WO2007104202A1

WO2007104202A1 - A transmission method and apparatus for schedule information

Info

Publication number: WO2007104202A1
Application number: PCT/CN2006/003570
Authority: WO
Inventors: Sheng Liu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-03-15
Filing date: 2006-12-25
Publication date: 2007-09-20
Also published as: CN101039452B; CN101039452A

Abstract

A transmission method and apparatus for schedule information are disclosed, which enable the base station to perform E0DCH uplink packet scheduling according the up to date schedule information (SI) report. In the present invention, judging whether the received data is the first transmission by the retransmission sequence number (RSN) transmitted by the E-DPCCH, if yes, recording the time of arrival for the first transmission of the data by storing connection frame number and sub-frame number corresponding to the TTI of the data. When having received the data containing SI, judging whether the time of arrival for the first transmission of the data is later than the time of receipt for the last stored SI, if yes, performing scheduling according to the SI contained in the data, and updating the time of receipt for the last stored SI as the time of arrival for the first transmission of the data, otherwise, ignoring the SI contained in the data.

Description

Method and device for transmitting scheduling information

This application claims priority to Chinese Patent Application No. 200610067777.5, entitled "Transmission Method and System for Scheduling Information in Enhanced Dedicated Channels", filed on March 15, 2006, the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present invention relates to mobile communication technologies, and in particular, to a method and an apparatus for transmitting scheduling information. Background technique

UMTS (Universal Mobile Telecommunication System) is one of the world's leading third generation mobile communication systems (The Third Generation, referred to as "3G"). The UMTS system consists of three parts, namely Core Network ("CN"), UMTS Terrestrial Radio Access Network (UTRAN) and User Equipment (User Equipment, referred to as "UE" is composed. The interface between the CN and the UTRAN is defined as an Iu interface, and the interface between the UTRAN and the UE is defined as a Uu interface.

The earliest protocol version of UMTS is R99. In this version, the bearers of uplink and downlink services are based on dedicated channels, and the data transmission rate that can be achieved is 384Kbps. However, with the increasing demand for high-speed data transmission, the UMTS standards development organization has successively introduced the protocol specifications of the three phases of R4, R5 and R6, and introduced High Speed Downlink Packet Access (referred to as High Speed Downlink Packet Access). "HSDPA" technology and High Speed Uplink Packet Access (HSUPA) technology can provide peak rates of up to 14.4Mbps and 5.76Mbps, respectively, while greatly improving frequency efficiency.

The main features of HSUPA in the R6 version include: 2ms short frame or 10ms frame, Hybrid Automatic Repeat Request (HARQ) for the physical layer, and fast scheduling technology for the uplink base station. In order to achieve high-efficiency transmission of user uplink data, HSUPA newly adds two uplink physical channels and three downlink physical channels, which are respectively enhanced dedicated physical data channels for transmitting data (E-DCH Dedicated Physical Data Channel). "E-DPDCH,"), used to transmit an E-DCH Dedicated Physical Control Channel (E-DPCCH), which is used to control the absolute transmission rate of the user's uplink transmission rate. Channel-Enhanced-DCH Absolute Grant Channel (E-AGCH) and En-anced-DCH Relative Grant Channel (referred to as "E-RGCH"), and an HARQ indicator channel (E-DCH Hybrid ARQ Indicator Channel, "E-HICH") for carrying ACK (Acknowledgement)/NACK (No Acknowledgement) information from the base station. In addition to adding channels to the physical layer, in order to cooperate with HSUPA, MAC-e (e-enhancement) and MAC-es (e-refer to enhancement) are introduced in Medium Access Control (MAC). In the SRNC, two sub-layers are used to support HARQ and fast scheduling. At the same time, MAC-e Protocol Data Unit (MAC-e Protocol Data Unit, MAC-e PDU) can be used to carry signaling and MAC-e at the base station. The layer reads this signaling. When a MAC-e PDU is formed in the MAC-e sublayer, signaling MAC-es PDUs may be multiplexed, that is, multiple MAC-e PDUs are integrated into MAC-es PDUs. MAC-e and MAC-es are between the physical layer and MAC-d (d refers to dedicated).

Specifically, the protocol related to the Enhanced-Dedicated Channel (E-DCH) on the wireless air interface (Uu interface) mainly involves the physical layer, the MAC layer, and the corresponding radio resource control layer (Radio Resource). Controller, referred to as "RRC" layer. The MAC layer of the E-DCH includes three MAC sublayers of MAC-e, MAC-es, and MAC-d. On the UTRAN side, the MAC-e entity is in the base station, the MAC-es entity is in the Serving Radio Network Controller (SRNC), and on the UE side, there is no distinction between MAC-e and MAC-es. , they exist in the same functional unit.

The MAC layer structure of the UE-side E-DCH is as shown in FIG. 1. On the UE side of the E-DCH, the logical channel dedicated traffic channel from the Radio Link Control (RLC) layer (Dedicated) The Traffic Channel ("DTCH") and the Dedicated Control Channel ("DCCH") first enter the MAC-d to form a MAC-d protocol data unit ("PDU"), which is the same logical channel. The MAC-d PDU then forms a MAC-es PDU via MAC-es. The MAC-es PDU further forms a MAC-e PDU in the MAC-e, and finally maps to the physical layer via the E-DCH transport channel.

The MAC layer structure of the E-DCH on the UTRAN side is as shown in FIG. 2. At the receiving end of the E-DCH, that is, on the UTRAN side, the MAC-e PDU from the E-DCH transport channel is first recovered by the MAC-e existing in the base station. After processing, the MAC-es PDU is formed, and then transmitted to the SRNC, and the MAC-es first performs macro diversity selection, reordering, etc., and then the MAC-d PDUs are decomposed and sent to the MAC-d unit, and finally The channel DTCH and DCCH are sent to the RLC layer. The MAC-e PDU includes a header and a payload portion, and its structure is as shown in FIG. 3. The payload portion of the MAC-e PDU includes a plurality of multiplexed together to form a MAC-es PDU, optionally for uplink fast packet scheduling. The length is 18 bits of scheduling information (SI), and the possible padding field is used to make the length of the MAC-e PDU equal to the specified E-DCH transport block length, and the MAC-e PDU header is set by each MAC-es The corresponding parameter data description indication (Data Description Indicator, "DDI") field and N field of the PDU are both 6 bits in length. In addition, the header of the MAC-e PDU also includes an optional DDI0. Field.

According to the protocol specification TS25.321 of 3GPP, the format of the MAC-e PDU has the following four structures depending on whether the SI is transmitted and the number of remaining bits D, wherein the remaining number of bits D is the length of the E-DCH transport block minus the MAC-e PDU. The number of bits remaining for the length of n MAC-es PDUs and their corresponding n DDI and N fields included in the MAC-e PDU header.

(a) separately transmitting the MAC-e PDU of the SI, the MAC-e PDU being composed of the 18-bit long SI;

(b) when the remaining bit number D is smaller than the IS bit, the SI is not transmitted and the remaining bits are padding bits;

(c) When the number of remaining bits D is equal to or greater than 18 bits but less than 24 bits, the SI is directly cascaded at the end of the MAC-es PDU, and the remaining bits are padding bits (0-5 bits);

(d) When the remaining number of bits D is equal to or greater than 24 bits, the SI is concatenated at the end of the MAC-es PDU, and a special DDI is added at the end of the MAC-e PDU header, that is, DDI0 = "111111", the rest The bits are padding bits.

Since SI is the measurement information on which the E-DCH performs base station-based uplink fast packet scheduling, the E-DCH supports two SI reporting methods based on periodic triggering and event triggering.

According to the latest protocol specification TS25.321 of 3GPP, when the UE is in a state in which data is not allowed to be transmitted, that is, the service authorization parameter is a special value "Zero-Grant," or all HARQ processes are in an inactive state, if the UE is original The data buffer changes from zero to greater than zero, that is, the UE transitions from no data transmission to data transmission, or although there is data in the original data buffer (not allowed to be sent due to base station resource scheduling reasons), but there is new When high-priority data arrives, the UE needs to periodically send the SI to the base station on the E-DPDCH until the service authorization of the base station is finally obtained, where the SI report trigger period is controlled by the radio resource (Radio Resource Control called "RC") ) layer configuration parameters The number "Regularity for Scheduling Info-no grant" is controlled.

Even if the UE is in a state in which data is allowed to be transmitted, that is, the service authorization parameter is not equal to "Zero-Grant" and at least one HARQ process is in an active state, when the serving cell of the E-DCH changes and the new E-DCH serving cell is not in the original When the service E-DCH radio link is concentrated, or when the timing period specified by the RRC configured parameter "Stagement for Scheduling Info-grant" is reached, the SI report is also triggered to be sent on the E-DPDCH.

The typical values of the parameters "statority for Scheduling Info-no grant" and "statisticity for Scheduling Info-grant" are 2ms, 4ms, 10ms, 20ms, 50ms, 100ms, 200ms, 500ms, 1000ms. The reasonable SI trigger period is The system is determined based on information such as an E-DCH scheduling policy and a base station processing resource status.

In addition, when the SI is transmitted with the data in the MAC-e PDU, if the HARQ entity cannot correctly transmit the MAC-e PDU to the radio link set including the E-DCH serving cell, a new SI report will also be triggered.

Currently, there are two ways to transmit SI on the E-DPDCH, which is a method in which the SI is transmitted by the MAC-e PDU separately. In this case, the entire MAC-e PDU is composed of the 18-bit long SI, and the other Is the way the SI is transmitted along with the data in the MAC-e PDU, in which case the SI is placed at the end of each MAC-es PDU.

Since the E-DPDCH operates with HARQ, the transmission of the SI also supports HARQ operations. According to the current version of TS25.321, for the case of SI transmission alone, the maximum number of transmissions is fixed 8 times; for the case where SI is transmitted together with data in the MAC-e PDU, the maximum number of retransmissions is determined by the MAC-e. The HARQ configuration parameter of the E-DCH MAC-d flow in the data part transmitted simultaneously with the SI in the PDU is determined by the "E-DCH MAC-d flow" of the RRC information element ("Information", simply referred to as 'ΊΕ"). Maximum number of retransmission "E-DCH MAC-d flow maximum number of retransmissions" is given, its value ranges from 0 to 15 times.

Since the HARQ operation in the E-DCH adopts the synchronization mode, that is, the initial transmission and retransmission of a HARQ process always occur at a fixed time, therefore, the transmission interval of 2 ms is

(Transmission Time Interval, referred to as "ΤΤΓ") mode, there are a total of 8 parallel HARQ processes. For the 10 ms TTI mode, there are a total of 4 parallel HARQ processes. Therefore, a retransmission time of the HARQ process in the E-DCH ( That is, the UE sends a MAC-e PDU from a TTI to the UE. The time when the non-received response message NACK sent by the base station is received and the data is retransmitted is received, which is 8x2ms or 16ms for the 2ms TTI mode and 4x1 Oms or 40ms for the 10ms TTI mode.

In practical applications, the above solution has the following problems: The base station may not be able to obtain the latest SI report, thereby affecting the performance of the E-DCH uplink packet scheduling.

The main reason for this is that in the two modes of transmitting the SI on the E-DPDCH, for the 2ms TTI, if the SI is transmitted separately, the maximum transmission is required 8 times, that is, the maximum time needs to be 7x16ms or 112ms. If the SI is transmitted together with the data in the MAC-e PDU, it may require a maximum of 15 retransmissions, that is, a maximum of 15x16ms or 240ms; for a 10ms TTI, if the SI is transmitted separately, a maximum of 8 transmissions are required. That is to say, the maximum need to pass 7x40ms or 280ms. If the SI is transmitted together with the data in the MAC-e PDU, it may take up to 15 retransmissions, that is, the maximum time is 15x40ms or 600ms.

However, since the user terminal generates an event specified in the SI report triggering mechanism, reaches a period specified in the SI report trigger mechanism, or a remaining bit number D of a certain MAC-e PDU is equal to or greater than 18, the user terminal needs to The base station sends a new SI 4 report. Moreover, since the SI transmission has a very high priority, even if the SI is allowed to be transmitted on the HARQ process where the service authorization parameter is a special value "zero-authorization Zero_Grant" and the HARQ process in the inactive state, it is not difficult to find that During a HARQ retransmission of a certain SI report, it is highly likely that the user terminal needs to send a new SI to the base station.

As shown in FIG. 4, other HARQ processes may transmit a new SI report except for the HARQ process in which the old SI report is retransmitted, and if the old SI report is retransmitted, if the new SI report has already been After being successfully received by the base station, when the old SI report successfully completes the transmission, the new SI report will be overwritten, resulting in the base station not acquiring the latest SI report, which greatly reduces the performance of the uplink packet scheduling.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and an apparatus for transmitting scheduling information, so as to solve the problem that the E-DCH uplink packet scheduling of the pre-admission dedicated channel cannot be performed according to the latest scheduling information SI report in the prior art.

In order to solve the above technical problem, an embodiment of the present invention provides a transmission side of scheduling information. Law, including steps:

The base station records the arrival time of the initial transmission of the data;

If the data correctly received by the base station includes scheduling information, scheduling is performed according to scheduling information in the data only when the arrival time of the data is later than the stored latest scheduling information receiving time, and The scheduling information reception time is updated to the arrival time of the data.

In addition, an embodiment of the present invention further provides a transmission apparatus for scheduling information, where the system includes: a recording unit, configured to record an arrival time of initial transmission of data;

a storage unit, configured to store a latest scheduling information receiving time;

a scheduling unit, configured to schedule resources according to scheduling information;

And an update unit, configured to be connected to the storage unit, configured to update the stored last scheduled information reception time to an arrival time of the initial transmission of the data;

a determining unit, connected to the recording unit, the storage unit, the scheduling unit, and the updating unit, respectively, configured to determine whether the received data is an initial transmission, and if yes, notifying the recording unit to record an arrival time of the initial transmission of the data, and When the data is correctly received, it is judged whether it includes scheduling information, and if so, whether the arrival time of the data in the recording unit is later than the latest scheduling information receiving time in the storage unit, if If yes, the calling unit is triggered to perform scheduling according to the scheduling information, and the updating unit is notified to update the stored last scheduling information receiving time to the arrival time of the initial transmission of the data.

In addition, an embodiment of the present invention further provides a method for transmitting scheduling information, where the method includes the following steps:

When the user terminal separately transmits the scheduling information to the base station, if the user terminal has new scheduling information to be transmitted during the retransmission of the scheduling information, the user terminal immediately stops retransmitting the separately transmitted scheduling information.

The embodiment of the present invention further provides a method for transmitting scheduling information, where the method includes the following steps: When the user terminal separately transmits the scheduling information to the base station, if the transmission fails, the retransmission of the separately transmitted scheduling information is prohibited, and at the same time, the recent New scheduling information is transmitted on a transmission time interval capable of transmitting scheduling information.

The embodiment of the present invention determines whether the received SI report is the latest advertisement sent by the user terminal, or stops the previously separately sent SI when the user terminal needs to send a new SI. The retransmission ensures that the base station can obtain the latest SI report from the user terminal in time, avoiding the problem that the new SI report may be covered by the old SI report due to the retransmission of the SI, thereby ensuring the E-DCH uplink. The performance of packet scheduling.

DRAWINGS

1 is a schematic structural diagram of a UE-side E-DCH MAC in the prior art;

2 is a schematic diagram of a structure of an E-DCH MAC on a UTRAN side in the prior art;

3 is a schematic structural diagram of a MAC-e PDU in the prior art;

4 is a schematic diagram of a plurality of HARQ process transmission SI reports in the prior art;

5 is a structural diagram of a transmission apparatus for scheduling information in an E-DCH according to a first embodiment of the present invention; FIG. 6 is a flowchart of a method for transmitting scheduling information in an E-DCH according to a second embodiment of the present invention; A flowchart of a method for transmitting scheduling information in an E-DCH according to a third embodiment; FIG. 8 is a flowchart of a method for transmitting scheduling information in an E-DCH according to a fourth embodiment of the present invention. detailed description

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

The core of the present invention is that the base station on the UMTS Terrestrial Radio Access Network (UTRAN) side records the arrival time of the received new data, and judges that it is correctly received and includes Whether the data with the scheduling information SI is used as the arrival time of the new data transmission later than the stored last SI reception time. If yes, the base station schedules the resource according to the SI within the data, and stores the stored last SI. The reception time is updated to the arrival time of this data as a new data transmission. Or, the user terminal determines, during the retransmission period of the separately transmitted SI, whether a new SI needs to be sent to the base station, and if so, immediately stops retransmitting the separately transmitted SI, and newly renews the TTI on the TSI that can transmit the new SI recently. The SI is transmitted to the base station.

In the following specific embodiments of the present invention, the latest scheduling information SI is transmitted by enhancing the dedicated channel, but is not limited to using the enhanced dedicated channel transmission, and other channel transmissions may also be used, where the enhanced transmission channel is taken as an example. To illustrate.

5 is a structural diagram of a transmission apparatus for scheduling information in an enhanced dedicated channel (E-DCH) according to a first embodiment of the present invention. The apparatus may exist independently in a network, or may be coupled to a base station on a UTRAN side. in. This embodiment is described by taking an example in which the device is coupled to a base station.

The device includes: a recording unit 51, a storage unit 52, a scheduling unit 53, an updating unit 54, Judging unit 55. The recording unit 51 is configured to record the arrival time of the first transmission; the storage unit 52 is configured to store the latest scheduling information receiving time; the scheduling unit 53 is configured to schedule resources according to the scheduling information; The updating unit 54 is connected to the storage unit 52, and is configured to update the receiving time of the stored last scheduling information to the arrival time of the initial transmission of the data; the determining unit 55, the recording unit 51, the storage unit 52, and the scheduling The unit 53 and the updating unit 54 are respectively connected to determine whether the received data is the initial transmission, that is, whether it is new data. If yes, the recording unit 51 is notified to record the arrival time of the initial transmission of the data, and is correctly received. When the data is received, and is further used to determine whether the data includes scheduling information, and if so, whether it is further determined whether the arrival time of the data in the recording unit 51 is later than the latest scheduling information in the storage unit 52. Receiving time, if yes, triggering the calling unit 53 to perform scheduling according to the scheduling information, and notify The said updating unit 54 stores the last scheduled reception time information updates the initial time of arrival for the data transmission. When the arrival time of the data is earlier than the stored last scheduled information reception time, the scheduling information in the data is discarded.

The interconnection between the units of the apparatus (which is exemplified in the base station) in the present embodiment will be briefly described below.

The determining unit 55 determines whether the data received by the base station from the UE side of the user equipment is new data, and if so, that is, when the data is the initial transmission, the notification recording unit 51 records the arrival time of the initial transmission of the data. When the data from the UE side is correctly received by the base station, the determining unit 55 determines whether the SI is included in the data, and if so, further determines whether the arrival time of the data recorded in the recording unit 51 is later than the storage unit 52. The last SI reception time. If the judging unit 55 judges that the data including the SI is received later in the recording unit 51 than the last SI reception time in the storage unit, the trigger scheduling unit 53 performs scheduling according to the SI within the data. And notifying the update unit 54 to update the stored reception time of the most recent SI to the arrival time of the initial transmission of the data, otherwise, ignore the SI within the data.

6 is a flowchart of a method for transmitting scheduling information in an E-DCH according to a second embodiment of the present invention, where the method includes the following steps:

If the data correctly received by the base station includes scheduling information, only when the arrival time of the data is later than the stored latest scheduling information receiving time, according to the scheduling information in the data. 03570

-9 one

Scheduling, and updating the scheduling information receiving time to the arrival time of the data.

If the data correctly received by the base station includes scheduling information, and the arrival time of the data is earlier than the stored latest scheduling information receiving time, the scheduling information in the data is ignored.

The specific implementation process is shown in Figure 6:

In step 610, the base station receives and decodes the E-DPCCH of the current transmission time interval ("Transmission Time Interval" for short). Specifically, the base station obtains the current by receiving and decoding the enhanced dedicated physical data channel E-DPCCH of the current TTI. Relevant control information of data transmitted in the E-DPDCH within the TTI.

Next, proceeding to step 620, the base station determines whether the data transmitted in the E-DPDCH in the current TTI is the initial transmission. Specifically, it is determined whether the data transmitted in the current TTI internal E-DPDCH is the initial transmission according to the retransmission sequence number (RSN) in the E-DPCCH, because the retransmission sequence number (RSN) is used to identify the corresponding TTI inner E- The number of retransmissions of data transmitted in the DPDCH, for example, if the RSN is 0, it indicates that the data is the initial transmission, and if the RSN is 1, it indicates that the data is the first time of retransmission, and so on. Therefore, the base station can determine whether the data transmitted in the E-DPDCH in the corresponding TTI is new data according to the RSN in the E-DPCCH. If it is determined that the data transmitted in the current E-DPDCH is the initial transmission, the process proceeds to step 630, otherwise, the process proceeds to step 640.

In step 630, the base station records the arrival time of the initial transmission of the data. Specifically, for each hybrid automatic retransmission HARQ process, the base station defines a variable for recording the arrival time of new data in the HARQ process and initializing the variable. For example, for each HARQ process, the base station defines a new data arrival time, the "New-Data-Arrival-Time" variable, and initializes the variable to zero. When the base station knows that the new data is transmitted in the E-DPDCH in the current TTI, the arrival time of the initial transmission of the data is recorded by saving the connection frame number and the subframe number corresponding to the TTI of the data. For the process, the connection frame number and the subframe number corresponding to the TTI of the data are stored in the "New_Data_Arrival_Time" of the HARQ process to which the data belongs, and the arrival time of the initial transmission of the data is recorded.

Next, proceeding to step 640, the base station determines whether the data of the E-DPDCH in the current TTI is correctly received. Specifically, after the base station decodes the received data correctly and sends a response ACK message, it indicates that the HARQ process to which the data belongs has successfully completed the reception of the data, and proceeds to step 650. 06 003570

-10- Otherwise, it indicates that the data has an error during transmission and needs to be retransmitted, so return to step 610.

In step 650, the base station further determines whether the SI is successfully included in the data currently received in the TTI. If SI is included, then step 660 is entered, otherwise, the process ends.

In step 660, the base station determines whether the arrival time of the initial transmission of the data including the SI is later than the reception time of the stored last SI. Specifically, the base station defines a global variable for all HARQ processes for recording the most recent SI reception time, and the global variable is initialized. For example, define a "stored SI arrival time stored_SI_Arrival_Time" variable, record the last SI reception time, and initialize the variable to zero first. For the process, when the base station includes the SI in the data successfully received in the current TTI, it is determined whether the "new data arrival time New_Data_Arrival-Time" variable of the HARQ process to which the data belongs is greater than "Stored-SI_Arrival-Time". "The last SI reception time saved in the variable. If the "New_Data_Arrival_Time" variable is greater than the "Stored_SI_Arrival_Time" variable, that is, the arrival time of the initial transmission of the data is later than the latest SI reception time, it indicates that the SI in the data is the latest SI. Proceed to step 670, otherwise, proceed to step 680.

In step 670, since the base station has learned that the SI in the data is the latest SI, the resource is scheduled according to the SI, and the reception time of the last SI is updated. Specifically, the base station sends the SI in the data to the E-DCH packet scheduling unit, and the packet scheduling unit performs resource scheduling based on the SI. The stored last SI reception time is updated to the arrival time of the initial transmission of the data. For the above process, the base station updates the "Stored_SI_Arrival-Time" variable to the "New Data Arrival Time" variable of the HARQ process of the data, that is, "Stored SI Arrival Time" is equal to "New_Data-Arrival-Time".

In step 680, since the arrival time of the initial transmission of the data is earlier than the latest SI reception time, it indicates that the SI within the data is not the latest SI. In order not to have the latest SI covered by the old SI, the base station ignores the SI within the data.

In this embodiment, the base station determines whether the received SI report is the latest SI report sent by the user terminal, ensures that the base station can obtain the latest SI report from the user terminal in time, and avoids the new SI report caused by the retransmission of the SI. The problem that may be covered by the old SI report, thus ensuring the performance of E-DCH uplink packet scheduling. 0

-11- FIG. 7 is a flowchart of a method for transmitting scheduling information in an E-DCH according to a third embodiment of the present invention, where the method includes the following steps:

When the user terminal separately transmits the scheduling information to the base station, if the user terminal has new scheduling information to be transmitted during the retransmission of the scheduling information, the user terminal stops retransmitting the separately transmitted scheduling information, and transmits the new scheduling. Information

The user terminal transmits the new scheduling information on a transmission time interval in which new scheduling information can be transmitted recently.

The specific implementation process is shown in Figure 7:

In step 710, the user terminal determines whether the SI is being transmitted separately to the base station. If yes, go to step 720, otherwise, end the process.

In step 720, the user terminal determines whether a new SI needs to be transmitted to the base station during the retransmission period of the individual transmission SI. Specifically, after the user terminal separately transmits the SI to the base station, if the unacknowledged NACK response returned by the base station is received, the separately transmitted SI needs to be retransmitted to the base station until an ACK acknowledgement response returned from the base station is received. If during this retransmission, once at least one of the following occurs, the user terminal has a new SI to be sent to the base station:

(1) The user terminal has an event specified in the SI trigger mechanism;

(2) The user terminal reaches the timing period specified in the SI trigger mechanism;

(3) When the number of remaining bits of the MAC-e PDU transmitted in a TTI is greater than or equal to 18. If the user terminal needs to send a new SI to the base station during the retransmission of the SI, the process proceeds to step 730, otherwise, the process ends.

In step 730, the user terminal immediately stops retransmitting the separately transmitted SI. Specifically, when the user terminal transmits a retransmission of the SI separately, if a new SI needs to be sent to the base station, the retransmission operation of the HARQ process of the separately transmitted SI is immediately stopped, including refreshing the HARQ process of the HARQ process. In the flush zone, the variables "current transmission number CURRENT_TX-NB" and "current retransmission sequence number CURRENT__RSN" in the HARQ process are set to zero.

Next, in step 740, the user terminal transmits the new SI on the TTI that was able to transmit the new SI recently.

In this embodiment, when the user terminal needs to send a new SI, the retransmission of the SI is separately transmitted, so that the base station can obtain the latest SI report from the user terminal in time, thereby avoiding T N2006/003570

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The retransmission of the SI results in a problem that the new SI report may be covered by the old SI report, thus ensuring the performance of the E-DCH uplink packet scheduling.

Referring to FIG. 8, FIG. 8 is a flowchart of a method for transmitting scheduling information in an E-DCH according to a fourth embodiment of the present invention. The gist of this embodiment is that, in the case that the user terminal separately transmits the SI to the base station, the HARQ retransmission process is not enabled, that is, in the case of separately transmitting the SI, if the UE receives the new data from the Node B after the first initial transmission of the new data. The NACK response message does not retransmit the old data, but directly regenerates the new SI information and performs a new transmission on the HARQ process.

The method includes: when the user terminal separately transmits the scheduling information to the base station, if the transmission fails, the retransmission of the separately transmitted scheduling information is prohibited, and the new scheduling information is transmitted at the latest transmission time interval capable of transmitting the scheduling information. The specific implementation process is shown in Figure 8:

In step 810, the user terminal receives a NACK from the Node B, indicating that the current HARQ data transmission failed.

Thereafter, in step 820, the user terminal determines whether the data of the transmission failure is a separately transmitted SI report, and if yes, proceeds to step 830, otherwise proceeds to step 840.

In step 830, the user terminal regenerates the new SI report and initiates a new transmission on the HARQ process. This ensures that the SI reports for each transfer are up to date. Of course, the SI report is not necessarily transmitted separately during retransmission. If a new MAC-e PDU needs to be transmitted at this time, the SI report can be transmitted in this MAC-e PDU.

In step 840, the HARQ retransmission process is conventionally enabled because the transmission fails with normal data.

It can be seen that the embodiment of the present invention determines whether the data received by the base station is the initial transmission by using the RSN transmitted by the E-DPCCH. If yes, the base station records the connection frame number and the subframe number corresponding to the TTI of the data. The arrival time of the initial transmission of this data. When the base station receives the data including the SI, it is determined whether the arrival time of the initial transmission of the data is later than the stored reception time of the last SI, and if yes, scheduling according to the SI in the data, and storing The reception time of the last SI is updated to the arrival time of the initial transmission of the data, otherwise, Sl in the data is ignored. Or during the retransmission of the SI transmission by the user terminal to the base station separately, if the user terminal has a new SI to transmit, the transmission of the separately transmitted SI is stopped, and the new SI is transmitted to the base station. In order to solve the transmission process in the prior art SI report, the new SI report may be old due to SI retransmission. The problem covered by the SI report enables the base station to always obtain the latest SI report from the user equipment in time, thereby realizing the performance of packet scheduling on the enhanced dedicated channel.

While the invention has been illustrated and described with reference to the preferred embodiments embodiments The spirit and scope of the invention.

Claims

Rights request

A method for transmitting scheduling information, comprising the steps of:

If the data correctly received by the base station includes scheduling information, scheduling is performed according to scheduling information in the data only when the arrival time of the data is later than the stored last scheduling information receiving time, and the scheduling is performed. The information reception time is updated to the arrival time of the data.

The method for transmitting scheduling information according to claim 1, wherein if the data correctly received by the base station includes scheduling information, and the arrival time of the data is earlier than the stored last scheduled information receiving time, The scheduling information in the data is ignored.

The method for transmitting scheduling information according to claim 1 or 2, wherein the base station determines whether the data in the corresponding transmission time interval is the initial transmission according to the retransmission sequence number in the dedicated physical control channel of the enhanced dedicated channel. .

The method for transmitting scheduling information according to claim 1 or 2, wherein the base station records the initial transmission of the data by storing a connection frame number and a subframe number corresponding to a transmission time interval of the data. Arrival time.

The method for transmitting scheduling information according to claim 1 or 2, wherein the method further comprises the steps of:

The base station initializes the scheduling information receiving time and the arrival time.

A transmission device for scheduling information, comprising:

a recording unit, configured to record an arrival time of the initial transmission of the data;

And an update unit, connected to the storage unit, configured to update a receiving time of the stored last scheduling information to an arrival time of the initial transmission of the data;

The judging unit is respectively connected to the recording unit, the storage unit, the scheduling unit and the updating unit, and is configured to determine whether the received data is the initial transmission, and if yes, notify the recording unit, and when the positive oxygen receives the digital vibration Determining whether it includes scheduling information, and if so, determining whether the arrival time of the data in the recording unit is later than the receiving time of the latest scheduling information in the storage unit, and if so, triggering the The calling unit performs scheduling according to the scheduling information, and notifies the Update the unit to update.

A method for transmitting scheduling information, comprising the steps of:

When the user terminal separately transmits the scheduling information to the base station, if the user terminal has new scheduling information to be transmitted during the retransmission of the scheduling information, the user terminal stops retransmitting the separately transmitted scheduling information, and transmits the new scheduling. information.

8. The method for transmitting scheduling information according to claim 7, wherein the method further comprises the steps of:

The method for transmitting scheduling information according to claim 7 or 8, wherein the user terminal generates an event specified in a scheduling information triggering mechanism, reaches a period specified in a triggering mechanism of the scheduling information, or passes a transmission time. When the number of remaining bits of the intermittently transmitted MAC-e protocol data unit is greater than or equal to 18, the new scheduling information needs to be transmitted.

10. A method for transmitting scheduling information, comprising the steps of:

When the user terminal separately transmits the scheduling information to the base station, if the transmission fails, the scheduling information of the separately transmitted is prohibited from being retransmitted, and the new scheduling information is transmitted at the latest transmission time interval capable of transmitting the scheduling information.