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Balancing paging load and tracking area updates

A technology for tracking area updates and tracking areas, which is applied in broadcast service distribution, connection management, network topology, etc., and can solve problems such as unclear standards and methods, and increased paging load

Inactive Publication Date: 2010-01-13
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that, for paging or other purposes, the network can only reach the WTRU through all assigned TAs, which unnecessarily increases the paging load
Furthermore, the criteria and method for assigning multiple TAs to a WTRU is unclear

Method used

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  • Balancing paging load and tracking area updates
  • Balancing paging load and tracking area updates
  • Balancing paging load and tracking area updates

Examples

Experimental program
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Effect test

Embodiment

[0070] CLAIMS 1. A method in a base station for allocating a tracking area (TA), comprising: determining a mobility state of a wireless transmit / receive unit (WTRU); and allocating a TA based on the determined mobility state.

[0071] 2. The method of embodiment 1 wherein the allocating comprises allocating a TA or small TA to the WTRU when the WTRU is in one of a stationary state and a low mobility state.

[0072] 3. The method of embodiment 2, wherein the small TA contains more than one cell.

[0073] 4. The method of embodiment 1, wherein the allocating comprises allocating multiple TAs or large TAs to the WTRU when the WTRU is in a high mobility state.

[0074] 5. The method of embodiment 4, wherein the large TA comprises multiple cells.

[0075] 6. A method, in a wireless transmit / receive unit (WTRU), for determining access to a restricted subscriber group (CSG) cell, comprising: receiving a CSG tracking area (TA) identifier; storing the received CSG TA an identifier; r...

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Abstract

A method for assigning a tracking area (TA) is disclosed. A mobility state of a wireless transmit / receive unit (WTRU) is determined and the TA is assigned based on the determined mobility state. Also disclosed is a method for accessing a closed subscriber group (CSG) TA. A CSG TA identifier is received at a WTRU and is stored. A CSG TA broadcast is received and the broadcast CSG TA is accessed if an identifier of the broadcast CSG TA matches the stored CSG TA identifier. Also disclosed is a method for changing a mobility state of a WTRU. A current mobility state of the WTRU is determined and a predetermined metric of the WTRU is examined. The predetermined metric is evaluated to determine if the metric has crossed a threshold and the mobility state is changed based on the evaluated metric.

Description

technical field [0001] The present invention relates to wireless communications. Background technique [0002] The 3rd Generation Partnership Project (3GPP) recently launched the Long Term Evolution (LTE) project to provide new technologies, new network structures, new configurations, and new applications and services to wireless cellular networks to provide improved spectral efficiency and faster user experience. [0003] In LTE, the Tracking Area (TA) concept replaces the Universal Mobile Telecommunications System (UMTS) Routing Area / Location Area (RA / LA) and UMTS Terrestrial Radio Access Network Registration Area (URA) concepts to simplify mobile area tracking operations And reduce the load caused by the area update that the Wireless Transmit / Receive Unit (WTRU) has to perform. When a WTRU is in the LTE_IDLE state, it typically does not send or receive any packets. Because the WTRU is not in active communication with the base station or enhanced Node B (eNB), its locat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/02H04W60/00H04W68/00
CPCH04W36/22H04W84/105H04W8/186H04W4/08H04W8/205H04W68/00H04W76/38H04W36/324H04W36/362H04W68/02H04W68/04H04W84/042H04W36/32H04W36/04
Inventor P·S·王R·P·穆克吉S·索马桑德朗J·M·米勒U·奥维拉-赫恩安德茨
Owner INTERDIGITAL TECH CORP
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