Methods and apparatus for registration and data transmission using fast/zero contention resolution

• US 8,730,886 B2
• Filed: 03/10/2011
• Issued: 05/20/2014
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Borsella, Remo, Hole, David Philip, Faurie, Rene, Venkob, Satish, Hanov, Steven Michael, Kreuzer, Werner Karl
• Primary Examiner(s): NGUYEN, ANH NGOC M
• Application Number:
  US13/045,165
• Publication Number:
  US 20110222492A1
• Time in Patent Office: 1,167 Days
• Field of Search: 370/312, 370/328, 370/329, 370/431, 370/310, 370/310.2, 370/336, 370/465, 370/468
• 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 a network;

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

determining a timing advance (TA);

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

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.

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 1 wherein the method is performed for registration on the 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 an assignment to the RACH dedicated to the device for the further transmissions.

6. The method of claim 1 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.

7. The method of claim 6, further comprising receiving a global identifier for the device, wherein the global identifier is determined from the combination.

8. The method of claim 7 wherein the global identifier comprises an international mobile subscriber identity (IMSI).

9. The method of claim 1 further comprising calculating group frame numbers as a function of the ID and as a function of a fixed repetition period.

10. The method of claim 1 wherein the RACH group has a maximum membership of 2^(n−

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

11. The method of claim 1 further comprising calculating group frame numbers as a function of the ID and as a function of a variable repetition period.

12. The method of claim 11 wherein the variable repetition period is a function of transmission frequency requirements of the members of the RACH group.

13. The method of claim 11 wherein the calculating group frame numbers applies a unique offset as a function of the RACH group.

14. A device comprising:

a transceiver coupled to a processor;

the processor configured to;

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

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

determine a timing advance (TA); and

perform further transmissions on a random-access channel (RACH) using the ID and the TA without performing contention resolution.

15. A device as defined in claim 14, wherein the ID being locally unique comprises the ID being locally unique in a cell of the network.

20. A device as defined in claim 14, wherein the processor is further configured to receive 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.

16. A device comprising:

a transceiver coupled to a processor;

the processor configured to;

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

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

determine a timing advance (TA);

perform further transmissions on a random-access channel (RACH using the ID and the TA;

and determine group frame numbers associated with a RACH group as a function of the ID and as a function of a fixed repetition period.

17. A device as defined in claim 16, wherein the ID being locally unique comprises the ID being locally unique in a cell of the network.

18. A device comprising:

a transceiver coupled to a processor;

the processor configured to;

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

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

determine a timing advance (TA);

perform further transmissions on a random-access channel (RACH) using the ID and the TA;

and determine group frame numbers associated with a RACH group as a function of the ID and as a function of a variable repetition period that is a function of transmission frequency requirements of members of the RACH group.

19. A device as defined in claim 18, wherein the ID being locally unique comprises the ID being locally unique in a cell of the network.