CN102244850B

CN102244850B - Method, device and system for transmitting and detecting control signal of return link

Info

Publication number: CN102244850B
Application number: CN201010175392.7A
Authority: CN
Inventors: 王立波; 沈祖康; 潘学明; 肖国军; 张文健
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2010-05-12
Filing date: 2010-05-12
Publication date: 2014-08-06
Anticipated expiration: 2030-05-12
Also published as: CN102244850A

Abstract

The invention discloses a method, a device and a system for transmitting and detecting a control signal of a return link for realizing correct detection on the relay link-physical downlink shared channel (R-PDSCH) data position. The detecting method comprises the following steps: a relay node determines whether R-PDSCH data is transmitted in the current uplink resource schedule signaling carrying area, if so, the R-PDSCH data is detected in the current uplink resource schedule signaling carrying area; and otherwise, uplink resource schedule signaling is detected in the current uplink resource schedule signaling area.

Description

Method, device and system for transmitting and detecting backhaul link control signaling

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for transmitting and detecting backhaul link control signaling.

Background

Fig. 1 shows a network structure of a long term evolution-advanced (LTE-a) system. In an LTE-a system, a base station (eNB) is connected to a Core Network (CN) through a wired interface; a Relay Node (RN) connected to the eNB via a wireless interface; user Equipment (UE) is connected to the RN or eNB through a wireless interface. The link from the relay node to the eNB is a backhaul link, and includes an uplink backhaul link and a downlink backhaul link. And a link between the RN and the UE is an access link and comprises an uplink access link and a downlink access link.

In the backhaul link, there are two channels, a control channel (R-PDCCH) and a shared data channel (R-PDSCH) that transmit information to the relay node.

The inventor has found in research that two situations may occur in the multiplexing mode of the two channels, as shown in fig. 2 and fig. 3. Fig. 2 is a schematic diagram of transmission in a TDM + FDM multiplexing manner. Fig. 3 is a schematic diagram of transmission by FDM multiplexing. The TDM + FDM multiplexing mode mainly focuses on the problem of controlling the signaling demodulation delay, and the FDM multiplexing mode focuses on the simplicity of pilot configuration and the flexibility of the multiplexing mode.

At present, a compromise scheme is mainly used, and the basic principle of the scheme is as follows:

1) a downlink resource scheduling signaling (DL grant) is configured in a first time slot, namely, the short time delay of the signaling demodulation is ensured, and the timely demodulation of corresponding downlink data information is ensured;

2) uplink resource scheduling signaling (UL grant) may be configured in the second slot within the corresponding PRB pair. Fig. 4 is a diagram illustrating a possible multiplexing scheme of DL grant and UL grant.

When the downlink resource allocation is allocated with resource allocation type0 and type 1, its resources are allocated to the terminal in the form of Resource Block Groups (RBGs). That is, a plurality of Resource Blocks (RBs) are grouped and allocated to a terminal in a group. Similarly, for the relay, the base station may transmit the downlink R-PDCCH and the R-PDSCH to the relay in the form of RBG.

When the base station allocates an RBG to the relay in the form of an RBG, and the first RB in the RBG transmits information of a DL grant. As shown in fig. 5, wherein the RBG includes 4 RBs. The base station semi-statically informs the relay, the first RB in the RBG is used for transmitting the DL grant, and the PRB pair where the DL grant is located may or may not transmit the UL grant in the second time slot. And the resource location of the R-PDSCH of the relay is dynamically or semi-statically indicated by the DL grant. However, since resource locations of the R-PDSCH are also allocated based on the RBG, the DL grant only indicates that the R-PDSCH exists in the RBG, and its effective region is actually a region other than the DL grant and the UL grant.

Thus, if the base station transmits the UL grant in the UL grant region, and if the relay detects the UL grant, the relay assumes that the base station has not transmitted the UL grant to itself if the detection is erroneous, and thus the region range of the R-PDSCH detected by the relay will include the resource region of the UL grant. This results in an error in the resource location of the R-PDSCH, and thus directly results in an error in decoding the R-PDSCH, and performs retransmission.

Fig. 5 is a diagram illustrating a DL grant and a UL grant configured in a RBG. The case of fig. 5 is where the R-PDCCH control information in the RBG is dedicated to a relay, and this is generally the case of demodulation using a demodulation pilot (DMRS).

When demodulation is performed using a common pilot (CRS), DL grants and UL grants of multiple RNs are transmitted in a certain RBG, and interleaving may be performed between the DL grants and the UL grants in order to improve detection performance by using frequency diversity gain. Fig. 6 is a schematic diagram of configuring DL grant and UL grant in multiple RBGs, as shown in fig. 6, where multiple relayed DL grant and UL grant information are configured in two RBGs, in this case, since there are UL grants of multiple RNs, even if a certain RN cannot detect its own UL grant, the region cannot be R-PDSCH because there may be UL grants of other RNs.

However, there is another possible case where all the UL grants of the RN in the second slot are not transmitted, but a certain relayed R-PDSCH is transmitted. At this time, the behavior of the RN is exactly the same as before, and since the RBG occupied by the R-PDSCH is the same as the DL grant, the RBG occupied by the R-PDSCH indicated by the DL grant is actually exactly the same as the position indicating the DL grant. But now there is its own R-PDSCH, so additional information is needed to tell the RN to demodulate its R-PDSCH.

In summary, in the current scheme, if RBG-based resource allocation is used, the UL grant may or may not be transmitted in the second slot of one PRB pair. The current assumption is that a UL grant is detected, and is considered to be; if not, it is considered as not. However, if the UL grant is transmitted to the relay, the relay does not correctly detect the UL grant. And the RBG also has the R-PDSCH, so the position of the UL grant is detected as the R-PDSCH by the relay, which causes the problem of resource position detection error of the R-PDSCH.

Disclosure of Invention

The invention provides a method, a device and a system for transmitting and detecting a backhaul link control signaling, which can realize correct detection of an R-PDSCH data position.

The method for detecting the backhaul link control signaling of the embodiment of the invention comprises the following steps:

the relay node determines whether R-PDSCH data is transmitted in a current bearable uplink resource scheduling signaling region;

if the R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region, the R-PDSCH data are detected in the current bearable uplink resource scheduling signaling region;

if the fact that the current bearable uplink resource scheduling signaling region does not transmit R-PDSCH data is determined, detecting uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region;

the configured information is dynamically configured resource scheduling information, and the method further comprises: the base station informs the dynamically configured resource scheduling information to the corresponding relay node by sending a signaling to the relay node; and the signaling sent by the base station is a downlink resource scheduling signaling, wherein the resource allocation type signaling comprises information bits for indicating whether R-PDSCH data exist in the PRB.

The transmission method of the backhaul link control signaling of the embodiment of the invention comprises the following steps:

the base station determines whether the current bearable uplink resource scheduling signaling region can transmit R-PDSCH data or not according to the configured information;

if the fact that the R-PDSCH data can be transmitted in the current bearable uplink resource scheduling signaling region is determined, the R-PDSCH data needing to be transmitted are transmitted in the current bearable uplink resource scheduling signaling region;

if the fact that the R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region is determined, transmitting uplink resource scheduling signaling to be transmitted in the current bearable uplink resource scheduling signaling region;

The detection device for the backhaul link control signaling of the embodiment of the present invention includes:

a judging unit, configured to determine whether R-PDSCH data is transmitted in a current region capable of carrying uplink resource scheduling signaling;

the detection unit is used for detecting the R-PDSCH data in the current bearable uplink resource scheduling signaling region if the R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region; if the fact that the current bearable uplink resource scheduling signaling region does not transmit R-PDSCH data is determined, detecting uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region;

the judging unit is used for detecting whether an information bit for indicating that an uplink resource scheduling signaling region sends R-PDSCH data or not according to a resource allocation type indication signaling in a downlink resource scheduling signaling sent by a received base station, and dynamically determining whether R-PDSCH data is transmitted or not in the current bearable downlink and uplink resource scheduling signaling region according to the content of the information bit.

The transmission device of the backhaul link control signaling of the embodiment of the present invention includes:

a judging unit, configured to determine whether R-PDSCH data can be transmitted in a current region capable of carrying uplink resource scheduling signaling according to the configured information;

a transmission unit, configured to transmit R-PDSCH data to be sent in the current bearable uplink resource scheduling signaling region if it is determined that R-PDSCH data can be transmitted in the current bearable uplink resource scheduling signaling region; if the fact that the R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region is determined, transmitting uplink resource scheduling signaling to be transmitted in the current bearable uplink resource scheduling signaling region;

the configured information is dynamically configured resource scheduling information, and the apparatus further includes:

a notifying unit, configured to notify the dynamically configured resource scheduling information to a corresponding relay node by sending a signaling to the relay node; the signaling sent by the base station is a downlink resource scheduling signaling, wherein the resource allocation type signaling comprises information bits for indicating whether R-PDSCH data exist in the physical resource block PRB.

The transmission system of the backhaul link control signaling of the embodiment of the present invention includes:

the base station is used for determining whether the current bearable uplink resource scheduling signaling region can transmit R-PDSCH data or not according to the configured information; if the fact that the R-PDSCH data can be transmitted in the current bearable uplink resource scheduling signaling region is determined, the R-PDSCH data needing to be transmitted are transmitted in the current bearable uplink resource scheduling signaling region; if the fact that the R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region is determined, transmitting uplink resource scheduling signaling to be transmitted in the current bearable uplink resource scheduling signaling region; the configured information is dynamically configured resource scheduling information, and the base station informs the dynamically configured resource scheduling information to the corresponding relay node by sending a signaling to the relay node; the signaling sent by the base station is a downlink resource scheduling signaling, wherein the resource allocation type signaling comprises information bits for indicating whether R-PDSCH data exist in the PRB;

the relay node equipment is used for determining whether R-PDSCH data are transmitted in a current bearable uplink resource scheduling signaling region; if the R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region, the R-PDSCH data are detected in the current bearable uplink resource scheduling signaling region; if the fact that the current bearable uplink resource scheduling signaling region does not transmit R-PDSCH data is determined, detecting uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region; the method for determining whether the R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region by the relay node comprises the following steps: the relay node detects whether an information bit for indicating that an uplink resource scheduling signaling region sends R-PDSCH data or not according to a resource allocation type indication signaling in a downlink resource scheduling signaling sent by a received base station, and dynamically determines whether R-PDSCH data is transmitted or not in the current bearable downlink and uplink resource scheduling signaling region according to the content of the information bit.

In this embodiment, the relay node may determine whether R-PDSCH data is transmitted in a current region capable of carrying uplink resource scheduling signaling; if the R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region, the R-PDSCH data are detected in the current bearable uplink resource scheduling signaling region; and if the R-PDSCH data is not transmitted in the current bearable uplink resource scheduling signaling region, detecting the uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region. In the embodiment, whether the R-PDSCH is sent in the UL grant area in the R-PDCCH is determined, so that the data transmission can be carried out by using the R-PDSCH under the condition that the UL grant does not exist. Meanwhile, the situation that the UL grant region is mistakenly detected as the R-PDSCH due to the wrong detection of the UL grant can be avoided.

Drawings

FIG. 1 is a schematic diagram of a network structure of LTE-A;

FIG. 2 is a schematic diagram of transmission in a TDM + FDM multiplexing mode;

FIG. 3 is a diagram illustrating transmission in FDM multiplexing;

FIG. 4 is a diagram illustrating a possible multiplexing scheme of DL grant and UL grant;

FIG. 5 is a diagram illustrating a DL grant and a UL grant configured in a RBG;

fig. 6 is a diagram illustrating DL grant and UL grant configurations in multiple RBGs;

fig. 7 is a flowchart illustrating a method for detecting backhaul link control signaling according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a method for transmitting backhaul link control signaling according to an embodiment of the present invention;

fig. 9 is a diagram illustrating UL grant interleaving of multiple RNs in case of using CRS demodulation according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating a configuration of a DL grant and a UL grant in a plurality of RBGs according to an embodiment of the invention;

FIG. 11 is a diagram illustrating an embodiment of an RN allocated to a RBG;

fig. 12 is a device for detecting backhaul link control signaling according to an embodiment of the present invention;

fig. 13 is a device for transmitting backhaul link control signaling according to an embodiment of the present invention.

Detailed Description

When resource indication is performed using the RBG scheme, there is a problem that one UL grant may have. It is this possibility that causes a problem of a position detection error of the R-PDSCH resources. Because the UL grant may exist, if the UL grant really exists but there is no detection, the R-PDSCH resource may be mistakenly selected; if there is no UL grant and it is detected, there will be a case where the R-PDSCH resource is taken in error.

Therefore, the solution is to remove this possibility, i.e., either always transmit UL grant, or transmit R-PDSCH if not; or the R-PDSCH is always transmitted, i.e., the UL grant is not transmitted to this place, but even if the UL grant is transmitted to other places, there is the problem if it is several PRBs in one RBG; or additional information is given indicating whether there is a UL grant.

Therefore, it is seen that, no matter which RBG the UL grant is put in for transmission, there are cases where transmission may be performed or transmission may not be performed, so a relatively uniform method is to dedicate the resource to the UL grant and not share the resource with the R-PDSCH. If this is done, the PRBs occupied by the DL grant are all dedicated to the UL grant in the second slot. Of course, either is an additional indication.

Therefore, in summary, for the relay, the detection of the UL grant is performed according to some rule or instruction, that is, the relay can determine whether the UL grant exists at the position by some way. Only then can the correctness of the resource position of the R-PDSCH be guaranteed.

In order to realize the correct detection of the R-PDCCH data, in the embodiment of the invention, the relay node determines whether the R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region; if the R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region, the R-PDSCH data are detected in the current bearable uplink resource scheduling signaling region; and if the R-PDSCH data is not transmitted in the current bearable uplink resource scheduling signaling region, detecting the uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region.

Referring to fig. 7, a method for detecting backhaul link control signaling according to an embodiment of the present invention includes the following steps:

step 701: the relay node determines whether the current region capable of carrying the uplink resource scheduling signaling transmits R-PDSCH data, if so, the step 702 is executed, otherwise, the step 703 is executed.

The relay node can determine whether to transmit R-PDSCH data in the current bearable uplink resource scheduling signaling region according to various modes.

Such as: whether R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region can be determined according to the obtained static configuration information in advance.

For another example, whether the R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region may be dynamically determined according to the signaling sent from the received base station.

As an implementation manner, if the signaling sent by the base station is a downlink resource scheduling signaling, the relay node detects an information bit indicating whether an uplink resource scheduling signaling region sends R-PDSCH data or not from a resource allocation type indication signaling in the downlink resource scheduling signaling, and determines whether R-PDSCH data is transmitted or not in the current bearable downlink uplink resource scheduling signaling region according to the content of the information bit. The information bit indicating whether the uplink resource scheduling signaling region sends R-PDSCH data may be one or more bits in the resource allocation type indication bit or one or more newly added bits.

Taking the current LTE-a system as an example, there are 3 specific resource allocation types, i.e. type0, 1, 2. In all three resource allocation signaling, a series of bit information is included, for example, in type0, 25 bits may be used to indicate the resource occupation of 100 PRBs, where each bit indicates the occupation of 4 PRBs. Then, for the embodiment of the present invention, the following configuration may be performed:

the method comprises the following steps: 1 extra bit is added to indicate whether there is R-PDSCH in the uplink resource scheduling signaling region, so the length of the original type0 is increased.

The method 2 comprises the following steps: redefining one bit of the original 25 bits, for example, using the lowest bit or the highest bit of the bit series to indicate whether there is R-PDSCH in the uplink resource scheduling signaling region, then the relay is clear at this time, and if the lowest bit or the highest bit of the bit series is 1, it indicates that there is R-PDSCH in the uplink resource scheduling signaling region, not to say that the PRB group is allocated to the RN resource. If the lowest bit or the highest bit of the bit series is 0, it indicates that there is no R-PDSCH in the uplink resource scheduling signaling region.

Step 702: and detecting R-PDSCH data in the current region capable of bearing the uplink resource scheduling signaling, and jumping out.

Step 703: and detecting the uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling area.

Under the condition of CRS demodulation, if it is determined that no R-PDSCH data is transmitted in the current region capable of bearing the uplink resource scheduling signaling, the uplink resource scheduling signaling is transmitted in the current region capable of bearing the uplink resource scheduling signaling, and certainly, the uplink resource scheduling signaling is not transmitted.

Referring to fig. 8, a method for transmitting backhaul link control signaling according to an embodiment of the present invention includes the following steps:

step 801: the base station determines whether the current region capable of bearing the uplink resource scheduling signaling can transmit R-PDSCH data according to the configured information, if so, the step 802 is executed, otherwise, the step 803 is executed.

The configured information may be preset resource scheduling information or dynamically configured resource scheduling information.

That is to say, the base station may determine whether R-PDSCH data can be transmitted in the current bearable uplink resource scheduling signaling region according to the statically configured resource scheduling information or the dynamically configured resource scheduling information.

And when the resource scheduling information which is statically configured is adopted, if the current bearable uplink resource scheduling signaling region is determined to be incapable of transmitting the R-PDSCH data, the R-PDSCH data is not transmitted in the bearable uplink resource scheduling signaling region all the time.

If the dynamically configured resource scheduling information is adopted, the base station may further notify the corresponding relay node of the dynamically configured resource scheduling information by sending a signaling to the relay node.

Such as: and when the signaling sent by the base station is a downlink resource scheduling signaling, the resource allocation type signaling comprises information bits for indicating whether R-PDSCH data exist in the PRB. The information bit for indicating whether the uplink resource scheduling signaling region sends the R-PDSCH data is one or more bits in the resource allocation type indication bit or one or more newly added bits.

Step 802: and transmitting R-PDSCH data to be transmitted in the current region capable of carrying the downlink resource scheduling signaling.

Step 803: and transmitting the uplink resource scheduling signaling to be transmitted in the current bearable uplink resource scheduling signaling area.

In step 803, the base station may transmit uplink resource scheduling signaling for one or more relay nodes, which needs to be transmitted, in the current bearable uplink resource scheduling signaling region.

The technical solution of the present invention will be described in detail below with reference to specific examples.

In the embodiment of the invention, two situations of whether the demodulation pilot frequency is the CRS or the DMRS need to be considered.

CRS demodulation:

referring to fig. 9, in case of using CRS demodulation, UL grants of multiple RNs are interleaved together. There are several cases at this time, such as there are two RNs, RN1 and RN2, and for RN1 and RN2, there is a case where the UL grant region transmits only the UL grant of RN2, and at this time, although there is no UL grant of RN1 in this region, the RBG indication of R-PDSCH of RN1 is the same as the RBG of UL grant, so it is necessary to give a clear indication to RN1 at this time, that is, the RBG region has UL grant, although it is not the UL grant of RN 1. It also gives an explicit indication to RN2 that there is its UL grant within the RBG. That is, under the CRS demodulation condition, and under the condition that the UL grant of any RN exists in the UL grant region, it is necessary to send the same indication to all RNs that may be received, that is, to notify whether the RN may currently carry R-PDSCH data or not in the uplink resource scheduling signaling region, and if it is notified that no R-PDSCH data is transmitted in the uplink resource scheduling signaling region, the UL grant may exist. Under the condition that no R-PDSCH data transmission indication in the current bearable uplink resource scheduling signaling region is received, the RN needs to perform UL grant detection, but may detect the UL grant or may not detect the UL grant, which does not cause the condition that an R-PDSCH resource region is wrong.

The second case is that no UL grant of any RN is transmitted in the UL grant region, and the UL grant region may transmit R-PDSCH to a RN. At this time, all the RNs under the base station need to be notified to indicate that R-PDSCH data aiming at the RNs exist in the UL grant region, and then the RNs with the R-PDSCH resources allocated to the UL grant region can detect the R-PDSCH resources of the RNs

Fig. 10 is a diagram illustrating a configuration of DL grant and UL grant in a plurality of RBGs. As shown in fig. 10, all RNs receive the instruction and determine that there is R-PDSCH data for the RN in the current UL grant region, that is, there is no UL grant, so the relay 1 can detect the R-PDSCH in the UL grant region according to the resource instruction of the DL grant. The same applies to relay 2.

In case of DMRS demodulation, the problem may be relatively simple since a certain PRB pair is dedicated for a certain RN. Referring to fig. 11, in a certain RBG, the resource allocated to RN1 is dedicated, i.e. there is no resource of other RNs. In this case, RN1 may simply be instructed whether R-PDSCH is present. Detecting the R-PDSCH in the region of the UL grant if the R-PDSCH exists; otherwise, the R-PDSCH is not detected in the region of the UL grant.

From the above analysis of the two cases of CRS demodulation and DMRS demodulation, it is necessary to indicate whether R-PDSCH exists in the region of RN and UL grant in both the case of CRS demodulation and DMRS demodulation. The meaning of the specific content, of course, varies. In the case of CRS demodulation, there is R-PDSCH in the region of UL grant, i.e. there is no UL grant, meaning that no UL grant for all RNs exists in the second slot; if the UL grant region is indicated to have no R-PDSCH, that is, the UL grant region has UL grant, it indicates that there is some UL grant of some RN or RNs, not necessarily the UL grant of the RN that has received the notification of course.

Under the condition of DMRS demodulation, if the base station indicates that the UL grant region has the R-PDSCH, no UL grant exists, namely no UL grant of the current RN; if the base station indicates that the UL grant region does not have the R-PDSCH, namely the UL grant exists, the UL grant is the UL grant with the current RN.

In addition, there are two ways for the RN to determine whether the R-PDSCH is transmitted in the UL grant region, one is static, that is, the RN determines statically according to a certain condition without the instruction of dynamic signaling; one is dynamic, i.e. the RN is dynamically signalled by the base station.

There are also various ways if it is statically configured, and the simplest one is that if it is transmitted based on RBG, the UL grant region always transmits only UL grant, and even if there is no UL grant, R-PDSCH is not transmitted. This is a static scheme where there is a relatively large waste of resources because the area is also blank in the case where UL grant is not transmitted.

In the case of the dynamic configuration method, the method of indicating with the DL grant is more direct. That is, one bit is added to inform each RN whether the UL grant region transmits the R-PDSCH.

The basic solution is as follows: and adding information of one bit in the DL grant to indicate whether the R-PDSCH is transmitted in the PRB behind the bit. The UL grant information may be for the RN or for other RNs.

In case of DMRS: and adding 1bit of information in the DL grant to indicate whether the R-PDSCH of the RN is transmitted in the PRB behind the DL grant.

RN side detection: if the R-PDSCH does not exist, the detection of the R-PDSCH removes the area occupied by the UL grant; if the presence of the R-PDSCH is indicated, the detection of the R-PDSCH includes the UL grant region.

In case of CRS: the information of adding 1bit in the DL grant indicates whether R-PDSCH exists in the PRB following the DL grant, which is a case where interleaving may exist, because indication is needed even if UL grant of another RN exists. For RN detection, if the R-PDSCH exists, the detection of the R-PDSCH is carried out. If the R-PDSCH is not present, a UL grant is detected.

Of course, if the information of the indicated R-PDSCH in the dynamic configuration is not transmitted all the time, it is equivalent to the static configuration that the UL grant is likely to be transmitted all the time, and the region does not transmit any R-PDSCH.

The dynamic configuration also has a method of changing the original information bit content in the information bits of the current type 0. Since it can be clear from the eNB perspective whether the current service is a relay or a UE, in case of a relay, and the type0 is used to perform notification in units of RBGs, the lowest order or the highest order RBG space is not scheduled to the relay, and bit information of the RBG position is used to indicate whether R-PDSCH information exists. The method has the advantage of relatively small change in the current standard, and only the high order or low order of the type0 information bit is specified for special processing.

In summary, in the static configuration case, the eNB does not transmit the R-PDSCH in the UL grant region, and can transmit the UL grant only in the UL grant region. Detecting a UL grant in a UL grant area at a relay side, and if the UL grant is detected, executing the existing operation; otherwise, the R-PDSCH is not detected in the region.

Under the dynamic configuration condition, if the eNB side determines that the UL grant exists, the RN is informed that the R-PDSCH does not exist in the UL grant area. Otherwise, informing the RN that the R-PDSCH exists in the UL grant area. And if the R-PDSCH exists in the UL grant region, transmitting the R-PDSCH by using the region. The relay side receives a notification signaling of the eNB, and if the relay side determines that the R-PDSCH does not exist in a UL grant region according to the notification, the UL grant is detected in the region; and detecting the R-PDSCH in the UL grant region if the R-PDSCH is determined to exist in the UL grant region according to the notification.

Referring to fig. 12, an apparatus for detecting backhaul link control signaling according to an embodiment of the present invention includes: a judging unit 121 and a detecting unit 122. Wherein,

a determining unit 121, configured to determine whether R-PDSCH data is transmitted in a current region capable of carrying uplink resource scheduling signaling;

a detecting unit 122, configured to detect R-PDSCH data in a current bearable uplink resource scheduling signaling region if it is determined that R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region; and if the R-PDSCH data is not transmitted in the current bearable uplink resource scheduling signaling region, detecting the uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region.

The determining unit 121 is configured to determine whether R-PDSCH data is transmitted in a current region capable of carrying uplink resource scheduling signaling according to static configuration information obtained in advance.

The determining unit 121 is configured to dynamically determine whether R-PDSCH data is transmitted in a current region capable of carrying uplink resource scheduling signaling according to the signaling sent from the received base station.

The detecting unit 122 is configured to, under the condition that CRS demodulation is adopted, if it is determined that no R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region, transmit an uplink resource scheduling signaling or no uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region.

The judging unit is used for detecting information bits indicating whether the uplink resource scheduling signaling region sends R-PDSCH data or not from the resource allocation type indication signaling in the downlink resource scheduling signaling, and determining whether the current bearable downlink uplink resource scheduling signaling region transmits the R-PDSCH data or not according to the content of the information bits. The information bit for indicating whether the uplink resource scheduling signaling region sends the R-PDSCH data is one or more bits in the resource allocation type indication bit or one or more newly added bits.

Referring to fig. 13, an apparatus for transmitting backhaul link control signaling according to an embodiment of the present invention includes: a judging unit 131 and a transmitting unit 132.

A determining unit 131, configured to determine whether R-PDSCH data can be transmitted in a current region capable of carrying uplink resource scheduling signaling according to the configured information;

a transmitting unit 132, configured to transmit R-PDSCH data to be sent in the current bearable uplink resource scheduling signaling region if it is determined that R-PDSCH data can be transmitted in the current bearable uplink resource scheduling signaling region; and if the current bearable uplink resource scheduling signaling region is determined to be incapable of transmitting R-PDSCH data, transmitting the uplink resource scheduling signaling to be transmitted in the current bearable uplink resource scheduling signaling region.

The configured information is preset resource scheduling information. And the transmission unit is used for not transmitting the R-PDSCH data in the uplink resource scheduling signaling region if the current uplink resource scheduling signaling region capable of being carried is determined not to be capable of being transmitted.

The configured information is dynamically configured resource scheduling information, and the apparatus further includes: and the notification unit is used for notifying the dynamically configured resource scheduling information to the corresponding relay node by sending a signaling to the relay node.

And the signaling sent by the base station is a downlink resource scheduling signaling, wherein the resource allocation type signaling comprises information bits for indicating whether R-PDSCH data exist in the PRB. The information bit for indicating whether the uplink resource scheduling signaling region sends the R-PDSCH data is one or more bits in the resource allocation type indication bit or one or more newly added bits.

The transmitting unit 132 may be configured to transmit, when it is determined that R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region, uplink resource scheduling signaling for one or more relay nodes, where the uplink resource scheduling signaling is required to be transmitted, in the current bearable uplink resource scheduling signaling region.

The embodiment of the invention also provides a transmission system of the backhaul link control signaling, which comprises: a base station and a relay node.

The base station is used for determining whether the current bearable uplink resource scheduling signaling region can transmit R-PDSCH data or not according to the configured information; if the fact that the R-PDSCH data can be transmitted in the current bearable uplink resource scheduling signaling region is determined, the R-PDSCH data needing to be transmitted are transmitted in the current bearable uplink resource scheduling signaling region; if the fact that the R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region is determined, transmitting uplink resource scheduling signaling to be transmitted in the current bearable uplink resource scheduling signaling region;

the relay node equipment is used for determining whether R-PDSCH data are transmitted in a current bearable uplink resource scheduling signaling region; if the R-PDSCH data are transmitted in the current bearable uplink resource scheduling signaling region, the R-PDSCH data are detected in the current bearable uplink resource scheduling signaling region; and if the R-PDSCH data is not transmitted in the current bearable uplink resource scheduling signaling region, detecting the uplink resource scheduling signaling in the current bearable uplink resource scheduling signaling region.

Of course, the system according to the embodiment of the present invention may also perform an interaction process according to the embodiments shown in fig. 7 and fig. 8, which is not described herein again.

The scheme of the embodiment makes clear whether the R-PDSCH is sent in the UL grant area in the R-PDCCH, so that the data transmission can be carried out by using the R-PDSCH under the condition that the UL grant does not exist. Meanwhile, the situation that the UL grant region is mistakenly detected as the R-PDSCH due to the wrong detection of the UL grant can be avoided.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for detecting backhaul link control signaling, the method comprising:

the relay node determines whether physical downlink shared channel R-PDSCH data which sends information to the relay node is transmitted in a current uplink resource scheduling signaling bearing region;

the method for determining whether the R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region by the relay node comprises the following steps: the relay node detects whether an information bit for indicating that an uplink resource scheduling signaling region sends R-PDSCH data or not according to a resource allocation type indication signaling in a downlink resource scheduling signaling sent by a received base station, and dynamically determines whether R-PDSCH data is transmitted or not in the current bearable downlink and uplink resource scheduling signaling region according to the content of the information bit.

2. The method of claim 1, wherein if it is determined that no R-PDSCH data is transmitted in the current bearable uplink resource scheduling signaling region under the condition of CRS demodulation,

the uplink resource scheduling signaling is transmitted or not transmitted in the current bearable uplink resource scheduling signaling region.

3. The method of claim 1, wherein the information bits indicating whether the uplink resource scheduling signaling region transmits R-PDSCH data are one or more bits of the resource allocation type indicator bits or one or more newly added bits.

4. A method for transmitting backhaul link control signaling, the method comprising:

5. The method of claim 4, wherein the information bits indicating whether the uplink resource scheduling signaling region transmits R-PDSCH data are one or more bits of the resource allocation type indicator bits or one or more newly added bits.

6. The method of claim 4, wherein if it is determined that the R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region, transmitting uplink resource scheduling signaling for one or more relay nodes to be transmitted in the current bearable uplink resource scheduling signaling region.

7. An apparatus for detecting backhaul link control signaling, the apparatus comprising:

8. The apparatus of claim 7, wherein the detecting unit is configured to transmit uplink resource scheduling signaling or not transmit uplink resource scheduling signaling in the currently bearable uplink resource scheduling signaling region if it is determined that no R-PDSCH data is transmitted in the currently bearable uplink resource scheduling signaling region under CRS demodulation.

9. The apparatus of claim 7, wherein the information bits indicating whether the uplink resource scheduling signaling region transmits R-PDSCH data are one or more bits of the resource allocation type indicator bits or one or more newly added bits.

10. An apparatus for transmitting backhaul link control signaling, the apparatus comprising:

a notifying unit, configured to notify the dynamically configured resource scheduling information to a corresponding relay node by sending a signaling to the relay node; the signaling is downlink resource scheduling signaling, wherein the resource allocation type signaling comprises information bits for indicating whether R-PDSCH data exist in the physical resource block PRB.

11. The apparatus of claim 10, wherein the information bits indicating whether the uplink resource scheduling signaling region transmits R-PDSCH data are one or more bits of the resource allocation type indicator bits or one or more newly added bits.

12. The apparatus of claim 10, wherein the transmitting unit is configured to transmit uplink resource scheduling signaling for one or more relay nodes to be transmitted in the current bearable uplink resource scheduling signaling region when it is determined that R-PDSCH data cannot be transmitted in the current bearable uplink resource scheduling signaling region.

13. A system for transmission of backhaul link control signaling, the system comprising: