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Method for reducing same frequency interference of high speed downlink packet access (HSDPA) users

A co-channel interference and user technology, applied in the field of HSDPA, can solve the problems of increasing block error rate and decreasing throughput, and achieve the effect of reducing downlink co-channel interference, improving QoS experience, and improving system performance.

Active Publication Date: 2012-09-19
TD TECH COMM TECH LTD
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Problems solved by technology

Especially for the HSDPA users at the edge of the cell, due to the interference of the same-frequency users in the neighboring cells, the block error rate (BLER) rises sharply, and the throughput drops severely

Method used

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  • Method for reducing same frequency interference of high speed downlink packet access (HSDPA) users
  • Method for reducing same frequency interference of high speed downlink packet access (HSDPA) users
  • Method for reducing same frequency interference of high speed downlink packet access (HSDPA) users

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0029] The main idea of ​​the present invention is: if the radio network controller (RNC) can distribute the interfering HSDPA users on different carriers, or the base station (NodeB) staggers and schedules the interfering HSDPA users when scheduling, it can greatly reduce the Co-channel interference improves users' QoS experience.

[0030] The present invention proposes a method for reducing co-channel interference of HSDPA users. In this method, NodeB first informs RNC of the relevant information of the interfering HSDPA users, and then, the RNC switches the interfering HSDPA users to other carriers according to the situation, and transfers the interfering HSDPA users to other carriers. The relevant information of edge users that can be handed over is...

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Abstract

The invention provides a method for reducing same frequency interference of HSDPA users. Firstly, for each of interfered users at the edge of the community, a base station reports interfering users producing strong interference at the upstream to a wireless network controller; then, the wireless network controller switches the interfering users in the community and returns interfering users which are not switched or not successively switched to the base station; and finally, the base station performs random schedule to the interfering users and the interfered users returned by the wireless network controller. According to the method, the same frequency interference of HSDPA users can be reduced, and Quality of Service (QoS) feelings of edge users and system performances can be promoted.

Description

technical field [0001] The invention relates to HSDPA technology, in particular to a method for reducing co-channel interference of HSDPA users. Background technique [0002] In the TD-SCDMA system, co-channel interference has always been an urgent problem that affects user experience and system performance. For the HSDPA service, since it is transmitted with a fixed power and has no power control, the same-frequency interference problem is particularly prominent. Especially for the HSDPA users at the edge of the cell, due to the interference of the same-frequency users in the adjacent cells, the block error rate (BLER) increases sharply, and the throughput drops seriously. [0003] Therefore, an effective solution needs to be proposed to reduce the co-channel interference of HSDPA users in the TD-SCDMA system. Contents of the invention [0004] The invention provides a method for reducing the same-frequency interference of HSDPA users, so as to reduce the same-frequency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W24/10H04W72/12
Inventor 孙宪荣王亮欧阳明光
Owner TD TECH COMM TECH LTD
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