Method and system of forming physical frame for mobile communication system

Abstract

The invention relates to a method for forming physical frame in mobile communication system and relative system, wherein said method comprises: dividing voice signal into several data blocks; processing each data block with linear predict coding algorism to obtain one voice code data frame relative to the data block; coding the channel on said voice code data frame to obtain several channel code data bit groups, to be projected into one or several physical channels. The invention uses linear predict code algorism to code the voice signal, with low sensitivity on communication error rate and support on high-error / loss condition, to improve the communication quality. And it uses simple method to code the channel, to improve service quality.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a physical frame forming method and system for mobile communication. Background technique [0002] The personal portable telephone system (PHS system) is mainly used to solve the mobility problem of fixed telephone terminals within a limited range, especially suitable for use in areas with high user density and low mobility. Compared with the Global System for Mobile Communications (GSM) , IS-95 system and third-generation mobile communication system, PHS system has a lower communication threshold, so it has been developed on a large scale in Japan, China and the Asia-Pacific region. PHS technology has become the mainstream technology for the development of low-speed and small-scale mobile wireless local telephone systems in China. [0003] Because the PHS system does not use channel coding, interleaving, power control and other technologies on the air interface, and th...

AI Technical Summary

Problems solved by technology

[0003] Because the PHS system does not use channel coding, interleaving, power control and other technologies on the air interface, and the base station coverage is small, it leads to many problems such as a large number of base stations, many blind spots, complex overlapping areas of different base stations in the network, and poor mobility management. Therefore, in the complex wireless channel environment and the coverage area with severe interference, the voice quality of the PHS system often deteriorates and the system performance decreases

A typical example is that at the edge of a cell, the coverage signal from the base station is weak and the strong interference from neighboring base stations increases the transmission error probability at the edge of the cell and deteriorates the voice quality

In addition, compared with GSM or Code Division Multiple Access (CDMA) networks, the transmission power of the PHS system is relatively small, so in the process of network planning, it is easy to have insufficient coverage and over-coverage, which will also cause communication errors at the edge of the cell Increased probability

Images