WO2015176260A1

WO2015176260A1 - Uplink data transmission method, device and system

Info

Publication number: WO2015176260A1
Application number: PCT/CN2014/078037
Authority: WO
Inventors: 李明超; 熊新; 曹振臻
Original assignee: 华为技术有限公司
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2015-11-26
Also published as: CN105409152A; CN105409152B

Abstract

Embodiments of the present invention relate to the technical field of wireless communications. Provided are an uplink data transmission method, device and system. The method comprises: after a joint transmission link is established, receiving uplink data sent by a first device; and when the uplink data is not successfully received, receiving uplink data sent by a second device according to a retransmission request through the joint transmission link. In the present invention, a joint transmission link is established with a second device, and when uplink data sent by a first device is not successfully received, the uplink data sent by the first device and then sent by the second device is received, the uplink data sent by the second device being the uplink data sent by the first device and received by the second device, so that the first device is prevented from retransmitting the same uplink data, the probability that the first device retransmits the same uplink data is reduced, and the accuracy of sending uplink data to a macro base station by the first device is improved.

Description

Method, device and system for transmitting uplink data

The present invention relates to the field of wireless communication technologies, and in particular, to a method, device, and system for transmitting uplink data. Background technique

With the massive growth of smartphones, various applications based on high-rate data services bring users a rich user experience. In order to meet the user's demand for the high-speed data service, the LTE (Long Term Evolved) network realizes data transmission by communicating between the first device and the macro base station of the UE (User Equipment) module, thereby improving user data. rate. For example, the UE implements data transmission with an eNB (Evolved Node B, evolved base station). For another example, RN (Relay Node) and eNB implement data transmission. Among the many indicators that affect the communication rate between the first device and the macro base station, the uplink data transmission rate at which the first device transmits data to the macro base station is one of the key indicators. Therefore, how the first device and the macro base station perform uplink data transmission in the LTE network, and increasing the accuracy of data transmission is the key to satisfy the high-speed data service requirement.

In the edge area of the cell, the quality of the macro base station received by the first device is degraded, the accuracy of the first device transmitting the uplink data to the macro base station is reduced, and the probability of retransmission of the first device of the same uplink data is increased, thereby failing to Meet the needs of high-speed data services. Summary of the invention

In order to solve the problem that the received macro data of the macro base station is degraded, the accuracy of transmitting the uplink data to the macro base station is reduced, the probability of retransmission of the same uplink data is increased, and the demand for the high rate data service cannot be met. The present invention provides a method, device, and system for transmitting uplink data. The technical solution is as follows: A first aspect provides a method for transmitting uplink data, where the method includes: determining a first device that needs to perform uplink data transmission through a joint transmission link, and transmitting, to the second device, a joint that includes the first device identifier Transmission establishment request;

Receiving, by the second device, a joint transmission setup confirmation message returned after the joint transmission link of the first device is established according to the joint transmission establishment request, and sending an uplink authorization of the first device to the first device ;

And receiving, by the first device, uplink data that is sent according to the uplink authorization, and when the uplink data is not successfully received, sending, by using the joint transmission link, the weight of the first device identifier to the second device Pass the request;

Receiving, by the second device, the uplink data sent by the joint transmission link according to the retransmission request, where the uplink data sent by the second device is after the second device obtains the uplink authorization of the first device, And the uplink data that is sent by the first device according to the uplink authorization according to the uplink authorization.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the first device, the first device that needs to perform the uplink data transmission by using the joint transmission link, includes:

Receiving a current channel quality indicator sent by the first device;

And if the current channel quality indicator is lower than the first threshold, determining that the first device is a first device that needs to perform uplink data transmission through the joint transmission link.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the receiving, by the second device, the association returned after establishing a joint transmission link with the first device according to the joint transmission establishment request After transmitting the setup confirmation message, it also includes:

Determining whether the joint transmission link needs to be released;

And if the joint transmission link needs to be released, sending a joint transmission release message including the first device identifier to the second device, so that the second device releases the first message according to the joint transmission release message. The joint transmission link of the device.

In conjunction with the second possible implementation of the first aspect, a third possible implementation in the first aspect In the manner, the determining whether the joint transmission link needs to be released includes:

Receiving a current channel quality indicator sent by the first device;

If the current channel quality indicator is above a second threshold, it is determined that the joint transmission link needs to be released.

In conjunction with the second possible implementation of the first aspect, in a fourth possible implementation manner of the foregoing aspect, the determining whether the joint transmission link needs to be released includes:

When the uplink data transmission of the first device is completed, it is determined that the joint transmission link needs to be released.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the sending, by the second device, the joint transmission establishment request that includes the first device identifier includes:

Transmitting, by the radio resource control signaling, a joint transmission setup request including the first device identifier to the second device;

Or sending, by the scheduling signaling of the medium access control layer, a joint transmission establishment request including the first device identifier to the second device.

With reference to the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible aspect of the first aspect The implementation manner is the fifth possible implementation manner of the first aspect. In a sixth possible implementation manner of the first aspect, the joint transmission setup request further includes a first RNTI of the first device (Radio

Network Temporary Identity, wireless network temporary identifier);

The sending the uplink authorization of the first device to the first device includes:

Sending an uplink grant scrambled by the first RNTI to the first device.

With the sixth possible implementation of the first aspect, in a seventh possible implementation manner of the first aspect, the joint transmission setup request further includes a second RNTI corresponding to the first RNTI;

And the sending, by the joint transmission link, the retransmission request including the first device identifier to the second device, including:

Using the second RNTI as the first device identifier, and using the joint transmission link The second device sends a retransmission request scrambled by the second RNTI.

With the sixth possible implementation of the first aspect, in an eighth possible implementation manner of the first aspect, the sending, by the joint transmission link, the second device includes the first device identifier Retransmission request, including:

Determining a third RNTI of the second device, and transmitting, by the joint transmission link, a retransmission request including the first device identifier scrambled by the third RNTI to the second device.

With reference to the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible aspect of the first aspect The implementation manner, the fifth possible implementation manner of the first aspect, the sixth possible implementation manner of the first aspect, the seventh possible implementation manner of the first aspect, and the eighth possible implementation manner of the first aspect In a ninth possible implementation manner of the foregoing aspect, the uplink right includes a time-frequency resource;

Transmitting, by the joint transmission link, a retransmission request including the first device identifier and a modulation and coding scheme to the second device;

And the receiving, by the second device, the uplink data sent by using the joint transmission link according to the retransmission request, including:

And receiving, by the second device, uplink data after the first device by using a modulation and coding scheme in the retransmission request.

With reference to the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible aspect of the first aspect The implementation manner, the fifth possible implementation manner of the first aspect, the sixth possible implementation manner of the first aspect, the seventh possible implementation manner of the first aspect, and the eighth possible implementation manner of the first aspect The ninth possible implementation manner of the first aspect, in the tenth possible implementation manner of the first aspect, the joint transmission establishment request further includes an uplink authorization used when the uplink data is jointly transmitted for the first time. In a second aspect, a macro base station is provided, where the macro base station includes:

a determining module, configured to determine a first device that needs to perform uplink data transmission through a joint transmission link;

a sending module, configured to send, to the second device, a joint transmission establishment request that includes the first device identifier determined by the determining module;

a receiving module, configured to receive a joint transmission setup acknowledgement message returned by the joint transmission link of the first device, where the joint transmission link of the first device is established by the second device according to the joint transmission sent by the sending module Request to establish

The sending module is further configured to send an uplink grant of the first device to the first device, where the receiving module is further configured to receive an uplink sent by the first device according to an uplink grant sent by the sending module. Data

The sending module is further configured to: when the second receiving module does not successfully receive the uplink data, send, by using the joint transmission link, a retransmission request including the first device identifier to the second device;

The receiving module is further configured to receive uplink data that is sent by the second device according to the retransmission request sent by the sending module, and the uplink data sent by the second device is the second After the device obtains the uplink authorization of the first device, the uplink data that is sent by the first device according to the uplink authorization is received according to the uplink authorization.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining module includes:

a receiving unit, configured to receive a current channel quality indicator sent by the first device;

And a determining unit, configured to determine, when the current channel quality indicator received by the receiving unit is lower than the first threshold, the first device is a first device that needs to perform uplink data transmission through the joint transmission link.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the determining module is further configured to determine whether the joint transmission link needs to be released; The sending module is further configured to: when the determining module determines that the joint transmission link needs to be released, send a joint transmission release message including the first device identifier to the second device, so that the second device A joint transmission link with respect to the first device is released according to the joint transmission release message.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the receiving unit is further configured to receive a current channel quality indicator sent by the first device, The determining unit is further configured to determine that the joint transmission link needs to be released when the current channel quality indicator received by the receiving unit is higher than a second threshold.

With the second possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the determining module is further configured to determine, when the uplink data transmission of the first device is completed, The joint transmission link is released.

With reference to the second aspect, in a fifth possible implementation manner of the second aspect, the sending module is further configured to send, by using radio resource control signaling, a joint transmission setup request including the first device identifier to the second device Or transmitting, by the scheduling signaling of the medium access control layer, a joint transmission establishment request including the first device identifier to the second device.

With reference to the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, and the fourth possible aspect of the second aspect The implementation manner is the fifth possible implementation manner of the second aspect. In a sixth possible implementation manner of the second aspect, the joint transmission establishment request sent by the sending module further includes the first RNTI;

The sending module is further configured to send, to the first device, an uplink authorization that is scrambled by the first RNTI.

With the sixth possible implementation of the second aspect, in a seventh possible implementation manner of the second aspect, the joint transmission setup request sent by the sending module further includes a second RNTI corresponding to the first RNTI ;

The sending module is further configured to use the second RNTI as the first device identifier, and send, by using the joint transmission link, a retransmission request that is scrambled by the second RNTI to the second device. With reference to the sixth possible implementation of the second aspect, in the eighth possible implementation of the second aspect, the sending module is further configured to determine a third RNTI of the second device, The joint transmission link transmits to the second device a retransmission request including the first device identifier scrambled by the third RNTI.

With reference to the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, and the fourth possible aspect of the second aspect The implementation manner, the fifth possible implementation manner of the second aspect, the sixth possible implementation manner of the second aspect, the seventh possible implementation manner of the second aspect, and the eighth possible implementation manner of the second aspect In a ninth possible implementation manner of the second aspect, the uplink authorization sent by the sending module includes a time-frequency resource;

The sending module is further configured to send, by using the joint transmission link, a retransmission request including the first device identifier and a modulation and coding scheme to the second device;

The receiving module is further configured to: after receiving, by the second device, the uplink data of the first device by using a modulation and coding scheme in the retransmission request, using the time-frequency resource to pass the joint transmission chain. The processed uplink data sent by the road.

With reference to the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, and the fourth possible aspect of the second aspect The implementation manner, the fifth possible implementation manner of the second aspect, the sixth possible implementation manner of the second aspect, the seventh possible implementation manner of the second aspect, and the eighth possible implementation manner of the second aspect The ninth possible implementation manner of the second aspect, in the tenth possible implementation manner of the second aspect, the joint transmission establishment request sent by the sending module further includes an uplink used when the uplink data is jointly transmitted for the first time. Authorization.

A third aspect provides a method for transmitting uplink data, where the method includes:

Receiving, by the macro base station, a joint transmission establishment request including the first device identifier;

Establishing a joint transmission link with the macro base station with respect to the first device according to the joint transmission establishment request, and returning a joint transmission establishment acknowledgement message; Acquiring an uplink grant sent by the macro base station to the first device, and acquiring uplink data sent by the first device to the macro base station according to the uplink grant;

And receiving, by the joint transmission link, a retransmission request that includes the first device identifier sent by the macro base station, sending, by using the retransmission request, the macro base station to the macro base station according to the retransmission request. Upstream data of the first device.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the receiving, by the receiving macro base station, the joint transmission establishment request that includes the first device identifier includes:

Receiving, by the macro base station, the joint transmission establishment request including the first device identifier sent by the radio resource control signaling;

Alternatively, the receiving macro base station sends a joint transmission establishment request including the first device identifier sent by the scheduling signaling of the medium access control layer.

With reference to the third aspect, in a second possible implementation manner of the third aspect, after the performing the joint transmission establishment request and the macro base station to establish a joint transmission link with the first device, the method further includes:

Receiving, by the macro base station, a joint transmission release message including the first device identifier, and releasing a joint transmission link about the first device according to the joint transmission release message.

With reference to the third aspect, the first possible implementation manner of the third aspect, and the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the joint transmission establishment request Also including a first RNTI of the first device;

And obtaining the uplink authorization sent by the macro base station to the first device, where

Obtaining an uplink grant sent by the macro base station to the first device according to the first RNTI. With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the joint transmission establishment request further includes an uplink authorization used when the uplink data is jointly transmitted for the first time;

If the uplink authorization sent by the macro base station to the first device is obtained for the first time, The uplink authorization used in the first joint transmission of the uplink data is obtained in the transmission establishment request, and the uplink authorization used for the first joint transmission of the uplink data is used as the uplink authorization sent by the macro base station to the first device.

With reference to the third aspect, in a fifth possible implementation manner of the third aspect, the obtained uplink right includes a time-frequency resource, and the received retransmission request includes the first device identifier and a modulation and coding scheme;

And sending the uplink data of the first device to the macro base station by using the joint transmission link according to the retransmission request, including:

And performing, by using the modulation and coding scheme in the retransmission request, the uplink data of the first device, where the fourth device is provided, where the second device includes:

a receiving module, configured to receive a joint transmission setup request that includes a first device identifier sent by the macro base station;

And a establishing module, configured to establish, according to the joint transmission establishment request received by the receiving module, a joint transmission link with the macro base station with respect to the first device;

a return module, configured to return a joint transmission setup confirmation message;

An obtaining module, configured to acquire an uplink grant sent by the macro base station to the first device, where the acquiring module is further configured to acquire, according to the obtained uplink grant, uplink data that is sent by the first device to the macro base station ;

The receiving module is further configured to receive, by using a joint transmission link established by the establishing module, a retransmission request that is sent by the macro base station and includes the first device identifier;

a sending module, configured to: when the receiving module receives a retransmission request that includes the first device identifier sent by the macro base station by using a joint transmission link established by the establishing module, according to the retransmission request The joint transmission link established by the establishing module sends the uplink data of the first device to the macro base station.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving module, The method further includes: receiving, by the macro base station, the joint transmission establishment request that is sent by the radio resource control signaling, including the first device identifier; or receiving the joint transmission that is sent by the macro base station by using the scheduling signaling of the medium access control layer, including the first device identifier. Create a request.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the receiving module is further configured to receive, by the macro base station, a joint transmission release message that includes the first device identifier, where The second device also includes:

And a release module, configured to release a joint transmission link with respect to the first device according to the joint transmission release message received by the receiving module.

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, and the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the receiving module receives The joint transmission establishment request further includes a first RNTI of the first device;

The acquiring module is further configured to acquire, according to the first RNTI, an uplink grant sent by the macro base station to the first device.

With the third possible implementation of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the joint transmission establishment request received by the receiving module further includes the first joint transmission of the uplink data. Upstream authorization;

The obtaining module is further configured to: when the uplink authorization sent by the macro base station to the first device is first acquired, obtain an uplink authorization used when the uplink data is jointly transmitted from the joint transmission establishment request, and The uplink grant used when the uplink data is jointly transmitted for the first time is used as the uplink grant sent by the macro base station to the first device.

With reference to the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the uplink authorization obtained by the acquiring module includes a time-frequency resource, and the retransmission request received by the receiving module includes the first Equipment identification and modulation and coding scheme;

The sending module is further configured to use the modulation and coding scheme in the retransmission request to pair the first set uplink data. A fifth aspect provides a transmission system for uplink data, where the system includes: a macro base station, a second device, and a first device;

The macro base station is the macro base station according to the second aspect, the second device is the second device according to the fourth aspect, and the first device is configured to use the uplink authorization sent by the macro base station. Sending uplink data to the macro base station.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

After determining the first device that needs to perform uplink data transmission through the joint transmission link, and establishing a joint transmission link with the second device with the second device, when the uplink data sent by the first device is not successfully received, receiving the second device The uplink data sent by the device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, thereby preventing the first device from retransmitting the same uplink data, and reducing the first device retransmitting the same uplink. The probability of data, which in turn meets the needs of high-rate data services. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a schematic diagram of an implementation environment of an uplink data transmission method provided by the present invention;

2 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention; FIG. 3 is a flowchart of a method for transmitting uplink data according to another embodiment of the present invention; FIG. 4 is another embodiment of the present invention; A flow chart of a method for transmitting uplink data is provided. FIG. 5 is a flowchart of a method for transmitting uplink data according to another embodiment of the present invention. FIG. 6 is a schematic diagram of releasing a joint transmission chain according to another embodiment of the present invention. A method flowchart of a road; FIG. 3 is a schematic structural diagram of a macro base station according to another embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a determining module according to another embodiment of the present invention; FIG. FIG. 9 is a schematic structural diagram of a second device according to another embodiment of the present invention; FIG. 10 is a schematic structural diagram of another second device according to another embodiment of the present invention; FIG. 11 is another embodiment of the present invention; A schematic diagram of the structure of a transmission system for providing uplink data

detailed description

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

The embodiment of the present invention provides a method for transmitting uplink data. Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an implementation environment involved in a method for transmitting uplink data according to an embodiment of the present invention. The implementation environment includes a macro base station 101, a second device 102, and a first device 103.

The macro base station 101 is a macro base station provided by the embodiment shown in FIG. 7 or FIG. 8 below, and the macro base station 101 is configured to establish a joint transmission link with the second device 102.

The second device 102 is a second device provided by the embodiment shown in Fig. 9 or Fig. 10 described below. In addition, the second device 102 may be a low power node involved in Typel relay (Type 1 relay), Type 2 relay, pico (pico cell) or small cell (small cell).

The first device 103 is a device having a UE module, such as a UE or an RN.

When the first device 103 has uplink data to transmit, the first device 103 transmits a buffer status request to the macro base station 101. After receiving the buffer status request sent by the first device 103, the macro base station 101 sends a UL grant (Uplink grant) to the first device 103 at the time of the Nth, where the UL grant indicates that the first device 103 can transmit uplink. Information such as resources used and modulation and coding schemes. After receiving the UL grant, the first device 103 sends uplink data to the macro base station 101 according to the resource, the modulation and coding scheme, and the like indicated by the UL grant at the time of the N+4. Both the second device 102 and the macro base station 101 receive the uplink data transmitted by the first device 103 to the macro base station 101 at the time of the N+4th. If the macro base station 101 receives the data and decodes successfully, it will feed back an ACK (acknowledgement) to the first device 103 at the time of the N+8, indicating that the reception is successful; if the macro base station 101 receives the incorrect, it will be at the N+8th time. Second device 102 After transmitting the retransmission request, the second device 102 transmits the uplink data transmitted by the first device 103 to the macro base station 101 after receiving the retransmission request. According to the above implementation environment, an embodiment of the present invention provides a method for transmitting uplink data. Referring to FIG. 2, the process of the method provided in this embodiment is specifically as follows:

201: Determine a first device that needs to perform uplink data transmission through the joint transmission link, and send a joint transmission establishment request including the first device identifier to the second device.

Optionally, determining, by the first device that needs to perform uplink data transmission by using the joint transmission link, includes: receiving a current channel quality indicator sent by the first device;

If the current channel quality indicator is below the first threshold, the first device is determined to be the first device that needs to perform uplink data transmission over the joint transmission link.

Optionally, the sending, by the second device, the joint transmission establishment request including the first device identifier, includes: sending, by using the radio resource control signaling, the joint transmission establishment request including the first device identifier to the second device;

Optionally, the joint transmission setup request further includes an uplink authorization used when the uplink data is jointly transmitted for the first time.

202: The receiving second device establishes a joint transmission establishment acknowledgement message returned after the joint transmission link of the first device according to the joint transmission establishment request, and sends the uplink authorization of the first device to the first device.

Optionally, after receiving the joint transmission setup confirmation message returned by the second device after the joint transmission establishment request is established, the method further includes:

Determine if a joint transmission link needs to be released;

If the joint transmission link needs to be released, sending a joint transmission release message including the first device identifier to the second device, so that the second device releases the joint transmission about the first device according to the joint transmission release message. Link.

Optionally, determining whether the joint transmission link needs to be released includes:

Receiving a current channel quality indicator sent by the first device;

If the current channel quality indication is above the second threshold, it is determined that the joint transmission link needs to be released. Optionally, determining whether the joint transmission link needs to be released includes:

Optionally, the joint transmission establishment request further includes a first RNTI (Radio Network Temporary Identity) of the first device;

Sending the uplink authorization of the first device to the first device, including:

An uplink grant scrambled by the first RNTI is sent to the first device.

203: Receive uplink data sent by the first device according to the uplink grant, and send the retransmission request including the first device identifier to the second device by using the joint transmission link when the uplink data is not successfully received.

Optionally, the joint transmission setup request further includes a second RNTI corresponding to the first RNTI;

Sending, by the joint transmission link, a retransmission request including the first device identifier to the second device, including: using the second RNTI as the first device identifier, and transmitting, by using the joint transmission link, the second RNTI to the second device Retransmit the request.

Optionally, the retransmission request including the first device identifier is sent to the second device by using the joint transmission link, including:

204: Receive, by the second device, the uplink data that is sent by using the joint transmission link according to the retransmission request, where the uplink data sent by the second device is the first device that is received by the second device according to the uplink authorization after the second device acquires the uplink authorization of the first device. Uplink data sent according to the uplink grant.

Optionally, the uplink grant includes a time-frequency resource;

Sending, by the joint transmission link, a retransmission request including the first device identifier to the second device, including: sending, by using the joint transmission link, the first device identifier and the modulation and coding scheme to the second device Re-transmission

And receiving, by the second device, the uplink data sent by the joint transmission link according to the retransmission request, the method includes: after receiving, by the second device, the uplink data of the first device by using a modulation and coding scheme in the retransmission request, another embodiment of the present invention A method for transmitting uplink data is provided. Referring to FIG. 3, the process of the method provided in this embodiment is specifically as follows:

301: Receive a joint transmission establishment request that is sent by the macro base station and includes the first device identifier.

Optionally, the receiving, by the macro base station, the joint transmission establishment request that includes the first device identifier, includes: receiving, by the macro base station, the joint transmission establishment request that includes the first device identifier by using the radio resource control signaling;

302: Establish a joint transmission link with the macro base station with respect to the first device according to the joint transmission establishment request, and return a joint transmission establishment acknowledgement message.

303. Acquire an uplink grant sent by the macro base station to the first device, and obtain uplink data sent by the first device to the macro base station according to the uplink grant.

Optionally, the joint transmission establishment request further includes a first RNTI of the first device;

Obtaining an uplink authorization sent by the macro base station to the first device, including:

Obtaining an uplink grant sent by the macro base station to the first device according to the first RNTI.

Optionally, the joint transmission setup request further includes an uplink authorization used when the uplink data is jointly transmitted for the first time;

If the uplink grant sent by the macro base station to the first device is obtained for the first time, the uplink grant used for the first joint transmission of the uplink data is obtained from the joint transmission setup request, and the uplink grant used when the uplink data is jointly transmitted for the first time is used as the macro base station. The upstream authorization sent to the first device. 304: If the retransmission request that is sent by the macro base station and includes the first device identifier is received by using the joint transmission link, send the uplink data of the first device to the macro base station by using the joint transmission link according to the retransmission request.

Optionally, the obtained uplink grant includes a time-frequency resource, and the received retransmission request includes a first device identifier and a modulation and coding scheme;

Sending, by the joint transmission link, the uplink data of the first device to the macro base station according to the retransmission request, including:

The uplink data of the first device is processed by using a modulation and coding scheme in the retransmission request, and optionally, after the joint transmission link with the macro base station is established according to the joint transmission establishment request, the method further includes:

And receiving, by the macro base station, a joint transmission release message including the first device identifier, and releasing the joint transmission link about the first device according to the joint transmission release message.

The method provided by the embodiment of the present invention, after determining the first device that needs to perform uplink data transmission through the joint transmission link, and establishing the joint transmission link with the second device with the second device, when the first device is not successfully received, Receiving the uplink data sent by the second device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, thereby preventing the first device from retransmitting the same uplink data, and reducing The probability that the first device retransmits the same uplink data, thereby meeting the demand for high-rate data services. Another embodiment of the present invention provides a method for transmitting uplink data, which is combined with the foregoing implementation environment and the content of the embodiment. For convenience of description, in this embodiment, the macro base station is an eNB, and the second device is a Type 2 relay, and the first device is The UE, the UE is identified as the first RNTI of the UE, and the joint transmission setup request includes the first RNTI of the UE and the second RNTI corresponding to the first RNTI as an example. The transmission method of the uplink data provided in this embodiment will be described. Referring to FIG. 4, the method process provided by this embodiment includes:

401: The eNB determines a UE that needs to perform uplink data transmission through a joint transmission link.

This embodiment does not determine, for the eNB, the UE that needs to perform uplink data transmission through the joint transmission link. The method is limited. Including but not limited to: the eNB receives the current CQI (Channel Quality Indicator) sent by each UE; if the current CQI of a certain UE is lower than the first threshold, the eNB determines that the UE needs to be performed through the joint transmission link. UE for uplink data transmission.

For example, the eNB receives the current CQI sent by each of the three UEs, where the current CQI1 sent by UE1 is 0.5, the current CQI2 sent by UE2 is 0.7, and the current CQI3 sent by UE3 is 2. If the first threshold is 1, since CQI1 is lower than the first threshold, CQI2 is lower than the first threshold, and CQI3 is higher than the first threshold, the eNB determines that UE1 and UE2 need to perform uplink data transmission through the joint transmission link. UE.

Certainly, the number of UEs that are sent by the eNB to send the respective current CQIs may be other numbers. In this embodiment, the specific number of UEs that send the respective current CQIs received by the eNB is not limited, and the current CQI value sent by the UE may also be Other values, this embodiment does not limit the specific value of the current CQI sent by the UE. The first threshold may also be other values. This embodiment does not limit the specific value of the first threshold.

In addition, in order to facilitate the description of the method provided in this embodiment, the eNB determines that two UEs need to perform uplink data transmission through the joint transmission link, that is, UE1 and UE2 are taken as an example.

402: The eNB sends a joint transmission setup request including the UE identifier to the Type2 relay.

The UE identifier is the first RNTI of the UE, and the joint transmission setup request includes the first RNTI of the UE and the second RNTI corresponding to the first RNTI. The first RNTI is an RNTI that the UE is using, and the RNTI may be a C-RNTI (Cell-RNTI, Cellular Radio Network Temporary Identity), a TC-RNTI (Temporary C-RNTI, Temporary Cell Radio Network Temporary Identity), and an SPS C-RNTK Semi-Persistent Scheduling C-RNTI, one or more of the semi-persistent scheduling cell wireless network temporary identifiers. If the number of the first RNTI is multiple, the number of the second RNTI is also the same, and the number of the second RNTI is the same as the number of the first RNTI, and each second RNTI uniquely corresponds to one RNTI.

It should be noted that, in order to describe the method provided in this embodiment and the subsequent embodiments, the first RNTI is taken as the C-RNTI. This embodiment does not limit the specific method for the eNB to send the joint transmission establishment request including the UE identifier to the Type2 relay. The eNB sends a joint transmission setup request including the UE identifier to the Type 2 relay through RRC (Radio Resource Control) signaling; or the eNB performs scheduling by using a MAC (Media Access Control) layer. The signaling sends a joint transmission setup request including the UE identity to the Type 2 relay.

For example, the UE1 is identified as ID1 and the UE2 is identified as ID2. The eNB sends a joint transmission setup request including ID1 and ID2 to the Type2 relay through RRC signaling. Alternatively, the eNB sends the ID1 and ID2 to the Type2 relay through the scheduling signaling of the MAC. Joint transmission setup request.

In addition, the specific form of the joint transmission setup request including the first RNTI and the second RNTI varies according to the manner in which the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay, and the joint transmission establishment request does not include the first RNTI in this embodiment. And the specific form of the second RNTI is defined.

If the eNB sends the joint transmission setup request including the UE identifier to the Type 2 relay, the eNB sends the joint transmission setup request including the UE identifier to the Type 2 relay by using the RRC signaling, and the joint transmission setup request includes the first RNTI and the second RNTI. The specific form may be: the joint transmission setup request includes the first RNTI and the second RNTI in a corresponding list form shown in Table 1.

Table 1

The C-RNTI1 is the first RNTI of the UE1, and the C-RNTI2 is the first RNTL of the UE2. The specific name of the C-RNTI may be another name. This embodiment does not limit the specific name of the C-RNTI.

If the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay, the eNB sends a joint transmission setup request including the UE identifier to the Type2 relay through the scheduling signaling of the MAC, and the MAC scheduling signaling used to indicate the joint transmission request includes In MAC PDU ( Protocol Data In the Unit, the protocol data unit, the MAC scheduling signaling is composed of a MAC subheader (MAC subheader) and a MAC CE (Control Element, Control Element). The format of the MAC subheader is as shown in Table 2. Compared with the prior art, the MAC subheader used to indicate the joint transmission establishment needs to define a new LCID (Logical Channel Identify) and L (Length) domain, and the LCID indicates the corresponding The MAC CE is used to establish a joint transmission link, and the L domain is used to indicate the size of the corresponding MAC CE. The MAC CE corresponding to the joint transmission setup request includes one or more identifiers of the UE, and the format thereof may include the first RNTI and the second RNTI of the UE as exemplified in Table 3. It should be noted that, in order to implement the joint transmission link for multiple UEs at the same time, the eNB may include multiple MAC layer scheduling signalings for indicating joint transmission establishment in one MAC PDU, and MAC subheader of these scheduling signaling. The LCIDs all indicate that the corresponding MAC CE is used to establish a joint transmission link, but different MAC CEs carry different UE identifiers.

Taking UE as UE1 and UE2 as an example, the specific format of the MAC PDU is as shown in Table 4. In the MAC header field of the MAC PDU, a joint transmission for establishing joint transmission establishment for each UE is established in the MAC header field of the MAC PDU to establish a MAC subheader in the MAC PDU. The MAC subheader for each UE indicating the joint transmission establishment in the MAC payload area establishes a corresponding MAC CE, as shown in Table 5 and Table 6.

Table 2

table 3

UE's first RNTI

The second RNTI table corresponding to the first RNTI of the UE

table 5

Table 6

This embodiment does not limit the specific identifier of the LCID. The content corresponding to the LCID may also be other content. This embodiment does not limit the specific content corresponding to the LCID.

In addition, the joint transmission setup request includes, in addition to the first RNTI and the second RNTI, a UL grant (Uplink grant) used when the uplink data is jointly transmitted for the first time. This embodiment does not limit the specific content included in the joint transmission establishment request.

403: The Type2 relay receives the joint transmission establishment request, establishes a joint transmission link with the eNB according to the joint transmission establishment request, and returns a joint transmission establishment acknowledgement message.

The method in which the eNB sends the joint transmission setup request including the UE identifier to the Type 2 relay in the step 402, the manner in which the Type 2 relay receives the joint transmission setup request and the eNB sends the joint transmission setup including the UE identifier to the Type 2 relay in step 402. The way the request corresponds.

If the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay in step 402, the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay through the RRC signaling, and the Type2 relay receives the joint transmission setup request. : The Type 2 relay receives the joint transmission setup request through RRC signaling.

If the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay in step 402, the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay through the scheduling signaling of the MAC, and the Type2 relay receives the joint transmission setup request. The mode is: Type2 relay receives the joint transmission establishment request through the scheduling signaling of the MAC. This embodiment does not limit the specific method for the Type 2 relay to receive the joint transmission establishment request. In addition, after the Type 2 relay establishes a joint transmission link with the eNB according to the joint transmission establishment request, the Type 2 relay monitors the PDCCH (Physical Downlink Control Channel) in addition to the third RNTI of the Type 2 relay itself. In addition to obtaining the configuration information corresponding to the third RNTI, the PDCCH is also monitored by the first RNTI and the second RNTI to obtain one.

Configuration information corresponding to the RNTI and the second RNTI.

404: The eNB receives a joint transmission setup acknowledgement message.

By performing step 401 to step 404, a joint transmission link with the UE is established between the eNB and the Type 2 relay, and the UE is a UE that needs to perform uplink data transmission through the joint transmission link. The joint transmission link is configured to: when the eNB does not successfully receive the uplink data sent by the UE, transmit the retransmission request sent by the eNB and the uplink data sent by the UE sent by the Type2 relay to the eNB according to the retransmission request.

In addition, when performing the method provided in this embodiment, it is not necessary to perform step 401 to step 404 every time, that is, when the first eNB establishes a joint transmission link with the Type 2 relay, the step is performed, and the subsequent uplink data is transmitted. At this time, the joint transmission link established in steps 401 to 404 can be directly utilized, thereby continuing the following steps. However, when a UE that needs to perform uplink data transmission through the joint transmission link needs to change the UE that performs uplink data transmission through the joint transmission link, step 401 to step 404 may be re-executed to establish a new UE. Joint transmission link.

405: The eNB sends a UL grant of the UE to the UE.

The embodiment does not limit the manner in which the eNB sends the UL grant of the UE to the UE, including but not limited to, the eNB sends the UL grant scrambled by the first RNTI to the UE through the PDCCH.

For example, the eNB sends the UL grant scrambled by the first RNTI to the UE through the PDCCH at the time N.

406: The UE receives the UL grant of the UE, and the Type2 relay acquires the UL grant of the UE. This embodiment does not limit the specific method for the UE to receive the UL grant of the UE, including but not limited to, the UE monitors the PDCCH with the first RNTI, and when the UL grant of the UE scrambled by the first RNTI is monitored, the first RNTI is acquired. Perturbed UE's UL grant The present embodiment does not limit the specific method for the Type 2 relay to obtain the UL grant of the UE, including but not limited to: After the Type 2 relay establishes the joint transmission link for the UE in step 403, the PDCCH is monitored in real time by the first RNTI, and when the PDCCH is monitored, Obtaining the UL grant of the UE scrambled by the first RNTI when the UL grant of the UE scrambled by the first RNTI

For example, when the Type 2 relay listens to the UL grant of the UE scrambled by the first RNTI, the UL grant of the UE scrambled by the first RNTI is obtained.

It should be noted that, in the step 406, the Type 2 relay obtains the UL grant of the UE for the first time, and the joint transmission establishment request received by the Type 2 relay in the step 403 further includes the UL grant used for the first joint transmission of the uplink data. In addition to the manner in which the UL grant is obtained according to the first RNTI, the Type2 relay may obtain the UL grant used when the uplink data is jointly transmitted from the joint transmission establishment request, and the UL used for the first joint transmission of the uplink data. Grant is used as the UL grant of the UE. This embodiment does not limit the specific method for the Type2 relay to obtain the UL grant of the UE for the first time.

407: The UE sends uplink data to the eNB according to the UL grant of the UE.

Since the UR grant indicates information such as the time-frequency resource and the modulation and coding scheme used by the UE to transmit the uplink data, the UE processes the uplink data according to the modulation and coding scheme indicated by the UL grant at the time of the N+4, and uses the UL. The time-frequency resource indicated by the grant transmits the processed uplink data to the eNB through a PUSCH (Physical Uplink Shared Channel).

408: The eNB receives the uplink data sent by the UE, and the Type2 relay acquires the uplink data sent by the UE.

This embodiment does not limit the specific manner in which the eNB receives the uplink data sent by the UE. For example: Receive uplink data sent by the UE according to the UL grant.

Specifically, the UR grant indicates information such as the time-frequency resource used by the UE to transmit the uplink data. Therefore, the eNB receives the uplink data sent by the UE through the PUSCH by using the time-frequency resource indicated by the UL grant at the time of the N+4th.

The embodiment does not limit the specific manner in which the Type2 relay receives the uplink data sent by the UE. Set. For example: Obtain uplink data sent by the UE according to the UL grant.

Specifically, the UL grant indicates the information such as the time-frequency resource used by the UE to send the uplink data. Therefore, after the Type 2 relay acquires the UL grant of the UE, the UL grant is used at the time of the N+4. For example, the eNB receives the uplink sent by the UE1. Data 1, while the Type2 relay acquires the uplink data 1 sent by UE1.

It should be noted that, after performing the step 408 of receiving the uplink data sent by the UE, the eNB determines whether the uplink data sent by the UE is successfully received. If the uplink data sent by the UE is successfully received, the ACK is fed back to the UE at the time of the N+8. If the UE still needs to continue to send the uplink data, the eNB may perform the step 405 to the step 408 after the ACK is fed back to complete the UE. A new UL grant of the UE is sent, and the uplink data sent by the UE according to the new UL grant is received, until the uplink data transmission of the UE is completed.

If the uplink data is not successfully received, the ACK is still fed back to the UE at the time of the N+8. After the eNB feeds back the ACK, the eNB performs the following steps 409 to 411 to re-receive the uplink data of the UE sent by the Type2 relay.

409: The eNB sends a retransmission request including the UE identifier to the Type2 relay through the joint transmission link. The retransmission request may be a new UL grant including the UE identifier, or may be a fixed length indication information including the UE identifier, or only the DCI (downlink control information) of the UE identifier and the modulation and coding scheme. This embodiment does not limit the specific form of the retransmission request.

In order to prevent the multiple UEs from transmitting the uplink data at the same time, the eNBs are different in the Nth time when the UL grants of the UEs are sent to the UEs, so that the N+8 times of the uplink data sent by the UEs are different, therefore, the eNB is The time for transmitting the retransmission request including the UE identifier to the Type 2 relay after the uplink data is not successfully received is not the same. That is, the eNB sends a retransmission request including the UE identifier to the Type 2 relay for one UE at the same time.

In this embodiment, the eNB does not send the UE identifier including the UE identifier to the Type2 relay through the joint transmission link. The method of retransmitting the request is limited. For example, the UE is identified as the first RNTI, and the second RNTI is associated with the first RNTI, and the second RNTI can also be used as the UE identifier. Therefore, the eNB can determine the second RNTI as the UE identifier, and connect to the Type2 through the joint transmission link. The relay transmits a retransmission request scrambled by the second RNTI.

For example, the eNB does not successfully receive the uplink data sent by the UE2, and the eNB uses the joint transmission link to

The Type2 relay sends a new UL grant scrambled with C-RNTI2'. Alternatively, the eNB transmits the indication of the length of the lbit (bit) scrambled by the C-RNTI 2' to the Type 2 relay through the joint transmission link. Alternatively, the eNB transmits the DCI of the modulation coding scheme 1 scrambled by the C-RNTI 2' to the Type 2 relay through the joint transmission link.

The fixed length may also be other lengths. This embodiment does not limit the specific length of the fixed length.

410: The Type2 relay receives the retransmission request, and sends the uplink data of the UE to the eNB through the joint transmission link according to the retransmission request.

The time when the Type 2 relay acquires the uplink data sent by the UE in step 408 is the N+8th time, and the time when the Type2 relay receives the retransmission request is a certain time after the N+8th time, therefore, at the time of the N+8th The Type2 relay also obtains the uplink data sent by other UEs in step 408. After receiving the retransmission request, the Type2 relay determines that the uplink data needs to be sent in the uplink data sent by each UE according to the retransmission request, and sends the uplink data to the eNB.

The manner in which the Type 2 relay sends the uplink data to the eNB is different according to the format of the retransmission request. This embodiment does not limit the specific manner in which the Type 2 relay sends uplink data to the eNB.

For example, if the retransmission request is a new UL grant, the new UL grant will indicate the time-frequency resource and modulation and coding scheme used by the Type2 relay to send uplink data. Therefore, the Type2 relay will follow the N+12 time. The modulation coding scheme indicated by the new UL grant processes the uplink data of the UE, and transmits the processed uplink data to the eNB through the joint transmission link by using the time-frequency resource indicated by the new UL grant. If the retransmission request is the indication information, the Type2 relay processes the uplink data of the UE according to the modulation and coding scheme indicated by the UL grant of the UE acquired in step 406 at the time of the N+12, and uses the UL grant indication of the UE. The frequency resource sends the processed uplink data to the eNB through the joint transmission link.

If the retransmission request is a DCI, since the DCI includes a modulation and coding scheme, but does not include a time-frequency resource, the Type2 relay processes the uplink data of the UE according to the modulation and coding scheme in the DCI at the time of the N+12, and uses step 406. The time-frequency resource indicated by the UL grant of the obtained UE transmits the processed uplink data to the eNB through the joint transmission link.

In addition, this embodiment does not limit the method for determining that the upload data needs to be sent in the uplink data sent by each UE obtained according to the retransmission request. Including but not limited to: since one retransmission request is for only one UE, and the first RNTI is the first RNTI of the UE, so that the UE corresponds to the first RNTI, and the second RNTI corresponds to the first RNTI, and thus the second The RNTI corresponds to the UE. Therefore, according to the second RNTI of the retransmission request and the first RNTI and the second RNTI in the joint transmission setup request received in step 403, the UE corresponding to the second RNTI may be determined, and therefore, the acquired UE is sent by the UE. The upload data of the UE corresponding to the second RNTI that selects the scrambling retransmission request in the uplink data is that the upload data needs to be sent.

For example, the Type 2 relay obtains the uplink data sent by the UE1 and the uplink data sent by the UE2. The Type2 relay determines the first RNTI corresponding to the C-RNTI2' according to the correspondence between the C-RNTI2' and the Table 1 of the scrambling retransmission request. The C-RNTI2 and the C-RNTI2 are the first RNTI of the UE2. Therefore, the uplink data transmitted by the UE2 and the uplink data sent by the UE2 are selected as the uplink data to be transmitted.

411: The eNB receives the uplink data sent by the Type2 relay.

After performing step 409 to step 411, the eNB successfully receives the uplink data of the UE, but the uplink data of the UE is sent by the Type2 relay, and the uplink data of the UE sent by the Type2 relay is the Type 2 relay. After the uplink authorization, the uplink data sent by the UE received in step 408 according to the uplink grant according to the uplink grant. In addition, after performing the step 409 to the step 411, after the eNB successfully re-receives the uplink data, if the UE further needs to continue to send the uplink data, the step 405 to the step 408 may be repeatedly performed to complete the new UL grant for the UE. And receiving the uplink data sent by the UE according to the new UL grant until the uplink data transmission of the UE is completed.

It should be noted that, after performing the step 401 to the step 404, after the joint transmission link with the UE is established between the eNB and the Type 2 relay, the eNB also releases the joint transmission link. The specific method for releasing the joint transmission link is not limited in this embodiment. The joint transmission link established between the eNB and the Type 2 relay is established by the method for releasing the joint transmission link provided in the following fourth embodiment. See an embodiment of the method of releasing a joint transmission link as shown in Figure 6 below.

The method provided by the embodiment of the present invention, after determining the first device that needs to perform uplink data transmission through the joint transmission link, and establishing the joint transmission link with the second device with the second device, when the first device is not successfully received, Receiving the uplink data sent by the second device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, thereby preventing the first device from retransmitting the same uplink data, and reducing The probability that the first device retransmits the same uplink data, thereby meeting the demand for high-rate data services. Another embodiment of the present invention provides a method for transmitting uplink data, which is combined with the foregoing implementation environment and the content of the embodiment. For convenience of description, in this embodiment, the macro base station is an eNB, and the second device is a Type 2 relay, and the first device is The UE is identified as the first RNTI of the UE, and the joint transmission setup request includes the first RNT of the UE as an example. The method for transmitting uplink data provided in this embodiment will be described. Referring to FIG. 5, the method process provided by this embodiment includes:

501: The eNB determines a UE that needs to perform uplink data transmission through the joint transmission link.

For details of the specific implementation of the step, refer to the description of step 401 in the second embodiment, and details are not described herein.

502: The eNB sends a joint transmission setup request including the UE identifier to the Type2 relay.

The UE identifier is the first RNTI of the UE, and the joint transmission setup request includes the first of the UE. RNTI. The first RNTI is an RNTI that the UE is using, and the RNTI may be one or more of a C-RNTI, a TC-RNTI, and an SPS C-RNTI.

This embodiment does not limit the specific method for the eNB to send a joint transmission establishment request including the UE identity to the Type2 relay. In addition, the eNB sends a joint transmission setup request including the UE identifier to the Type2 relay through RRC signaling; or the eNB sends a joint transmission setup request including the UE identifier to the Type2 relay through the scheduling signaling of the MAC.

In addition, the specific form of the first RNTI is changed according to the manner in which the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay, and the specific transmission establishment request does not include the specific RNTI. The form is limited.

If the eNB sends the joint transmission setup request including the UE identifier to the Type 2 relay, the eNB sends the joint transmission setup request including the UE identifier to the Type 2 relay through the RRC signaling, and the specific form of the joint transmission setup request including the first RNTI may be The joint transmission setup request includes the first RNTI in the form of a corresponding list shown in Table 7.

Table 7

First RNTI

C-RNTI 1

C-RNTI2, where C-RNTI1 is the first RNTI of UE1, and C-RNTI2 is the first RNTL of UE2. If the eNB sends a joint transmission setup request including the UE identity to the Type2 relay, the eNB performs scheduling signaling through the MAC. The Type2 relay sends a joint transmission setup request including the UE identifier, and the MAC scheduling signaling used to indicate the joint transmission request is included in the MAC PDU, where the MAC scheduling signaling is composed of a MAC subheader and a MAC CE. The format of the MAC subheader is shown in Table 2. Compared to the prior art, the MAC subheader used to indicate the joint transmission establishment needs to be defined. The new LCID and L domain, the LCID indicates that the corresponding MAC CE is used to establish a joint transmission link, and the L domain is used to indicate the size of the corresponding MAC CE. The MAC CE corresponding to the joint transmission setup request includes one or more identifiers of the UE. For example, the MAC CE corresponding to the joint transmission setup request includes the first RNTI of the UE. It should be noted that, in order to implement the joint transmission link for multiple UEs at the same time, the eNB may include multiple MAC layer scheduling signalings for indicating joint transmission establishment in one MAC PDU, and MAC subheader of these scheduling signalings. The LCIDs all indicate that the corresponding MAC CE is used to establish a joint transmission link, but different MAC CEs carry different UE identifiers.

Taking UE as UE1 and UE2 as an example, the specific format of the MAC PDU is as shown in Table 4. In the MAC header field of the MAC PDU, a MAC subheader ₀ for indicating joint transmission establishment is established for each UE. The MAC address of the MAC PDU is valid. The MAC subheader for indicating the joint transmission establishment for each UE in the payload area establishes a corresponding MAC CE, that is, the MAC subheader for the UE1 indicating the joint transmission establishment in the MAC payload area of the MAC PDU establishes a corresponding MAC CE: C - RNTI1, for the MAC subheader of UE2 indicating the joint transmission establishment, establish a corresponding MAC CE: C-RNTI2.

In addition, the joint transmission setup request may include, in addition to the first RNTI, a UL grant used when the uplink data is jointly transmitted for the first time. This embodiment does not limit the specific content included in the joint transmission establishment request.

503: The Type2 relay receives the joint transmission setup request, establishes a joint transmission link with the eNB according to the joint transmission establishment request, and returns a joint transmission establishment acknowledgement message.

For details of the implementation of the step, refer to the description of step 403 in the foregoing second embodiment, and details are not described herein.

In addition, after the Type 2 relay establishes a joint transmission link with the eNB with the eNB according to the joint transmission establishment request, the Type 2 relay monitors the PDCCH with the third RNTI of the Type 2 relay itself to obtain the configuration information corresponding to the third RNTI. The PDCCH is also monitored by the first RNTI to obtain configuration information corresponding to an RNTI.

504: The eNB receives a joint transmission setup acknowledgement message. By performing step 501 to step 504, a joint transmission link with the UE is established between the eNB and the Type 2 relay, and the UE is a UE that needs to perform uplink data transmission through the joint transmission link. The joint transmission link is used to transmit, when the eNB does not successfully receive the uplink data sent by the UE, the retransmission request sent by the eNB and the uplink data sent by the UE sent by the Type2 relay to the eNB according to the retransmission request.

In addition, when performing the method provided in this embodiment, it is not necessary to perform step 501 to step every time.

504, that is, when the first eNB establishes a joint transmission link with the Type2 relay, the step is performed, and when the subsequent uplink data is transmitted, the joint transmission link established in steps 501 to 504 can be directly used, thereby continuing to execute. Steps. However, when the UE that needs to perform uplink data transmission through the joint transmission link changes, that is, when the UE that needs to perform uplink data transmission through the joint transmission link needs to be added, step 501 to step 504 may be re-executed to establish a new UE. Joint transmission link.

505: The eNB sends a UL grant of the UE to the UE.

For details of the implementation of the step, refer to the description of step 405 in the second embodiment, and details are not described herein.

506: The UE receives the UL grant of the UE, and the Type2 relay acquires the UL grant of the UE. For details of the specific implementation of the step, refer to the description of step 406 in the second embodiment, and details are not described herein.

507: The UE sends uplink data to the eNB according to the UL grant of the UE.

For details of the implementation of the step, refer to the description of step 407 in the foregoing embodiment 2, and details are not described herein.

508: The eNB receives the uplink data sent by the UE, and the Type2 relay acquires the uplink data sent by the UE.

For details of the implementation of the step, refer to the description of step 408 in the second embodiment, and details are not described herein.

It should be noted that, after performing the step 508 to receive the uplink data sent by the UE, the eNB determines whether the uplink data sent by the UE is successfully received. If the uplink data sent by the UE is successfully received, the ACK is fed back to the UE at the time of the N+8, and if the UE still needs to continue to send the uplink data, the eNB After the ACK is fed back, step 505 to step 508 may be repeatedly performed to complete the new UL grant for the UE, and the uplink data sent by the UE according to the new UL grant is received until the uplink data transmission of the UE is completed.

If the uplink data is not successfully received, the ACK is still fed back to the UE at the time of the N+8. After the eNB feeds back the ACK, the eNB performs the following steps 509 to 511 to re-receive the uplink data of the UE sent by the Type2 relay.

509: The eNB sends a retransmission request including the UE identifier to the Type2 relay through the joint transmission link. The retransmission request may be a new UL grant including the identifier of the UE, or may be a fixed-length indication information including the identifier of the UE, or a DCI including only the identifier of the UE and the modulation and coding scheme. The form is limited.

This embodiment does not limit the method in which the eNB sends a retransmission request including the UE identity to the Type 2 relay through the joint transmission link. For example: The eNB determines the third RNTI of the Type 2 relay, and sends a retransmission request including the UE identifier scrambled by the third RNTI to the Type 2 relay through the joint transmission link.

For example, the eNB does not successfully receive the uplink data sent by the UE2, and the third RNTI of the Type2 relay is the C-RNTI3. The eNB sends a new UL grant including the UE identifier scrambled by the C-RNTI3 to the Type2 relay through the joint transmission link. Alternatively, the eNB sends the indication information including the UE identifier of the lbit (bit) length scrambled by C-RNTI3 to the Type 2 relay through the joint transmission link. Alternatively, the eNB transmits the UE identifier scrambled by C-RNTI3 and the DCI of the modulation and coding scheme 1 to the Type 2 relay through the joint transmission link.

510: The Type2 relay receives the retransmission request, and sends the uplink data of the UE to the eNB by using the joint transmission link according to the retransmission request. The time when the Type 2 relay acquires the uplink data sent by the UE in step 508 is the N+8th time, and the time when the Type2 relay receives the retransmission request is a certain time after the N+8th time, therefore, at the time of the N+8th The Type2 relay also obtains the uplink data sent by other UEs in step 508. After receiving the retransmission request, the Type2 relay determines, according to the retransmission request, the uplink data that is sent by each UE, and sends the uplink data to the eNB.

For example, if the retransmission request is a new UL grant, the new UL grant will indicate the time-frequency resource and modulation and coding scheme used by the Type2 relay to send uplink data. Therefore, the Type2 relay will follow the N+12 time. The modulation coding scheme indicated by the new UL grant processes the uplink data of the UE, and transmits the processed uplink data to the eNB through the joint transmission link by using the time-frequency resource indicated by the new UL grant.

If the retransmission request is the indication information, the Type2 relay processes the uplink data of the UE according to the modulation and coding scheme indicated by the UL grant of the UE acquired in step 506 at the time of the N+12, and uses the UL grant indication of the UE. The frequency resource sends the processed uplink data to the eNB through the joint transmission link.

If the retransmission request is a DCI, since the DCI includes a modulation and coding scheme, but does not include a time-frequency resource, the Type2 relay processes the uplink data of the UE according to the modulation and coding scheme in the DCI at the time of the N+12, and uses step 506. The time-frequency resource indicated by the UL grant of the obtained UE transmits the processed uplink data to the eNB through the joint transmission link.

In addition, this embodiment does not limit the method for determining that the upload data needs to be sent in the uplink data sent by each UE obtained according to the retransmission request. The uploading data of the UE corresponding to the UE identifier in the retransmission request is selected to be sent in the uplink data sent by each UE.

It should be noted that the foregoing description of step 509 and step 510 may be directed to the eNB and the Type 2 The relay establishes a joint transmission link with respect to a plurality of UEs, and may also establish only a joint transmission link with respect to one UE for the eNB and the Type 2 relay. For the case where the eNB and the Type 2 relay only establish a joint transmission link for one UE, since the Type 2 relay can only receive the uplink data sent by one UE, the retransmission request sent by the eNB is only for the UE that the Type 2 relay can receive. Therefore, in step 509, the retransmission request sent by the eNB may not include the UE identifier, that is, the retransmission request is sent by: the eNB determines the third RNTI of the Type 2 relay, and sends the third RNTI to the Type 2 relay through the joint transmission link. The third RNTI scrambled retransmission request. At the same time, when performing step 510, the Type2 relay can only receive uplink data sent by one UE. Therefore, even if the received retransmission request does not include the UE identifier, it can be determined that the retransmission request can be received only for the Type2 relay. To the UE. The Type2 relay may send the received uplink data sent by the UE to the eNB according to the retransmission request.

For example, for the case where the eNB and the Type 2 relay only establish a joint transmission link with respect to the UE4, since the Type2 relay can only receive the uplink data sent by the UE4, the retransmission request sent by the eNB is also only for the UE4. Therefore, in step 509, the eNB determines the third RNTI of the Type 2 relay, and sends a retransmission request scrambled by the third RNTI to the Type 2 relay through the joint transmission link. At the same time, when the step 510 is performed, the Type 2 relay can only receive the uplink data sent by the UE4. Therefore, even if the received retransmission request does not include the identifier of the UE4, the retransmission request can be determined only for the UE4. The Type2 relay can send the received uplink data sent by the UE4 to the cNB according to the retransmission request.

511: The eNB receives the uplink data sent by the Type2 relay.

After performing step 509 to step 511, the eNB successfully receives the uplink data of the UE, but the uplink data of the UE is sent by the Type2 relay, and the uplink data of the UE sent by the Type2 relay is

After the Type 2 relay obtains the uplink grant from the UE after the step 506, the uplink data that the UE receives in step 508 according to the uplink grant is sent according to the uplink grant.

In addition, after performing the step 509 to the step 511, after the eNB successfully re-receives the uplink data, if the UE further needs to continue to send the uplink data, step 505 to step 508 may be repeatedly performed. The UE becomes the new UL grant of the UE, and receives the uplink data sent by the UE according to the new UL grant until the uplink data transmission of the UE is completed.

It should be noted that, after performing the step 501 to the step 504, after the joint transmission link with the UE is established between the eNB and the Type 2 relay, the eNB also releases the joint transmission link. The specific method for releasing the joint transmission link is not limited in this embodiment. The joint transmission link established between the eNB and the Type 2 relay is established by the method for releasing the joint transmission link provided in the following fourth embodiment. See example four.

The method provided by the embodiment of the present invention, after determining the first device that needs to perform uplink data transmission through the joint transmission link, and establishing the joint transmission link with the second device with the second device, when the first device is not successfully received, Receiving the uplink data sent by the second device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, thereby preventing the first device from retransmitting the same uplink data, and reducing The probability that the first device retransmits the same uplink data, thereby meeting the demand for high-rate data services. Another embodiment of the present invention provides a method for releasing a joint transmission link. For convenience of description, in this embodiment, a macro base station is used as an eNB, a second device is a Type 2 relay, and a first device is a UE. The method flow for the pair includes:

601: The eNB determines whether the joint transmission link needs to be released. If the joint transmission link needs to be released, step 602 is performed. If the joint transmission link does not need to be released, the process of releasing the joint transmission link provided in this embodiment is terminated. .

This embodiment does not limit the specific method for the eNB to determine whether it is necessary to release the joint transmission link. Including but not limited to: the eNB receives the current CQI sent by the UE; if the current CQI is higher than the second threshold, the eNB determines that the joint transmission link needs to be released. Or when the uplink data transmission of the UE is completed, the eNB determines that the joint transmission link needs to be released.

Taking the joint transmission link for UE1 and UE2 as an example, the eNB receives UE1 and UE2. The current CQI sent by each UE, wherein the current CQI1 sent by UE1 is 0.5, and the current CQI2 sent by UE2 is 2. If the second threshold is 1, since CQI1 is lower than the second threshold and CQI2 is higher than the second threshold, the eNB needs to release the joint transmission link with respect to UE2. Alternatively, if the uplink data transmission of UE2 is completed, the eNB determines that it is necessary to release the joint transmission link with respect to UE2.

Of course, the second threshold may also be other values. This embodiment does not limit the specific value of the second threshold. The second threshold may be the same as or different from the first threshold in the above embodiment. This embodiment does not limit whether the second threshold is the same as the first threshold.

602: The eNB sends a joint transmission release message including the UE identifier to the Type2 relay.

The specific method for the eNB to send the joint transmission release message including the UE identifier to the Type 2 relay corresponds to the method for the eNB to send the joint transmission setup request including the UE identifier to the Type 2 relay. In this embodiment, the eNB does not send the joint transmission including the UE identifier to the Type 2 relay. The specific method of releasing the message is limited.

If the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay, the eNB sends the joint transmission setup request including the UE identifier to the Type2 relay through the RRC signaling, and the eNB sends the joint transmission release message including the UE identifier to the Type2 relay. The method is: The eNB sends a joint transmission release message including the UE identifier to the Type2 relay through RRC signaling.

If the eNB sends the joint transmission setup request including the UE identity to the Type 2 relay, the eNB sends the joint transmission setup request including the UE identifier to the Type 2 relay by using the scheduling signaling of the MAC, and the eNB sends the joint transmission including the UE identifier to the Type 2 relay. The method for releasing the message is: The eNB sends a joint transmission release message including the UE identifier to the Type2 relay through the scheduling signaling of the MAC.

For example, the eNB sends the joint transmission release message including the ID2 to the Type2 relay through the RRC signaling. Alternatively, the eNB sends the joint transmission release message including the ID2 to the Type2 relay through the scheduling signaling of the MAC.

In addition, a mode for the eNB to send the joint transmission release message including the UE identifier to the Type2 relay by using the scheduling signaling of the MAC, and in specific implementation, the MAC tone for indicating the joint transmission release The degree signaling is included in the MAC PDU, which is composed of two parts: a MAC subheader and a MAC CE. The format of the MAC subheader is as shown in Table 2. Compared with the prior art, the MAC subheader used to indicate the joint transmission release needs to define a new LCID and L domain, and the LCID indicates that the corresponding MAC CE is used to release the joint transmission link, the L domain. Used to indicate the size of the corresponding MAC CE. The MAC CE corresponding to the joint transmission release message includes one or more identifiers of the UE, for example, the MAC CE corresponding to the joint transmission release message includes the UE identifier. It should be noted that, in order to implement simultaneous release of the joint transmission link for multiple UEs, the eNB may include multiple MAC layer scheduling signalings for indicating joint transmission release messages in one MAC PDU, and MAC addresses of these scheduling signalings. The LCID of the subheader indicates that the corresponding MAC CE is used to release the joint transmission link, but different MAC CEs carry different UE identifiers.

Taking the UE as the UE1 and the UE2 as an example, the specific format of the MAC PDU is as shown in Table 8. In the MAC header field of the MAC PDU, a MAC subheader for indicating the joint transmission release is established for the UE in the MAC payload area of the MAC PDU. The MAC subheader for indicating the joint transmission release for each UE establishes a corresponding MAC CE, and the MAC subheader for indicating the joint transmission release of the UE1 in the MAC payload area of the MAC PDU establishes a corresponding MAC CE: ID1, for the UE2 The MAC subheader used to indicate the joint transmission release establishes the corresponding MAC CE: ID2.

Table 8

603: The Type2 relay receives the joint transmission release message, and releases the joint transmission link with respect to the UE according to the joint transmission release message.

The manner in which the eNB sends the joint transmission release message including the UE identifier to the Type 2 relay in the step 602, the manner in which the Type 2 relay receives the joint transmission release message and the step 602 The medium eNB corresponds to the manner in which the Type 2 relay sends the joint transmission release message including the UE identity. If the eNB sends the joint transmission release message including the UE identity to the Type 2 relay in the step 602, the eNB sends the joint transmission release message including the UE identifier to the Type 2 relay through the RRC signaling, and the Type2 relay receives the joint transmission release message. : The Type2 relay receives the joint transmission release message through RRC signaling.

If the eNB sends the joint transmission release message including the UE identifier to the Type2 relay in step 602, the eNB sends the joint transmission release message including the UE identifier to the Type2 relay through the scheduling signaling of the MAC, and the Type2 relay receives the joint transmission release message. The mode is: Type2 relay receives the joint transmission release message by scheduling signaling of the MAC.

This embodiment does not limit the specific method for the Type 2 relay to receive the joint transmission release message. In addition, releasing the joint transmission link about the UE according to the joint transmission release message includes: stopping using the first RNTI of the UE to monitor the PDCCH, releasing the first RNTI, or releasing the first RNTI and the second RNTI, and releasing the required uplink transmission for the UE. Resources, etc. This embodiment does not define a specific release content for releasing a joint transmission link with respect to a UE according to a joint transmission release message.

In the method provided by the embodiment of the present invention, when the signal quality of the macro base station received by the first device becomes strong, the joint transmission link is released, and the dynamic establishment and release of the joint transmission link is implemented, thereby dynamically adjusting resources required for uplink data transmission. Another embodiment of the present invention provides a macro base station, where the macro base station is configured to perform the function performed by the macro base station in the method for transmitting uplink data provided by any one of the foregoing embodiments shown in FIG. 2 to FIG. . Referring to Figure 7, the macro base station includes:

a determining module 701, configured to determine a first device that needs to perform uplink data transmission by using a joint transmission link;

The sending module 702 is configured to send, to the second device, a joint transmission establishment request that includes the first device identifier determined by the determining module 701;

The receiving module 703 is configured to receive the joint transmission established by the joint transmission link of the first device. The acknowledgement message, the joint transmission link of the first device is established by the second device according to the joint transmission establishment request sent by the sending module 702;

Optionally, the sending module 702 is further configured to send the uplink authorization of the first device to the first device. Optionally, the receiving module 703 is further configured to receive the uplink data sent by the first device according to the uplink authorization sent by the sending module 702. ;

Optionally, the sending module 702 is further configured to: when the receiving module 703 does not successfully receive the uplink data, send a retransmission request including the first device identifier to the second device by using the joint transmission link;

Optionally, the receiving module 703 is further configured to receive uplink data that is sent by the second device according to the retransmission request sent by the sending module 702, and the uplink data sent by the second device is used by the second device to obtain the first device. After the uplink authorization, the uplink data sent by the first device according to the uplink authorization is received according to the uplink authorization.

Referring to Figure 8, the determining module 701 includes:

The receiving unit 7011 is configured to receive a current channel quality indicator sent by the first device.

The determining unit 7012 is configured to determine, when the current channel quality indicator received by the receiving unit 7011 is lower than the first threshold, that the first device is the first device that needs to perform uplink data transmission by using the joint transmission link.

Optionally, the determining module 701 is further configured to determine whether the joint transmission link needs to be released. Optionally, the sending module 702 is further configured to send, when the determining module 701 determines that the joint transmission link needs to be released, to the second device, including The joint transmission release message of the first device identifier causes the second device to release the joint transmission link with respect to the first device according to the joint transmission release message.

Optionally, the receiving unit 7011 is further configured to receive the current channel quality indicator sent by the first device. Optionally, the determining unit 7012 is further configured to: when the current channel quality indicator received by the receiving unit 7011 is higher than the second threshold When you are sure, you need to release the joint transport link.

Optionally, the determining module 701 is further configured to: when the uplink data transmission of the first device is completed, determine that the joint transmission link needs to be released.

Optionally, the sending module 702 is further configured to send the packet to the second device by using radio resource control signaling. The joint transmission establishment request of the first device identifier is sent; or the joint transmission establishment request including the first device identifier is sent to the second device by using the scheduling signaling of the medium access control layer.

Optionally, the joint transmission establishment request sent by the sending module 702 further includes a first wireless network temporary identifier RNTI of the first device;

The sending module 702 is further configured to send, to the first device, an uplink grant that is scrambled by the first RNTI. Optionally, the joint transmission setup request sent by the sending module 702 further includes a second RNTI corresponding to the first RNTI;

The sending module 702 is further configured to: use the second RNTI as the first device identifier, and send, by using the joint transmission link, a retransmission request that is scrambled by the second RNTI to the second device.

Optionally, the sending module 702 is further configured to determine a third RNTI of the second device, and send, by using the joint transmission link, a retransmission request including the first device identifier that is scrambled by the third RNTI to the second device.

Optionally, the uplink grant sent by the sending module 702 includes a time-frequency resource;

The sending module 702 is further configured to send, by using the joint transmission link, a retransmission request with the first device identifier and the modulation and coding scheme to the second device;

Optionally, the receiving module 703 is further configured to: after receiving, by the second device, the uplink data of the first device by using the modulation and coding scheme in the retransmission request, the processed uplink sent by using the time-frequency resource through the joint transmission link data.

The joint transmission setup request sent by the sending module 702 further includes an uplink grant used when the uplink data is jointly transmitted for the first time.

The macro base station provided in this embodiment, after determining the first device that needs to perform uplink data transmission through the joint transmission link, and establishing a joint transmission link with the second device with the second device, when the first device is not successfully received, Receiving the uplink data sent by the second device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, thereby preventing the first device from retransmitting the same uplink data, and reducing The probability that the first device retransmits the same uplink data, thereby meeting the demand for high-rate data services. Another embodiment of the present invention provides an apparatus for performing the functions performed by the macro base station provided by any of the embodiments shown in FIG. 2 to FIG. The device comprises: a receiver, a processor, a transmitter;

The processor is configured to determine a first device that needs to perform uplink data transmission through a joint transmission link.

a receiver, configured to receive a joint transmission setup acknowledgement message returned by the second device after establishing a joint transmission link with the first device according to the joint transmission setup request; receiving uplink data sent by the first device according to the uplink grant; receiving the second device according to Retransmitting the uplink data sent by the joint transmission link, and the uplink data sent by the second device is the uplink data sent by the first device according to the uplink authorization after the second device obtains the uplink authorization of the first device, according to the uplink authorization. .

a transmitter, configured to send, to the second device, a joint transmission establishment request including the first device identifier; to send, to the first device, an uplink authorization of the first device; when the uplink data is not successfully received, to the second device by using the joint transmission link A retransmission request including the first device identification is sent.

The receiver is further configured to receive a current channel quality indicator sent by the first device.

The processor is further configured to: if the current channel quality indicator is lower than the first threshold, determine that the first device is the first device that needs to perform uplink data transmission through the joint transmission link.

The processor is further configured to determine whether a joint transmission link needs to be released.

The transmitter is further configured to: when the joint transmission link needs to be released, send a joint transmission release message including the first device identifier to the second device, so that the second device releases the joint transmission chain about the first device according to the joint transmission release message. road.

The processor is further configured to determine that the joint transmission link needs to be released if the current channel quality indicator is higher than the second threshold.

The processor is further configured to determine that the joint transmission link needs to be released when the uplink data transmission of the first device is completed.

The transmitter is further configured to send, by using radio resource control signaling, a joint transmission setup request that includes the first device identifier to the second device, or send the scheduling signaling by the media access control layer to the second device. A joint transmission setup request including the first device identity is sent.

The joint transmission setup request further includes a first radio network temporary identifier RNTI of the first device, where the transmitter is further configured to send, to the first device, an uplink grant scrambled by the first RNTI.

The joint transmission setup request further includes a second RNTI corresponding to the first RNTI, where the processor is further configured to use the second RNTI as the first device identifier, and send the second RNTI to the second device by using the joint transmission link. Retransmission request.

The processor is further configured to determine a third RNTI of the second device, and send, by using the joint transmission link, a retransmission request including the first device identifier scrambled by the third RNTI to the second device.

The transmitter is further configured to send, by the joint transmission link, a retransmission request including the first device identifier and the modulation and coding scheme to the second device.

The receiver is further configured to receive, after the second device processes the uplink data of the first device by using a modulation and coding scheme in the retransmission request, using the processed uplink data sent by the time-frequency resource through the joint transmission link.

The transmitter, the combined transmission setup request sent includes the uplink authorization used when the uplink data is jointly transmitted for the first time.

In summary, the device provided in this embodiment determines the first device that needs to perform uplink data transmission through the joint transmission link, and establishes a joint transmission link with the second device with the second device. Receiving, by the first device, the uplink data sent by the second device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, so as to prevent the first device from retransmitting the same data. The uplink data reduces the probability that the first device retransmits the same uplink data, thereby meeting the demand for high-rate data services. Another embodiment of the present invention provides a second device, where the second device is configured to perform the second device in the method for transmitting uplink data provided by any one of the foregoing embodiments shown in FIG. 2 to FIG. The function performed. Referring to Figure 9, the second device includes:

The receiving module 901 is configured to receive the joint transmission establishment that is sent by the macro base station and includes the first device identifier. Request

The establishing module 902 is configured to establish, according to the joint transmission establishment request received by the receiving module 901, a joint transmission link with the macro base station about the first device;

Returning to the module 903, used to return a joint transmission setup confirmation message;

The obtaining module 904 is configured to obtain an uplink authorization sent by the macro base station to the first device.

Optionally, the obtaining module 904 is further configured to acquire, according to the obtained uplink authorization, uplink data that is sent by the first device to the macro base station;

Optionally, the receiving module 901 is further configured to receive, by using the joint transmission link established by the establishing module 902, a retransmission request that is sent by the macro base station and includes the first device identifier.

The sending module 905 is configured to: when the receiving module 901 receives the retransmission request including the first device identifier sent by the macro base station by using the joint transmission link established by the establishing module 902, the joint transmission link established by the establishing module according to the retransmission request The uplink data of the first device is sent to the macro base station.

Optionally, the receiving module 901 is further configured to receive, by the macro base station, the joint transmission establishment request that is sent by the radio resource control signaling, including the first device identifier, or the receiving macro base station sends the scheduling signaling by using the media access control layer. A joint transmission setup request including the first device identity.

Optionally, the receiving module 901 is further configured to receive a joint transmission release message that is sent by the macro base station and includes the first device identifier.

Referring to FIG. 10, the second device further includes:

The release module 906 is configured to release the joint transmission link with respect to the first device according to the joint transmission release message received by the receiving module 901.

Optionally, the joint transmission establishment request received by the receiving module 901 further includes a first radio network temporary identifier RNTI of the first device;

The obtaining module 904 is further configured to obtain, according to the first RNTI, an uplink grant sent by the macro base station to the first device.

Optionally, the joint transmission establishment request received by the receiving module 901 further includes an uplink authorization used when the uplink data is jointly transmitted for the first time; The obtaining module 904 is further configured to: when acquiring the uplink grant sent by the macro base station to the first device for the first time, obtain the uplink grant used when the first joint transmission of the uplink data is obtained from the joint transmission setup request, and use the uplink data for the first joint transmission. The uplink grant to the uplink grant is sent by the macro base station to the first device.

Optionally, the uplink grant obtained by the obtaining module 904 includes a time-frequency resource, and the retransmission request received by the receiving module 901 includes a first device identifier and a modulation and coding scheme.

The sending module 905 is further configured to: by using a modulation and coding scheme in the retransmission request, the second device provided by the uplink embodiment of the first device, by establishing a joint transmission link with the macro base station, when the macro base station fails to receive the first device successfully. When the uplink data is sent, the uplink data sent by the first device to the macro base station is used to prevent the first device from retransmitting the same uplink data, thereby reducing the probability that the first device retransmits the same uplink data, thereby satisfying the high-rate data service. demand. Another embodiment of the present invention provides an apparatus for performing the functions performed by the second device provided by any of the embodiments shown in FIG. 2 to FIG. The device includes: a receiver, a processor, and a transmitter;

The receiver is configured to receive a joint transmission setup request that is sent by the macro base station, including the first device identifier, obtain an uplink grant sent by the macro base station to the first device, and obtain uplink data that is sent by the first device to the macro base station according to the uplink grant. .

And a processor, configured to establish, according to the joint transmission setup request, a joint transmission link with the macro base station regarding the first device.

a transmitter, configured to return a joint transmission setup acknowledgement message; when receiving, by the joint transmission link, a retransmission request including the first device identifier sent by the macro base station, sending, by using the retransmission request, the first base station to the macro base station according to the retransmission request Upstream data of the device.

The receiver is further configured to receive a joint transmission establishment request that is sent by the macro base station by using the radio resource control signaling, including the first device identifier, or receive the scheduling signaling of the macro base station by using the medium access control layer. A joint transmission setup request including the first device identity is sent.

The receiver is further configured to receive a joint transmission release message that is sent by the macro base station and includes the first device identifier.

The processor is further configured to release the joint transmission link with respect to the first device according to the joint transmission release message.

The receiver is further configured to acquire, according to the first RNTI, an uplink grant sent by the macro base station to the first device. The processor is further configured to: when the uplink authorization sent by the macro base station to the first device is obtained for the first time, obtain the uplink authorization used when the uplink data is jointly transmitted from the joint transmission establishment request, and use the uplink data for the first joint transmission. The uplink grant to the uplink grant is sent by the macro base station to the first device.

The processor is further configured to process the uplink data of the first device by using a modulation and coding scheme in the retransmission request.

The transmitter is further configured to send the processed uplink data through the joint transmission link by using time-frequency resources.

In summary, the device provided in this embodiment establishes a joint transmission link with the macro base station, and when the macro base station fails to receive the uplink data sent by the first device, the uplink data sent by the first device sent by the macro base station is Therefore, the first device is prevented from retransmitting the same uplink data, which reduces the probability that the first device retransmits the same uplink data, thereby meeting the requirement of the high-rate data service. Another embodiment of the present invention provides a transmission system for uplink data, which is used to perform the method for transmitting uplink data provided by any of the embodiments shown in FIG. 2 to FIG. See Figure 11, the system includes:

a macro base station 1101, a second device 1102, and a first device 1103;

The macro base station 1101 is the macro base station provided by the embodiment shown in FIG. 7 or FIG. 8 above, as described in the foregoing embodiment;

The second device 1102 is the second device provided by the embodiment shown in FIG. 9 or FIG. 10 above. Embodiments;

The first device 1103 is configured to send uplink data to the macro base station 1101.

In summary, the system provided in this embodiment determines the first device that needs to perform uplink data transmission through the joint transmission link, and establishes a joint transmission link with the second device with the second device. Receiving, by the first device, the uplink data sent by the second device, where the uplink data sent by the second device is the uplink data sent by the first device received by the second device, so as to prevent the first device from retransmitting the same data. The uplink data reduces the probability that the first device retransmits the same uplink data, thereby meeting the demand for high-rate data services. It should be noted that, in the process of implementing the uplink data transmission, the macro base station and the second device provided by the foregoing embodiments are only illustrated by the division of the foregoing functional modules. In actual applications, the foregoing functions may be allocated differently according to requirements. The function module is completed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the macro base station and the second device provided by the foregoing embodiments are in the same concept as the method for transmitting and transmitting the uplink data. For the specific implementation process, refer to the method embodiment, and details are not described herein again.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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

Claims

Claim

A method for transmitting uplink data, the method comprising:

Determining a first device that needs to perform uplink data transmission through the joint transmission link, and sending a joint transmission establishment request including the first device identifier to the second device;

Receiving, by the second device, the uplink data sent by the joint transmission link according to the retransmission request, where the uplink data sent by the second device is after the second device obtains the uplink authorization of the first device, And receiving, according to the uplink authorization, uplink data that is sent by the first device according to the uplink grant.

The method according to claim 1, wherein the determining, by the first device, the uplink data transmission by using the joint transmission link, includes:

Receiving a current channel quality indicator sent by the first device;

The method according to claim 1, wherein the receiving the second device establishes a joint transmission setup acknowledgement message returned after the joint transmission link of the first device is established according to the joint transmission establishment request. After that, it also includes:

Determining whether the joint transmission link needs to be released;

Sending, to the second device, the first device if the joint transmission link needs to be released The identified joint transmission release message, causing the second device to release the joint transmission link with respect to the first device according to the joint transmission release message.

The method according to claim 3, wherein the determining whether the joint transmission link needs to be released comprises:

Receiving a current channel quality indicator sent by the first device;

The method according to claim 1, wherein the sending, by the second device, the joint transmission establishment request including the first device identifier includes:

The method according to any one of claims 1 to 6, wherein the joint transmission establishment request further includes a first radio network temporary identifier RNTI of the first device;

Sending an uplink grant scrambled by the first RNTI to the first device.

The method according to claim 7, wherein the joint transmission setup request further includes a second RNTI corresponding to the first RNTI; The sending, by the joint transmission link, the retransmission request including the first device identifier to the second device, includes:

And using the second RNTI as the first device identifier, and sending, by using the joint transmission link, a retransmission request that is scrambled by the second RNTI to the second device.

The method according to claim 7, wherein the sending, by the joint transmission link, the retransmission request including the first device identifier to the second device, includes:

The method according to any one of claims 1 to 9, wherein the uplink authorization includes a time-frequency resource;

And receiving, by the second device, the uplink data sent by using the joint transmission link according to the retransmission request, including:

After receiving the uplink data of the first device by using the modulation and coding scheme in the retransmission request, the processed uplink data sent by using the time-frequency resource through the joint transmission link .

The method according to any one of claims 1 to 10, wherein the combined transmission establishment request further includes an uplink authorization used when the uplink data is jointly transmitted for the first time.

12. A macro base station, wherein the macro base station comprises: a determining module, configured to determine a first device that needs to perform uplink data transmission by using a joint transmission link, and a sending module, configured to send, to the second device, a joint transmission establishment request that includes the first device identifier determined by the determining module;

The sending module is further configured to send the uplink authorization of the first device to the first device, where the receiving module is further configured to receive an uplink sent by the first device according to an uplink grant sent by the sending module. Data

The sending module is further configured to: when the receiving module does not successfully receive the uplink data, send, by using the joint transmission link, a retransmission request including the first device identifier to the second device; The receiving module is further configured to receive uplink data that is sent by the second device according to the retransmission request sent by the sending module, and the uplink data sent by the second device is acquired by the second device. After the uplink authorization of the first device, the uplink data that is sent by the first device according to the uplink authorization is received according to the uplink authorization.

The macro base station according to claim 12, wherein the determining module comprises: a receiving unit, configured to receive a current channel quality indicator sent by the first device;

And a determining unit, configured to: when the current channel quality indicator received by the receiving unit is lower than the first threshold, determine that the first device is a first device that needs to perform uplink data transmission by using a joint transmission link.

The macro base station according to claim 12, wherein the determining module is further configured to determine whether the joint transmission link needs to be released;

The sending module is further configured to: when the determining module determines that the joint transmission link needs to be released, send a joint transmission release message including the first device identifier to the second device, so that the second device A joint transmission link with respect to the first device is released according to the joint transmission release message.

The macro base station according to claim 14, wherein the receiving unit is further configured to receive a current channel quality indicator sent by the first device;

The determining unit is further configured to: when the current channel quality indicator received by the receiving unit is higher than a second threshold, determine that the joint transmission link needs to be released.

The macro base station according to claim 14, wherein the determining module is further configured to: when the uplink data transmission of the first device is completed, determine that the joint transmission link needs to be released.

The macro base station according to claim 12, wherein the sending module is further configured to send, by using radio resource control signaling, a joint transmission establishment request including the first device identifier to the second device; or The joint transmission establishment request including the first device identifier is sent to the second device by scheduling signaling of the medium access control layer.

The macro base station according to any one of claims 12 to 17, wherein the joint transmission setup request sent by the sending module further includes a first radio network temporary identifier RNTI of the first device;

The sending module is further configured to send, to the first device, an uplink grant scrambled by the first RNTI.

The macro base station according to claim 18, wherein the joint transmission setup request sent by the sending module further includes a second RNTI corresponding to the first RNTI;

The sending module is further configured to use the second RNTI as the first device identifier, and send, by using the joint transmission link, a retransmission request that is scrambled by the second RNTI to the second device.

The macro base station according to claim 18, wherein the sending module is further configured to determine a third RNTI of the second device, and send the second RNTI to the second device by using the joint transmission link. A retransmission request including the first device identifier scrambled by the third RNTI.

The macro base station according to any one of claims 12 to 20, wherein the uplink grant sent by the sending module includes a time-frequency resource;

The sending module is further configured to send, by using the joint transmission link, a retransmission request with the first device identifier and a modulation and coding scheme to the second device;

The macro base station according to any one of claims 12 to 21, wherein the joint transmission setup request sent by the sending module further includes an uplink grant used when the uplink data is jointly transmitted for the first time.

A method for transmitting uplink data, the method comprising:

Establishing a joint transmission link with the macro base station with respect to the first device according to the joint transmission establishment request, and returning a joint transmission establishment acknowledgement message;

Acquiring an uplink grant sent by the macro base station to the first device, and acquiring uplink data sent by the first device to the macro base station according to the uplink grant;

The method according to claim 23, wherein the receiving, by the receiving macro base station, the joint transmission establishment request including the first device identifier, includes:

Receiving, by the macro base station, the joint transmission establishment request including the first device identifier sent by the radio resource control signaling; Alternatively, the receiving macro base station sends a joint transmission establishment request including the first device identifier by using the scheduling signaling of the medium access control layer.

The method according to claim 23, after the establishing, according to the joint transmission establishment request, the joint transmission link with the macro base station about the first device, the method further includes: receiving the macro base And sending, by the station, a joint transmission release message including the first device identifier, and releasing a joint transmission link about the first device according to the joint transmission release message.

The method according to any one of claims 23 to 25, wherein the joint transmission establishment request further includes a first radio network temporary identifier RNTI of the first device; The uplink authorization sent by the station to the first device includes:

The method according to claim 26, wherein the joint transmission establishment request further includes an uplink authorization used when jointly transmitting uplink data for the first time;

If the uplink grant sent by the macro base station to the first device is obtained for the first time, the uplink grant used when the uplink data is jointly transmitted by the first joint transmission request is obtained from the joint transmission setup request, and is used when the uplink data is jointly transmitted for the first time. The uplink grant is used as an uplink grant sent by the macro base station to the first device.

The method according to claim 23, wherein the obtained uplink grant includes a time-frequency resource, and the received retransmission request includes the first device identifier and a modulation and coding scheme;

And the sending the uplink data of the first device to the macro base station by using the joint transmission link according to the retransmission request, including:

And processing uplink data of the first device by using a modulation and coding scheme in the retransmission request, and transmitting, by using the time-frequency resource, the processed uplink data by using the joint transmission link.

29. A second device, wherein the second device comprises:

a receiving module, configured to receive a joint transmission setup request that includes a first device identifier sent by the macro base station, and an establishing module, configured to establish, with the macro base station, the first device according to the joint transmission setup request received by the receiving module Joint transmission link;

An acquiring module, configured to acquire an uplink grant sent by the macro base station to the first device, where the acquiring module is further configured to acquire, according to the obtained uplink grant, the uplink data sent by the first device to the macro base station ;

The second device according to claim 29, wherein the receiving module is further configured to receive a joint transmission establishment request that includes a first device identifier sent by the macro base station by using radio resource control signaling; or, receive The macro base station sends a joint transmission establishment request including the first device identifier by using the scheduling signaling of the medium access control layer.

The second device according to claim 29, wherein the receiving module is further configured to receive a joint transmission release message that is sent by the macro base station and includes the first device identifier;

The second device further includes:

And a release module, configured to release a joint transmission link about the first device according to the joint transmission release message received by the receiving module.

The second device according to any one of claims 29 to 31, wherein the joint transmission establishment request received by the receiving module further includes a first radio network temporary identifier RNTI of the first device. ;

The obtaining module is further configured to acquire, according to the first RNTI, an uplink grant sent by the macro base station to the first device.

The second device according to claim 32, wherein the joint transmission establishment request received by the receiving module further includes an uplink authorization used when the uplink data is jointly transmitted for the first time; When the uplink grant sent by the macro base station to the first device is obtained for the first time, the uplink grant used when first transmitting the uplink data is obtained from the joint transmission setup request, and is used when the uplink data is jointly transmitted for the first time. The uplink grant to the uplink grant is sent by the macro base station to the first device.

The second device according to claim 29, wherein the uplink grant obtained by the acquiring module includes a time-frequency resource, and the retransmission request received by the receiving module includes the first device identifier And modulation coding scheme;

The sending module is further configured to process uplink data of the first device by using a modulation and coding scheme in the retransmission request, and send the processed uplink by using the time-frequency resource through the joint transmission link. data.

35. An uplink data transmission system, where the system includes: a macro base station, a second device, and a first device;

The macro base station is the macro base station according to any one of claims 12 to 22; the second device is the second device according to any one of claims 29 to 34; The device is configured to send uplink data to the macro base station according to the uplink grant sent by the macro base station.