WO2010048866A1

WO2010048866A1 - Method and device for sending signals

Info

Publication number: WO2010048866A1
Application number: PCT/CN2009/074595
Authority: WO
Inventors: 潘学明; 丁昱; 宋月霞; 索士强
Original assignee: 大唐移动通信设备有限公司
Priority date: 2008-10-31
Filing date: 2009-10-23
Publication date: 2010-05-06

Abstract

A method for sending signals is disclosed in the present invention. When a Time Division Duplex (TDD) frequency band corresponding to a TDD system and a Frequency Division Duplex (FDD) frequency band corresponding to a FDD system are adjacent, a guard band is set between the TDD frequency band and the FDD frequency band; during the period that sending directions of signals in the TDD frequency band and the FDD frequency band are consistent, the FDD system or TDD system utilizes the guard band to send the signals; during the period that sending directions of signals in the TDD frequency band and the FDD frequency band are not consistent, none of the signals is received/sent in the guard band. Two kinds of signal sending devices are disclosed in the present invention at the same time. The utilization ratio of frequency resources can be better improved by applying the method and device of the present invention.

Description

Signal transmitting method and device

Technical field

The present invention relates to mobile communication technologies, and in particular, to a signal transmission method and apparatus when a time division duplex (TDD) system and a frequency division duplex (FDD) system are adjacent to a frequency band. Background of the invention

According to the current spectrum resource allocation method, the TDD frequency band corresponding to the TDD system is adjacent to the FDD frequency band corresponding to the FDD system, specifically, the TDD frequency band is adjacent to the FDD downlink frequency band, and the TDD frequency band and the FDD uplink are present. The frequency band is adjacent to both cases. At this point, it is necessary to use certain measures to solve the cross interference problem that may occur between the two.

Figure 1 is a schematic diagram of a solution when the TDD band is adjacent to the FDD downlink band. As shown in FIG. 1 , in order to prevent cross interference between the uplink signal in the TDD frequency band and the downlink signal in the FDD downlink frequency band, a certain bandwidth is reserved between the TDD frequency band and the FDD downlink frequency band as a protection band. No signal is sent or received inside.

Figure 2 is a schematic diagram of the solution when the TDD band is adjacent to the FDD uplink band. As shown in FIG. 2, in order to prevent cross interference between the downlink signal in the TDD frequency band and the uplink signal in the FDD uplink frequency band, a certain bandwidth is reserved between the TDD frequency band and the FDD uplink frequency band as a protection band. No signal is sent or received inside.

Although the above method can better solve the cross interference problem that may occur when the TDD frequency band is adjacent to the FDD frequency band, there are certain problems in this mode, as shown in FIG. 1 : When the signal is transmitted in the TDD frequency band When it is a downlink signal, there is no cross interference between the signal and the downlink signal in the downlink frequency band of the FDD, that is, in this case, It does not make much sense to set the protection band; however, in the existing mode, the protection band will always exist regardless of whether the uplink or downlink signal is transmitted in the TDD band, and no signal transmission and reception is allowed in the protection band. This results in a waste of resources, which reduces the utilization of frequency resources. Summary of the invention

In view of the above, it is a primary object of the present invention to provide a signal transmission method capable of improving frequency resource utilization.

Another object of the present invention is to provide two types of signal transmitting apparatuses capable of improving frequency resource utilization.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A signal transmitting method, when the TDD frequency band corresponding to the duplex TDD system is adjacent to the FDD frequency band corresponding to the frequency division duplex FDD system, in the TDD frequency band and the

A guard band is set between the FDD bands, and the method further includes:

The protection band is used for signal transmission by one of the FDD system and the TDD system during a period in which the TDD band coincides with a signal transmission direction in the FDD band.

A signal transmitting device, the device further comprising:

a first determining unit, configured to determine whether a TDD frequency band corresponding to the time division duplex TDD system is adjacent to a frequency division duplex FDD frequency band corresponding to the time division, and if yes, notifying the first sending unit to perform its own function;

The first sending unit is configured to receive a notification message from the first determining unit, and in a time period in which the TDD frequency band is consistent with a signal sending direction in the FDD frequency band, a signal sending device, The device includes: a second determining unit, configured to determine whether an FDD frequency band corresponding to the frequency division duplex FDD system is adjacent to a time division duplex TDD frequency band corresponding thereto, and if yes, notify the second sending unit to perform its own function;

The second sending unit is configured to receive a notification message from the second determining unit, and in a time period in which the TDD frequency band is consistent with a signal sending direction in the FDD frequency band, The technical solution does not perform any signal transmission and reception in the protection band as in the prior art, but in the time period in which the signal transmission direction in the TDD frequency band and the FDD frequency band is consistent, since there is no need to consider the intersection of the uplink and downlink signals at this time. The interference problem, that is, there is no need to set the guard band, so the protection band is used by the TDD system or the FDD system, and the signal is transmitted by using the signal, and the signal transmission direction in the TDD band and the FDD band is inconsistent, due to this It is necessary to set protection to avoid cross interference between the uplink and downlink signals, so the original protection band is kept unchanged, that is, no signal is transmitted and received in the protection band, thereby improving the utilization of frequency resources. BRIEF DESCRIPTION OF THE DRAWINGS

The above-described and other features and advantages of the present invention will become more apparent to those skilled in the <

FIG. 1 is a schematic diagram of a solution when the TDD frequency band is adjacent to the FDD downlink frequency band; FIG. 2 is a schematic diagram of a solution when the TDD frequency band is adjacent to the FDD uplink frequency band; FIG. 3 is the first signaling method of the present invention. Flow chart of an embodiment;

4 is a schematic diagram of a manner of using a guard band in a first embodiment of the method according to the present invention; FIG. 5 is a schematic diagram of a signal transmitting manner in a first embodiment of the method according to the present invention;

6 is a flowchart of a second embodiment of a signal transmitting method according to the present invention;

Figure Ί is a schematic diagram of the use of the protective tape in the second embodiment of the method of the present invention; FIG. 8 is a schematic diagram of a signal transmission manner in a second embodiment of the method according to the present invention; FIG.

9 is a schematic structural diagram of a first embodiment of a signal transmitting apparatus according to the present invention; FIG. 10 is a schematic diagram of a manner of using a guard band in a third embodiment of the method according to the present invention; FIG. 12 is a schematic structural diagram of a second embodiment of a signal transmitting apparatus according to the present invention. Mode for carrying out the invention

In order to solve the problems in the prior art, the present invention proposes a signal transmission method when the frequency bands are adjacent. When the TDD frequency band corresponding to the TDD system is adjacent to the FDD frequency band corresponding to the FDD system, the prior art will be The guard band set between the TDD band and the FDD band is used for the FDD system or the TDD system to perform single-direction signal transmission in a part of time, thereby improving the utilization of frequency resources. The specific implementation includes: using the protection band to perform signal transmission by the FDD system or the TDD system in a time period in which the TDD frequency band and the FDD frequency band are in the same direction; and the signal transmission direction in the TDD frequency band and the FDD frequency band is inconsistent. During the time period, processing can be performed in an existing manner, that is, no signal is transmitted or received in the guard band.

The present invention will be further described in detail below with reference to the accompanying drawings.

The following is a description of the specific implementation of the signal transmission by the FDD system during the time period in which the signal transmission direction in the TDD band and the FDD band is consistent.

In this way, the FDD system needs to know the uplink and downlink configuration information of the TDD system in advance, that is, during which time period the TDD system will send the uplink signal, and during which time period, the downlink signal will be sent, so that the FDD system can determine the information according to the information. Which time periods are the time periods in which the TDD frequency band is consistent with the signal transmission direction in the FDD frequency band, and which are the time periods in which the signal transmission directions in the TDD frequency band and the FDD frequency band are inconsistent. 3 is a flow chart of a first embodiment of a signal transmitting method of the present invention. It is assumed that the FDD frequency band in this embodiment is the FDD downlink frequency band. As shown in Figure 3, the following steps are included:

Step 301: The FDD system acquires uplink and downlink configuration information of the TDD system.

The specific acquisition manner may be: the FDD system receives and saves the uplink and downlink configuration information of the manually input TDD system; or, through the pre-defined interface between the FDD system and the TDD system, the FDD system receives and saves the uplink and downlink configuration sent by the TDD system. information. Of course, this is only an example. If you use other methods, you can achieve the same purpose.

Step 302: The FDD system determines, according to the obtained uplink and downlink configuration information of the TDD system, a time period in which the TDD system uses the TDD frequency band to transmit the downlink signal and a time period in which the uplink signal is sent.

For a TDD system, it may use the TDD frequency band to transmit downlink signals during a certain period of time, and in the next time period, it may use the TDD frequency band to transmit uplink signals. In this step, the FDD system determines, according to the uplink and downlink configuration information of the acquired TDD system, which time periods are the time periods in which the TDD system uses the TDD frequency band for uplink signal transmission, and which time periods are used by the TDD system to use the TDD frequency band for downlink. The time period during which the signal was sent.

Step 303: During a period in which the TDD system uses the TDD frequency band to transmit the downlink signal, the FDD system uses the guard band set between the TDD frequency band and the FDD frequency band to perform downlink signal transmission; and the TDD system uses the TDD frequency band to perform uplink signal transmission time. In the segment, no signal is transmitted or received in the guard band.

Since the FDD frequency band in this embodiment is the FDD downlink frequency band, the signal transmission direction in the FDD frequency band and the TDD frequency band is consistent during the time period in which the TDD system uses the TDD frequency band for downlink signal transmission, that is, two paths. There is no cross interference between the signals. In this case, the protection band between the TDD band and the FDD band is not If there is too much meaning, it will cause waste of frequency resources. Therefore, in this embodiment, during the time period in which the TDD system uses the TDD frequency band to transmit downlink signals, the FDD system utilizes the protection band and uses it. The transmission of the downlink signal. In the time period when the TDD system uses the TDD frequency band for uplink signal transmission, the direction of signal transmission in the FDD frequency band and the TDD frequency band is inconsistent, that is, there is a cross interference problem between the two signals, then in this case The guard band set between the TDD band and the FDD band needs to be retained, and no signal transmission or reception is allowed in the guard band.

The specific implementation of the step 303 will be further described in detail below with reference to the accompanying drawings. FIG. 4 is a schematic diagram of the use of the guard band in the first embodiment of the method of the present invention. It can be seen intuitively from Figure 4 that during the time period in which the TDD system uses the TDD frequency band for downlink signal transmission, the FDD system uses the guard band for downlink signal transmission; and the TDD system uses the TDD frequency band for uplink signal transmission time. In the segment, the protective tape will play the same role as in the prior art and will not be occupied.

Further, FIG. 5 is a schematic diagram of a signal transmission manner in the first embodiment of the method according to the present invention. Among them, fl, and β respectively correspond to the TDD frequency band, the guard band and the FDD downlink frequency band; fl and the upper small blocks respectively represent different time segments; and the small blocks marked by the dotted lines on f2 indicate that no signal is sent or received. segment. As shown in FIG. 5, in the TDD frequency band, it is assumed that the signal transmission is performed in a downlink and uplink manner. It is obvious that the time period in which the TDD system uses the TDD frequency band for uplink signal transmission will correspond to the small line indicated by the dotted line in G. Piece.

When the FDD system uses the guard band for signal transmission, the frequency band occupied by the guard band can be used together with other FDD frequency bands corresponding to the FDD system, such as β, that is, together as the downlink available bandwidth of the FDD system. Thus, during certain time periods (ie, the time period during which the TDD system uses the TDD band for downlink signal transmission), the downlink available bandwidth of the FDD system will Greater than the uplink available bandwidth, thus forming an uplink and downlink asymmetric transmission bandwidth; in other words, if each frequency band is called a carrier, then the number of available downlink carriers of the FDD system (guard band plus FDD) in certain time periods The frequency band) will be greater than the number of available upstream carriers. Thus, for some scenarios that require a large downlink bandwidth, the present invention provides a better solution.

6 is a flow chart of a second embodiment of a signal transmitting method according to the present invention. It is assumed that the FDD frequency band in this embodiment is the FDD uplink frequency band. As shown in Figure 6, the following steps are included:

Step 601: The FDD system obtains uplink and downlink configuration information of the TDD system.

Step 602: The FDD system determines, according to the obtained uplink and downlink configuration information of the TDD system, a time period in which the TDD system uses the TDD frequency band to transmit the downlink signal and a time period in which the uplink signal is sent.

The specific implementation of steps 601 ~ 602 is the same as the specific implementation of steps 301 ~ 302, and will not be described again.

Step 603: During a time period in which the TDD system uses the TDD frequency band to perform uplink signal transmission, the FDD system uses the guard band set between the TDD frequency band and the FDD frequency band to perform uplink signal transmission; when the TDD system uses the TDD frequency band to perform downlink signal transmission time In the segment, no signal is transmitted or received in the guard band.

Since the FDD frequency band in this embodiment is the FDD uplink frequency band, the signal transmission direction in the FDD frequency band and the TDD frequency band is consistent during the time period in which the TDD system uses the TDD frequency band for uplink signal transmission, that is, two paths. There is no cross interference between the signals. In this case, the guard band set between the TDD frequency band and the FDD frequency band does not have much significance, and the frequency resource is wasted. Therefore, in this embodiment, the TDD system uses the TDD frequency band for uplink signal transmission. During the time period, the protection band is utilized by the FDD system to transmit the uplink signal. In the time period when the TDD system uses the TDD frequency band for downlink signal transmission, the FDD frequency band and the TDD frequency band The signal transmission direction is inconsistent, that is, there is a cross interference problem between the two signals. In this case, the protection band between the TDD frequency band and the FDD frequency band needs to be retained, in the protection band. No signal transmission or reception is allowed inside.

The specific implementation of this step will be further described in detail below with reference to the accompanying drawings: FIG. 7 is a schematic diagram of the use of the protective tape in the second embodiment of the method of the present invention. It can be seen intuitively from Figure 7 that during the time period in which the TDD system uses the TDD frequency band for uplink signal transmission, the FDD system uses the guard band for uplink signal transmission; and the TDD system uses the TDD frequency band for downlink signal transmission time. In the segment, the protective tape will play the same role as in the prior art and will not be occupied.

Further, FIG. 8 is a schematic diagram of a signal transmission manner in a second embodiment of the method according to the present invention. Among them, f4, f5 and f6 represent the TDD frequency band, the guard band and the FDD uplink frequency band respectively; the small blocks on f4 and f5 respectively represent different time periods; and the small blocks marked by the dotted lines on f5 indicate that no signal is performed. The time period for sending and receiving. As shown in Figure 8, in the TDD frequency band, it is assumed that the signal transmission is performed in a downlink or uplink manner. It is obvious that the time period in which the TDD system uses the TDD frequency band for downlink signal transmission in f4 will correspond to the small line indicated by the dotted line in f5. Piece.

Similarly, since the uplink resources on f5 are discontinuous in time, in practical applications, when the FDD system uses the guard band for signal transmission, the frequency band occupied by the guard band and other corresponding to the FDD system may be used. FDD bands, such as f6, are used together. In this way, in some time periods, the uplink available bandwidth of the FDD system will be greater than the downlink available bandwidth, thereby forming an uplink and downlink asymmetric transmission bandwidth; in other words, if each frequency band is referred to as a carrier, then in some During the time period, the number of available uplink carriers of the FDD system will be greater than the number of available downlink carriers.

Based on the above method, FIG. 9 is a schematic structural diagram of a first embodiment of a signal transmitting apparatus according to the present invention. As shown in Figure 9, the device includes: The first determining unit 91 is configured to determine whether the TDD frequency band corresponding to the TDD system is adjacent to the FDD frequency band corresponding to the TDD frequency band, and if yes, notify the first sending unit 92 to perform its own function; otherwise, perform processing according to an existing manner;

The first sending unit 92 is configured to receive the notification message from the first determining unit 91, and use the protection band disposed between the TDD frequency band and the FDD frequency band in a time period in which the TDD frequency band and the signal transmission direction in the FDD frequency band are consistent. The signal is sent; the unit is further configured to perform no signal transmission and reception in the guard band during a period in which the signal transmission direction in the TDD frequency band and the FDD frequency band are inconsistent.

The first sending unit 92 may specifically include:

The first receiving subunit 921 is configured to receive the notification message from the first determining unit 91, and notify the first sending subunit 922 to perform its own function when the FDD frequency band is the FDD downlink frequency band, when the FDD frequency band is When the FDD uplink frequency band is notified, the second sending subunit 923 is notified to perform its own function;

The first sending subunit 922 is configured to receive the notification message from the first receiving subunit 921, and use the guard band to perform downlink signal transmission during the time period in which the TDD system uses the TDD frequency band to perform downlink signal transmission, and utilize TDD in the TDD system. During the time period in which the frequency band transmits the uplink signal, no signal is transmitted or received in the guard band;

The second sending subunit 923 is configured to receive the notification message from the first receiving subunit 921, and use the guard band to perform uplink signal transmission during the time period in which the TDD system uses the TDD frequency band to perform uplink signal transmission, and utilize TDD in the TDD system. During the time period in which the frequency band transmits the downlink signal, no signal is transmitted or received in the guard band.

In addition, the first sending unit 92 may further include:

The obtaining subunit 924 is configured to obtain uplink and downlink configuration information of the TDD system, and notify the first sending subunit 922 and the second sending subunit 923;

The first transmitting subunit 922 and the second transmitting subunit 923 are based on the received TDD system The uplink and downlink configuration information of the system is used to know the time period during which the TDD system transmits the downlink signal by using the TDD frequency band and the time period during which the uplink signal is transmitted.

The following describes a specific implementation manner in which the TDD system uses the guard band for signal transmission in a time period in which the TDD band and the FDD band are in the same direction of signal transmission.

For a TDD system, it may use the TDD frequency band to transmit downlink signals during a certain period of time, and in the next time period, it may use the TDD frequency band to transmit uplink signals. Obviously, for the TDD system itself, when it uses its TDD band for downlink signal transmission, it is known when to use the TDD band for uplink signal transmission.

Method third embodiment

It is assumed that the FDD frequency band in this embodiment is the FDD downlink frequency band. Then, in the time period in which the TDD system uses the TDD frequency band for downlink signal transmission, the signal transmission direction in the FDD frequency band and the TDD frequency band will be the same, that is, two There is no cross interference problem between the road signals. In this case, the guard band set between the TDD band and the FDD band does not have much significance, and the frequency resource is wasted. Therefore, in this embodiment, the TDD system uses the TDD band for downlink signal transmission. During the time period, the protection band is utilized by the TDD system, and the downlink signal is transmitted. In the time period when the TDD system uses the TDD frequency band for uplink signal transmission, the direction of signal transmission in the FDD frequency band and the TDD frequency band is inconsistent, that is, there is a cross interference problem between the two signals, then in this case The guard band set between the TDD band and the FDD band needs to be retained, and no signal transmission or reception is allowed in the guard band.

The specific implementation of the embodiment will be further described in detail below with reference to the accompanying drawings: FIG. 10 is a schematic diagram of the use of the protection band in the third embodiment of the method of the present invention. It can be seen intuitively from FIG. 10 that during the time period in which the TDD system uses the TDD frequency band for downlink signal transmission, the TDD system simultaneously uses the guard band to transmit the downlink signal; and in the TDD. During the time period during which the system uses the TDD frequency band for uplink signal transmission, the protection band will play the same role as in the prior art and will not be occupied.

The specific signal transmission method is shown in Figure 5. Among them, fl, and β respectively correspond to the TDD frequency band, the guard band and the FDD downlink frequency band; the small blocks on fl and f2 respectively represent different time segments; and the small blocks marked on the upper dotted line indicate the time when no signal is sent or received. segment. As shown in FIG. 5, in the TDD frequency band, it is assumed that the signal transmission is performed according to the downlink and uplink alternate manners. Obviously, the time period in which the TDD system uses the TDD frequency band for uplink signal transmission will correspond to the small line indicated by the dotted line in G. Piece. To use the band occupied by the guard band and other TDD bands corresponding to the TDD system, such as fl ? Used together, together as the downlink available bandwidth. In this way, during certain time periods (ie, the time period during which the TDD system uses the TDD frequency band for downlink signal transmission), the downlink available bandwidth of the TDD system will be greater than the uplink available bandwidth, thereby forming an uplink and downlink asymmetric transmission bandwidth; If each frequency band is called a carrier, then the number of available downlink carriers (protection band and TDD band) of the TDD system will be greater than the number of available uplink carriers in some time periods. Thus, for some scenarios that require a large downlink bandwidth, the present invention provides a better solution.

Method fourth embodiment

It is assumed that the FDD frequency band in this embodiment is the FDD uplink frequency band. Then, in the time period in which the TDD system uses the TDD frequency band for uplink signal transmission, the signal transmission direction in the FDD frequency band and the TDD frequency band will be the same, that is, There is no cross interference problem between the two signals. In this case, the guard band set between the TDD band and the FDD band does not have much significance, and the frequency resource is wasted. Therefore, in this embodiment, the TDD system uses the TDD band for uplink signals. During the transmission period, the protection band is utilized by the TDD system to transmit the uplink signal. And in the TDD department During the time period in which the TDD frequency band is used for downlink signal transmission, the signal transmission direction in the FDD frequency band and the TDD frequency band is inconsistent, that is, there is a cross interference problem between the two signals, and in this case, the TDD is set in the TDD. The guard band between the frequency band and the FDD band needs to be retained, and no signal transmission or reception is allowed in the guard band.

The specific implementation of the embodiment will be further described in detail below with reference to the accompanying drawings. FIG. 11 is a schematic diagram of the use of the protection band in the fourth embodiment of the method of the present invention. It can be seen intuitively from FIG. 11 that during the time period in which the TDD system uses the TDD frequency band for uplink signal transmission, the TDD system simultaneously uses the guard band to transmit the uplink signal; and the TDD system uses the TDD frequency band to perform the downlink signal transmission. During the time period, the protective tape will play the same role as in the prior art and will not be occupied.

The specific signal transmission method is shown in Figure 8. Where f4, f5 and f6 correspond to the TDD frequency band, the guard band and the FDD uplink frequency band respectively; the small blocks on f4 and f5 respectively represent different time periods; and the small blocks marked by the dotted lines on f5 indicate that no signal is performed. The time period for sending and receiving. As shown in Figure 8, in the TDD frequency band, it is assumed that the signal transmission is performed in the manner of downlink and uplink alternates. Obviously, the time period in which the TDD system uses the TDD frequency band for downlink signal transmission in f4 will correspond to the small line marked by the dotted line in f5. Piece.

Similarly, since the uplink resources on f5 are discontinuous in time, in practical applications, the frequency band occupied by the guard band can be used together with other TDD bands corresponding to the TDD system, such as f4. Thus, in some time periods, the uplink available bandwidth of the TDD system will be greater than the downlink available bandwidth, thereby forming an uplink and downlink asymmetric transmission bandwidth; in other words, if each frequency band is referred to as a carrier, then in some During the time period, the number of available uplink carriers of the TDD system will be greater than the number of available downlink carriers.

FIG. 12 is a schematic structural diagram of a second embodiment of a signal transmitting apparatus according to the present invention. As shown in Figure 12, the device includes:

a second determining unit 121, configured to determine an FDD frequency band corresponding to the FDD system and itself Whether the corresponding TDD frequency band is adjacent, if yes, notifying the second sending unit 122 to perform its own function; if not, processing according to the existing manner;

The second sending unit 122 is configured to receive the notification message from the second determining unit 121, and use a protection band disposed between the TDD frequency band and the FDD frequency band in a time period in which the TDD frequency band and the signal transmission direction in the FDD frequency band are consistent. The signal is sent; the unit is further configured to perform no signal transmission and reception in the guard band during a period in which the signal transmission direction in the TDD frequency band and the FDD frequency band are inconsistent.

The second sending unit 122 may specifically include:

The second receiving sub-unit 1221 is configured to receive the notification message from the second determining unit 121, and notify the third sending sub-unit 1222 to perform its own function when the FDD frequency band is the FDD downlink frequency band, when the FDD frequency band is the FDD uplink frequency band. Notifying the fourth sending subunit 1223 to perform its own function;

The third sending sub-unit 1222 is configured to receive the notification message from the second receiving sub-unit 1221, and use the guard band to perform downlink signal transmission during the time period in which the downlink signal is transmitted by using the TDD frequency band, and perform uplinking by using the TDD frequency band. During the time period in which the signal is transmitted, no signal is transmitted or received in the guard band;

The fourth sending sub-unit 1223 is configured to receive the notification message from the second receiving sub-unit 1221, and use the guard band to perform uplink signal transmission during the time period of using the TDD frequency band for uplink signal transmission, and perform downlinking by using the TDD frequency band. During the time period in which the signal is transmitted, no signal is transmitted or received in the guard band.

For the specific working process of the device shown in FIG. 9 and FIG. 12, refer to the description in the corresponding method embodiment, and details are not described herein again.

In summary, the technical solution of the present invention does not perform any signal transmission and reception in the guard band as in the prior art, but in a time period in which the signal transmission direction in the TDD frequency band and the FDD frequency band coincides, There is no need to consider the cross-interference problem of the uplink and downlink signals, that is, no It is necessary to set the guard band, so the FDD system or the TDD system uses the guard band to transmit the signal, and in the time period when the signal transmission direction in the TDD band and the FDD band is inconsistent, the protection needs to be set at this time. It avoids cross interference between the uplink and downlink signals, so the original protection band is kept unchanged, that is, no signal is transmitted and received in the protection band, so that the cross interference problem between the uplink and downlink signals is solved, and it is better. The ground has improved the utilization of frequency resources.

Moreover, the solution of the present invention can be applied to any TDD system and FDD system. For example, the TDD system can be Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), time division- TD-CDMA (Time Division-Code Division Multiple Access), Long Term Evolution-Time Division Duplex (LTE-TDD) or Global Interoperability (Wimax, World Interoperability) For Microwave Access, etc., the FDD system may be Wideband Code Division Multiple Access (WCDMA) or Long Term Evolution-Frequency Division Duplex (LTE-FDD), etc. The possible situations are no longer enumerated.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

1. A signal transmission method, when a TDD frequency band corresponding to a duplex TDD system is adjacent to an FDD frequency band corresponding to a frequency division duplex FDD system, a protection is set between the TDD frequency band and the FDD frequency band. The belt is characterized in that the method further comprises:

2. The method according to claim 1, wherein the method further comprises: not performing any of the protection bands in a period in which the TDD frequency band is inconsistent with a signal transmission direction in the FDD frequency band. Signal transmission and reception.

The method according to claim 1 or 2, wherein the time period in which the TDD frequency band is consistent with the signal transmission direction in the FDD frequency band comprises:

When the FDD frequency band is an FDD downlink frequency band, the TDD system uses the TDD frequency band to perform a downlink signal transmission time period;

When the FDD frequency band is an FDD uplink frequency band, the TDD system uses the TDD frequency band to perform an uplink signal transmission time period;

The time period in which the TDD frequency band is inconsistent with the signal transmission direction in the FDD frequency band includes:

When the FDD frequency band is an FDD downlink frequency band, the TDD system uses the TDD frequency band to perform an uplink signal transmission time period;

When the FDD frequency band is an FDD uplink frequency band, the TDD system uses the TDD frequency band to perform a downlink signal transmission time period.

4. The method according to claim 1, wherein if the protection band is used for signal transmission by the FDD system, the method includes: When the FDD frequency band is an FDD downlink frequency band, the FDD system aggregates the protection band and the FDD frequency band together as a downlink available bandwidth, and uses the downlink available bandwidth to perform downlink signal transmission; or The FDD system uses the protection band and the FDD frequency band as one carrier respectively, and uses the two carriers together as an available downlink carrier, and uses the available downlink carrier to perform downlink signal transmission;

When the FDD frequency band is an FDD uplink frequency band, the FDD system aggregates the protection band and the FDD frequency band together as an uplink available bandwidth, and uses the uplink available bandwidth to perform uplink signal transmission; or The FDD system uses the protection band and the FDD frequency band as one carrier respectively, and uses the two carriers together as an available uplink carrier, and uses the available uplink carrier to perform uplink signal transmission.

5. The method according to claim 4, further comprising: before the signal is transmitted by the FDD system using the guard band, further comprising:

The FDD system acquires the uplink and downlink configuration information of the TDD system, and determines, according to the uplink and downlink configuration information of the TDD system, a time period in which the TDD frequency band is consistent with a signal transmission direction in the FDD frequency band, and the TDD frequency band. A period of time that is inconsistent with the direction in which the signal is transmitted in the FDD band.

The method of claim 5, wherein the acquiring, by the FDD system, the uplink and downlink configuration information of the TDD system includes:

The FDD system receives and stores the uplink and downlink configuration information of the manually input TDD system;

Alternatively, the FDD system receives and saves uplink and downlink configuration information sent by the TDD system.

The method according to claim 1, wherein if the protection band is used for signaling by the TDD system, the method includes:

When the TDD frequency band is a TDD downlink frequency band, the TDD system will perform the protection The TDD frequency band corresponding to the band is aggregated together as the downlink available bandwidth, and the downlink available bandwidth is used for downlink signal transmission; or the TDD system uses the guard band and the TDD frequency band as one carrier respectively. And using the two carriers together as an available downlink carrier, and using the available downlink carrier to perform downlink signal transmission;

When the TDD frequency band is a TDD uplink frequency band, the TDD system aggregates the protection band and the TDD frequency band corresponding to the TDD frequency band together as an uplink available bandwidth, and uses the uplink available bandwidth to perform uplink signal transmission; or The TDD system uses the guard band and the TDD frequency band as one carrier respectively, and uses the two carriers together as an available uplink carrier, and uses the available uplink carrier to perform uplink signal transmission.

8. Method according to claim 1 or 2, characterized in that

The FDD system includes: a wideband code division multiple access WCDMA system and a long term evolution-frequency division duplex LTE-FDD system;

The TDD system includes: a time division-synchronous code division multiple access TD-SCDMA system, a time division-code division multiple access TD-CDMA system, a long term evolution-time division duplex LTE-TDD system, and a start-up access global interworking network Wimax system.

9. A signal transmitting apparatus, characterized in that: further comprising:

The first sending unit is configured to receive a notification message from the first determining unit, and send the time period in which the TDD frequency band is consistent with a signal sending direction in the FDD frequency band.

The device according to claim 9, wherein the first sending unit is further configured to: send signals in different directions in the TDD frequency band and the FDD frequency band. During the period of time, no signal is transmitted or received within the guard band.

The device according to claim 10, wherein the first sending unit comprises:

a first receiving subunit, configured to receive a notification message from the first determining unit, and notify the first sending subunit to perform its own function when the FDD frequency band is an FDD downlink frequency band, when the FDD frequency band is an FDD In the uplink frequency band, notifying the second sending subunit to perform its own function;

The first sending subunit is configured to receive a notification message from the first receiving subunit, and use the protection band to perform downlink in a period in which the TDD system uses the TDD frequency band to perform downlink signal transmission. Signal transmission, during the time period in which the TDD system uses the TDD frequency band to perform uplink signal transmission, no signal is transmitted or received in the protection band;

The second sending subunit is configured to receive a notification message from the first receiving subunit, and use the protection band to perform uplink in a time period during which the TDD system uses the TDD frequency band to perform uplink signal transmission. Signal transmission, in the time period during which the TDD system transmits the downlink signal by using the TDD frequency band, no signal is transmitted or received in the protection band.

The device according to claim 11, wherein the first sending unit further comprises:

Obtaining a subunit, configured to acquire uplink and downlink configuration information of the TDD system, and notify the first sending subunit and the second sending subunit;

The first sending sub-unit and the second sending sub-unit are configured to learn, according to the received uplink and downlink configuration information of the TDD system, a time period in which the TDD system uses the TDD frequency band to perform downlink signal transmission, and perform an uplink signal. The time period sent.

13. A signal transmitting apparatus, the apparatus comprising: a second determining unit, configured to determine whether an FDD frequency band corresponding to the frequency division duplex FDD system is adjacent to a time division duplex TDD frequency band corresponding thereto, and if yes, notify the second sending unit to perform its own function;

The second sending unit is configured to receive a notification message from the second determining unit, and send the time period in which the TDD frequency band is consistent with a signal sending direction in the FDD frequency band.

The device according to claim 13, wherein the second sending unit is further configured to: during the period in which the TDD frequency band is inconsistent with a signal sending direction in the FDD frequency band, in the protection No signal is sent or received in the band.

The device according to claim 14, wherein the second sending unit comprises:

a second receiving subunit, configured to receive a notification message from the second determining unit, and notify the third sending subunit to perform its own function when the FDD frequency band is an FDD downlink frequency band, when the FDD frequency band is an FDD In the uplink frequency band, the fourth transmitting subunit is notified to perform its own function;

The third sending subunit is configured to receive a notification message from the second receiving subunit, and simultaneously use the protection band to perform downlink signal transmission in a time period in which the downlink signal is sent by using the TDD frequency band, During the period of uplink signal transmission using the TDD frequency band, no signal is transmitted or received in the protection band;

The fourth sending subunit is configured to receive a notification message from the second receiving subunit, and simultaneously use the protection band to perform uplink signal transmission in a time period in which the TDD frequency band is used for uplink signal transmission, During the period of downlink signal transmission using the TDD frequency band, no signal is transmitted or received in the guard band.