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Downlink switching method of mobile communication system

A mobile communication system and soft handover technology, applied in the field of downlink handover, can solve the problems of increased signaling interaction complexity, superior performance, and difficult implementation, so as to improve coverage probability and transmission rate, make full use of, and simplify The effect of signaling interaction

Inactive Publication Date: 2009-06-10
ZTE CORP
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Problems solved by technology

[0003] However, in the R5 version of WCDMA, the downlink HS-DPCH still uses the hard handover technology, and it is possible to use a faster hard handover technology such as: fast cell or sector selection, instead of using the superior performance Soft handover technology, the main reason is that HS-DPCH mainly bears IP-based services, and the process of disconnection and connection has little impact on service quality. At the same time, because the downlink adopts asynchronous HARQ The diversity gain of transmission compensates the traffic gain of soft handover to a certain extent, and the feedback retransmission in soft handover requires a harsh synchronization process between base stations, which directly increases the complexity of signaling interaction. In the current wireless network system Very difficult to achieve

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  • Downlink switching method of mobile communication system
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  • Downlink switching method of mobile communication system

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Embodiment Construction

[0075] As shown in Figure 3, the method of the present invention is mainly by the terminal of the mobile communication system using the downlink reference channel to measure the channel quality of the downlink time-frequency blocks of each same-frequency networking cell inside the base station and / or between the base stations, and assists Wireless networks are handed off within base stations and / or between base stations. Its core process includes: handover within the base station, handover between base stations, and a combination of multiple handovers that exist both within the base station and between base stations.

[0076] like Figure 3A The shown internal switching process of the base station includes the following steps:

[0077] The terminal uses the downlink reference channel to measure the channel quality of downlink time-frequency chunks (chunks) of each same-frequency networking cell inside the base station;

[0078] Compare the channel quality of the downlink tim...

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Abstract

This invention relates to a downlink switch method for a mobile communication system, in which, a terminal utilizes the channel quality result of a downlink time frequency block of same frequency multi-net local areas inside and / or among base stations of a down reference channel measurement base station to help radio networks to switch inside the base stations and / or among them, which fully combines the strongpoint of hard switch among base stations, selection of quick local areas and soft switch in the base stations.

Description

technical field [0001] The invention relates to a method for realizing downlink switching in a mobile communication system, in particular to a method for realizing downlink switching for a packet-optimized broadband wireless system. Background technique [0002] In order to ensure business continuity under mobile conditions in modern cellular mobile communication systems, handover technology is one of the traditional solutions to ensure communication quality when wireless terminals cross different cells. Common handover methods can be divided into hard handover and soft handover. Hard handover is widely used in GSM communication system, and soft handover has been applied in CDMA system. Soft handover is one of the core technologies of CDMA system, such as CDMA IS-95 system and WCDMA R99 system. Compared with hard handover, soft handover has obvious advantages, providing additional soft handover gain, expanding cell coverage, and reducing call drop rate, etc., while hard hand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04W36/08H04W36/18H04W36/30
Inventor 张峻峰
Owner ZTE CORP
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