Method and apparatus for call set up in a wireless communication system that permits a sharing of mobile identifiers

• US 20060073834A1
• Filed: 09/23/2004
• Published: 04/06/2006
• Est. Priority Date: 09/23/2004
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Thorson, Dean E.
• Granted Patent: US 7,333,797 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers

Abstract

A communication system reduces a likelihood that a call is set up with a wrong mobile station (MS) when a same Mobile Identification Number (MIN) is shared by multiple MSs by allocating duplicate physical layer parameters to each MS. In response to receiving a call, the system pages an MS. When the system receives a first page response from the first MS and a second page response from a second MS due to a shared MIN, the system allocates multiple duplicate physical layer parameters to each MS. The system then conveys a first channel assignment to the first MS and a second channel assignment to the second MS, wherein each channel assignment identifies the allocated multiple physical layer parameters. By allocating duplicate physical layer parameters to each MS, the intended MS is able to successfully set up a communication session regardless of an order of conveyance of the channel assignments.

Claims

1. A method for setting up a wireless call comprising:

receiving a call intended for a first mobile station;

paging the first mobile station;

receiving a first response to the page from the first mobile station and a second response to the page from a second mobile station;

allocating a same plurality of physical layer parameters to each mobile station of the first mobile station and the second mobile station;

conveying a first channel assignment in association with the plurality of physical layer parameters allocated to the first mobile station; and

conveying a second channel assignment in association with the plurality of physical layer parameters allocated to the second mobile station.

2. The method of claim 1, wherein allocating a same plurality of physical layer parameters to each mobile station of the first mobile station and the second mobile station comprises:

allocating physical layer parameters to the first mobile station;

determining that a same mobile identifier is associated with each of the first mobile station and the second mobile station; and

in response to determining that a same mobile identifier is associated with each of the first and second mobile stations, allocating to the second mobile station a same plurality of physical layer parameters as a plurality of physical layer parameters allocated to the first mobile station.

3. The method of claim 2, further comprising maintaining mobile identity information in association with each of the first mobile station and the second mobile station and wherein determining that a same mobile identifier is associated with each of the first mobile station and the second mobile station comprises comparing mobile identity information included in the second response to the page with the mobile identity information maintained in association with each of the first mobile station and the second mobile station.

4. The method of claim 2, further comprising:

receiving, by the first mobile station, the first channel assignment;

successfully despreading, by the first mobile station, a first traffic channel based on the plurality of physical layer parameters;

receiving, by the second mobile station, the first channel assignment; and

successfully despreading, by the second mobile station, a second traffic channel based on the plurality of physical layer parameters.

5. The method of claim 4, further comprising:

establishing a first traffic channel with the first mobile station;

establishing a second traffic channel with the second mobile station;

completing a call setup with one of the first mobile station and the second mobile station; and

prematurely terminating the call setup process with the other mobile station.

6. The method of claim 2, further comprising:

receiving, by the first mobile station, the second channel assignment;

successfully despreading, by the first mobile station, a first traffic channel based on the plurality of physical layer parameters;

receiving, by the second mobile station, the second channel assignment; and

successfully despreading, by the second mobile station, a second traffic channel based on the plurality of physical layer parameters.

7. The method of claim 6, further comprising:

establishing a first traffic channel with the first mobile station;

establishing a second traffic channel with the second mobile station;

completing a call setup with one of the first mobile station and the second mobile station; and

prematurely terminating the call setup process with the other mobile station.

8. The method of claim 1, further comprising:

establishing a first traffic channel with the first mobile station;

establishing a second traffic channel with the second mobile station;

completing a call setup with one of the first mobile station and the second mobile station; and

prematurely terminating the call setup process with the other mobile station.

9. The method of claim 1, wherein the page comprises a mobile identifier associated with both the first mobile station and the second mobile station.

10. The method of claim 9, further comprising:

maintaining the mobile identifier by the first mobile station; and

maintaining the mobile identifier by the second mobile station.

11. The method of claim 10, further comprising:

receiving, by the first mobile station, the page;

determining, by the first mobile station, that the mobile identifier included in the page matches the mobile identifier maintained by the first mobile station;

in response to determining a match by the first mobile station, conveying, by the first mobile station, the first response to the page;

receiving, by the second mobile station, the page;

determining, by the second mobile station, that the mobile identifier included in the page matches the mobile identifier maintained by the second mobile station; and

in response to determining a match by the second mobile station, conveying, by the second mobile station, the second response to the page.

12. A base station comprising a processor that receives a call intended for a first mobile station, pages the first mobile station, receives a first response to the page from the first mobile station and a second response to the page from a second mobile station, allocates a same plurality of physical layer parameters to each of the first mobile station and the second mobile station, conveys a first channel assignment in association with the plurality of physical layer parameters allocated to the first mobile station, and conveys a second channel assignment in association with the plurality of physical layer parameters allocated to the second mobile station.

13. The base station of claim 12, wherein the processor intentionally allocates a same plurality of physical layer parameters to the second mobile station by determining that a same mobile identifier is associated with each of the first mobile station and the second mobile station, and in response to so determining, allocates to the second mobile station the same plurality of physical layer parameters as a plurality of physical layer parameters allocated to the first mobile station.

14. The base station of claim 13, further comprising at least one memory device that maintains mobile identity information associated with each mobile station serviced by the base station and wherein the processor determines a same mobile identifier is associated with each of the first mobile station and the second mobile station by comparing the mobile identity information contained in the second response to the page with the mobile identity information maintained in the at least one memory device.

15. The base station of claim 12, wherein the page comprises a mobile identifier associated with both the first mobile station and the second mobile station.

16. The base station of claim 12, wherein the processor further establishes a first traffic channel with the first mobile station, establishes a second traffic channel with the second mobile station, completes a call setup with one of the first mobile station, and prematurely terminates the call setup process with the other mobile station.