WO2017113394A1

WO2017113394A1 - Data transmission method and device

Info

Publication number: WO2017113394A1
Application number: PCT/CN2015/100315
Authority: WO
Inventors: 魏冬冬; 周国华; 张弛; 王轶
Original assignee: 华为技术有限公司
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2017-07-06

Abstract

The present invention relates to the technical field of communications and discloses a data transmission method and device in embodiments thereof, and can solve the problem of inconvenience to a user in which when a second terminal malfunctions or a connection with the second terminal is disconnected, uplink information of a first terminal cannot be transmitted to a base station resulting in service interruption of the first terminal. The method of the present invention is applied to a base station and a system composed of a first terminal and at least two second terminals. The first terminal and the at least two second terminals belong to a multicast group established by the base station. The at least two second terminals are used to forward uplink information transmitted by the first terminal to the base station. The at least two second terminals receive the uplink information transmitted by the first terminal, the uplink information being transmitted to the at least two second terminals at the same time by the first terminal. The at least two second terminals transmit the uplink information to the base station respectively to facilitate processing the uplink information by the base station.

Description

Data transmission method and device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background technique

With the popularization of intelligent terminals, the number of intelligent terminals in the network is experiencing an explosive growth phase. In order to reduce the network load, D2D (Device-to-Device) communication technology is introduced, that is, the proximity terminals are not implemented. A technology that uses third-party direct communication. Especially for a terminal at the edge of the network coverage, limited by the maximum transmit power of the terminal, and the uplink quality between the base station and the base station is poor, the first terminal at the edge of the network coverage may transmit the information to the base station to the first through the D2D technology. The second terminal forwards the second terminal to the base station to improve network coverage.

However, in the prior art, only the first terminal can perform relaying at the same time. If the second terminal fails or the connection with the second terminal is disconnected, the uplink information of the first terminal cannot be sent to the base station. In addition, the service of the first terminal is interrupted, which brings inconvenience to the user.

Summary of the invention

The embodiment of the present invention provides a method and an apparatus for data transmission, which can solve the problem that the second terminal is faulty or disconnected from the second terminal, and the uplink information of the first terminal cannot be sent to the base station, thereby causing the service of the first terminal. Interruption, causing inconvenience to the user.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a data transmission method, including:

The second terminal receives the uplink information sent by the first terminal, where the uplink information is sent by the first terminal to the second terminal, and the first terminal and the at least two second terminals belong to one established by the base station. a multicast group, at least two of the second terminals are configured to forward uplink information sent by the first terminal to the base station;

The second terminal sends the uplink information to the base station.

In conjunction with the first aspect, in a first implementation of the first aspect, the second terminal is connected Before receiving the information sent by the first terminal, the method further includes:

The second terminal receives the group information sent by the base station, where the group information is allocated by the base station to the multicast group, and the group information is used to distinguish the multicast group established by the base station.

With the first implementation of the first aspect, in a second implementation manner of the first aspect, before the sending, by the second terminal, the uplink information to the base station, the method further includes:

The second terminal sends a buffer status report BSR carrying the group information to the base station. In this implementation manner, when receiving the BSR, the base station may obtain the group information, and then determine that the uplink information transmitted by the second terminal is sent by the first terminal, so as to be used when the subsequent base station performs feedback according to the uplink information. The first terminal performs.

With the second implementation of the first aspect, in a third implementation manner of the first aspect, before the second terminal sends the BSR that carries the group information to the base station, the method further includes:

The second terminal adds a preset media access control MAC sub-header to the BSR, where the preset MAC sub-header is used to indicate that the BSR carries the group information. In this implementation manner, after receiving the BSR, the base station can determine whether the group information is carried in the BSR by using the MAC sub-header.

With reference to the first aspect, in a fourth implementation manner of the first aspect, before the sending, by the second terminal, the uplink information to the base station, the method further includes:

The second terminal generates a redundancy version according to the uplink information, respectively.

The sending, by the second terminal, the uplink information to the base station includes:

The second terminal sends a respective generated redundancy version to the base station.

In a second aspect, an embodiment of the present invention provides a data transmission method, including:

The base station receives the uplink information that is sent by the at least two second terminals, where the uplink information is sent by the first terminal to the at least two second terminals, the first terminal and the at least two The second terminal belongs to a multicast group established by the base station, and the at least two second terminals are configured to forward uplink information sent by the first terminal to the base station;

The base station processes the uplink information.

In conjunction with the second aspect, in a first implementation of the second aspect, the base station receives Before the uplink information sent by the at least two second terminals, the method further includes:

The base station allocates group information for the multicast group, and the group information is used to distinguish a multicast group established by the base station;

The base station sends the group information to the at least two second terminals. In this implementation manner, when the second terminal needs to send the uplink information of the first terminal to the base station, the buffer status report BSR carrying the group information is sent to the base station, so as to indicate that the second terminal sends the uplink information to the base station. Forwarded by the terminal.

With the first implementation of the second aspect, in a second implementation manner of the second aspect, before the receiving, by the base station, the uplink information that is sent by the at least two second terminals, the method further includes:

Receiving, by the base station, a buffer status report BSR that carries the group information sent by the at least two second terminals;

The base station determines, according to the group information, that the uplink information is sent by the first terminal.

With reference to the second implementation manner of the second aspect, in a third implementation manner of the second aspect, before the determining, by the base station, that the uplink information is sent by the first terminal according to the group information, the method Also includes:

Obtaining, by the base station, a media access control MAC subheader of the BSR;

The base station determines, according to the MAC sub-header, whether the BSR carries the group information.

With reference to the second aspect, in a fourth implementation manner of the second aspect, the receiving, by the base station, the uplink information that is sent by the at least two second terminals includes:

Receiving, by the base station, a redundancy version sent by the at least two second terminals, where the redundancy version is generated by the at least two second terminals according to the uplink information, where the at least two second terminals respectively The generated redundancy versions are the same, or the redundancy versions generated by the at least two second terminals are different;

The processing, by the base station, the uplink information includes:

The base station merges the received redundancy versions.

The base station combines the received redundancy versions to improve the quality of the received signals of the base station. The number of low signal retransmissions, which in turn improves the reliability of data transmission.

In a third aspect, an embodiment of the present invention provides a device for data transmission, where a first terminal and at least two second terminals belong to a multicast group established by a base station, and the at least two second terminals are configured to forward the The uplink information sent by the terminal to the base station, where the device is any one of the at least two second terminals, including:

a receiving unit, configured to receive uplink information sent by the first terminal, where the uplink information is sent by the first terminal to the at least two second terminals;

And a sending unit, configured to send the uplink information to the base station.

With reference to the third aspect, in a first implementation manner of the third aspect, the receiving unit is further configured to receive group information that is sent by the base station, where the group information is allocated by the base station to the multicast group, The group information is used to distinguish a multicast group established by the base station.

With reference to the first implementation manner of the third aspect, in a second implementation manner of the third aspect, the sending unit is further configured to send, to the base station, a buffer status report BSR that carries the group information. When the base station receives the BSR, the base station can obtain the group information, and then determine that the uplink information transmitted by the second terminal is sent by the first terminal, so as to be performed for the first terminal when the subsequent base station performs feedback according to the uplink information.

With reference to the second embodiment of the third aspect, in a third implementation manner of the third aspect, the device further includes:

And an adding unit, configured to add a preset media access control MAC sub-header to the BSR, where the preset MAC sub-header is used to indicate that the group information is carried in the BSR.

After receiving the BSR, the base station can determine whether the group information is carried in the BSR through the MAC sub-header.

In conjunction with the third aspect, in a fourth implementation manner of the third aspect, the device further includes:

a generating unit, configured to generate a redundancy version according to the uplink information, where the redundancy versions generated by the at least two second terminals are the same, or the redundancy versions generated by the at least two second terminals are different;

The sending unit is further configured to send the generated redundancy version to the base station.

In a fourth aspect, an embodiment of the present invention provides a device for data transmission, where a first terminal and at least two second terminals belong to a multicast group established by a base station, and the at least two second terminals are configured to forward the The uplink information sent by the terminal to the base station, where the device is the base station, including:

a receiving unit, configured to receive the uplink information sent by the at least two second terminals, where the uplink information is sent by the first terminal to the at least two second terminals;

a processing unit, configured to process the uplink information.

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

An allocating unit, configured to allocate group information for the multicast group, where the group information is used to distinguish a multicast group established by the base station;

And a sending unit, configured to send the group information to the at least two second terminals.

In this manner, when the second terminal needs to send the uplink information of the first terminal to the base station, the buffer status report BSR carrying the group information is sent to the base station, so as to indicate that the second terminal forwards the uplink information to the base station.

With reference to the first implementation manner of the fourth aspect, in a second implementation manner of the fourth aspect, the receiving unit is further configured to receive, by the at least two second terminals, a buffer status report that carries the group information BSR; the device further includes:

And a determining unit, configured to determine, according to the group information, that the uplink information is sent by the first terminal.

With reference to the second embodiment of the fourth aspect, in a third implementation manner of the fourth aspect, the device further includes:

An acquiring unit, configured to acquire a media access control MAC subheader of the BSR;

The determining unit is further configured to determine, according to the MAC sub-header, whether the group information is carried in the BSR.

With reference to the fourth aspect, in a fourth implementation manner of the fourth aspect, the receiving unit is further configured to receive a redundancy version that is sent by the at least two second terminals, where the redundancy version is the at least two The second terminal is respectively generated according to the uplink information, and the at least two second terminals respectively The generated redundancy versions are the same, or the redundancy versions generated by the at least two second terminals are different;

The processing unit is further configured to merge the received redundancy versions. The base station combines the received redundancy versions to improve the quality of the received signals of the base station and reduce the number of signal retransmissions, thereby improving the reliability of data transmission.

A method and an apparatus for data transmission according to an embodiment of the present invention. In the embodiment of the present invention, a base station establishes a multicast group consisting of a first terminal and at least two second terminals. When the first terminal needs to transmit uplink information to the base station, The at least two second terminals simultaneously receive the uplink information sent by the first terminal; and then the at least two second terminals respectively forward the uplink information sent by the first terminal to the base station, so as to facilitate the uplink information sent by the base station to the first terminal. Process it. As such, in the embodiment of the present invention, for the terminal at the edge of the network coverage, the uplink information may be transmitted to the base station through multiple second terminals at the same time, and even if the second terminal is faulty or disconnected from the second terminal, the uplink information is also The second terminal that is not connected to the terminal and is connected to the terminal can be forwarded to the base station side, so that the number of uplink information retransmissions is reduced, and the uplink information of the terminal cannot be sent to the base station, thereby causing service interruption of the terminal, which causes inconvenience to the user. .

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only the present invention. In some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

FIG. 1 is a schematic structural diagram of a system according to an embodiment of the present disclosure;

2 is a flowchart of a method according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method according to an embodiment of the present invention;

4 is a flowchart of a method according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a BSR according to another embodiment of the present invention; FIG.

6 and FIG. 7 are schematic structural diagrams of a device according to another embodiment of the present invention;

8 and FIG. 9 are schematic structural diagrams of a device according to another embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a terminal according to another embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a base station according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to make the advantages of the technical solutions of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

In the embodiment of the present invention, the base station establishes a plurality of multicast groups, and the first terminal and the at least two second terminals belong to a multicast group established by the base station, and in the multicast group, the second terminal is configured to send the first terminal to the base station. The sent uplink information is forwarded to the base station, where the first terminal and the second terminal in the embodiment of the present invention both include a UE (User Equipment). For example, as shown in FIG. 1, UE1, UE2, UE3, and UE4 belong to a multicast group established by a base station, UE1, UE2, and UE3 are second terminals in a multicast group, and UE4 is a first terminal in a multicast group. UE1, UE2, and UE3 forward the uplink information that UE4 needs to send to the base station for UE4.

An embodiment of the present invention provides a data transmission method. As shown in FIG. 2, the method includes:

101. The second terminal receives the uplink information sent by the first terminal.

The uplink information is sent by the first terminal to the at least two second terminals, that is, when the first terminal needs to send uplink information to the base station, the uplink information is sent to the second terminal in the multicast group. The first terminal and the at least two second terminals belong to a multicast group established by the base station, and the at least two second terminals are configured to forward the uplink information sent by the first terminal to the base station.

102. The second terminal sends uplink information to the base station.

It should be noted that, in the embodiment of the present invention, the first terminal transmits uplink information to the base station by using multiple second terminals, and the base station can be improved by forwarding through a single second terminal in the prior art. Receive the quality of the signal, which in turn improves the reliability of data transmission.

In the embodiment of the present invention, the base station establishes a multicast group consisting of the first terminal and the at least two second terminals. When the first terminal needs to transmit uplink information to the base station, at least two second terminals simultaneously receive the first terminal. And the at least two second terminals respectively forward the uplink information sent by the first terminal to the base station, so that the base station processes the uplink information sent by the first terminal. As such, in the embodiment of the present invention, for the terminal at the edge of the network coverage, the uplink information may be transmitted to the base station through multiple second terminals at the same time, and even if the second terminal is faulty or disconnected from the second terminal, the uplink information is also The second terminal that is not connected to the terminal and is connected to the terminal can be forwarded to the base station side, so that the number of uplink information retransmissions is reduced, and the uplink information of the terminal cannot be sent to the base station, thereby causing service interruption of the terminal, which causes inconvenience to the user. .

An embodiment of the present invention provides a data transmission method. As shown in FIG. 3, the method includes:

201. The base station receives the uplink information sent by at least two second terminals.

The uplink information is sent by the first terminal to the at least two second terminals, and the at least two second terminals are sent to the base station after receiving the uplink information sent by the first terminal. The first terminal and the at least two second terminals belong to a multicast group established by the base station, and the at least two second terminals are configured to forward the uplink information sent by the first terminal to the base station.

202. The base station processes the uplink information.

After receiving the uplink information sent by the second terminal, the base station performs corresponding processing, for example, selecting a signal with the best quality for demodulation.

It should be noted that, in the embodiment of the present invention, the first terminal transmits the uplink information to the base station by using the multiple second terminals. Compared with the prior art, the quality of the received signal of the base station can be improved, and the data is improved. The reliability of the transmission.

In the embodiment of the present invention, the base station establishes a multicast group composed of the first terminal and the at least two second terminals. When the first terminal needs to transmit uplink information to the base station, the uplink information is simultaneously sent to the at least two second terminals; The at least two second terminals respectively forward the uplink information sent by the first terminal to the base station, and the base station separately receives the uplink information sent by the at least two second terminals, and then performs the uplink information. deal with. As such, in the embodiment of the present invention, for the terminal at the edge of the network coverage, the uplink information may be transmitted to the base station through multiple second terminals at the same time, and even if the second terminal is faulty or disconnected from the second terminal, the uplink information is also The second terminal that is not connected to the terminal and is connected to the terminal can be forwarded to the base station side, so that the number of uplink information retransmissions is reduced, and the uplink information of the terminal cannot be sent to the base station, thereby causing service interruption of the terminal, which causes inconvenience to the user. .

A further embodiment of the present invention provides a data transmission method. As shown in FIG. 4, the method includes:

301. A base station establishes a multicast group.

The multicast group includes the first terminal and the at least two second terminals, and the at least two second terminals are used to forward the uplink information sent by the first terminal to the base station. The embodiment shown in FIG. 1 is taken as an example.

It should be noted that the base station allocates the first terminal and the at least two second terminals to one group, which is called a multicast group. In the multicast group, the first terminal and the second terminal may perform signal transmission by using a broadcast manner. The base station can establish multiple multicast groups, and different multicast groups are distinguished by different identifiers.

302. The base station allocates group information for the multicast group.

The group information is used to identify uplink information that the UE4 sends to the base station through the UE1, the UE2, and the UE3.

303. The base station sends group information to UE1, UE2, and UE3.

The base station sends the group information to the multicast group, and then sends the group information to the UE1, the UE2, and the UE3.

304. When the UE4 needs to send uplink information to the base station, the UE4 sends uplink information to the UE1, the UE2, and the UE3 at the same time.

305. The UE1, the UE2, and the UE3 send a BSR carrying the group information to the base station.

The UE1, the UE2, and the UE3 send a BSR (Buffer Status Report) carrying the group information to the base station, and the base station can determine, according to the group information, that the uplink information sent by the UE1, the UE2, and the UE3 to the base station is sent by the UE4, that is, the base station. The source of the uplink information may be determined according to the BSR carrying group information, and the UE list for performing cross-UE data combining is obtained.

It should be noted that the base station receives through different second terminals, namely, UE1, UE2, and UE3. The UE4 needs to send uplink information to the base station, that is, the base station receives data across the UE. After receiving the data across the UE, the base station may combine the data and then process the data, that is, cross-UE data combining.

The manner in which the BSR includes the multicast group information may be added to the idle field of the BSR or the new field in the BSR carries the group information. For example, as shown in FIG. 5, the BSR carries the group information, where R Represents a reserved field. In order to distinguish the BSR from other control information in the MAC (Medium Access Control) sub-header, a new LCID (Logical Channel Identifier) may be defined for the BSR carrying the group information, for example, 10101 represents a BSR carrying group information.

306. The base station determines, according to the MAC sub-header of the BSR, the BSR carrying group information.

After receiving the BSR sent by the UE1, the UE2, and the UE3, the base station may determine the type of the BSR according to the MAC sub-header of the BSR. For example, the LCID of the MAC sub-header is 10101. The base station may determine that the BSR is a BSR carrying the group information.

307. The base station determines, according to the group information carried by the BSR, that the information sent by the UE1, the UE2, and the UE3 is the uplink information of the UE4.

After the BSR is determined to be the BSR carrying the group information, the base station can determine the multicast group corresponding to the group information and the identifier of the terminal in the multicast group according to the group information carried in the BSR, and determine that the information sent by the UE1, the UE2, and the UE3 is the UE4. Uplink information.

It should be noted that the base station may also allocate time-frequency resources to the UE1, the UE2, and the UE3 according to the group information carried by the BSR, so that the UE1, the UE2, and the UE3 transmit the uplink information of the UE4 according to the allocated time-frequency resources, and the base station may be in the Signal merging across terminals is performed on allocated time-frequency resources.

308. The base station sends DCI (Downlink Control Information) to the UE1, the UE2, and the UE3.

The DCI carries the resources used by the UE1, the UE2, and the UE3 to send uplink information. For example, the base station allocates the same or different time-frequency resources to the UE1, the UE2, and the UE3 through the DCI to send the uplink information, and the base station performs data merging across the UE on the allocated time-frequency resources.

Specifically, the base station allocates the same time-frequency resource for the UE1, the UE2, and the UE3, that is, the same MCS (Modulation and Coding Scheme), and can be sent to the UE1 in the multicast group. The UE2 and the UE3 each allocate a DCI, but limit the resource allocation domain and the MCS indication domain in the DCI to be implemented. The DCI that is scrambled by using the group-Radio Network Temporary Identifier (group-RNTI) may also be used to indicate. That is, each multicast group is assigned only one DCI, and the group-RNTI can be notified in the establishment of the multicast group. The base station may also allocate the same DMRS (Demodulation Reference Signal) to the UE1, the UE2, and the UE3. The DMRS sequence is determined mainly by a base sequence (for example, a Zad-off sequence) and a cyclic shift in the DCI (cyclic shift). The domain is determined, and the determination of the base sequence is determined by some high-level configuration parameters and cell-level parameters. To ensure that UE1, UE2, and UE3 use the same DMRS sequence, it is first necessary to determine that the cyclic shift domain in the DCI is the same, which can be passed through the group. Allocating the same DCI or limiting the implementation of the cyclic shift domain in the respective DCI; secondly, in order to ensure that the base sequences are the same, it is necessary to configure the same high-level parameters for UE1, UE2, and UE3, for example, parameters in the calculation of the sequence shift mode, UE-level Whether the group hopping function is enabled or not, UE1, UE2, and UE3 can be configured based on the high-level parameters of UE4.

It should be noted that UE1, UE2, and UE3 are allocated on the same time-frequency resource, and the same MCS is used for uplink information transmission, and the base station receives the same data from UE1, UE2, and UE3, and improves channel estimation by receiving signal power enhancement. Performance and decoding performance.

309. The UE1, the UE2, and the UE3 generate a redundancy version according to the uplink information.

The uplink information includes service data. After receiving the uplink information of the UE4, the UE1, the UE2, and the UE3 may generate a check bit, and the uplink information and the check bit are interleaved and inserted into a ring buffer, and then the bit to be transmitted is extracted from different starting positions of the ring buffer. The redundant version generated by the different extracted locations is different. The redundancy versions generated by UE1, UE2, and UE3 may be the same or different.

310. The UE1, the UE2, and the UE3 respectively send the generated redundancy version to the base station.

311. The base station performs cross-UE data combining on the redundancy versions sent by UE1, UE2, and UE3.

The uplink information sent by the UE1, the UE2, and the UE3 may be the same or different redundancy versions, and the base station performs the cross-UE data combining the received redundancy version. The base station performs decoding after combining the redundancy versions, and if the decoding fails, may instruct UE1, UE2, and UE3 to perform retransmission, The latter base station combines the redundancy version retransmitted by UE1, UE2, and UE3 with the redundancy version that failed to be decoded before decoding. The method of merging the redundancy versions by the base station may be: when the redundancy versions are the same, the same redundancy version is superimposed; when the redundancy versions are not the same, the different redundancy versions are arranged in the order of the versions.

It should be noted that UE1, UE2, and UE3 may not perform step 207, but directly forward the uplink information to the base station after step 206. Then, in step 208, the base station receives the uplink information sent by UE1, UE2, and UE3. Select the best signal quality for demodulation processing.

A further embodiment of the present invention provides a device 40 for data transmission. As shown in FIG. 6, the first terminal and the at least two second terminals belong to a multicast group established by the base station, and the at least two The second terminal is configured to forward the uplink information sent by the first terminal to the base station, where the device 40 is any one of the at least two second terminals, including:

The receiving unit 41 is configured to receive uplink information sent by the first terminal, where the uplink information is sent by the first terminal to the at least two second terminals;

The sending unit 42 is configured to send the uplink information to the base station.

In an implementation manner of the embodiment of the present invention, the receiving unit 41 is further configured to receive group information sent by the base station, where the group information is allocated by the base station to the multicast group.

In still another implementation manner of the embodiment of the present invention, the sending unit 42 is further configured to send, to the base station, a buffer status report BSR that carries the group information.

In still another embodiment of the embodiment of the present invention, as shown in FIG. 7, the device 40 may further include:

The adding unit 43 is configured to add a preset media access control MAC sub-header to the BSR, where the preset MAC sub-header is used to indicate that the BSR carries the group information.

The generating unit 44 is configured to generate a redundancy version according to the uplink information.

The sending unit 42 is further configured to send the generated redundancy version to the base station.

A further embodiment of the present invention provides a device 50 for data transmission. As shown in FIG. 8, the first terminal and the at least two second terminals belong to a multicast group established by the base station, and the at least two second terminals. For transmitting the uplink information sent by the first terminal to the base station, the device 50 is the base station, and includes:

The receiving unit 51 is configured to receive the uplink information sent by the at least two second terminals, where the uplink information is sent by the first terminal to the at least two second terminals;

The processing unit 52 is configured to process the uplink information.

In an embodiment of the embodiment of the present invention, as shown in FIG. 9, the device 50 may further include:

An allocating unit 53 is configured to allocate group information for the multicast group, where the group information is used to distinguish a multicast group established by the base station;

The sending unit 54 is configured to send the group information to the at least two second terminals.

In still another implementation manner of the embodiment of the present invention, the receiving unit 51 is further configured to receive a buffer status report BSR that is sent by the at least two second terminals and that carries the group information.

In still another embodiment of the embodiment of the present invention, as shown in FIG. 9, the device 50 may further include:

The determining unit 55 is configured to determine, according to the group information, that the uplink information is sent by the first terminal.

An obtaining unit 56, configured to acquire a media access control MAC subheader of the BSR;

In still another implementation manner of the embodiment of the present invention, the receiving unit 51 is further configured to receive a redundancy version sent by the at least two second terminals, where the redundancy version is the at least two second terminals respectively. According to the uplink information, the redundancy versions generated by the at least two second terminals are the same, or the redundancy versions generated by the at least two second terminals are different.

The processing unit 52 is further configured to merge the received redundancy versions.

In the embodiment of the present invention, the base station establishes a multicast group composed of the first terminal and the at least two second terminals. When the first terminal needs to transmit uplink information to the base station, the uplink information is simultaneously sent to the at least two second terminals; The at least two second terminals respectively forward the uplink information sent by the first terminal to the base station, and the base station respectively receives the uplink information sent by the at least two second terminals, and then processes the uplink information. As such, in the embodiment of the present invention, for the terminal at the edge of the network coverage, the uplink information may be transmitted to the base station through multiple second terminals at the same time, and even if the second terminal is faulty or disconnected from the second terminal, the uplink information is also The second terminal that is not connected to the terminal and is connected to the terminal can be forwarded to the base station side, so that the number of uplink information retransmissions is reduced, and the uplink information of the terminal cannot be sent to the base station, thereby causing service interruption of the terminal, which causes inconvenience to the user. .

A further embodiment of the present invention provides a terminal 60, where the first terminal and the at least two second terminals belong to a multicast group established by the base station, and the at least two second terminals are configured to forward the first terminal to the The uplink information sent by the base station, the terminal 60 is any one of the at least two second terminals. As shown in FIG. 10, the terminal 60 includes: at least one processing unit 601, such as a CPU, at least one communication unit 602. Or other input unit 603, storage unit 604, output unit 605, at least one communication bus 606, and power source 607. Communication bus 606 is used to implement communication between these components.

The processing unit 601 is a control center of the terminal 60, which connects various parts of the entire terminal 60 by various interfaces and lines, by running or executing software programs and/or modules stored in the storage unit, and calling the storage in the storage unit 604. Data to perform various functions of the terminal 60 and/or process data. The processing unit 601 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs that have the same function or different functions. For example, the processing unit 601 may include only a central processing unit (CPU), or may be a GPU, a digital signal processor (DSP), and a control chip (eg, a baseband chip) in the communication unit. The combination. In the embodiment of the present invention, the CPU may be a single operation core, and may also include multiple operation cores.

The communication unit 602 is configured to establish a communication channel through which the terminal 60 is connected to a remote server, and downloads media data from the remote server or uploads media data to the remote server. The communication unit 602 may include a wireless local area network (wireless LAN) module, a Bluetooth module, a baseband module, and the like, and a radio frequency (RF) circuit corresponding to the communication module. For wireless local area network communication, Bluetooth communication, infrared communication and/or cellular communication system communication, such as Wideband Code Division Multiple Access (W-CDMA) and/or High Speed Downlink Packet Access (High Speed) Downlink Packet Access, HSDPA). The communication module is used to control communication of components in the terminal 60 and can support Direct Memory Access.

In various embodiments of the present invention, various communication modules in the communication unit 602 generally appear in the form of an integrated circuit chip, and can be selectively combined without including all communication modules and corresponding Antenna group. For example, the communication unit 602 can include only a baseband chip, a radio frequency chip, and a corresponding antenna to provide communication functionality in a cellular communication system. The terminal 60 can be connected to a cellular network (Cellular Network) or the Internet (Internet) via a wireless communication connection established by the communication unit 602, such as wireless local area network access or WCDMA access. In some alternative embodiments of the invention, communication modules, such as baseband modules, in the communication unit 602 may be integrated into the processing unit 601.

The input unit 603 is configured to implement interaction between the user and the terminal 60 and/or information input into the terminal 60. For example, the input unit 603 can receive numeric or character information input by the user to generate a signal input related to user settings or function control. In the specific embodiment of the present invention, the input unit 603 may be a touch panel, or may be other human-computer interaction interfaces, such as a physical input key, a microphone, etc., and may be other external information capture devices, such as a camera. A touch panel, also known as a touch screen or touch screen, collects operational actions that the user touches or approaches on. For example, the user uses an action of any suitable object or accessory such as a finger or a stylus on or near the touch panel, and drives the corresponding connecting device according to a preset program. Optionally, the touch panel may include two parts: a touch detection device and a touch controller. Wherein the touch detection device detects a touch operation of the user, converts the detected touch operation into an electrical signal, and transmits the electrical signal to the touch controller; the touch controller receives the electrical signal from the touch detection device, and It is converted into contact coordinates and sent to the processing unit 601. The touch controller can also receive and execute commands from the processing unit 601. In addition, touch panels can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In other embodiments of the present invention, the physical input keys used by the input unit 603 may include, but are not limited to, a physical keyboard, a function key (such as a volume control button, a switch button, etc.), a trackball, a mouse, a joystick, and the like. Kind or more. The input unit 603 in the form of a microphone can collect the voice input by the user or the environment and convert it into an electrical signal form, and the processing unit 601 can execute the life. make.

The storage unit 604 is used to store software programs and modules, and the processing unit 601 executes various functional applications of the terminal 60 and implements data processing by running software programs and modules stored in the storage unit 604. The storage unit 604 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system 6041, an application program 6042 required for at least one function, such as a sound playing program, an image playing program, and the like; the data storage area can be stored. Data (such as audio data, phone book, etc.) created according to the use of the terminal 60, and the like. In a specific embodiment of the present invention, the storage unit 604 may include a volatile memory, such as a non-volatile volatile random access memory (NVRAM), a phase change random access memory (PRAM), Magnetoresistive random access memory (MRAM), etc., may also include non-volatile memory, such as at least one disk storage device, Electronically Erasable Programmable Read-Only Memory (EEPROM) ), flash memory devices, such as NOR flash memory or NAND flash memory. The nonvolatile memory stores an operating system 6041 and an application 6042 executed by the processing unit 601. The processing unit 601 loads the running program and data from the non-volatile memory into the memory and stores the digital content in a plurality of storage devices. The operating system 6041 includes various components and/or drivers for controlling and managing conventional system tasks, such as memory management, storage device control, power management, and the like, as well as facilitating communication between various hardware and software. In the embodiment of the present invention, the operating system may be an Android system, an iOS system, a Windows operating system, or the like, or may be an embedded operating system such as Vxworks.

The application 6042 includes any application installed on the terminal 60, including but not limited to browsers, emails, instant messaging services, word processing, keyboard virtualization, widgets, encryption, digital rights management, voice recognition. , voice copying, positioning (such as those provided by GPS), music playback, and more.

The output unit 606 includes, but is not limited to, an image output unit and a sound output unit. The image output unit is used to output text, pictures, and/or video. The image output unit may include a display surface The board is, for example, a display panel configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), a field emission display (FED), or the like. Alternatively, the image output unit may comprise a reflective display, such as an electrophoretic display, or a display utilizing an Interferometric Modulation of Light. The image output unit may comprise a single display or multiple displays of different sizes. In the embodiment of the present invention, the touch panel used by the input unit 603 can also serve as the display panel of the output unit 606. For example, when the touch panel detects a touch or proximity gesture operation thereon, it is transmitted to the processing unit 601 to determine the type of the touch event, and then the processing unit 601 provides a corresponding visual output on the display panel according to the type of the touch event. . The input unit 603 and the output unit 606 can implement the input and output functions of the terminal 60 as two separate components, but in some embodiments, the touch panel can be integrated with the display panel to implement input and output of the terminal 60. Features. For example, the image output unit can display various graphical user interfaces (GUIs) as virtual control components, including but not limited to windows, scroll axes, icons, and scrapbooks, for the user to touch. Take action.

The audio output unit includes a digital to analog converter for converting the audio signal output by the processing unit 601 from a digital format to an analog format.

Power source 607 is used to power different components of terminal 60 to maintain its operation. As a general understanding, the power source 607 can be a built-in battery, such as a conventional lithium ion battery, a nickel metal hydride battery, etc., and also includes an external power source that directly supplies power to the terminal 60, such as an AC adapter. In some embodiments of the present invention, the power source 607 can also be more widely defined, for example, can also include a power management system, a charging system, a power failure detecting circuit, a power converter or an inverter, and a power status indicator. (e.g., light emitting diodes), as well as any other components associated with power generation, management, and distribution of terminal 60.

Specifically, the communication unit 602 is configured to receive uplink information sent by the first terminal, where the uplink information is sent by the first terminal to the at least two second terminals; and The base station transmits the uplink information.

In an implementation manner of the embodiment of the present invention, the communication unit 602 is further configured to receive group information sent by the base station, where the group information is allocated by the base station to the multicast group, and the group information is used by the group information. And distinguishing the multicast group established by the base station.

In still another implementation manner of the embodiment of the present invention, the communication unit 602 is further configured to send, to the base station, a buffer status report BSR that carries the group information.

In another implementation manner of the embodiment of the present invention, the processing unit 601 is configured to add a preset media access control MAC sub-header to the BSR, where the preset MAC sub-header is used to indicate that the BSR carries the Group information.

In still another implementation manner of the embodiment of the present invention, the processing unit 601 is further configured to generate a redundancy version according to the uplink information.

The communication unit 602 is further configured to send the generated redundancy version to the base station, so that the base station merges the received redundancy version.

A further embodiment of the present invention provides a base station 70, the first terminal and the at least two second terminals belong to a multicast group established by the base station 70, and the at least two second terminals are used to forward the first terminal As shown in FIG. 11, the base station 70 includes a processing unit 701 and a communication unit 702, and also shows a storage unit 703 and a bus 704, the processing unit 701, the communication unit 702, and the storage. Units 703 are connected by bus 704 and complete communication with each other.

It should be noted that the processing unit 701 herein may be a processing component or may be A collective term for multiple processing elements. For example, the processing component may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. For example, one or more digital singal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The storage unit 703 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And the memory 83 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.

The bus 704 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus 84 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

The base station 70 may also include input and output devices coupled to the bus 704 for connection to other portions, such as the processing unit 701, via the bus 704.

The processing unit 701 calls the program code in the storage unit 703 for performing the operations performed by the base station in the above method embodiment.

Specifically, the communication unit 702 is configured to receive the uplink information that is sent by the at least two second terminals, where the uplink information is sent by the first terminal to the at least two second terminals at the same time;

The processing unit 701 is configured to process the uplink information.

In an implementation manner of the embodiment of the present invention, the processing unit 701 is further configured to allocate group information for the multicast group, where the group information is used to distinguish a multicast group established by the base station;

The communication unit 702 is further configured to send the group information to the at least two second terminals.

In still another embodiment of the embodiment of the present invention, the communication unit 702 is further configured to receive the Determining, by the at least two second terminals, a buffer status report BSR carrying the group information;

The processing unit 701 is further configured to determine, according to the group information, that the uplink information is sent by the first terminal.

In another implementation manner of the embodiment of the present invention, the processing unit 701 is further configured to acquire a media access control MAC sub-header of the BSR, and configured to determine, according to the MAC sub-head, whether the BSR is carried in the BSR. Group information.

In still another implementation manner of the embodiment of the present invention, the communication unit 702 is further configured to receive a redundancy version sent by the at least two second terminals, where the redundancy version is the at least two second terminals respectively. According to the uplink information, the redundancy versions generated by the at least two second terminals are the same, or the redundancy versions generated by the at least two second terminals are different.

The processing unit 701 is further configured to merge the received redundancy versions.

The device for data transmission provided by the embodiment of the present invention may implement the foregoing method embodiment. For the specific function implementation, refer to the description in the method embodiment, and details are not described herein again. The method and apparatus for data transmission provided by the embodiments of the present invention may be applicable to data transmission between a base station and a terminal, but are not limited thereto.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, may include the methods as described above The flow of an embodiment. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A method for data transmission, comprising:

The second terminal receives the uplink information sent by the first terminal, where the uplink information is sent by the first terminal to the second terminal, and the first terminal and the at least two second terminals belong to one established by the base station. a multicast group, at least two of the second terminals are configured to forward uplink information sent by the first terminal to the base station;

The second terminal sends the uplink information to the base station.
The method according to claim 1, wherein before the receiving, by the second terminal, the information sent by the first terminal, the method further comprises:

The second terminal receives the group information sent by the base station, where the group information is allocated by the base station to the multicast group, and the group information is used to distinguish the multicast group established by the base station.
The method according to claim 2, wherein before the sending, by the second terminal, the uplink information to the base station, the method further includes:

The second terminal sends a buffer status report BSR carrying the group information to the base station.
The method according to claim 1, wherein before the second terminal sends the BSR carrying the group information to the base station, the method further includes:

The second terminal adds a preset media access control MAC sub-header to the BSR, where the preset MAC sub-header is used to indicate that the BSR carries the group information.
The method according to claim 1, wherein before the sending, by the second terminal, the uplink information to the base station, the method further includes:

The second terminal generates a redundancy version according to the uplink information, respectively.

The sending, by the second terminal, the uplink information to the base station includes:

The second terminal sends a respective generated redundancy version to the base station.
A method for data transmission, comprising:

The base station receives the uplink information that is sent by the at least two second terminals, where the uplink information is sent by the first terminal to the at least two second terminals, the first terminal and the at least two The two terminals belong to a multicast group established by the base station, and the at least two second terminals And being used to forward uplink information sent by the first terminal to the base station;

The base station processes the uplink information.
The method according to claim 6, wherein before the receiving, by the base station, the uplink information sent by the at least two second terminals, the method further includes:

The base station allocates group information for the multicast group, and the group information is used to distinguish a multicast group established by the base station;

The base station sends the group information to the at least two second terminals.
The method according to claim 7, wherein before the receiving, by the base station, the uplink information sent by the at least two second terminals, the method further includes:

Receiving, by the base station, a buffer status report BSR that carries the group information sent by the at least two second terminals;

The base station determines, according to the group information, that the uplink information is sent by the first terminal.
The method according to claim 8, wherein before the determining, by the base station, that the uplink information is sent by the first terminal according to the group information, the method further includes:

Obtaining, by the base station, a media access control MAC subheader of the BSR;

The base station determines, according to the MAC sub-header, whether the BSR carries the group information.
The method according to claim 6, wherein the receiving, by the base station, the uplink information sent by the at least two second terminals comprises:

Receiving, by the base station, a redundancy version sent by the at least two second terminals, where the redundancy version is generated by the at least two second terminals according to the uplink information, where the at least two second terminals respectively The generated redundancy versions are the same, or the redundancy versions generated by the at least two second terminals are different;

The processing, by the base station, the uplink information includes:

The base station merges the received redundancy versions.
An apparatus for data transmission, wherein the first terminal and at least two second terminals belong to a multicast group established by the base station, and the at least two second terminals are used to forward the first terminal The uplink information sent to the base station, the device is the at least two second Any of the terminals, including:

a receiving unit, configured to receive uplink information sent by the first terminal, where the uplink information is sent by the first terminal to the at least two second terminals;

And a sending unit, configured to send the uplink information to the base station.
The apparatus according to claim 11, wherein the receiving unit is further configured to receive group information sent by the base station, where the group information is allocated by the base station to the multicast group, the group information It is used to distinguish the multicast group established by the base station.
The apparatus according to claim 12, wherein the sending unit is further configured to send, to the base station, a buffer status report BSR that carries the group information.
The device according to claim 13, wherein the device further comprises:

And an adding unit, configured to add a preset media access control MAC sub-header to the BSR, where the preset MAC sub-header is used to indicate that the group information is carried in the BSR.
The device according to claim 11, wherein the device further comprises:

a generating unit, configured to generate a redundancy version according to the uplink information;

The sending unit is further configured to send the generated redundancy version to the base station.
An apparatus for data transmission, wherein the first terminal and at least two second terminals belong to a multicast group established by the base station, and the at least two second terminals are used to forward the first terminal The uplink information sent to the base station, where the device is the base station, includes:

a receiving unit, configured to receive the uplink information sent by the at least two second terminals, where the uplink information is sent by the first terminal to the at least two second terminals;

a processing unit, configured to process the uplink information.
The device according to claim 16, wherein the device further comprises:

An allocating unit, configured to allocate group information for the multicast group, where the group information is used to distinguish a multicast group established by the base station;

And a sending unit, configured to send the group information to the at least two second terminals.
The apparatus according to claim 17, wherein the receiving unit is further configured to receive a buffer status report BSR that is sent by the at least two second terminals and that carries the group information; The device also includes:

And a determining unit, configured to determine, according to the group information, that the uplink information is sent by the first terminal.
The device of claim 18, wherein the device further comprises:

An acquiring unit, configured to acquire a media access control MAC subheader of the BSR;

The determining unit is further configured to determine, according to the MAC sub-header, whether the group information is carried in the BSR.
The apparatus according to claim 16, wherein the receiving unit is further configured to receive a redundancy version sent by the at least two second terminals, where the redundancy version is respectively determined by the at least two second terminals According to the uplink information, the redundancy versions generated by the at least two second terminals are the same, or the redundancy versions generated by the at least two second terminals are different.

The processing unit is further configured to merge the received redundancy versions.