Method for ensuring reliability of 802.16MAC layer supporting service differentiation

Abstract

The invention provides a method for ensuring the reliability of an 802.16MAC layer supporting service differentiation in a demanding protection way, relating to the field of communication. The invention adopts the technical proposal as follows: the service type is determined as a real time service or a non-real time service according to a connection identifier; three-time handshake process stipulated by IEEE802.16 protocol is executed to the tolerable real time service with time delay t less than time delay t ACK caused by data validation; and improved three-way handshake process is executed to the tolerable real time service or non-real time service with the time delay t more than the time delay t ACK caused by data validation, and received data is validated. The method can conduct data validation according to the service type, thus ensuring the reliability of data, reducing the error rate, improving the network throughput, and promoting the development and application of wireless Mesh network technology.

Description

technical field [0001] The invention relates to the communication field, in particular to the 802.16 MAC layer working mode. Background technique [0002] With the rapid development of wireless Internet in the world, as well as the increase of network service types and the growth of users' demand for bandwidth, broadband wireless access technology has become the focus of attention and has become the mainstream of the communication industry. The MAC layer of IEEE 802.16 supports two network topologies: traditional point-to-multipoint (PMP) mode and mesh (Mesh) mode. [0003] The PMP mode is the main form of wireless access. In the downlink, Time Division Broadcasting (TDM) is used for data transmission, while in the uplink, DAMA is combined with TDMA or OFDM. The PMP mode is similar to the current cellular communication system such as the GSM system and the third generation mobile communication system. It adopts a centralized control mechanism, and each base station (BS) is ...

AI Technical Summary

Problems solved by technology

Existing research based on Mesh mode mainly focuses on modulation and demodulation, channel coding, channel allocation, mobility management, etc. There is no related research on reliability assurance, such as literature: IEEEStd.802.16-2004, IEEE Standard for Local and Metropolitan AreaNetworks Part 16: Air Interface for Fixed Broadband Wireless AccessSystems.2004 disclosed a broadband wireless access technology based on IEEE 802.16. According to the standard specification of IEEE802.16, a three-way handshake process is performed to establish a connection. During the three-way handshake process, no consideration is given The impact of service type on connection establishment, the reliability of communication is not high, aiming at the above problems, an IEEE802.16MAC layer reliability guarantee method that supports service differentiation

Images