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A method and device for receiving long scrambling codes for time division duplex system trunking services

A technology of trunking service and receiving method, which is applied in the direction of transmission system, access restriction, broadcast service distribution, etc., can solve problems such as inter-cell interference of downlink trunking service, reduce complexity, overcome multi-cell interference, and improve service transmission performance and the effect of cell capacity

Active Publication Date: 2011-11-30
SHENZHEN ZTE TRUNKING TECH CORP
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Problems solved by technology

[0007] The problem to be solved by the present invention is to provide a method for receiving long scrambling codes for downlink trunking services in a time-division duplex communication system to solve the inter-cell interference problem of downlink trunking services in a wireless communication system. The present invention also provides device for implementing the method

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  • A method and device for receiving long scrambling codes for time division duplex system trunking services
  • A method and device for receiving long scrambling codes for time division duplex system trunking services
  • A method and device for receiving long scrambling codes for time division duplex system trunking services

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] The present invention is specifically described by taking the trunking communication in the TD-SCDMA communication system as an example.

[0031] Such as figure 1 As shown, it is a network structure diagram of the present invention. The user equipment in the figure is a user in this cell, and there are neighboring cells 1, ..., neighboring cells n, and there are multiple user groups in one cell. The data of different user groups can be distinguished by code division channels, and the service types of different user groups can be the same or different. In the TD-SCDMA system, for a specific frequency point and time slot, the base station sends data to a specific user group, each base station adopts broadcast transmission, and there are NUM 1 user groups, and the data that each user group needs to download is m=1,2...NUM 1 , after spreading the data...

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Abstract

The invention relates to a method for receiving a long scrambling code of a downstream cluster service in a time division duplex communication system, which comprises the steps as follows: a base station broadcasts and transmits system data information with the long scrambling code to a target user group in the cell; user equipment estimates channel impulse responses for training sequences in the cell and in the neighboring cells according to the received system data information to obtain the channel impulse responses corresponding to each cell; the power of the channel impulse responses of each cell is estimated to obtain the power of the channel impulse responses corresponding to each cell, and the power of the channel impulse responses is sorted to determine the cells with effective receptions; and the rake reception and interference elimination, demodulation and decoding process are carried out cell by cell to the cells with effective receptions so as to obtain expected user data. Based on the method, the invention also provides a receiver-transmitter unit for realizing the method. The invention effectively overcomes the multi-cell interference, so as to improve the transmission performance of the cluster mass-sending service and the cell capacity.

Description

technical field [0001] The invention relates to the field of wireless communication systems, in particular to a method for receiving long scrambling codes for downlink trunking services in a time division duplex communication system and a transceiver device. Background technique [0002] In the wireless communication system, the downlink trunking service is a kind of service transmitted in the form of broadcast, and can transmit data to multiple users at the same time. In the trunking 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] In the trunking service of the current time-division duplex communication system, the smart antenna technology is generally used at the base station. This technology is sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W48/10H04W48/16H04B1/7115
Inventor 邓亮史凡
Owner SHENZHEN ZTE TRUNKING TECH CORP
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