A wireless communication method, system and base station

A wireless communication and base station technology, applied in the field of systems, base stations, and device-to-device wireless communication methods, can solve the problems that the scheduling and transmission methods cannot follow the traditional cellular communication methods, and no effective solutions have been proposed.

Active Publication Date: 2018-03-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For D2D communication, business data is directly transmitted between UEs, so its scheduling and transmission methods cannot follow traditional cellular communication methods
For example, for the scheduling and transmission of D2D communication in the LTE (Long Term Evolution, Long Term Evolution) / LTE-A (LTE-Advanced, Advanced Long Term Evolution) system, no effective solution has been proposed yet.

Method used

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  • A wireless communication method, system and base station
  • A wireless communication method, system and base station
  • A wireless communication method, system and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In this embodiment, the base station transmits authorization information 1 to UE1 in subframe n1, and UE1 transmits service data 1 in subframe n1+k1 according to the indication of authorization information 1; and, the base station transmits authorization information in subframe n1+m1 2 to UE2, and UE2 receives the service data 1 in subframe n1+k1 according to the indication of the authorization information 2. Moreover, the subframe n1+k1 is a downlink subframe.

[0076] For k1, its value needs to meet the preparation time of the UE when transmitting data, that is, after UE1 receives the authorization information 1 in subframe n1, it needs to complete the data transmitter preparation before sending data in subframe n1+k1, for example Channel coding, constellation modulation, resource mapping, etc. Preferably, the value of k1 can refer to the scheduling sequence of the uplink service of the LTE / LTE-A system. That is, in the FDD system, the value of k1 is preferably 4; i...

Embodiment 2

[0080] In this embodiment, the base station transmits authorization information 1 in subframe n1, UE1 transmits service data 1 in subframe n1+k1 according to the indication of authorization information 1; and the base station transmits authorization information 2 in subframe n1+m1, UE2 receives the service data 1 in subframe n1+k1 according to the indication of the grant information 2. Moreover, the subframe n1+k1 is an uplink subframe.

[0081]For k1, its value needs to meet the preparation time of UE when transmitting data, that is, after UE1 receives the authorization information 1 in subframe n1, it needs to complete the data transmitter preparation before sending data in subframe n1+k1, for example Channel coding, constellation modulation, resource mapping, etc. Preferably, the value of k1 is the same as the scheduling timing of the uplink service of the LTE / LTE-A system, that is, in the FDD system, the value of k1 is preferably 4; in the TDD system, the value of k1 is p...

Embodiment 3

[0085] This embodiment describes the transmission method of the service data 2 in the present invention, specifically, the base station transmits the authorization information 3 in the subframe n2, and the UE2 transmits the service data 2 in the subframe n2+k2 according to the indication of the authorization information 3; And, the base station transmits the authorization information 4 in the subframe n2+m2, and the UE1 receives the service data 2 in the subframe n2+k2 according to the indication of the authorization information 4.

[0086] In this embodiment, the transmission method and timing relationship of the authorization information 1 and the authorization information 2 in Embodiment 1 and Embodiment 2 can be adopted for the transmission of the authorization information 3 and the authorization information 4, and will not be repeated here.

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Abstract

The present invention provides a wireless communication method, comprising: a base station transmits first authorization information to a first user equipment in subframe n1, and the first user equipment transmits first service data in subframe n1+k1 according to an indication of the first authorization information; The base station transmits the second grant information to the second user equipment in the subframe n1+m1, and the second user equipment receives the first service data in the subframe n1+k1 according to the indication of the second grant information. The invention also provides a base station and a wireless communication system. The present invention realizes D2D communication.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a device-to-device (Device-to-Device, D2D for short) wireless communication method, system and base station in a cellular system. Background technique [0002] Because the cellular communication system realizes the multiplexing of limited spectrum resources, the wireless communication technology has been developed vigorously. In a cellular system, when there is a service to be transmitted between two user equipments (UE1), the service data from user equipment 1 (UE1) to user equipment 2 (UE2) will first be transmitted to base station 1 through the air interface, Base station 1 transmits the user data to base station 2 through the core network, and base station 2 then transmits the above service data to UE2 through the air interface. The service data from UE2 to UE1 adopts a similar processing flow. If UE1 and UE2 are located in the same cell, base station 1 and bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
Inventor 吴栓栓戴博梁枫李儒岳袁弋非毕峰袁明杨瑾
Owner ZTE CORP
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