DSI-new according to the MCS of the MCCH acquired from the system broadcast message, and the MCS of the DSI-new is used as the system broadcast message. When the MCS is configured, the UE reads the system broadcast message and obtains the MCS and then decodes the DSI-new;

Preferably, the UE may receive only the DSI of the MBMS service that it is interested in when receiving the DSI-new process. At this time, the UE determines according to the transmission period of the DSI-new and the MSAP occasion period of the MCH carrying the MBMS service of interest. The receiving period of the UE (that is, the UE needs to read DSI-new on which transmission periods of DSI-new to obtain the DSI of the MBMS service that it is interested in), and when the UE determines the receiving period, it can further skip the other Business, read only Taking the DSI of the MBMS service of interest in the DSI-new content, that is, the UE needs to know which MCH DSIs of the plurality of MCHs before the MCH carrying the MBMS service of interest also appear in the DSI-new; The UE directly skips without reading the DSI content of the MCH, and directly reads the MBSFN subframe allocation information of the service on the DSI of the MCH carrying the service of interest.

Specifically, when there are N MCHs in an MBSFN area, the numbers are 1, 2, ..., N, and each MCH has a scheduling period (ie, MSAP occasion), and the shortest scheduling period of these MSAP occasions is called For the unified scheduling period, the unified scheduling period = min{SPl, SP2, ....SPn}, where SPn is the scheduling period of the nth MCH, and the unified scheduling period may also be the greatest common divisor of all MCH scheduling periods, such as: There are five MCHs in an MBSFN area. The scheduling periods of these MCHs are 160ms, 320ms, 640ms, 320ms, and 160ms, respectively. The unified scheduling period of all MCHs in the MBSFN area is 160ms, and all MCHs of DSI-new in one MBSFN area. Sent on the unified scheduling period. When the network side allocates MBSFN subframe resources for multiple MCHs of one MBSFN area, the resources are allocated according to the maximum value of these MCH scheduling periods, and the allocation period is max{SP1, SP2, ....SPn}, Where SPn is the scheduling period of the nth MCH, and the allocation period may also be the least common multiple of all MCH scheduling periods, as shown in FIG. 8.

The period in which the network side device sends the DSI-new (hereinafter referred to as the DSI-new transmission period) may be a unified scheduling period for all MCHs, or may be an allocation period for all MCHs. Thus, DSI-new is in each DSI. When the -new transmission period is sent, the content includes dynamic scheduling information of some or all of the MCHs;

In this DSI-new, all MBMS services are arranged in order according to the order of MCH, that is, the arrangement of services is from small to large according to the number of their MCH, such as: {MCH1 ( MTCH1 , MTCH2 , ... MTCHn ), MCH2 ( MTCH1 , MTCH2 , ... MTCHn ) , .... MCHk ( MTCH1 , MTCH2 , ... MTCHn ) }. Since the order of all MCHs is indicated in the MCCH message, and the order of all services of each MCH is indicated, or the order of DSIs can be determined according to the order of MCHs in the MCCH, the network side and the UE can know Each MBMS service is in a specific location in DSI-new. Therefore, there is no need to explicitly indicate the logical channel identifier of each service in DSI-new. It is only necessary to configure {start/end, Start/end, .... start/end } , which is the first service of the first MCH, the second service of the first MCH, ... the first service of the mth MCH, the mth MCH The first service of the nth MCH of the second service, the second service of the nth MCH, ...the first service of the last MCH (MCHk), ....the last service of the last MCH (MCHk) , as shown in Figure 9.

In fact, each MCH has its own MSAP occasion period. That is, if the DSI-new transmission period is the unified scheduling period of all MCHs, some MCH DSIs do not exist in the configured DSI-new. in. For example, if there are three MCHs, the MSAP occasion periods are 320ms, 160ms, and 640ms respectively. If the DSI-new transmission period is the unified scheduling period (that is, 160ms) of all MCHs, the DSI content included in the DSI-new is:

At 160ms, {DSI1 , DSI2, DSI3 }

At 320ms, { DSI2 }

At 480ms, {DSI1 , DSI2 }

At 640ms, { DSI2 }

That is, in all MCH allocation periods (640ms), that is, in 4 unified scheduling periods.

(160ms) The content of DSI-new is: 3 MCH transfer information content is used in the first unified scheduling period (160ms); only MCH2 scheduling information content is in the second unified scheduling period (160ms). There are scheduling information contents of MCH1 and MCH2 on the three unified scheduling periods (160ms), and only the scheduling information content of MCH2 in the fourth unified scheduling period (160ms). The four unified scheduling periods (160ms) constitute an allocation period. MCH2 is scheduled 4 times in the 640ms allocation period, while MCH1 is scheduled 2 times, and MCH3 is scheduled only once, as shown in Figure 9.

A list of all MBMS services of all MCHs is configured on the MCCH message, and an MSAP occasion period of each MCH is also configured. In this embodiment, the three MCHs in the figure are taken as an example to illustrate how the UE correctly obtains the allocation of MBSFN subframes of each MBMS service on one DSI-new.

For the convenience of description, it is assumed that there are 2 services on each MCH, and there are a total of 6 services, and the other ones are service 1 , service 2 , ... , service 6 (service 1, service 2, ..., ... service 6) , its Service 1 and service 2 are carried on the first MCH, service 3 and service 4 are carried on the second MCH, and service 5 and service 6 are carried on the third MCH: { service 1 , service 2 } ^ MCHl; {service3 , service4} ^ MCH2; {service5 , service6} MCH3.

If it is indicated by 3 DSIs in the prior art, it is {MTCHl , MTCH2} ^ MCHl; { MTCHl , MTCH2} ^ MCH2; { MTCHl , MTCH2} ^ MCH3. The UE may obtain the allocation of the MBSFN subframe of each service according to the logical channel identifier according to the order of the MCH on the MCCH, DSI {start/end, start/end}; DSI 2^ {start/end, start/end}; DSI 3^ {start/end, start/end}. In the present invention, the contents of DSI-new are { start/end, start/end, start/end, start/end, start/end, start/end}, which are essentially the contents of {DSI1, DSI2, DSI3}. .

Since different MCHs have different MSAP occasion periods, as shown in Figure 10, the DSI of some MCHs may appear on different unified scheduling periods as follows:

160ms, { start/end, start/end, start/end, start/end, start/end, start/end }

320ms, { start/end }

480ms, { start/end, start/end }

640ms, { start/end }

In the first MSAP occasion period, the UE can know the resource allocation of the six services; in the second MSAP occasion period, the UE knows that only one MCH (ie, MCH2) has DSI, thereby obtaining the subframe resource allocation of services 1 and 2. In the third MSAP occasion period, the UE knows that there are 2 MCHs (MCH1 and MCH2) having DSI, thereby obtaining subframe resource allocation information of services 1, 2, 3, 4; in the fourth MSAP occasion period, UE It is known that only one MCH (MCH2) has DSI, thereby obtaining subframe resource allocation information of services 1 and 2.

Without loss of generality, let me give another example. When there are 5 MCHs (MCH1, MCH2, ... MCH5), assuming there are 2 services on each MCH, the total service is {service 1, service2, ....servicelO}, and the MSAP occasion period of each MCH For {320, 160, 480, 640, 160}.

The UE obtains the MSAP occasion period of each MCH from the MCCH, and can also know which MCH DSI contents are included in the DSI-new in different MSAP occasion periods, such as included in the third MSAP occasion period, DSI-new. MCHl , MCH2, MCH5 Dynamic scheduling information, then D SI-new= { start/end, start/end, start/end, start/end, start/end, start/end } , the UE can know that the other is service 1, service2, service3 , service4, service9, servicelO (ie, service 1, service 2, service 3, service 4, service 9, service 10) MBSFN subframe allocation information, MCH3 and MCH4 have no DSI.

In an MBSFN area, the UE may only be interested in one MBMS service on one MCH, and the UE does not need to read the allocation information of the subframe resources of the MBMS service on each MCH in the DSI-new content. The UE knows which MCH the service is interested in according to the MCCH message, and then knows the MSAP occasion period of the MCH according to the MCCH message, and can read DSI-new in the first unified scheduling period that carries its DSI. The UE can read the MCCH and obtain the MCH on which the service of interest is on. In which unified scheduling periods, the DSI-new is read. When the UE reads the DSI-new content, the MCH and the MTCH that are not interested can be skipped. Read the subframe allocation information of the MTCH of interest.

If there are a total of N MCHs in an MBSFN area, and there are M services carried on each MCH, the information is configured on the MCCH message, and is sequentially arranged as 1~M services on MCH1, 1~ on MCH2. M services, ..... 1~M services on MCH-N. In this way, if a UE is interested in the i-th MBMS service, the DSI of the MBMS service is received according to the following process, as shown in FIG.

Step 1100: The UE determines the receiving period according to the MSAP occasion period of the MCH carrying the i services and the sending period of the DSI-new (new DSI), that is, determining which unified scheduling periods the UE is reading. DSI-new), where the DSI content of the MCH is necessarily included in the DSI-new content sent on the determined receiving period;

Step 1101: The UE reads the i-th MBMS service of interest in the DSI-new content in the determined receiving period:

In this step, when the UE reads the i-th MBMS service, the UE needs to know in the multiple MCHs before the MCH that carries the i-th MBMS service (configured in the list of all MCHs on the MCCH message, before the MCH sequence number) A number of MCHs, which DCHs of the MCH also appear in the DSI-new. Specifically, the UE can know that the MSI occasion period of all MCHs in the MCCH message is known to be in the DSI-new during the unified scheduling period. Whether to include the DSI content of these MCHs; Then, the UE can directly skip the DSI content of the MCH without reading the DSI content of the MCH, and directly read the MBSFN subframe allocation information of the MBMS service on the DSI of the MCH carrying the service of interest.

For the above steps 1100 and 1101, a formula can be used to visually illustrate that one MBSFN area has N MCHs (1, 2, ..., η, ..., Ν), and the services carried on each MCH are ( l,2,...M ) _n . The service i of interest to the UE is on the nth MCH (MCH-n). On DSI-new of a DSI carrying MCH-n, the DSI with k MCHs before the MCH-n is also carried on DSI-new. At the same time, the MBSFN subframe allocation of each service uses start/end of the same bit length, which is equal to the MSAP occasion perod of the MCH carrying it, such as: 8 bits can be used when the MSAP occasion period is equal to 320 ms.

First: The UE starts from the DSI-new start bit and skips the A byte length to reach the DSI content of the nth MCH of the i th service, where:

A=nl *Bit ₁ +n2*Bit ₂ + ....+nk*Bit _k

In the above formula: nl represents how many services are present on the first MCH before the first MCH in the new DSI (DSI-new), and η1*Β3⁄4 represents the total length of the DSI of the first MCH, in turn Similarly, nk represents how many services are present on the kth MCH before the MCH in DSI-new, and nk*Bit _k represents the total length of the DSI of the kth MCH, where, due to the MSAP occasion period of each MCH The bit length Bit (start/end) of the MBSFN subframe allocation of the service on the MCH may be different, and nl, n2, nk may be discontinuous because DSI without one or more MCHs is allowed on the DSI-new. content.

Secondly, the UE skips the length of B bytes and reads the subframe allocation information of the i-th service. among them:

B=r* Bit (start/end).

The i-th service is carried on each MCH (for example, the n-th MCH), and there are a total of m services on the MCH, and r services are carried on the MCH (Km) before the i-th service. r*Bit represents the total allocated byte length of r services.

In summary, according to the MCCH message, the UE can know which unified scheduling periods are read.

DSI-new, and can only read MBSFN subframe allocation information of the service of interest. For example, if only the service5 is interested, the UE needs to read the DSI-new in the first unified scheduling period, and the other unified scheduling period does not carry the subframe resource configuration information of the service5. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

With the technical solution of the present invention, the receiving terminal can accurately obtain the specific location information of the MBMS service to be accepted in a scheduling period. Specifically, when the UE needs to receive multiple MBMS services at the same time, the scheduling of the services can be obtained at one time. The information prevents the UE from reading the distributed scheduling information multiple times, saves the power of the UE, improves the receiving efficiency, and has good signaling efficiency of the wireless interface signaling.

Claims

Claim

A method of transmitting dynamic scheduling information (DSI), the method comprising:

The network side device transmits the DSI of the primary MCH on a primary multicast channel (MCH) carrying a multicast control channel (MCCH), and respectively transmits the DSI of the other MCH on other MCHs other than the primary MCH. The DSI of the other MCHs all use the same modulation and coding scheme (MCS).

2. The method of claim 1 wherein

The same MCS used by the DSI of the other MCH is the MCS of the MCCH, or the same MCS used by the DSI of the other MCH is the MCS configured on the system broadcast message.

3. The method of claim 1, wherein

The MCS of the DSI of the primary MCH is the MCS of the MCCH, or

The MCS of the DSI of the primary MCH is the MCS configured on the system broadcast message.

4. The method of claim 3, wherein

5. The method of claim 2, the method further comprising:

The user equipment receives the DSI of the primary MCH on the primary MCH, and receives the DSIs of the other MCHs on the other MCHs, where the user equipments will decode the DSIs of the other MCHs according to the same MCS;

When the MCS of the DSI of the primary MCH is the MCS configured on the system broadcast message, the user equipment reads the system broadcast message and obtains the configured MCS of the DSI to decode the Describe the DSI of other MCHs.

6. The method of claim 3, the method further comprising:

When the MCS of the DSI of the primary MCH is the MCS of the MCCH, the user equipment acquires the MCS of the MCCH from a system broadcast message to decode the DSI of the primary MCH; or

When the MCS of the DSI of the primary MCH is the MCS configured on the system broadcast message, the user equipment reads the system broadcast message and obtains the configured MCS of the DSI to decode the DSI of the primary MCH.

7. A method of transmitting dynamic scheduling information (DSI), the method comprising:

The network side device combines the DSIs of all multicast channels (MCH) into a new DSI, and transmits the new DSI on the primary MCH carrying the multicast control channel (MCCH);

The user equipment receives the new DSI on the primary MCH.

8. The method of claim 7, wherein

The new DSI uses the same MCS as the modulation and coding scheme (MCS) of the MCCH, and the method further includes: the user equipment acquiring the MCS of the MCCH from a system broadcast message, to decode the new DSI; or

The new DSI uses the MCS configured on the system broadcast message,

The method further includes: the user equipment reading a system broadcast message and obtaining a configured MCS of the DSI to decode the new DSI.

9. The method of claim 8 wherein

The same MCS of the new DSI is the same as the MCS of the MCCH, which means:

The MCS of the new DSI is always the same as the MCS of the MCCH; or the MCS of the new DSI is the same as the MCS of the MCCH only when the primary MCH carries the MCCH.

10. The method of claim 7, 8 or 9, wherein

11. The method of claim 10, wherein

The new DSI received in the receiving period includes the DSI of the first MCH.

12. The method of claim 11 wherein

The step of the user equipment receiving the new DSI in the receiving period includes: starting from a starting position of the new DSI, skipping M bytes length, and starting to read the user equipment is interested in Subframe allocation information of the MBMS service;

Where Μ= η1*Β +η2*Βίί ₂ +....+η]ί*Βί + Γ* Bit;

13. A network side device supporting a system for transmitting dynamic scheduling information (DSI), wherein the network side device is configured to:

Transmitting a DSI of the primary MCH on a primary multicast channel (MCH) carrying a multicast control channel (MCCH), and transmitting DSIs of the other MCHs on other MCHs other than the primary MCH, where the other The MSI's DSI uses the same modulation and coding scheme (MCS).

14. The network side device according to claim 13, wherein The same MCS is the MCS of the MCCH, or is the MCS configured on the system broadcast message.

The network side device according to claim 13 or 14, wherein

16. The network side device according to claim 15, wherein

The MCS of the DSI of the primary MCH is the MCS of the MCCH, which means:

17. A user equipment supporting a system for transmitting dynamic scheduling information (DSI), the user equipment being set to:

Receiving, on the primary multicast control channel (MCH), the DSI of the primary MCH sent by the network side device according to claim 13, and receiving the DSI of the other MCH sent by the network side device on the other MCH, And decoding the DSI of the other MCH according to the same modulation and coding scheme (MCS).

18. The user equipment of claim 17, the user equipment is further configured to:

Obtaining the MCS of the Multicast Control Channel (MCCH) from the system broadcast message to decode the DSI of the other MCH, or

19. The user equipment of claim 18, the user equipment is further configured to:

DSI.

20. A system for transmitting dynamic scheduling information (DSI), the system comprising the claims The network side device according to any one of claims 13 to 16, and the user equipment according to any one of claims 17 to 19.

21. A network side device supporting a system for transmitting dynamic scheduling information (DSI), wherein the network side device is configured to:

The DSIs of all multicast channels (MCH) are combined into a new DSI, and the new DSI is transmitted on the primary MCH carrying the Multicast Control Channel (MCCH).

22. The network side device according to claim 21, wherein

The new DSI transmitted by the network side device on the primary MCH uses the same MCS as the MCCH modulation and coding scheme (MCS), or uses the MCS configured on the system broadcast message.

The network side device according to claim 22, wherein

The same MCS of the new DSI is the same as the MCS of the MCCH, which means:

The network side device according to any one of claims 21 to 23, wherein

25. A user equipment supporting a system for transmitting dynamic scheduling information (DSI), the user equipment being set to:

The new DSI transmitted by the network side device according to claim 21 is received on a primary multicast channel (MCH).

The user equipment of claim 25, wherein the user equipment is further configured to:

Obtaining a modulation coding scheme (MCS) of a multicast control channel (MCCH) from a system broadcast message to decode the new DSI, or

The system broadcast message is read and the configured MCS of the DSI is obtained to decode the new DSI.

The user equipment according to claim 26, wherein, when receiving the new DSI, the The user equipment is also set to:

Receiving only the DSI of the multimedia broadcast and multicast service (MBMS) that it is interested in, and determining the new one according to the scheduling period of the first MCH carrying the MBMS service in which it is interested, and the transmission period of the new DSI Receiving period of the DSI, receiving the new DSI in a determined receiving period;

The new DSI received in the receiving period includes the DSI of the first MCH.

The user equipment of claim 27, wherein, when receiving a new DSI in the receiving period, the user equipment is further configured to:

Where M= nl *Biti+n2*Bit ₂ + ....+nk*Bit _k + r* Bit;

A system for transmitting dynamic scheduling information (DSI), the system comprising the network side device according to any one of claims 21-24 and the user equipment according to any one of claims 25-28 .