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Transfer of algorithm parameters during handover of mobile station between radio network subsystems

A wireless network and subsystem technology, which is applied in the field of transmission of algorithm parameters during the handover of mobile stations between wireless network subsystems, to achieve the effect of saving resources

Inactive Publication Date: 2005-08-03
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2) Signaling messaging does not use user plane protocol, because signaling messaging has a separate protocol, so the difference between user plane and control plane is clearer than in GPRS
[0037] Another problem is that UMTS also has real-time packet connections

Method used

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  • Transfer of algorithm parameters during handover of mobile station between radio network subsystems
  • Transfer of algorithm parameters during handover of mobile station between radio network subsystems
  • Transfer of algorithm parameters during handover of mobile station between radio network subsystems

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0084] Figure 3 shows an example of negotiation of Header Compression (HC) parameters. When the mobile station utilizes the UE CAPAPBILITY INFORMATION (UE capability information) message to connect to the network RRC, and inform the SRNC about the header compression (HC) method and its parameters that the UE can use. This information is left to the network to update and take care of.

[0085] After comparing the network's own and these reception parameters, the network makes a decision on the HC method to use, taking into account the QoS requirements. It is thus possible to select the most likely HC method (in other words, the method of the first configuration may be selected as the real-time traffic optimization method or not, depending on the QoS requirements). After the network has made its decision to configure its own compressor, the algorithm of the compressor in the UE side is configured using RRC messages RADIO BEARER SETUP (Fig. 4) or RADIO BEARER RECONFIGURATION (Ra...

example 2

[0090] In addition, when the mobile station connects to the network RRC with the UE CAPAPBILITY INFORMATION (UE capability information) message of Fig. 3, it informs the SRNC_RNC about the required Header Compression (HC) method and related parameters that the UE can use. This information is left to the network to update and take care of.

[0091] The network selects the supported methods according to the methods supported by itself and the methods supported by the UE. Afterwards, the network can simultaneously send the parameters of all supported methods to the UE in a message. This means that both the network and the UE know which methods can be supported. In this case, OPT tables representing different packet types of different methods are also generated similarly at both ends. This information transfer can be performed by using RRC's message RADIO BEARERSETUP (radio bearer setup) as shown in FIG. 4 or RADIO BEARER RECONFIGURATION (radio bearer reconfiguration) as shown i...

example 3

[0096] It is also possible that the network informs the UE about the methods it supports when connecting to the network and in case of SRNS relocation after the SRNC_relocation_Commit message. In this case UE starts sending compressor parameters with some signaling based on RADIO BEARER SETUP (Fig. 4) and RADIO BEARER RECONFIGURATION (Radio Bearer Reconfiguration) (Fig. 5) and follows example 1 or 2 The compressor generation process is started, the difference is that the UE sends configuration messages and the network receives these messages.

[0097] The current (prior art) solution in GPRS is to renegotiate the XID when the location of the SGSN changes (handover between SGSNs). This negotiation is needed because the SNDCP and LLC protocols are located in the SGSN and the new SGSN is not aware of the old XID parameters (and they may not be applicable either). XID negotiation is done for some (most but not all) LLC and SNDCP parameters, such as header compression parameters. ...

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Abstract

Instead of renegotiating parameters relating to an optimization algorithm previously negotiated between a mobile station and a target radio network subsystem during connection handover of the mobile station from a source radio network subsystem, prestored parameters are transferred instead between the source radio network subsystem and the target radio network subsystem either directly over an existing Iur interface or via a core network over an Iu interface.

Description

technical field [0001] Second and third generation cellular packet systems. Background technique [0002] As shown in Figure 13, in the Global System for Mobile Telecommunications / General Packet Radio Service (GSM / GPRS) network architecture, there are various architectural elements related to known data protocol stacks, including Mobile Station (MS), including Base Transceiver Station (BTS) and Base Station Subsystem (BSS) of Base Station Controller (BSC), Serving GPRS Support Node (SGSN) and Gateway GPRS Support Node (GGSN). MS and SGSN share the Subnetwork Dependent Convergence Protocol (SNDCP) layer and Peer Logical Link Control (LLC) in the user plane. [0003] A typical GPRS negotiation required between a mobile station and a peer entity in some fixed network equipment is an Exchange Identity or XID negotiation, where so-called L3CE (Layer 3 Compatibility Entity) parameters are agreed upon. [0004] The UMTS packet network architecture is very similar to GPRS, but the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04W36/12
CPCH04W36/12
Inventor J·舒梅基H·卡利奥K·阿马瓦尔拉J·卡利奥库于A·托鲁宁
Owner NOKIA TECH OY