CN108370561B

CN108370561B - Link resource request method, user equipment and base station

Info

Publication number: CN108370561B
Application number: CN201580085333.1A
Authority: CN
Inventors: 时洁; 曹振臻
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2021-02-12
Anticipated expiration: 2035-12-30
Also published as: WO2017113173A1; CN108370561A

Abstract

The invention provides a link resource request method, user equipment and a base station, relates to the field of communication, and is used for requesting link resources for UE (user equipment), relaying data of remote UE to an eNB (evolved node B), or transmitting data between the UE and the UE belonging to different groups. The method comprises the following steps: the relay user equipment sends a connection request to the base station; the connection request is used to indicate that the relay user equipment is to transmit data to the base station. The relay user equipment receives first configuration information sent by the base station. And the relay user equipment generates a buffer status report according to the first configuration information and reports the buffer status report to the base station, wherein the buffer status report is used for indicating the size of the relay data and the logical channel and/or the logical channel group corresponding to the relay data. And the relay user equipment receives the second configuration information sent by the base station. And the relay user equipment sends the relay data to the base station through the wireless resource distributed to the relay user equipment by the base station.

Description

Link resource request method, user equipment and base station

Technical Field

The present invention relates to the field of communications, and in particular, to a method for requesting link resources, a user equipment and a base station

Background

In LTE (Long Term Evolution ) R12, D2D (Device To Device) technology is introduced, i.e., UEs under an eNB can communicate autonomously or under the management of the eNB. As shown in fig. 1, UE1 belongs to group a, and UE1 may communicate with UE2 within group a. UE1 also belongs to group B, and UE1 may also communicate with UE3 within group B.

With the further development of wireless communication technology, the requirement for the D2D technology is further enhanced, and the UE is required to communicate with other UEs in the group, and also with other UEs belonging to different groups. In addition, a remote UE that is out of the coverage of the eNB may also relay data to the eNB with a relay UE that is in the coverage of the eNB, or the eNB may relay data to the remote UE by relaying the UE data.

Generally, the UE may Report the size of data to be transmitted to the eNB through a BSR (Buffer Status Report), and request the eNB to allocate a resource link for transmitting the data. The current BSR is only applicable to the UE requesting D2D link resources, i.e. the UE requests link resources for itself and UEs in the group, or the UE can only request link resources for data transmission between itself and the eNB using the BSR.

Disclosure of Invention

Embodiments of the present invention provide a method for requesting link resources, user equipment, and a base station, which can request link resources for a UE, and are used to relay data of a remote UE to an eNB, or to transmit data between the UE and UEs belonging to different groups.

Currently, the D2D technology requires that a UE (user equipment) can communicate not only with UEs in the same group, but also with surrounding UEs not belonging to the same group. In addition, the UE in the coverage of the base station may also relay data of the UE out of the coverage of the base station to the base station, or the base station may relay data to the UE out of the coverage of the base station through the UE in the coverage.

In the above scenario, a UE in the coverage of the base station for relaying data is referred to as a relay user equipment, and a UE out of the coverage of the base station is referred to as a remote user equipment.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a method for requesting link resources is disclosed, which includes:

the relay user equipment firstly sends a connection request to the base station, and indicates the base station that the relay user equipment is to transmit data to the base station. Of course, the data includes relay data that the remote user equipment needs to transmit to the base station through the relay user equipment. It should be noted that the relay ue is in the coverage of the base station, and the remote ue is out of the coverage of the base station, that is, the relay ue and the remote ue do not belong to the same group. In addition, the connection request may also carry service characteristics of the remote user equipment, such as: qos, etc. Here, the traffic characteristics of the remote user equipment may have been previously obtained by the relay user equipment from the remote user equipment.

The relay user equipment receives first configuration information sent by the base station; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel of the radio bearer. The identification of the radio bearer may be an ID of the radio bearer, and the identification information of the logical channel of the radio bearer may be an LCGID.

And the relay user equipment generates a reporting buffer state report according to the first configuration information and reports the buffer state report to the base station. Actually, the relay user equipment determines the radio bearer and the logical channel of the radio bearer allocated by the base station for the relay data according to the first configuration information, selects a logical channel group and/or a logical channel therein, and reports the selected logical channel and/or the logical channel group and the size of the relay data to the base station through the buffer status report, so that the base station allocates radio resources for the relay data. That is, the buffer status report is used to indicate the size of the relay data and the logical channel and/or the logical channel group corresponding to the relay data.

Then, the relay user equipment receives second configuration information sent by the base station; and the second configuration information carries the information of the wireless resources allocated to the relay user equipment by the base station according to the cache state report.

And the relay user equipment sends the relay data to the base station through the wireless resource distributed to the relay user equipment by the base station.

In the prior art, a UE can only request link resources from an eNB (evolved base station) through a BSR. The current BSR is only applicable to the UE requesting D2D link resources, i.e. the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and relay the data of the remote UE to the eNB.

With reference to the first aspect, in a first possible implementation manner of the first aspect, a MAC CE (Media Access Control Element ) of the cache status report may be the same as a MAC CE of an existing BSR (i.e., the first BSR in the present invention), that is, the MAC CE of the cache status report is the first MAC CE; wherein the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station. It should be noted that the MAC CE is an identifier in the packet header, and is used to indicate what data is the packet data part. Illustratively, the fourth MAC CE of the header is 1001, and the fourth MAC CE of the data portion is a BSR.

Or, the MAC CE of the buffer status report is different from the MAC CE of the existing BSR and identifies the second MAC CE. Wherein the second MAC CE is different from the first MAC CE, the second MAC CE is configured to indicate a second BSR, and the second BSR is used for the relay user equipment to request link resources for forwarding the relay data.

That is, the buffer status report of the present invention can reuse the MAC CE of the existing BSR, such as: 1001. a new MAC CE may also be set for the buffer status report provided by the present invention, such as: 10010.

with reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, if the relay user equipment needs to forward data for one or more remote user equipments, a radio bearer allocated to the relay data is one of bearers between the relay user equipment and the base station. That is, when the relay user forwards data to the base station for the one or more remote user equipments, a bearer is shared, and this bearer may be a radio bearer or a bearer at a core network level.

Then, the first configuration information specifically includes the identification information of the one bearer, the identification information of the logical channel group where the one bearer is located, and the priority information of the logical channel corresponding to the one bearer. Here, the logical channel group includes a plurality of logical channels with the same bearer service, and after the base station allocates the logical channel group to the relay data, it needs to indicate the priority of each logical channel in the logical channel group of the relay user equipment, so that the relay user equipment can select a suitable logical channel.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearers allocated to the relay data are X bearers out of bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

then, the first configuration information specifically includes the identification information of the X bearers, the identification information of the logical channel group where the X bearers are located, and the priority information of the logical channels corresponding to the X bearers.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearers allocated to the relay data are Y bearers among bearers between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different. That is, when the relay ue forwards data to the base station for the one or more remote ues, one bearer is allocated to the data of each remote ue. For example, if the relay user equipment needs to forward data for 4 remote user equipments, the base station allocates 4 bearers for the relay data.

In this way, the first configuration information specifically includes the identification information of the Y bearers, the identification information of the logical channel group in which the Y bearers are located, and the priority information of the logical channels corresponding to the Y bearers.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearers allocated to the relay data are Q bearers among bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, and Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment. For example, if the relay user equipment needs to forward data for 4 remote user equipments, and each remote user equipment corresponds to 2 RBs, the base station needs to allocate 2 × 4 — 8 bearers for the relay data.

At this time, the first configuration information specifically includes identification information of the Q bearers, identification information of a logical channel group in which the Q bearers are located, and priority information of logical channels corresponding to the Q bearers.

With reference to any one of the third to fifth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the logical channel allocated by the base station for the relay data may be a logical channel corresponding to an existing BSR (that is, a logical channel used for requesting link resources for data transmission between the base station and the UE and data transmission between the UE and a UE in the same group), or a logical channel group may be newly set for the relay data, that is, the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

Similarly, the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

In a second aspect, a method for requesting link resources includes:

the method comprises the steps that first user equipment reports a first cache state report to a base station, wherein the first cache state report is used for indicating the size of first data and logic channel group information corresponding to the first data; the first data is data transmitted between the first user equipment and second user equipment, and the first user equipment and the second user equipment are not in a group.

It should be noted that the first data is data transmitted between the first user equipment and the second user equipment. The existing BSR can only request link resources for data transmission between the UE and the UE in the same group, but in the present invention, link resources can be requested for data transmission between the UE and the UE in different groups.

The first user equipment receives resource configuration information sent by the base station; the resource configuration information is used for indicating the base station to allocate radio resources for the first data according to the first buffer status report;

the first equipment determines the wireless resources allocated to the first data by the base station according to the resource configuration information;

and the first user equipment performs data transmission with second user equipment through the wireless resource allocated to the first data by the base station.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first buffer status report includes a size of the first data and identities of Z logical channel groups corresponding to the first data. That is, the first user equipment determines a corresponding logical channel group according to the service characteristics of the first data, and reports the size of the first data and the identifier of the determined logical channel group to the base station.

The logical channel group corresponding to the first data may be one or more of the logical channel groups corresponding to the existing BSRs (i.e., the third BSRs), and therefore, the first buffer status report further includes: identification information of the N logical channel groups; the N logical channel groups are logical channel groups except the Z-th logical channel group among M logical channel groups corresponding to the third BSR;

wherein the third BSR is configured for the first user equipment to request link resources for data transmission between the first user equipment and the third user equipment; the third user equipment and the first user equipment belong to the same group. That is, the existing BSR can request link resources for data transmission between the UE and the UEs in the same group.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the method further includes: the first user equipment reports the distribution information of the logical channel group to the base station; the logical channel group allocation information carries index values of the Z logical channel groups.

For example, if the third BSR corresponds to 16 logical channel groups, the number of the logical channel groups is 0 to 15, and the logical channel group used by the first data is the first 6 of the 16 logical channel groups. The index values carried in the logical channel group allocation information by the first user equipment are 0, 1, 2, 3, 4, and 5, and the base station receiving the logical channel group allocation information can determine that the logical channel group corresponding to the first data is a logical channel group with a serial number of 0-5.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the MAC CE of the first buffer status report is a third MAC CE; the third MAC CE is different from the MAC CE of the third BSR;

wherein the third BSR is further configured to request link resources for relay data; the relay data is data which is required to be forwarded to the base station by the remote user equipment through the first user equipment.

That is, the first buffer status report may reuse the MAC CE of the existing BSR, or may set a new MAC CE for the first buffer status report.

In a third aspect, a method for requesting link resources is disclosed, which includes:

generally, when the ue needs to forward data of the remote ue to the base station as a relay ue, a connection request is sent to the base station to inform the base station that the data of the remote ue is to be relayed.

Firstly, a base station receives a connection request sent by relay user equipment; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, and the data comprises data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group.

The base station distributes a radio bearer for the relay data and sends first configuration information to the user equipment; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel of the radio bearer.

And the base station receives a buffer status report reported by the user equipment, wherein the buffer status report is used for indicating the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data.

The base station allocates wireless resources for the relay user equipment according to the cache state report and sends second configuration information to the user equipment; the second configuration information carries information of wireless resources allocated by the base station to the relay user equipment;

and the base station receives the relay data sent by the user equipment through the wireless resource.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

or, the MAC CE of the cache status report is a second MAC CE identifier; the second MAC CE is different from the first MAC CE, and the second MAC CE is configured to indicate a second BSR, where the second BSR is used for the relay ue to request link resources for forwarding the relay data.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically includes:

the base station allocates a radio bearer for the relay data to be one of the bearers between the relay user equipment and the base station;

then, the first configuration information specifically includes the identification information of the one bearer, the identification information of the logical channel group where the one bearer is located, and the priority information of the logical channel corresponding to the one bearer.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically includes:

the base station distributes wireless load bearing for the relay data to X load bearing in the load bearing between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

With reference to the third aspect or the first possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically includes:

the base station distributes the wireless load for the relay data to Y loads in the loads between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

then, the first configuration information specifically includes the identification information of the Y bearers, the identification information of the logical channel group where the Y bearers are located, and the priority information of the logical channels corresponding to the Y bearers.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically includes:

the base station distributes wireless load bearing for the relay data to Q load bearing in the load bearing between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

then, the first configuration information specifically includes identification information of the Q bearers, identification information of a logical channel group in which the Q bearers are located, and priority information of logical channels corresponding to the Q bearers.

With reference to any one of the third to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

With reference to any one of the third to fifth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

In a fourth aspect, a method for requesting link resources is disclosed, which includes:

a base station receives a first cache state report reported by first user equipment, wherein the first cache state report is used for indicating the size of first data and logic channel group information corresponding to the first data; the first data is data transmitted between the first user equipment and second user equipment, and the first user equipment and the second user equipment are not in a group;

the base station allocates wireless resources for the first data, wherein the wireless resources are used for data transmission between the first user equipment and the second user equipment;

the base station sends resource configuration information to the first user equipment; the resource configuration information is used for indicating the base station to allocate the radio resource for the first data according to the first buffer status report.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the first buffer status report includes a size of the first data and identifiers of Z logical channel groups corresponding to the first data;

the first cache status report further comprises: identification information of the N logical channel groups; the N logical channel groups are logical channel groups except the Z-th logical channel group among M logical channel groups corresponding to the third BSR;

wherein the third BSR is configured for the first user equipment to request link resources for data transmission between the first user equipment and the third user equipment; the third user equipment and the first user equipment belong to the same group.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the method further includes:

the base station receives the logical channel group distribution information reported by the first user equipment; the logical channel group allocation information carries index values of the Z logical channel groups.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the MAC CE of the first buffer status report is a third MAC CE; the third MAC CE is different from the MAC CE of the third BSR,

In a fifth aspect, a relay user equipment includes:

a transmitting unit configured to transmit a connection request to a base station; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, wherein the data comprises relay data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group;

a receiving unit, configured to receive first configuration information sent by the base station; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel group of the radio bearer;

a generating unit, configured to generate a buffer status report according to the first configuration information, and report the buffer status report to the base station; the buffer status report is used for indicating the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data;

the sending unit is further configured to report the buffer status report to the base station;

the receiving unit is further configured to receive second configuration information sent by the base station; the second configuration information carries information of wireless resources allocated to the relay user equipment by the base station according to the cache status report;

the sending unit is further configured to send the relay data to the base station through the radio resource allocated by the base station to the relay user equipment.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, if the relay user equipment needs to forward data for one or more remote user equipments, a radio bearer allocated to the relay data is one of bearers between the relay user equipment and the base station;

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearers allocated for the relay data are X bearers among bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearers allocated for the relay data are Y bearers among bearers between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearers allocated for the relay data are Q bearers among bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

With reference to the fifth aspect or any one of the second to fifth possible implementations of the fifth aspect, in a sixth possible implementation of the fifth aspect, the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

With reference to the fifth aspect or any one of the second to fifth possible implementations of the fifth aspect, in a seventh possible implementation of the fifth aspect, the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

In a sixth aspect, a first user equipment is disclosed, comprising:

a sending unit, configured to report a first buffer status report to a base station, where the first buffer status report is used to indicate a size of first data and logical channel group information corresponding to the first data; the first user equipment and the second user equipment are not in a group;

a receiving unit, configured to receive resource configuration information sent by the base station; the resource configuration information is used for indicating the base station to allocate radio resources for the first data according to the first buffer status report;

a determining unit, configured to determine, according to the resource configuration information, a radio resource allocated by the base station for the first data;

the sending unit is further configured to perform data transmission with a second user equipment through the radio resource allocated by the base station to the first data.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the first buffer status report includes a size of the first data and identifiers of Z logical channel groups corresponding to the first data;

With reference to the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the sending unit is further configured to report logical channel group allocation information to the base station; the logical channel group allocation information carries index values of the Z logical channel groups.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the MAC CE of the first buffer status report is a third MAC CE; the third MAC CE is different from the MAC CE of the third BSR,

In a seventh aspect, a base station is disclosed, including:

a receiving unit, configured to receive a connection request sent by a relay user equipment; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, and the data comprises data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group;

an allocating unit, configured to allocate a radio bearer for the relay data and send first configuration information to the relay user equipment; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel of the radio bearer;

the receiving unit is further configured to receive a buffer status report reported by the relay user equipment, where the buffer status report is used to indicate the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data;

the allocation unit is further configured to allocate radio resources to the relay user equipment according to the buffer status report;

a sending unit, configured to send second configuration information to the user equipment; the second configuration information carries information of wireless resources allocated by the base station to the relay user equipment;

the receiving unit is further configured to receive the relay data sent by the relay user equipment through the radio resource.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

With reference to the seventh aspect or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit is specifically configured to allocate a radio bearer for the relay data as one of bearers between the relay user equipment and the base station;

then, the first configuration information specifically includes the identification information of the one bearer, the identification information of the logical channel group where the one bearer is located, and the priority information of the logical channels included in the logical channel group where the one bearer is located.

With reference to the seventh aspect or the first possible implementation manner of the seventh aspect, in a third possible implementation manner of the seventh aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit is specifically configured to allocate radio bearers for the relay data to X bearers among bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

With reference to the seventh aspect or the first possible implementation manner of the seventh aspect, in a fourth possible implementation manner of the seventh aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit is specifically configured to allocate radio bearers for the relay data as Y bearers among bearers between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

With reference to the seventh aspect or the first possible implementation manner of the seventh aspect, in a fifth possible implementation manner of the seventh aspect, if the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit is specifically configured to allocate radio bearers for the relay data to Q bearers among bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

With reference to the seventh aspect or any one of the second to fifth possible implementations of the seventh aspect, in a sixth possible implementation of the seventh aspect, the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

With reference to the seventh aspect or any one of the second to fifth possible implementations of the seventh aspect, in a seventh possible implementation of the seventh aspect, the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

In an eighth aspect, a base station is disclosed, comprising:

a receiving unit, configured to receive a first buffer status report reported by a first user equipment, where the first buffer status report is used to indicate a size of first data and logical channel group information corresponding to the first data; the first data is data transmitted between the first user equipment and second user equipment, and the first user equipment and the second user equipment are not in a group;

an allocating unit, configured to allocate a radio resource for the first data, where the radio resource is used for data transmission between the first user equipment and the second user equipment;

a sending unit, configured to send resource configuration information to the first user equipment; the resource configuration information is used for indicating the base station to allocate the radio resource for the first data according to the first buffer status report.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the first buffer status report includes a size of the first data and identifiers of Z logical channel groups corresponding to the first data;

With reference to the first possible implementation manner of the eighth aspect, in a second possible implementation manner of the eighth aspect, the receiving unit is further configured to receive logical channel group allocation information reported by the first user equipment; the logical channel group allocation information carries index values of the Z logical channel groups.

With reference to the eighth aspect or the first possible implementation manner of the eighth aspect, in a third possible implementation manner of the eighth aspect, the MAC CE of the first buffer status report is a third MAC CE; the third MAC CE is different from the MAC CE of the third BSR,

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a prior art D2D communication;

fig. 2 is a schematic diagram of a ue relaying data provided by the present invention;

fig. 3 is a schematic diagram of a frame structure of a BSR according to embodiment 1 of the present invention;

fig. 4 is a flowchart illustrating a method for requesting link resources according to embodiment 1 of the present invention;

fig. 5 is a schematic bearer allocation diagram provided in embodiment 1 of the present invention;

fig. 6 is a schematic view of another bearer allocation provided in embodiment 1 of the present invention;

fig. 7 is a schematic view of another bearer allocation provided in embodiment 1 of the present invention;

fig. 8 is a schematic view of another bearer allocation provided in embodiment 1 of the present invention;

fig. 9 is a flowchart illustrating a method for requesting link resources according to embodiment 2 of the present invention;

fig. 10 is a block diagram of a relay user equipment according to embodiment 3 of the present invention;

fig. 11 is a block diagram of a base station according to embodiment 4 of the present invention;

fig. 12 is a block diagram of a first user equipment according to embodiment 5 of the present invention;

fig. 13 is a block diagram of a base station according to embodiment 6 of the present invention;

fig. 14 is a schematic diagram of a hardware structure according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

LTE R12 (long term evolution release 12) introduced D2D technology, i.e. UEs under base station can communicate autonomously or under the management of eNB (evolved base station), but UEs can only communicate with UEs belonging to the same group, such as UEs of police group, and if UE1 also belongs to the visitor group, UE1 also communicates with UEs of the visitor group. As shown in fig. 2, a UE in LTE R13 (UE 1 in fig. 2) can communicate not only with UEs in the same group, but also with surrounding UEs not belonging to the same group. In addition, a UE out of the coverage of the eNB may also relay data to the eNB using a UE whose periphery is within the coverage of the eNB, or the eNB may relay data to an out-of-coverage UE using an in-coverage UE.

In an LTE network, in order to ensure that an eNB can allocate UE resources to perform data transmission, the UE needs to request uplink resources from the eNB, and a general request method is that the UE sends BSR information to the eNB. And the eNB allocates resources to each logical channel group according to the data size indicated by the BSR. Specifically, the UE reports the BSR to the eNB, where the BSR includes buffer status information of the D2D link related to the UE, that is, the size of data to be transmitted by each link. The eNB allocates appropriate resources to the respective D2D links associated with the UE 1. For example, the high buffer status information (the larger the indication data in the BSR is), indicates that the UE side has more data to transmit, and the eNB needs to allocate more write resources to the UE, and conversely, allocates less resources to the UE.

The format of the BSR is shown in fig. 3, where the LCID of the MAC header characterizes the subsequent MAC CE as content related to the BSR. Illustratively, the second part of the frame header is 1001, then the second representing frame data part is the BSR. In addition, a Group index (i.e., a Group identifier) is included in the content related to the BSR, which represents a flag indicating that the UE reporting the BSR participates in the D2D communication Group. Also included is the size of data to be transmitted (buffer size) and the identification of Logical Channel Group (LCGID) determined according to the traffic characteristics of the data.

The current BSR can only be used for requesting D2D link resources by the UE, and cannot request link resources for data transmission between the UE and general UEs (UEs in different groups), nor can request link resources for relaying data of the general UEs to the base station for the UE. The present invention is directed to a method for requesting a link resource, which can request a link resource for a UE, for relaying data of a remote UE to an eNB, or for data transmission between the UE and UEs belonging to different groups.

Example 1:

the present invention provides a method for requesting link resources, as shown in fig. 4, the method includes the following steps:

101. the relay user equipment establishes a connection with the remote user equipment.

Referring to fig. 2, the UE1 is the relay user equipment and the UE3 is the remote user equipment. Namely, the relay user equipment is in the coverage of the base station, the remote user equipment is out of the coverage of the base station, and the relay user equipment and the remote user equipment do not belong to the same group. Of course, the relay ue may relay data of multiple remote ues to the base station, so that the relay ue needs to establish a connection with each remote ue that needs to relay data.

Here, the relay user equipment may obtain, from the remote user equipment, service characteristics corresponding to data that the remote user equipment needs to relay to the base station through the relay user equipment this time, that is, Qos information of the data.

102. The relay user equipment sends a connection request to the base station, and indicates the base station that the relay user equipment is to transmit data to the base station.

Wherein the data comprises relay data that a remote user equipment needs to transmit to the base station through the relay user equipment. In addition, the connection request may also carry service characteristics of the remote user equipment, such as: qos, etc.

103. And the base station receives the connection request and distributes radio bearer for the relay data. 104. The base station sends first configuration information to the user equipment.

The first configuration information is used to indicate a radio bearer allocated by the base station for the relay data and a logical channel of the radio bearer. The identification of the radio bearer may be an ID of the radio bearer, and the identification information of the logical channel of the radio bearer may be an LCGID.

105. And the relay user equipment receives first configuration information sent by the base station to generate a reported cache state report, and reports the cache state report to the base station according to the first configuration information.

The buffer status report is used for indicating the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data.

Actually, the relay user equipment determines the radio bearer and the logical channel of the radio bearer allocated by the base station for the relay data according to the first configuration information, selects the logical channel group and/or the logical channel in the relay data according to the service characteristics of the relay data, and reports the selected logical channel and/or the logical channel group and the size of the relay data to the base station through the buffer status report, so that the base station allocates the radio resource for the relay data.

In addition, the MAC CE of the cache status report is a first MAC CE; wherein the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station. That is, the MAC CE of the buffer status report may be the same as the MAC CE of the existing BSR (i.e., the first BSR in the present invention), that is, it should be noted that the MAC CE of the buffer status report is an identifier in a packet header, and is used to indicate what data is a packet data part. Illustratively, the fourth MAC CE of the header is 1001, and the fourth MAC CE of the data portion is a BSR.

106. and the base station receives the buffer status report and allocates wireless resources for the relay data according to the buffer status report.

107. And the base station sends second configuration information to the relay user equipment.

And the second configuration information carries information of the wireless resources allocated to the relay user equipment by the base station according to the buffer status report.

108. And the relay user equipment sends the relay data to the base station through the wireless resource distributed to the relay user equipment by the base station.

It should be noted that the bearer is a higher layer, and the logical channels are data processing channels carried in the MAC layer, that is, one bearer corresponds to one logical channel. And the logical channel group includes a plurality of logical channels. The radio resources are radio time-frequency resources.

When the relay user equipment needs to forward data for one or more remote user equipments, the above step 103 is described in detail with reference to fig. 5 to 8:

firstly, the wireless bearer allocated by the base station for the relay data is one of the bearers between the relay user equipment and the base station.

For example, referring to fig. 5, when the relay user equipment needs to forward data to the base station for UE1 and UE2, the base station allocates one radio bearer (for the bearer between the base station and the relay user equipment) for the relay data of UE1 and UE2 (i.e., the data that needs to be relayed to the base station by the relay user equipment).

That is, when the relay user forwards data to the base station for the one or more remote user equipments, a bearer is shared. And this bearer may be a radio bearer or a core network level bearer.

Here, the logical channel group includes a plurality of logical channels with the same bearer service, and after the base station allocates the logical channel group to the relay data, it needs to indicate the priority of each logical channel in the logical channel group of the relay user equipment, so that the relay user equipment can select a suitable logical channel.

And secondly, the base station distributes the wireless load for the relay data to X load in the loads between the relay user equipment and the base station. The X bearers are determined according to the properties of the remote bearers.

The remote bearer is a bearer between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different.

For example, referring to fig. 6, the relay user equipment needs to forward data to the base station for UE1 and UE2, UE1 and UE2 correspond to RB1 and RB2, respectively, and RB1 and RB2 are two bearers with different attributes, so that the base station allocates 2 radio bearers for relay data of UE1 and UE2, which correspond to RB1 and RB2, respectively.

Thirdly, the base station distributes the wireless load for the relay data to Y load in the loads between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different.

That is, when the relay ue forwards data to the base station for the one or more remote ues, one bearer is allocated to the data of each remote ue.

For example, referring to fig. 7, if the relay user equipment needs to forward data to the base station for UE1 and UE2, there are two remote user equipments in total, so the base station allocates 2 radio bearers for the relay data of UE1 and UE2, which correspond to the data of UE1 and UE2, respectively.

And fourthly, the base station distributes the wireless load for the relay data to Q loads in the loads between the relay user equipment and the base station. The Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, and Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment.

For example, referring to fig. 8, the relay user equipment needs to forward data to the base station for UE1 and UE2, UE1 and UE2 correspond to RB1 and RB2, respectively, and RB1 and RB2 are two bearers with different attributes, so that the base station allocates 2 radio bearers for relay data of UE1 and UE2, which correspond to RB1 and RB2, respectively.

It should be noted that the logical channel allocated by the base station for the relay data may be a logical channel corresponding to an existing BSR (i.e., for requesting link resources for data transmission between the base station and the UE and data transmission between the UE and the UE in the same group), or a logical channel group may be newly set for the relay data, that is, the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

According to the link resource request method provided by the invention, the relay user equipment sends a connection request to the base station aiming at the remote user equipment, and the base station distributes corresponding load and a logic channel group for relay data. And the relay user equipment reports the buffer status report to the base station according to the load allocated by the base station so that the base station allocates wireless resources for the relay data. In the prior art, the BSR is only applicable to the UE requesting D2D link resources, that is, the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and relay the data of the remote UE to the eNB.

Example 2:

an embodiment of the present invention further provides a method for requesting link resources, as shown in fig. 9, where the method includes the following steps:

201. the first user equipment reports a first cache report and a first cache state report to the base station.

The first buffer report is used for indicating the size of first data and logical channel group information corresponding to the first data; the first user equipment and the second user equipment are not in a group. In the embodiment of the present invention, the logical channel group is actually a logical channel belonging to a D2D group.

In addition, the first buffer status report includes the size of the first data and the identifier of the Z logical channel groups corresponding to the first data. That is, the first user equipment determines a corresponding logical channel group according to the service characteristics of the first data, and reports the size of the first data and the identifier of the determined logical channel group to the base station.

The logical channel group corresponding to the first data may be one or more of the logical channel groups corresponding to the existing BSRs (i.e., the third BSRs), and therefore, the first buffer status report further includes: identification information of the N logical channel groups; the N logical channel groups are logical channel groups except the Z-th logical channel group among M logical channel groups corresponding to the third BSR; wherein the third BSR is configured for the first user equipment to request link resources for data transmission between the first user equipment and the third user equipment; the third user equipment and the first user equipment belong to the same group. That is, the existing BSR can request link resources for data transmission between the UE and the UEs in the same group. The MAC CE of the first cache state report of the first cache report is a third MAC CE; the third MAC CE is different from the MAC CE of the third BSR. Wherein the third BSR is further configured to request link resources for relay data; the relay data is data which is required to be forwarded to the base station by the remote user equipment through the first user equipment.

202. The base station receives a first cache state report reported by the first user equipment.

203. The base station allocates radio resources for the first data.

The wireless resource is used for data transmission between the first user equipment and the second user equipment.

204. And the first user equipment performs data transmission with second user equipment through the wireless resource allocated to the first data by the base station.

In addition, after step 205, step 206 may also be included.

206. The first user equipment reports the distribution information of the logical channel group to the base station; the logical channel group allocation information carries index values of the Z logical channel groups.

According to the method for requesting the link resource, the first user equipment reports the buffer status report to the base station aiming at the second user equipment (different from the first user equipment in a group), so that the base station allocates the wireless resource for data transmission between the first user equipment and the second user equipment. In the prior art, the BSR is only applicable to the UE requesting D2D link resources, that is, the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and be used for data transmission between the UE and the UEs belonging to different groups.

Example 3:

an embodiment of the present invention provides a relay user equipment, as shown in fig. 10, where the relay user equipment includes: transmission section 301, reception section 302, and generation section 303.

A transmitting unit 301 configured to transmit a connection request to a base station; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, wherein the data comprises relay data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group.

A receiving unit 302, configured to receive first configuration information sent by the base station; the first configuration information is used to indicate a radio bearer allocated by the base station for the relay data and a logical channel group of the radio bearer.

A generating unit 303, configured to generate a buffer status report according to the first configuration information, and report the buffer status report to the base station; the buffer status report is used for indicating the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data.

The sending unit 301 is further configured to report the buffer status report to the base station.

The receiving unit 302 is further configured to receive second configuration information sent by the base station; and the second configuration information carries the information of the wireless resources allocated to the relay user equipment by the base station according to the cache state report.

The sending unit 303 is further configured to send the relay data to the base station through the radio resource allocated by the base station to the relay user equipment.

It should be noted that the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

And if the relay user equipment needs to forward data for one or more remote user equipments, the radio bearer allocated for the relay data is one of the bearers between the relay user equipment and the base station.

If the relay user equipment needs to forward data for one or more remote user equipments, the radio bearer allocated for the relay data is X bearers in bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different.

If the relay user equipment needs to forward data for one or more remote user equipments, the radio bearer allocated for the relay data is Y bearers in the bearers between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different.

If the relay user equipment needs to forward data for one or more remote user equipments, the radio bearer allocated for the relay data is Q bearers in the bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, and Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment.

In addition, the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups. The logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

The relay user equipment sends a connection request to the base station aiming at the remote user equipment, and the base station distributes corresponding load and a logic channel group for relay data. And the relay user equipment reports the buffer status report to the base station according to the load allocated by the base station so that the base station allocates wireless resources for the relay data. In the prior art, the BSR is only applicable to the UE requesting D2D link resources, that is, the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and relay the data of the remote UE to the eNB.

Example 4:

an embodiment of the present invention provides a base station, as shown in fig. 11, where the base station includes: receiving section 401, assigning section 402, and transmitting section 403.

A receiving unit 401, configured to receive a connection request sent by a relay user equipment; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, and the data comprises data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group.

An allocating unit 402, configured to allocate a radio bearer for the relay data, and send first configuration information to the relay user equipment; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel of the radio bearer.

The receiving unit 401 is further configured to receive a buffer status report reported by the relay user equipment, where the buffer status report is used to indicate the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data.

The allocating unit 402 is further configured to allocate radio resources to the relay user equipment according to the buffer status report.

A sending unit 403, configured to send second configuration information to the user equipment; the second configuration information carries information of radio resources allocated by the base station to the relay user equipment.

The receiving unit 401 is further configured to receive the relay data sent by the relay user equipment through the radio resource.

It should be noted that the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station.

If the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit 402 is specifically configured to allocate a radio bearer for the relay data as one of bearers between the relay user equipment and the base station;

If the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit 402 is specifically configured to allocate radio bearers for the relay data as X bearers out of bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

If the relay ue needs to forward data for one or more remote ues, the allocating unit 402 is specifically configured to allocate radio bearers for the relay data as Y bearers among bearers between the relay ue and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

If the relay user equipment needs to forward data for one or more remote user equipments, the allocating unit 402 is specifically configured to allocate radio bearers for the relay data as Q bearers among bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

The base station provided by the invention receives the connection request sent by the relay user equipment to the base station aiming at the remote user equipment, and distributes the corresponding load and the logical channel group for the relay data. And receiving a buffer status report reported by the relay user equipment, and allocating wireless resources for the relay data. In the prior art, the BSR is only applicable to the UE requesting D2D link resources, that is, the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and relay the data of the remote UE to the eNB.

Example 6:

an embodiment of the present invention provides a first user equipment, and as shown in fig. 12, the first user equipment includes: a transmitting unit 501, a receiving unit 502, and a determining unit 503.

A sending unit 501, configured to report a first buffer status report to a base station, where the first buffer status report is used to indicate a size of first data and logical channel group information corresponding to the first data; the first user equipment and the second user equipment are not in a group.

A receiving unit 502, configured to receive resource configuration information sent by the base station; the resource configuration information is used for indicating the base station to allocate radio resources for the first data according to the first buffer status report;

a determining unit 503, configured to determine, according to the resource configuration information, a radio resource allocated by the base station for the first data;

It should be noted that the first buffer status report includes the size of the first data and the identifier of Z logical channel groups corresponding to the first data; the first cache status report further comprises: identification information of the N logical channel groups; the N logical channel groups are logical channel groups except the Z-th logical channel group among the M logical channel groups corresponding to the third BSR.

The sending unit 501 is further configured to report logical channel group allocation information to the base station; the logical channel group allocation information carries index values of the Z logical channel groups.

In addition, the MAC CE of the first cache status report is a third MAC CE; the third MAC CE is different from the MAC CE of the third BSR,

The first user equipment reports the buffer status report to the base station aiming at the second user equipment (different from the first user equipment in a group) so that the base station allocates wireless resources for data transmission between the first user equipment and the second user equipment. In the prior art, the BSR is only applicable to the UE requesting D2D link resources, that is, the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and be used for data transmission between the UE and the UEs belonging to different groups.

Example 7:

an embodiment of the present invention provides a base station, as shown in fig. 13, where the base station includes: receiving section 601, assigning section 602, and transmitting section 603.

A receiving unit 601, configured to receive a first buffer status report reported by a first user equipment, where the first buffer status report is used to indicate a size of first data and logical channel group information corresponding to the first data; the first data is data transmitted between the first user equipment and second user equipment, and the first user equipment and the second user equipment are not in a group.

An allocating unit 602, configured to allocate a radio resource for the first data, where the radio resource is used for data transmission between the first user equipment and the second user equipment.

A sending unit 603, configured to send resource configuration information to the first user equipment; the resource configuration information is used for indicating the base station to allocate the radio resource for the first data according to the first buffer status report.

It should be noted that the first buffer status report includes the size of the first data and the identifier of the Z logical channel groups corresponding to the first data.

The receiving unit 601 is further configured to receive logical channel group allocation information reported by the first user equipment; the logical channel group allocation information carries index values of the Z logical channel groups.

In addition, the MAC CE of the first cache status report is a third MAC CE; the third MAC CE is different from a MAC CE of the third BSR, wherein the third BSR is further configured to request link resources for relay data; the relay data is data which is required to be forwarded to the base station by the remote user equipment through the first user equipment.

The base station provided by the invention receives the buffer status report reported by the first user equipment aiming at the second user equipment (different from the first user equipment in a group), and allocates wireless resources for data transmission between the first user equipment and the second user equipment. In the prior art, the BSR is only applicable to the UE requesting D2D link resources, that is, the UE requests link resources for itself and UEs in the group. Or, the UE can only request link resources for data transmission between itself and the eNB using the BSR. The UE cannot request link resources from the base station for relaying data of the remote UE to the base station. The invention can report the buffer status report to the base station, request link resources for the UE and be used for data transmission between the UE and the UEs belonging to different groups.

In addition, it should be noted that in this embodiment of the present invention, the sending unit included in the user equipment (or the base station) may be a transmitter of the user equipment (or the base station), the receiving unit included in the user equipment (or the base station) may be a receiver of the user equipment (or the base station), referring to fig. 14 additionally, the transmitter may be integrated with the receiver to form a transceiver. The generating unit 303, the allocating unit 402, the determining unit 503 and the allocating unit 602 may be processors separately set up, or may be implemented by being integrated into a processor of the user equipment (or the base station), or may be stored in a memory of the user equipment (or the base station) in the form of program codes, and the processor of the user equipment (or the base station) calls and executes the functions of the above encrypting unit.

The processor may be a Central Processing Unit (CPU) or an Application Specific Integrated Circuit (ASIC).

A memory for storing program code and transmitting the program code to the processor, the processor executing the following instructions according to the program code. The memory may include a volatile memory (RAM), such as a random-access memory (RAM); the memory may also include a non-volatile memory (ROM), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a solid-state drive (SSD). The memory may also comprise a combination of memories of the kind described above. The processor, the memory and the transmitter are connected through a system bus and complete mutual communication.

The transmitter may be implemented by an optical transmitter, an electrical transmitter, a wireless transmitter, or any combination thereof. For example, the optical transmitter may be a small form-factor pluggable (SFP) transmitter, an enhanced small form-factor pluggable (SFP) transmitter, or a 10Gigabit small form-factor (XFP) transmitter. The electronic transmitter may be an Ethernet (Ethernet) Network Interface Controller (NIC). The wireless transmitter may be a Wireless Network Interface Controller (WNIC).

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the present invention may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for requesting link resources, comprising:

the relay user equipment sends a connection request to the base station; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, wherein the data comprises relay data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group;

the relay user equipment receives first configuration information sent by the base station; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel group of the radio bearer;

the relay user equipment generates a buffer status report according to the first configuration information and reports the buffer status report to the base station, wherein the buffer status report is used for indicating the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data;

the relay user equipment receives second configuration information sent by the base station; the second configuration information carries information of wireless resources allocated to the relay user equipment by the base station according to the cache status report;

2. The method of claim 1, wherein the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

3. The method according to claim 1 or 2, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearer allocated for the relay data is one of the bearers between the relay user equipment and the base station;

4. The method according to claim 1 or 2, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearers allocated for the relay data are X bearers out of the bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

5. The method according to claim 1 or 2, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearers allocated for the relay data are Y bearers out of the bearers between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

6. The method according to claim 1 or 2, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearers allocated for the relay data are Q bearers among the bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

7. The method of claim 2, wherein the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

8. The method of claim 2, wherein the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

9. A method for requesting link resources, comprising:

a base station receives a connection request sent by relay user equipment; the connection request is used for indicating that the relay user equipment is to transmit data to the base station, and the data comprises data which is required to be transmitted to the base station by remote user equipment through the relay user equipment; the relay user equipment and the remote user equipment do not belong to the same group;

the base station distributes radio bearer for the relay data and sends first configuration information to the relay user equipment; the first configuration information is used for indicating a radio bearer allocated by the base station for the relay data and a logical channel of the radio bearer;

the base station receives a buffer status report reported by the relay user equipment, wherein the buffer status report is used for indicating the size of the relay data and a logical channel and/or a logical channel group corresponding to the relay data;

and the base station receives the relay data sent by the relay user equipment through the wireless resource.

10. The method of claim 9, wherein the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

11. The method according to claim 9 or 10, wherein if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically comprises:

12. The method according to claim 9 or 10, wherein if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically comprises:

13. The method according to claim 9 or 10, wherein if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically comprises:

14. The method according to claim 9 or 10, wherein if the relay user equipment needs to forward data for one or more remote user equipments, the allocating, by the base station, a radio bearer for the relay data specifically comprises:

15. The method of claim 10, wherein the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

16. The method of claim 10, wherein the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

17. A relay user equipment, comprising:

18. The relay user equipment according to claim 17, wherein the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

19. The relay user equipment according to claim 17 or 18, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearer allocated for the relay data is one of the bearers between the relay user equipment and the base station;

20. The relay user equipment according to claim 17 or 18, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearers allocated for the relay data are X bearers out of the bearers between the relay user equipment and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

21. The relay user equipment according to claim 17 or 18, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearers allocated for the relay data are Y bearers out of the bearers between the relay user equipment and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

22. The relay user equipment according to claim 17 or 18, wherein if the relay user equipment needs to forward data for one or more of the remote user equipments, the radio bearers allocated for the relay data are Q bearers among the bearers between the relay user equipment and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

23. The relay user equipment of claim 18, wherein the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

24. The relay user equipment of claim 18, wherein the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.

25. A base station, comprising:

26. The base station of claim 25, wherein the MAC CE of the buffer status report is a first MAC CE; the first MAC CE is configured to indicate a first BSR, where the first BSR is used for requesting, by the relay user equipment, link resources for forwarding the relay data, and is used for requesting, by the relay user equipment, link resources for data transmission between the relay user equipment and the base station;

27. The base station according to claim 25 or 26, wherein if the relay ue needs to forward data for one or more remote ues, the allocating unit is specifically configured to allocate a radio bearer for the relay data as one of the bearers between the relay ue and the base station;

28. The base station according to claim 25 or 26, wherein if the relay ue needs to forward data for one or more remote ues, the allocating unit is specifically configured to allocate radio bearers for the relay data as X bearers out of bearers between the relay ue and the base station; the X bearers are determined according to the attributes of the remote bearers, the remote bearers are the bearers between the remote user equipment and the relay user equipment, X remote bearers with different attributes exist between the relay user equipment and the remote user equipment, and the X bearers are different;

29. The base station according to claim 25 or 26, wherein if the relay ue needs to forward data for one or more remote ues, the allocating unit is specifically configured to allocate radio bearers for the relay data as Y bearers out of bearers between the relay ue and the base station; the Y bearers are determined according to the number of the remote user equipment, the Y is the number of the remote user equipment, and the Y bearers are all different;

30. The base station according to claim 25 or 26, wherein if the relay ue needs to forward data for one or more remote ues, the allocating unit is specifically configured to allocate radio bearers for the relay data as Q bearers out of the bearers between the relay ue and the base station; the Q bearers are determined according to the number of remote bearers between the one or more remote user equipments and the relay user equipment, where Q is the number of remote bearers between the one or more remote user equipments and the relay user equipment;

31. The base station of claim 26, wherein the logical channel group is any one of N logical channel groups corresponding to the first BSR; or, the logical channel group is different from the N logical channel groups.

32. The base station of claim 26, wherein the logical channel is any one of T logical channels corresponding to the first BSR; or, the logical channel is different from the T logical channels.