Cross-layer structure for guaranteeing QoS in WiMAX and QoS combination control method

Abstract

The invention discloses a layer-crossing structure for assuring the QoS in the WiMAX and a compound control method of the QoS. The layer-crossing design is used to divide the basic data control plane into two planes of QoS resource management and data service delivery. The QoS resource managing plane delivers the multiple media communication service flow by applying the layer to the MAC layer; controlling the PHY layer be gathered by the AMC channel mode selection information to the MAC layer transmission, security system to achieve cross-layer QoS control of the joint management of data services and access to the QoS flow control performance indicators set by the user in the system the threshold value; data streaming services to submit sub-plane containing a variety of norms to follow IEEE 802.16 data services stream processing module, the management of their resources in accordance with sub-QoS management plane carries control signaling information data services for all types of flow classification and scheduling to achieve layer by layer submitted. The present invention system in maintaining a high throughput at the same time being able to service a number of QoS flow limit indicators within the target threshold, taking into account a fair rate of customers.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a wireless network cross-layer architecture of a point-to-multipoint PMP global microwave access interoperable WiMAX network and a joint QoS control method thereof. Background technique [0002] WiMAX based on the IEEE 802.16 standard is a new broadband wireless access technology suitable for WMAN, which is expected to replace cable modem or digital subscriber line, and provide "last mile" for many users in non-line-of-sight environments. "Wireless broadband access. figure 1 A typical PMP WiMAX network topology is given. Each subscriber station SS expects that the services provided by the base station BS are not limited to simple data communication, but also include various multimedia communications, such as video conferencing, streaming media download, etc. How to increase capacity Providing high-speed and high-quality multimedia communication services for many users in a t...

AI Technical Summary

Problems solved by technology

[0004] 1. For the high layer including the network layer, transport layer and application layer, it can support different types of QoS service flows, and is responsible for setting the end-to-end link. If the wireless network layered design is adopted, it includes the physical layer and data link It is difficult for the lower layer of the layer to obtain the QoS requirements from the upper layer, such as delay and throughput, so it is impossible to adjust the resource allocation strategy in time

[0005] 2. For the lower layer, it is possible to detect the dynamic characteristics of the wireless channel. The wireless channel has characteristics such as limited capacity, high bit error rate, and channel quality changing with time and frequency. Especially when the wireless channel experiences deep fading, even if the system If a large bandwidth is allocated for a certain service connection, its performance may not meet the pre-specified QoS requirements. If the traditional wireless network layered design is adopted, it is difficult for the upper layer to obtain these features, so it is impossible to adjust the call admission control strategy in time

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