Random access in networks with carrier aggregation

• US 9,363,832 B2
• Filed: 11/01/2015
• Issued: 06/07/2016
• Est. Priority Date: 01/25/2012
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Ofinno Technologies, LLC
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Mohebbi, Kouroush
• Application Number:
  US14/929,395
• Publication Number:
  US 20160057786A1
• Time in Patent Office: 219 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04J 2011/0096 Network synchronisation
• CPC Class Codes: H04L 27/2692 with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
• CPC Class Codes: H04L 27/32 Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04L 65/1066 Session management
• CPC Class Codes: H04W 28/00 Network traffic management; Network resource management
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 48/00 Access restriction access security to prevent unauthorised access H04W12/08; Network selection; Access point selection
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/14 Separate analysis of uplink or downlink
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/18 TPC being performed according to specific parameters
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0005 : synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/001 : Synchronization between nodes
• CPC Class Codes: H04W 56/0045 : compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 74/006 : in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 : Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices

Abstract

A wireless device receives a control command initiating a random access process for a secondary cell. The wireless device transmits a random access preamble on random access resources of the secondary cell. The wireless device aborts the random access process if the secondary cell is deactivated before the wireless device receives a random access response.

Claims

1. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed, cause the wireless device to;

receive from a base station at least one message comprising;

configuration parameters of a plurality of cells comprising a primary cell and at least one secondary cell, the plurality of cells being grouped into a plurality of cell groups comprising a primary cell group and a secondary cell group; and

a deactivation timer value for a deactivation timer corresponding to a secondary cell in the secondary cell group, the secondary cell being deactivated in the wireless device in response to the deactivation timer expiring;

receive a control command initiating a random access process for the secondary cell;

transmit a random access preamble on the secondary cell; and

abort the random access process on the secondary cell if the secondary cell is deactivated before the wireless device receives a random access response for the random access preamble transmission.

2. The wireless device of claim 1, wherein the at least one message comprises a timer value for a time alignment timer of the secondary cell group, the time alignment timer starting or restarting in response to the wireless device receiving a timing advance command to adjust uplink transmission timing of the secondary cell group.

3. The wireless device of claim 1, wherein the instructions further cause the wireless device to monitor a downlink control channel of the primary cell for the random access response after transmitting the random access preamble.

4. The wireless device of claim 1, wherein the control command comprises:

a mask index; and

an identifier of the random access preamble.

5. The wireless device of claim 1, wherein the instructions further cause the wireless device to restart the deactivation timer associated with the secondary cell in response to the wireless device receiving the control command.

6. The wireless device of claim 1, wherein the instructions further cause the wireless device to restart a first deactivation timer associated with a first cell carrying the control command if the first cell is one of the at least one secondary cell.

7. The wireless device of claim 1, wherein the instructions further cause the wireless device to restart the deactivation timer associated with the secondary cell if a random access response with an uplink grant for transmission on the secondary cell is received by the wireless device.

8. The wireless device of claim 1, wherein the at least one message comprises a plurality of common parameters for the secondary cell, the plurality of common parameters comprising:

a plurality of random access resource parameters identifying random access resources; and

a plurality of power control parameters.

9. A method for use by a wireless device, the method comprising:

receiving from a base station at least one message comprising;

configuration parameters of a plurality of cells comprising a primary cell and at least one secondary cell, the plurality of cells being grouped into a plurality of cell groups comprising a primary cell group and a secondary cell group; and

a deactivation timer value for a deactivation timer corresponding to a secondary cell in the secondary cell group, the secondary cell being deactivated in the wireless device in response to the deactivation timer expiring;

receiving a control command initiating a random access process for the secondary cell;

transmitting a random access preamble on the secondary cell; and

aborting the random access process on the secondary cell if the secondary cell is deactivated before the wireless device receives a random access response for the random access preamble transmission.

10. The method of claim 9, wherein the at least one message comprises a timer value for a time alignment timer of the secondary cell group, the time alignment timer starting or restarting in response to the wireless device receiving a timing advance command to adjust uplink transmission timing of the secondary cell group.

11. The method of claim 9, further comprising restarting the deactivation timer associated with the secondary cell in response to the wireless device receiving the control command.

12. The method of claim 9, further comprising restarting a first deactivation timer associated with a first cell carrying the control command if the first cell is one of the at least one secondary cell.

13. The method of claim 9, further comprising restarting the deactivation timer associated with the secondary cell if a random access response with an uplink grant for transmission on the secondary cell is received by the wireless device.

14. The method of claim 9, further comprising monitoring a downlink control channel of the primary cell for the random access response after transmitting the random access preamble.

15. A base station comprising:

one or more processors; and

memory storing instructions that, when executed, cause the base station to;

transmit to a wireless device at least one message comprising;

configuration parameters of a plurality of cells comprising a primary cell and at least one secondary cell, the plurality of cells being grouped into a plurality of cell groups comprising a primary cell group and a secondary cell group; and

a deactivation timer value for a deactivation timer corresponding to a secondary cell in the secondary cell group, the secondary cell being deactivated in the wireless device in response to the deactivation timer expiring;

transmit a control command to a wireless device initiating a random access process for the secondary cell, the control command comprising an identifier of a random access preamble; and

abort the random access process on the secondary cell if the secondary cell is deactivated before the base station receives the random access preamble on random access resources.

16. The base station of claim 15, wherein the at least one message comprises a plurality of common parameters for the secondary cell, the plurality of common parameters comprising:

a plurality of random access resource parameters identifying random access resources; and

a plurality of power control parameters.

17. The base station of claim 15, wherein the instructions further cause the base station to:

receive the random access preamble from the wireless device;

transmit a random access response comprising an uplink grant to the wireless device; and

abort the random access process if the secondary cell is deactivated before the base station receives an uplink packet from the wireless device in response to the uplink grant.

18. The base station of claim 15, wherein the at least one message comprises a plurality of random access resource parameters comprising:

an index;

a frequency offset; and

a plurality of sequence parameters.

19. The base station of claim 15, wherein the at least one message comprises a plurality of media access control dedicated parameters comprising a plurality of time alignment timer values, each time alignment timer value being associated with a cell group in the wireless device.

20. The base station of claim 15, wherein the instructions further cause the base station to restart the deactivation timer associated with the secondary cell in response to the base station transmitting the control command.