Browse Prior Art Database

CELLULAR TELEPHONE CALL RESOURCE REDISTRIBUTION TO ACCOMMODATE PRIORITY CALLS

IP.com Disclosure Number: IPCOM000007676D
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2002-Apr-15
Document File: 2 page(s) / 90K

Publishing Venue

Motorola

Related People

Larry Baltz: AUTHOR [+2]

Abstract

In Cellular telephone systems it is desirable to maximize the use of the available Radio frequency bandwidth in any given coverage area. Certain types of calls may require more bandwidth than others and a scheme to redistribute and match calls to avail- able bandwidth is desirable.

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MOlVROLA Technical Developments

CELLULAR TELEPHONE CALL RESOURCE REDISTRIBUTION TO ACCOMMODATE PRIORITY CALLS'

by Larry Baltz and Derek Oxley

ABSTRACT

OPERATION

  In Cellular telephone systems it is desirable to maximize the use of the available Radio frequency bandwidth in any given coverage area. Certain types of calls may require more bandwidth than others and a scheme to redistribute and match calls to avail- able bandwidth is desirable.

  If a priority call comes into the system and the current cell does not have the necessary bandwidth to grant the request a search will commence to deter- mine if subscribers can be moved off to adjacent cells or reassigned different slot assignments in the current cell. This can be'determined by requesting the list ofpreferred targets that each subscriber unit has been monitoring during the lifetime of that call. If one or a number of subscribers can be redistributed without loss of quality on the voice path and the priority request can be granted then the redistribution will occur. The resulting' actions of the system will be to move one or a number of subscribers off to adjacent cells and also grant the request for the pri- ority call.

PURPOSE OF INVENTION

EXAMPLE

  In a Cellular system such as iDEN there are requests for interconnect calls that have bandwidth requirements with interleave ratios of both 3 to 1 and 6 to 1. A 3 to 1 call requires twice the bandwidth requirements of a 6 to 1 call and can be considered a priority call. Such calls have a higher probability of Radio Frequency blocking due to the need for greater bandwidth. By redist...