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Network reselection method between different systems, multi-mode terminal and system

A multi-mode terminal and network reselection technology, applied in electrical components, wireless communication, etc., can solve problems such as multi-mode terminals, inability to be called, and rate drop, so as to improve service quality, reduce off-network time, Guaranteed normal performance

Active Publication Date: 2017-11-21
CHINA MOBILE GROUP JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0042] Defect 1: When the multi-mode terminal performs inter-system reselection in the idle state or in the inter-system interoperability process initiated by the terminal after the end of the voice service, due to reselection from the TD-SCDMA network to the GSM / GPRS network, or from the GSM / When the GPRS network is reselected to the TD-SCDMA network, the multi-mode terminal must be disconnected from the network for 6-8 seconds
During the inter-system reselection process, the multimode terminal will not be able to make a normal call, nor can it serve as a called party.
[0043] Defect 2: When a multi-mode terminal performs data services on a TD-SCDMA network, when the multi-mode terminal moves to a weak TD network signal and a strong GSM network signal, the multi-mode terminal will reselect to the GSM network through inter-system reselection, and the service will be It will be interrupted for 6-8 seconds, and the speed will drop significantly at the same time
However, this technology cannot solve the problem that the multi-mode terminal is in an idle state or the multi-mode terminal is disconnected from the network during the reselection process. called question

Method used

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  • Network reselection method between different systems, multi-mode terminal and system
  • Network reselection method between different systems, multi-mode terminal and system
  • Network reselection method between different systems, multi-mode terminal and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] like figure 1 As shown, it is a schematic diagram of signaling for reselection handover in TD terminal idle mode of the present invention, including:

[0119] Step 101: A multi-mode terminal in idle mode resides in a GSM / GPRS cell. When it is detected that the inter-system reselection threshold (threshold 1) is met, the multi-mode terminal actively initiates a PS domain session service, and the multi-mode terminal uses MM (Mobile Management, mobility management) protocol establishes GPRS attachment to CN (Core Network, core network), and then uses SM (Session Management, session management) protocol to initiate PDP activation (ie Active PDPContextRequest), where the QoS attribute of the PDP context has strict time If the request is extended and the service type is a session service, the CN feeds back Active PDP Context Accept to the multimode terminal, indicating that the session service in the PS domain is established successfully. Go to step 102;

[0120] Step 102: ...

Embodiment 2

[0134] like figure 2 As shown, it is a schematic diagram of signaling for reselection switching under the TD terminal voice call end mode of the present invention, including:

[0135]Step 201: The multi-mode terminal makes a voice call in the TD-SCDMA network. When the transmission quality of the TD-SCDMA network declines, the RNC makes a judgment handover and executes the inter-system CS domain handover process;

[0136] Step 202: When the multimode terminal receives the Handover from UTRAN Command from the RNC, it starts switching from 3G to 2G;

[0137] Step 203: After the handover is completed, the multi-mode terminal sends a Handover Complete message to the MSC to declare the handover is successful, and after the handover is successful to GSM, the voice call continues to be maintained on the GSM network.

[0138] Step 204: After the core network MSC receives the Handover Complete message, it sends an IuReleaseCommand message to the 3G network RNC to realize the purpose...

Embodiment 3

[0159] like image 3 As shown, it is a schematic diagram of the signaling of PS direct switching in TD terminal idle mode of the present invention, including:

[0160] Step 301: A multi-mode terminal in idle mode resides in a GSM / GPRS cell. When it is detected that the inter-system reselection threshold (threshold 1) is met, the multi-mode terminal actively initiates a PS domain session service, and the terminal uses MM (Mobile Management, Mobility Management) protocol establishes GPRS attachment to CN (Core Network, core network), and then uses SM (Session Management, session management) protocol to initiate PDP activation (i.e. Active PDP ContextRequest), where the QoS attribute of the PDP context has strict delay requirements, The service type is a session service, and the CN feeds back the terminal Active PDPContextAccept, indicating that the session service in the PS domain is established successfully. Go to step 302;

[0161] Step 302: After the multimode terminal esta...

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Abstract

The invention discloses a network reselection method between different systems, a multi-mode terminal and a system, wherein the method includes: when a multi-mode terminal residing in a 2G network intends to reselect to a 3G network when the 2G voice service is terminated, multiple The modem terminal initiates a PS domain session service request; after the multi-mode terminal establishes a connection on the 2G network, it obtains the adjacent 3G network information by reading the system information issued by the BSC of the 2G network; the BSC of the 2G network receives the 3G network information reported by the multi-mode terminal. After the network measurement report, the PS direct switching process from the 2G network to the 3G network is initiated; the multi-mode terminal switches from the 2G network to the 3G network according to the adjacent 3G network information, updates the location area and routing area, and releases the PS domain session service. The invention reduces the off-network time of the multi-mode terminal when it reselects to the TD network, and further ensures the normal progress of the call and data services of the multi-mode terminal in the switching reselection process from the 2G network to the TD network.

Description

technical field [0001] The present invention relates to the field of core network technology in the communication field, and in particular, relates to a network reselection method among different systems, a multi-mode terminal and a system. Background technique [0002] At present, the technical solutions for the interoperability of multi-mode terminals (the present invention generally refers to terminals supporting GSM and TD-SCDMA dual-mode) under the GSM and TD-SCDMA networks include: [0003] 1. The interoperability scheme between GSM network and TD-SCDMA (hereinafter referred to as TD) network in the existing network includes: [0004] (1) In the idle state, the multi-mode terminal realizes the conversion between the GSM network and the TD-SCDMA network through reselection, and the multi-mode terminal will be disconnected from the network during the conversion process of different systems, and cannot realize calling and calling; [0005] (2) For voice services, multimo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14H04W36/30H04W88/06
Inventor 王清卞国东李飞杜长浩乔勇戴宸光
Owner CHINA MOBILE GROUP JIANGSU