Integration of 802.21 media independent handover functionality to radio interface layer and telephony server

A radio interface layer, media-independent technology, applied in wireless communication, wireless network protocol, electrical components, etc., can solve the problem of RIL and telephone communication server lacking the ability to switch between systems

Inactive Publication Date: 2011-01-05
INTERDIGITAL TECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] The RIL and telephony servers described above lack the ability to support intersystem handover across different radio access technologies

Method used

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  • Integration of 802.21 media independent handover functionality to radio interface layer and telephony server
  • Integration of 802.21 media independent handover functionality to radio interface layer and telephony server
  • Integration of 802.21 media independent handover functionality to radio interface layer and telephony server

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0071] 1. A wireless transmit / receive unit (WTRU), the WTRU comprising:

[0072] A radio interface layer (RIL) configured to support intersystem handover, the RIL includes:

[0073] at least two RIL agents, each RIL agent configured to implement RIL application functions;

[0074] RIL Media Independent Handover (RIL MIH) client;

[0075] a first radio access technology (RAT) RIL driver configured to send a radio link status indication to said RIL MIH client and communicate with said at least two during an active first RAT call One of the RIL agents communicates directly;

[0076] a second RAT RIL driver configured to send a radio link status indication to said RIL MIH client and communicate with one of said at least two RIL proxies during an active second RAT call direct communication; and

[0077] upper protocol stack, wherein the RIL MIH client is configured as:

[0078] receiving a radio link status indication from the first RAT RIL driver and the second RAT RIL driver; ...

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Abstract

A radio interface layer media independent handover (RIL MIH) client (610) functionality enables transparent inter-system handover of a wireless transmit / receive unit (WTRU) between different radio access technologies (RATs), without user intervention. The RIL MIH client interacts with RIL drivers (630, 635) and proxies (605), informs the RIL proxies of the handover status, then the proxies interact with a new driver in use. A WTRU is modified to add MIH functionality to a telephony server to support inter-system handover.

Description

technical field [0001] This application relates to wireless communications. Background technique [0002] The IEEE 802.21 standard provides a unified set of functionality that facilitates and enhances handover between different link layer technologies. In particular, IEEE 802.21 defines a Media Independent Handover (MIH) client located in a communicating entity of some wireless systems capable of supporting intersystem handover. [0003] At a high level, enhanced handover capabilities introduce upper-level MIH users capable of communicating with local or remote MIH clients over transmission media. The MIH client in turn interacts with the link layer device. US Patent Application No. 11 / 862,963, filed September 27, 2007, discloses an 802.21 MIH client. [0004] The purpose of the 802.21 client is to allow efficient software implementation of handover between different technologies such as Wireless Broadband (WiBro) to Universal Mobile Telecommunications System (UMTS). The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14
CPCH04W88/06H04W36/0011H04W36/005H04W36/14H04W80/02H04W80/04
Inventor D·普尔卡亚斯塔M·佩拉S·A·拉赫曼U·奥维拉-赫恩安德茨A·G·卡尔顿S·考尔
Owner INTERDIGITAL TECH CORP
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