Method and equipment for originating and detecting reverse access

Abstract

The invention improves capability for wireless terminal moved in high speed to reverse access channel. The method groups signature sequences. Different groups of signature sequences are utilized in different speed ranges. Using blocked mode, network side receives signed signature sequence groups in high speed so as to raise performance of reverse access channel. Different blocked modes are utilized to detect groups of signature sequences in different speed ranges. The blocked mode is not utilized for the signature sequence group in lowest speed; and the signature sequence group in higher speed utilizes smaller block. Using only one signature sequence group under one blocked mode carries out correlation detection. Partitioned blocks can be superposed each other. Shorter signature sequence can be selected for wireless terminal closer to base station; and longer signature sequence can be selected for wireless terminal farther to base station.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the reverse access technology in the wireless communication system. Background technique [0002] The cellular mobile communication system usually divides the service area into multiple cells, and each cell is provided with wireless coverage and services by the corresponding base station, so as to realize the provision of services in a large area, and has obtained the most extensive application in the existing wireless mobile communication system Applications. In a cellular mobile communication system, terminals are connected to base stations through wireless links, and each base station needs to communicate with a certain number of terminals at the same time. [0003] Terminals are randomly scattered within the coverage of each base station in the entire communication system. When the terminal needs to communicate with the base station, it needs to initiate a reverse acce...

AI Technical Summary

Problems solved by technology

[0010] In practical applications, there are the following problems: using the existing method to send the reverse access prefix, the access probability of the terminal moving at high speed cannot be guaranteed

[0011] The main reason for this situation is that for high-speed mobile terminals, such as terminals with a moving speed of 350km / h, the performance of non-correlation detection is greatly reduced due to too fast channel changes, and it is difficult for the base station to capture reverse access requests. Increase, using the existing method to send the reverse access prefix, even in the case of good channel quality, it is difficult for the base station to capture the reverse access prefix, so that the probability of terminal reverse access is greatly reduced

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