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Network Controlled/Assisted Cell Reselection for Point-to-Multipoint Data Transmission

IP.com Disclosure Number: IPCOM000020537D
Original Publication Date: 2003-Dec-25
Included in the Prior Art Database: 2003-Dec-25
Document File: 1 page(s) / 47K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

Frequent and periodic cell reselection within a GSM (Global System for Mobile Communications) environment has a pronounced negative impact on applications that are requiring a certain configuration and availability of resources to work properly. This is primarily due to the manner in which user mobility for GPRS (General Packet Radio Service) is managed. So e.g., for Multimedia Broadcast/Multicast Services (MBMS), it is of paramount importance that a cell to be selected supports this service in a similar manner which is supported in the current cell. Up to now, a mobile aborts its operation on the old cell (e.g. when the user leaves the radio range of an area), reselects a new cell and attempts to set up a packet data transfer which may fail because the new cell may not have sufficient capacity to support another mobile. The mobile must now wait and try to set up the transfer again or may reselect to another cell which may accommodate its request for a packet data transfer (and MBMS session).

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© SIEMENS AG 2003 file: 2003J15494.doc page: 1

Network Controlled/Assisted Cell Reselection for Point-to-Multipoint Data Transmission

Idea: Werner Kreuzer, DE-Muenchen

Frequent and periodic cell reselection within a GSM (Global System for Mobile Communications) environment has a pronounced negative impact on applications that are requiring a certain configuration and availability of resources to work properly. This is primarily due to the manner in which user mobility for GPRS (General Packet Radio Service) is managed. So e.g., for Multimedia Broadcast/Multicast Services (MBMS), it is of paramount importance that a cell to be selected supports this service in a similar manner which is supported in the current cell.

Up to now, a mobile aborts its operation on the old cell (e.g. when the user leaves the radio range of an area), reselects a new cell and attempts to set up a packet data transfer which may fail because the new cell may not have sufficient capacity to support another mobile. The mobile must now wait and try to set up the transfer again or may reselect to another cell which may accommodate its request for a packet data transfer (and MBMS session).

Contrary to the full autonomous cell reselection, it is proposed that the user equipment (UE) provides basic information that a cell reselection is imminent to the network. Additionally, it may also provide to the network an indication of the cell to which it expects to reselect. Once the network has received the indication from the mobile that a cell reselection is imminent the n...