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Transmitting and receiving method and apparatus for group sending service in radio communication system

A technology of a wireless communication system and a receiving method, which is applied in the field of transmitting and receiving methods and devices for group sending services, can solve problems such as inter-cell interference and inter-user interference, and achieve the effects of reducing complexity, improving transmission performance and cell capacity

Inactive Publication Date: 2011-09-21
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method and device for transmitting and receiving group sending services in a wireless communication system, so as to solve the problems of inter-user interference and inter-cell interference in group sending services in a wireless communication system

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  • Transmitting and receiving method and apparatus for group sending service in radio communication system
  • Transmitting and receiving method and apparatus for group sending service in radio communication system
  • Transmitting and receiving method and apparatus for group sending service in radio communication system

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Embodiment Construction

[0036] The present invention provides a method for transmitting and receiving group sending services, such as Figure 4 shown, including:

[0037] In step 401, the base station broadcasts data to a target user group in the cell, and the user group consists of multiple UEs. There are multiple user groups in a cell, and the data between user groups is distinguished by code division channels, and the service types of different user groups can be the same or different;

[0038] Step 402, each cell configures a training sequence, and the base station transmits using the same training sequence for each user group in the cell;

[0039] Step 403, receiving the user equipment to detect the system information of the local cell and the neighboring cell, and obtaining the training sequence, spreading code and scrambling code information of the local cell and the neighboring cell at the same time, and performing channel impulse response estimation on the received training sequence signal ...

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Abstract

The invention relates to a sending and receiving method of a group sending service in a wireless communication system, the method includes the steps: step 1, a base station sends data to target user groups in a local cell by broadcasting and the target user group comprises at least one user equipment; step 2, each local cell is provided with a training sequence and the base station adopts the same training sequence to send data to the user groups in the local cell; step 3, the user equipment obtains channel impulse response corresponding to each cell according to the information of each cell; step 4, the user equipment carries out power evaluation on the channel impulse response of each cell; a code division channel is selected according to the result of power evaluation and threshold requirement, spread spectrum codes and disturbing codes corresponding to the selected code division channel as well as the corresponding channel impulse response form a system matrix; step 5, the user equipment conducts a joint detection on the system matrix to obtain expected data of a target user equipment. The sending and receiving method of the invention can effectively control the disturbance among users as well as among cells in group sending service.

Description

technical field [0001] The present invention relates to a communication system, in particular to a method and device for transmitting and receiving group sending services in a wireless communication system. Background technique [0002] In the wireless communication system, the downlink group sending service is a kind of service transmitted in the form of broadcast, which can transmit data to multiple users at the same time. In the group transmission service, due to the lack of uplink feedback information, the base station cannot accurately obtain the channel information of each user, so the usual closed-loop methods such as power control cannot be implemented, and the downlink broadcast is usually transmitted at a constant power within a certain period of time. [0003] There are two types of methods in the current group transmission service of the time division duplex communication system: one is not to use the smart antenna technology at the base station, this method is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7105H04L25/02H04W4/06
Inventor 邓亮史凡
Owner ZTE CORP
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