Improved distributed channel detection and sequential access method

A distributed channel and channel technology, which is applied in the field of distributed channel detection and sequential access, and can solve problems such as external transmission influence and mutual interference.

CN104955093AActive Publication Date: 2015-09-30ALCATEL LUCENT SHANGHAI BELL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-09-30

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Abstract

The invention provides an improved distributed channel detection and sequential access method. According to the scheme, an external network is enabled to only perform limited times of operation of confirming the normalized total interference power value borne by the external network, and broadcasting is performed via an exclusive channel apart from the iteration process. In the channel detection process, each communication link only measures transmission quality of the local communication link without interaction information between all the communication links. Meanwhile, a new communication link autonomously infers the maximum achievable signal to interference plus noise ratio according to local link measurement information so that the new communication link determines accessing for performing transmission on the same channel with all other activated links at the same time.
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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...

Examples

Embodiment Construction

[0070] The present invention proposes an improved Distributed Channel Detection and Sequential Access (DSICO-SEA) scheme to expand the network by automatically stacking communication links in the same channel sequentially 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.

[0071] 1. Problem model

[0072] 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...