An access method

Abstract

The invention discloses an access method, which includes: an access network AN receives Access Probe information sent by an access terminal AT, returns Access Grant information to the AT, and allocates to MACID set to the AT; when the AT sends connection establishment request to the AN by a reverse business channel, select a MACID from the MACID set allocated by the AN at random as scramble on reverse business channel. The method provided by the invention can reduce interference on the reverse business channel caused by a plurality of AT access collision.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to an access method. Background technique [0002] Air interface evolution (Air interface evolution, AIE) is a wireless access technology proposed by the third generation mobile communication cooperation project organization 2 (3GPP2). (Evolution-Data Only, EV-DO) technology, the goal is to increase the peak rate and maintain backward compatibility; the second stage introduces more advanced technologies, such as Orthogonal Frequency Division Multiplexing (OFDM) technology, which can greatly improve Improving the spectrum efficiency and peak rate of the wireless access system is a long-term evolution plan of the 3GPP2 standard. [0003] In the Loosely Backward Compatible (LBC) mode of the AIE second-stage technology, the forward and reverse data multiplexing adopts the access scheme (OFDMA) based on the orthogonal frequency division multiplexing technology, and the data t...

AI Technical Summary

Problems solved by technology

[0012] It can be seen from the above description that the content of the access probe sent by the AT is randomly selected from several orthogonal codes. If a collision occurs and multiple ATs simultaneously select the same orthogonal code as the content of the access probe, then , due to the inherent characteristics of the OFDM system, the signals of these multiple ATs will be superimposed naturally at the receiving end, so that the AN will mistakenly think that this is an access probe sent by an AT, and only allocate one MACID and one reverse traffic channel, so After receiving the allocated MACID and reverse traffic channel, the multiple ATs will use the same scrambling code to send their respective connection establishment requests on the same reverse traffic channel, which will inevitably cause the signals of multiple ATs to Severe interference with each other on the traffic channel, affecting demodulation performance

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