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Enhanced method for 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 problems such as affecting the overall performance, increasing system overhead and signaling overhead, etc.

Active Publication Date: 2016-06-01
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

Considering that in the actual deployment of the coexistence system, the internal network and the external network may belong to different management entities, the communication between them is not easy to implement, and in the case of a large number of iterations, the measurement and broadcast operation The introduced overhead and signaling overhead may grow to the point where it significantly impacts the overall performance, so there is still a need for further enhancements to this method

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  • Enhanced method for distributed channel detection and sequential access
  • Enhanced method for distributed channel detection and sequential access
  • Enhanced method for distributed channel detection and sequential access

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Embodiment Construction

[0063]The present invention proposes an enhanced distributed channel detection and sequential access (DSICO-SEA) scheme to expand the network by automatically sequentially superimposing communication links in the same channel to obtain high spatial multiplexing efficiency . The basic idea of ​​the present invention is to propose a distributed algorithm, which only uses local measurement values ​​to determine the globally optimal maximum achievable SINR under the condition of 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.

[0064] 1. Problem model

[0065] 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. ...

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Abstract

The invention provides an enhanced method for distributed channel detection and sequential access. According to the technical scheme of the invention, an external network is only required to determine the operation of a normalized total interference power value within finite times, and broadcast by a dedicated channel beyond an iteration process. In a channel detection process, each communication link only measures the transmission quality of a local communication link, and the communication links do not need to exchange information. Meanwhile, a new communication link independently infers the maximum achievable signal to interference plus noise ratio according to the local link measurement information thereof and determines whether to access the same channel as all activated links for transmission or not.

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, adhoc networks and MIMO transmission, and multiple wireless access technologies Coexistence systems, 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 multiplex...

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Application Information

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IPC IPC(8): H04W24/08H04W74/00
Inventor 郭海友
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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