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Delay-controllable combined wireless resource scheduling method

A wireless resource scheduling and time delay technology, applied in wireless communication, electrical components, etc., can solve problems such as unclear market, slow research and development process, and unclear integration goals, so as to meet the needs of time delay, guarantee Qos requirements, increase The effect of using efficiency

Inactive Publication Date: 2012-11-14
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unclear fusion goal of existing algorithms and models, this sub-layer technology cannot be effectively realized for a long time
And for the integration plan of a certain technology, the research and development process is slow due to the unclear market
[0006] Due to the large number of users on the train and various concurrent services, it is difficult to ensure the fairness of services for all users even with wireless repeaters, especially the access delay of high-priority services.
The 802 / 11e protocol adds a guarantee mechanism for service Qos, which can classify and transmit services at the Mac layer, but its service type does not correspond to the QCI in the TD-LTE system, and the TD system cannot guarantee the Qos performance of WLAN services

Method used

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  • Delay-controllable combined wireless resource scheduling method
  • Delay-controllable combined wireless resource scheduling method
  • Delay-controllable combined wireless resource scheduling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a joint radio resource scheduling method with controllable delay, such as figure 1 shown, including the following steps:

[0045] 1. Use an additional clock register to regularly read the TD-LTE system clock, and notify the WLAN network through the clock register, so that the WLAN network and the TD-LTE network can be synchronized.

[0046] TD-LTE is a time-division duplex LTE technology. All wireless channels correspond to unique resources in the time domain, while WLAN uses carrier sense multiple access / collision avoidance CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) , is a preemptive half-duplex media access control protocol, and is essentially a TDD-based duplex mode.

[0047] In IEEE 802.11, a timing synchronization function TSF (Timing Synchronization Function, Timing Synchronization Function) is proposed to realize the timing synchronization method of Ad hoc (point-to-point) network. Scalability of hoc network. Some...

Embodiment 2

[0061] The applicable scenario considered by the present invention is in the concentrated areas of remote areas or in the carriages of high-speed railways in the future. Since optical cables cannot be laid, the wireless relay method can more conveniently realize user networking. The following uses high-speed railways as an example to consider the heterogeneous The network type is 802.11e and TD-LTE.

[0062]When users surf the Internet, a large amount of data services will be generated, and the types of services generated are also various. According to the 802.11e protocol, there are 4 types of service levels, which are 2 types of background services, 1 type of video services and 1 type of voice services; the corresponding Qos levels increase from 0 to 3 in turn. It can be seen from relevant literature and test reports that when the number of users exceeds 20, the collision probability will be greatly increased, and the average delay caused by collisions can reach more than 20...

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Abstract

The invention discloses a delay-controllable combined wireless resource scheduling method. The method comprises steps of reading a system clock of a time-vision long-term evolution (TD-LTE) network regularly by using an extra clock register and enabling, notifying a wireless local area network (WLAN) regularly through the clock register and maintaining synchronization of the WLAN and the TD-LTE network; distinguishing an uplink direction and a downlink direction of a business on a media access control (MAC) layer of the WLAN, arranging an uplink contention window and a downlink contention window and matching window sizes in accordance with uplink time and downlink time of the TD-LTE network; aiming at business demands generated from the WLAN to design a combined virtual mapping mechanism and enabling the TD-LTE to distribute WLAN data rapidly to a suitable carrier for transmission; and designing a channel matching rule based on delay and guaranteeing a delay sensitive business. By the aid of the method, high priority businesses can access in real time, requirements of quality of service (Qos) of real-time businesses are guaranteed, a lot of delay generated during transmission of data businesses in a heterogeneous system is reduced, and requirements of different Qos businesses for delay are met.

Description

technical field [0001] The invention belongs to the technical field of mobile broadband wireless communication, and relates to a joint wireless resource scheduling method with controllable time delay. Background technique [0002] The future direction of wireless mobile communication development will be that various wireless access technologies and standard interconnections complement each other, providing users with ubiquitous and ubiquitous information and communication services. The topology structure of the next generation mobile communication network will gradually evolve into a multi-level, overlapping three-dimensional network structure. Different types of access networks exist in the same space, and they have their own characteristics and suitable application occasions, such as TD-LTE technology for long-distance access and WLAN technology for short-distance access. For users in remote rural areas, mountainous areas and large-scale sports areas, due to the inability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W72/12H04W74/08H04W72/54
Inventor 高智伟单联海欧阳玉玲胡宏林杨旸钱骅
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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