METHODS AND APPARATUS FOR REGISTRATION AND DATA TRANSMISSION USING FAST/ZERO CONTENTION RESOLUTION

• US 20110222492A1
• Filed: 03/10/2011
• Published: 09/15/2011
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Hanov, Steven Michael, Borsella, Remo, Hole, David Philip, Venkob, Satish, Faurie, Rene, Kreuzer, Werner Karl
• Granted Patent: US 8,730,886 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0875 with assigned priorities based access

Abstract

Example methods and apparatus for registration and data transmission using fast/zero contention resolution are disclosed. An example method for transmission on a random-access channel (RACH) involves transmitting a mobile station radio access capabilities (MS RAC) message to a network and receiving an identification (ID) from the network subsequent to the MS RAC. The ID is locally unique and provides contention resolution. A timing advance is determined and further transmissions are performed on the RACH using the ID and the TA.

Claims

1. A method performed by a device for transmission on a random-access channel (RACH) comprising:

transmitting a mobile station radio access capabilities (MS RAC) message to the network;

receiving an identification (ID) from the network subsequent to the MS RAC, the ID being locally unique and providing contention resolution;

determining a timing advance (TA); and

performing further transmissions on the RACH using the ID and the TA.

2. The method of claim 1 wherein the transmitting is from the device to a base station (BS) serving a cell and the receiving is from the BS to the device.

3. The method of claim 2 wherein the method is performed for registration on a network and the method is repeated when:

the device is served by a different cell;

the device is reset;

the registration has failed;

or

the timing advance has changed.

4. The method of claim 3 wherein the registration is for data services.

5. The method of claim 1 further comprising receiving assignment to a RACH dedicated to the device for the further transmissions.

6. The method of claim 2 further comprising receiving an assignment of membership to a RACH group, wherein a member of the RACH group is assigned to transmit on a frame on the RACH, the frame dedicated to the RACH group.

7. The method of claim 6 further comprising receiving a combination of the ID and the RACH group, the combination uniquely identifying the device within the cell and providing contention resolution.

8. The method of claim 7, further comprising receiving a global identifier for the device, wherein the global identifier is determined from the combination.

9. The method of claim 8 wherein the global identifier comprises an international mobile subscriber identity (IMSI).

10. The method of claim 6 further comprising calculating group frame numbers as a function of the ID and as a function of a fixed repetition period.

11. The method of claim 6 wherein the RACH group has a maximum membership of 2̂

(n−

1) where n is a number of bits in a random number reference in an access burst.

12. The method of claim 6 further comprising calculating group frame numbers as a function of the ID and as a function of a variable repetition period.

13. The method of claim 12 wherein the variable repetition period is a function of transmission frequency requirements of the members of the RACH group.

14. The method of claim 6 wherein the calculating group frame numbers applies a unique offset as a function of the RACH group.

15. A device comprising:

a processor configured to;

transmit a mobile station radio access capabilities (MS RAC) message to a network;

receive an identification (ID) from the network subsequent to the MS RAC, the ID being locally unique and providing contention resolution;

determining a timing advance (TA); and

perform further transmissions on the RACH using the ID and TA.