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Group vertical handoff method in heterogeneous wireless environment and system thereof

A wireless environment, vertical handover technology, applied in the field of communication, can solve the problem of difficult to effectively improve the utilization of system resources, unable to meet system requirements and other problems

Inactive Publication Date: 2009-12-09
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Therefore, for the typical group vertical handover scenario where multiple vertical handoffs arrive at the same time, the existing vertical handover control scheme based on the first-come-first-served mechanism cannot meet the system requirements, and it is difficult to effectively improve the utilization of system resources

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  • Group vertical handoff method in heterogeneous wireless environment and system thereof
  • Group vertical handoff method in heterogeneous wireless environment and system thereof
  • Group vertical handoff method in heterogeneous wireless environment and system thereof

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Embodiment Construction

[0057] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0058] Such as figure 1 As shown, it is a schematic diagram of a typical group vertical handover scenario in a hotspot coverage area in a heterogeneous wireless environment in the present invention. In the hotspot coverage area, there are multiple wireless access networks (such as WiMAX, UMTS and WLAN shown in the figure). Since the users in the hotspot area are relatively concentrated, multiple handover requests may be caused by changes in user mobility and service requirements Arrive at the same time.

[0059] Without loss of generality, for the available networks in the current cell, establish a set of available access networks S = {1, 2, ..., k}, where k represents the serial number of the available network; for any network set S in the current cell A network i∈S, its network capacity is denoted as C i , the res...

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Abstract

The invention relates to a group vertical handoff method in heterogeneous wireless environment, comprising the following steps: terminal side equipment collects various upper layer information and bottom layer information of an access network which the terminal side equipment belongs to, calculates to obtain included angle and distance of user target vector and network capacity vector; whether preset threshold value conditions are met is judged, if not, handover requests are sent to an access device; the access device forwards the handover requests to a decision-making server; the decision-making server, based on loading conditions and service conditions of each access network, processes the handover requests in a collective way and returns obtained handover decision-making results to corresponding terminal side equipment through access devices of the access networks; the terminal side equipment executes handover operation according to the handover decision-making results. The invention also relates to a vertical handoff system in a heterogeneous wireless environment. Proceeding from the whole system, the invention makes full of network heterogeneity to improve overall performance of the system and effectively improves resources utilization rate of the system.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a group vertical handover method and system in a heterogeneous wireless environment. Background technique [0002] With the vigorous development of various wireless access technologies, heterogeneity will be an important feature of future wireless communication networks. Due to the development of digital signal processing technology, chip integration technology and radio frequency technology, having multi-network access capability has become an important trend in the future development of smart terminals. For network operators, how to rationally utilize network heterogeneity to optimize overall system performance and provide users with the best seamless service experience is a hot topic in current heterogeneous network research. [0003] Different from horizontal handover between cells in traditional cellular networks, intelligent terminals with multi-network access capab...

Claims

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Application Information

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IPC IPC(8): H04W36/14H04W36/22
Inventor 田辉张平孙雷胡铮沈东明王升东任佳智
Owner BEIJING UNIV OF POSTS & TELECOMM
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