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Method and device for clearing p2p interference in support p2p mode communication system

A communication interference and signal technology, applied in wireless communication, selection device, multiplexing communication, etc., can solve problems such as P2P application limitations and inability to meet actual needs.

Inactive Publication Date: 2005-05-18
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, such as in hot spots (hot spots), the above-mentioned intelligent dynamic channel allocation method may not meet actual needs, especially when the P2P wireless range expands, the adoption of the above-mentioned intelligent dynamic channel allocation method may also make P2P The application is subject to certain restrictions

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  • Method and device for clearing p2p interference in support p2p mode communication system
  • Method and device for clearing p2p interference in support p2p mode communication system
  • Method and device for clearing p2p interference in support p2p mode communication system

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Embodiment Construction

[0026] The method for eliminating P2P interference of the present invention uses the unused scrambling code (Scrambling Code) of the cell where the P2P user terminal resides and its adjacent cells to scramble the P2P signal to be sent, so as to pass the good scrambling code The auto-correlation and cross-correlation features can eliminate the interference signal caused by the introduction of P2P communication.

[0027] In the following, the TD-SCDMA system will be taken as an example to briefly introduce the scrambling codes used in the present invention and their autocorrelation and cross-correlation characteristics.

[0028] The scrambling code is a group of fixed-length digital sequences (such as the 16-length scrambling code sequence used in the TD-SCDMA system). Scrambling the data is to perform chip-by-chip multiplication between the scrambling code sequence and the spread-spectrum-processed data after the data symbols are subjected to spread-spectrum processing. Differ...

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Abstract

A method for eliminating p2p communication interference by a network system including: determining the redundant block information according to the block used information of the local and its adjacent areas stationed by two user ends being set up point to point chain, detecting the relative positions between the two user ends and the activated users at communication state in the stationed and adjacent areas if wireless interference is generated between one of the end users and an activated user terminal, then further determination is made to see if said end and the activated user end are distributed in a same time slot, if so, on scrambling code is selected to two user ends from said redundant block information to carry out scrampling process to the P2P signal transferred between said two users.

Description

technical field [0001] The present invention relates to a communication method and device used in a TDD CDMA (Time Division Duplex Code Division Multiple Access) communication system, in particular to a method and device for eliminating P2P interference in a communication system supporting P2P mode. technical background [0002] In a conventional cellular mobile communication system, regardless of the distance between two communicating user terminals, a user terminal must be relayed by a base station to communicate with another user terminal. Figure 1 shows this conventional communication mode, user terminals UE1 and UE2 exchange information through the universal mobile communication system terrestrial radio access network (UTRAN) composed of base transceiver station (Node B) and radio network controller (RNC) , this communication mode is also called uplink-base station-downlink (UP-UTRAN-DOWN) mode. But in some cases, when two users located in the same cell are very close,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04W36/14H04W36/18H04W72/54
CPCH04W36/14H04W36/18H04W64/006H04W72/02H04W72/0466H04W92/18H04W72/541
Inventor 孙礼贾群力张学军
Owner KONINK PHILIPS ELECTRONICS NV