Channel waiting method for a radio system

• US 5,625,879 A
• Filed: 02/28/1996
• Issued: 04/29/1997
• Est. Priority Date: 08/08/1991
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Nokia Telecommunications Oy (Nokia Corporation)
• Inventors: Tuulos, Martti
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): VO, NGUYEN THANH
• Application Number:
  US08/608,204
• Time in Patent Office: 426 Days
• Field of Search: 455/33.1, 455/34.1, 455/34.2, 455/53.1, 455/54.1, 455/54.2, 455/56.1, 455/58.1, 455/58.2, 455/62, 455/67.1
• US Class Current: 455/509
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 72/563 of the wireless resources

Abstract

A channel waiting method in a radio system, in which a plurality of base stations, mobile radio stations and a mobile services switching center which allocates radio channels to all calls in which one or more mobile stations participate and places the call in wait mode if radio channel capacity required by the call is not available. In order to avoid unnecessary reservation of radio channels and to ensure allocation of channels to all calls, the radio channel capacity available at a time is, at most, partly dependent on the waiting order of the calls, allocated to the waiting call for which the available channel capacity is the most suitable in view of the suitability value calculated for the call and when all the radio capacity required by the call is available.

Claims

1. A channel waiting method for a radio system which includes a plurality of fixed radio stations positioned apart from one another in a geographical area covered by the radio system, a plurality of mobile radio stations, and a mobile services switching centre which allocates radio channels to all calls in which one or more of said mobile stations participate and places a given call in wait mode if radio channel capacity required by said call is not available, said method comprising the steps carried out at said mobile services switching centre, of:

keeping all calls waiting in a common waiting pool;

calculating a suitability value for each of the waiting calls each time new channel capacity becomes available, the calculated suitability value of each waiting call indicating the lowest suitability when all the radio channel capacity required by said call is not available.

allocating, at most, partly dependent on the waiting order of the waiting calls, the new available channel capacity to a one of said waiting calls for which the available channel capacity is most suitable on the basis of the calculated suitability values of the waiting calls, and when all the radio channel capacity required by said one waiting call is available.

2. A method according to claim 1, wherein:

said step of calculating the suitability value is performed so that waiting time is evenly distributed among all waiting calls having the same suitability.

3. A method according to claim 1, wherein:

calculating a suitability for each of said waiting calls includes calculating when all the radio channel capacity required by each respective call has become available, a priority of each respective call, the number of radio channels required by each respective call, the elapsed waiting time of each respective call, and the number of instances in which each respective call has been allocated to waiting calls.

4. A method according to claim 3, wherein:

in calculating the respective suitability values for each of the waiting calls, the priority of each waiting call is weighted most.

5. A method according to claim 3, wherein:

in calculating the respective suitability values for each of the waiting calls, calls are favoured which use the smallest number of radio channels.

6. A method according to claim 1, wherein:

the suitability value of each call is calculated as follows;

space="preserve" listing-type="equation">S(X)=[Pr(X)*w-W(X) +Pa(X)]*[1+G(A(X))]

wherein S is the suitability value, X is a given waiting call, A(X) is the time the call X has waited, Pr(X) is the priority of the call X, W(X) is the number of radio channels required by the call X, w is the maximum value of W(X), and Pa(X) is the number of instances in which the call X has been passed when available radio channel capacity has been allocated to waiting calls.