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Measurement shifting method from WCDMA system to GSM system

A GSM system and dynamic measurement technology, applied in the field of wireless communication, can solve the problems of return measurement control failure, dropped calls, and indistinguishable GSM cell types, so as to reduce adverse effects, save system overhead, and avoid measurement failures.

Inactive Publication Date: 2009-02-04
ZTE CORP
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The existing WCDMA system to GSM system measurement handover method has the following problems: 1. Since the UE may find cells that can be handed over without starting the compressed mode measurement, it is not necessary to start the compressed mode measurement for these cells. The technology does not distinguish GSM cell types during measurement, resulting in unnecessary system overhead
2. UE may return measurement control failure, resulting in subsequent call drop
The reason is that among the two GSM neighbors of GSM900 and DCS1800, there may be only one type of neighbor that needs compressed mode to perform inter-system measurement, while in the prior art, compressed mode measurement is performed as long as there is one GSM neighbor that needs compressed mode measurement , causing GSM neighboring cells that do not need to perform compressed mode measurement to also use compressed mode for measurement, such a contradiction makes UE may return measurement control failure
3. Turning on the compression mode will have a certain impact on the user's service quality, physical layer interleaving, rate matching, and power control processing. The processing of the existing technology may bring unnecessary adverse effects on the system

Method used

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  • Measurement shifting method from WCDMA system to GSM system
  • Measurement shifting method from WCDMA system to GSM system
  • Measurement shifting method from WCDMA system to GSM system

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specific Embodiment approach 1

[0034]Embodiment 1: The measurement switching method of the present invention is different according to the GSM frequency band, and the GSM cell adjacent to the 3G cell is divided into the GSM system cell of the first frequency band and the GSM system cell of the second frequency band according to the measurement of the GSM frequency band by the UE. System cell, you can set the first frequency band as GSM900 and the second frequency band as DCS1800, or set the first frequency band as DCS1800 and the second frequency band as GSM900; you can also set the first frequency band as GSM900 and the second frequency band as PCS1900, or set The frequency band is PCS1900, and the second frequency band is GSM900.

[0035] Such as figure 2 As shown, the process in this diagram includes the following steps:

[0036] 1. Divide the GSM system cell into the first frequency band GSM system cell and the second frequency band GSM system cell according to the measurement capability of the UE, an...

specific Embodiment approach 2

[0044] Specific implementation mode two: as image 3 As shown, the flow process of this embodiment is as follows:

[0045] Step 201, the UE initiates a service in the 3G cell. After the service is established, the SRNC sends the inter-frequency measurement control threshold to the UE. The measurement control threshold is used for the user equipment to judge whether it needs to report to the SRNC to request measurement initiation. The initial measurement control threshold is set as first threshold D1;

[0046] Step 202, judging whether the quality deterioration of the WCDMA carrier frequency used by the UE reported by itself reaches or is lower than the first threshold D1, if not reported, the SRNC does not process, and repeats this step;

[0047] Step 203, if the UE reports to the SRNC that the carrier frequency reaches or is lower than the first threshold D1, the SRNC sends the inter-system measurement control to the UE, the measurement adopts the uncompressed mode, and the ...

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Abstract

The invention discloses a measuring switch method of a WCDMA system and a GSM system, which divides the GSM system cell into a first frequency band GSM system cell and a second frequency band GSM system cell, a first threshold and a second threshold for measuring and controlling are provided; user equipment dynamically detects the self-used WCDMA carrier frequency quality, and selects following three operation according to the detecting result of the carrier frequency quality and the first threshold as well as the second threshold: 1) continuing the detection without processing; 2) measuring dynamically the first frequency band GSM system cell and judging whether to switch, and then switching into the first frequency band GSM system cell according to the measuring result to complete the switch; 3) measuring dynamically the second frequency band GSM system cell and judging whether to switch, and then switching into the second frequency band GSM system cell according to the measuring result to complete the switch. The method of the invention can not only save needless system load, but also avoid the measuring failure.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a measurement switching method from a WCDMA (Wideband Code Division Multiple Access) system to a GSM (Global System For Mobile Communications) system. Background technique [0002] The WCDMA system is a kind of the third generation mobile communication system (3G). In the area where the cells of this system and the cells of the GSM system are adjacent to each other, in order to realize the smooth transition of user services, the inter-system handover between WCDMA and GSM is introduced. . Specifically, after a user initiates a service in a 3G cell, the user gradually moves away from the 3G cell and approaches the GSM cell. In this case, a handover to the GSM system needs to be performed, otherwise the user may drop calls. In many cases, there are multiple GSM neighbors in a 3G cell. Before the CS (Circuit Service) or PS (Packet Service) of the WCDMA system is switched to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/34H04Q7/38
Inventor 陈新荣周烜
Owner ZTE CORP
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