Method for vertical handoff between heterogeneous networks with dynamic probability of voice based on time threshold
An inter-network, voice technology, applied in wireless communication, electrical components, etc., to achieve performance advantages and improve the effect of priority UVH switching call loss rate
Inactive Publication Date: 2018-01-26
EAST CHINA NORMAL UNIV
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M. Salamah et al pointed out in the paper "A FairBandwidth Allocation Scheme for Multimedia Handoff Calls in CellularNetworks" published in the journal "New Trends in Computer Networks" in 2005: "For online voice calls, if the duration of the call is very short, the call will be dropped. , the user will be very annoyed, and when the call is dropped after a certain period of time, the user's dissatisfaction will not be so strong; similarly, for online data calls, when the connection time is less than an acceptable range, the user can generally be dropped Tolerant, but when the online data transmission has been going on for a considerable period of time and the connection drops, the user's dissatisfaction will be quite strong”
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[0026] The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments. The following examples do not limit the invention. Without departing from the spirit and scope of the inventive concept, changes and advantages that can be imagined by those skilled in the art are all included in the present invention.
[0027] figure 1 It shows the cellular mobile network / WLAN interworking system structure, which provides voice and broadband data services for cellular mobile terminals and wireless terminals in the WLAN coverage area. In the simulation of the embodiment, the channel capacity B of each cell is 20 BBUs (basic bandwidth unit), and the channel capacity of each WLAN coverage area is 54 BBUs. Channel threshold B set by cellular mobile channel u and B n Both are 20BBUs. In order to meet the service QoS requirements, a single voice call needs to occupy a channel of one basic bandwidth unit, while a single broadband data cal...
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The invention discloses a method for vertical handoff between heterogeneous networks with a dynamic probability of voice based on a time threshold. The method provides a dynamic probability DVH (Downward Vertical Handoff) decision algorithm for online voice calls within a dual coverage area on the basis of the vertical handoff method based on the time threshold, so that the degree of congestion ofchannels in the cellular coverage area is relieved. The method has the beneficial effects that the high cellular mobile channel utilization of a system is kept while the priority UVH call loss rate,the non-priority UVH call loss rate and the new cellular call block probability performance of the system are remarkably improved at the expense of very limited influence on part of quality of serviceof a non-sensitive voice user, and the channel resources are effectively utilized.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for voice dynamic probability vertical switching between heterogeneous networks based on a time threshold. Background technique [0002] At present, with the continuous growth of people's demand for mobile access services, the next-generation wireless communication technology is developing towards the direction of realizing heterogeneous wireless network intercommunication. Cellular mobile network and wireless local area network (WLAN) are two major wireless communication networks in modern wireless communication. The cellular mobile network is characterized by large coverage and low bandwidth. On the contrary, WLAN has the characteristics of small coverage and high bandwidth. The intercommunication between the cellular mobile network and WLAN can make the advantages of the two complement each other and enhance the service quality (QoS) of the provided se...
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IPC IPC(8): H04W24/02H04W36/00H04W36/14H04W36/16
Inventor 蔡家麟
Owner EAST CHINA NORMAL UNIV