Method for performing distributed channel detection and sequential access

A distributed channel and channel technology, applied in the field of distributed channel detection and sequential access, can solve the problem of detection power affecting applicability and other issues

Active Publication Date: 2014-12-31
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, how to set the size of the detection power and the time of the access control decision will affect its practical applicability
[0010] In summary, channel sounding for determining whether an arbitrarily chosen target SINR is achievable under power constraints remains an open problem

Method used

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  • Method for performing distributed channel detection and sequential access
  • Method for performing distributed channel detection and sequential access
  • Method for performing distributed channel detection and sequential access

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Embodiment Construction

[0066] The present invention proposes a distributed channel detection and sequential access (DSICO-SEA) scheme to expand the network by sequentially superimposing communication links in the same channel automatically to obtain high spatial multiplexing efficiency. The basic idea of ​​the present invention is to propose a distributed algorithm that uses only local measurement values ​​to determine the globally optimal maximum achievable SINR under power constraints. The following will describe in detail the problem of the global-based maximum achievable SINR under power constraints from the perspective of optimization, and how to derive the algorithm mathematically.

[0067] 1. Problem model

[0068] This problem model is suitable for the scenario of sequential access channel. Consider the following scenario: a common wireless channel (eg, a block of time-frequency resources) is shared by active wireless networks and external communication links. The activated wireless networ...

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Abstract

The invention provides a method for performing distributed channel detection and sequential access. According to the technical scheme of the method, a new transmitter is allowed to transmit detection signals at detection intervals with any constant power, and at the same time, each activated communications link iteratively updates the transmitting power of the transmitter with a predetermined mechanism, wherein the mechanism only depends on the ratio of target SINR of the communications link to local SINR and a power adjustment value correlated to normalized outward interference; an external network determines the normalized power value of interference which is borne by the external network, and performs broadcast through an exclusive channel in an iterative process; in a channel detection process, each communication link only measures the quality of local communication links, and information interaction is not required to be performed between the communication links; and a new communication link independently deduces the maximum achievable SINR of the new communication link according to local link measurement information to determine whether to access a channel so as to be transmitted together with all activated links simultaneously.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method for distributed channel detection and sequential access. Background technique [0002] A wireless network can be understood as a collection of effectively point-to-point communication links (a pair of transmitters and receivers) interacting with power control. This modeling method can be applied to most practical wireless systems with interference coupling, such as multi-layer cellular systems, dense cellular systems, cognitive wireless networks, ad hoc networks and MIMO transmission, and multiple wireless access Coexistence systems of technologies, such as wireless communication systems where WiFi and cellular systems coexist. Each of the multiple communication links corresponds to a single-hop transmission in the same channel, which not only interfere with each other, but also adversely affect external transmissions. In order to improve the degree of spatial multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W76/02H04B17/00
Inventor 郭海友
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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