Pathloss reference configuration in a wireless device and base station

• US 8,995,405 B2
• Filed: 01/24/2013
• Issued: 03/31/2015
• 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): Pasia, Redentor
• Assistant Examiner(s): Rivas, Salvador E
• Application Number:
  US13/748,587
• Publication Number:
  US 20130188614A1
• Time in Patent Office: 796 Days
• US Class Current: 370/336
• 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 base station transmits message(s) assigning each of at least one secondary cell to a cell group in cell groups comprising a primary cell group and a secondary cell group. The at least one message comprises a pathloss reference for a secondary cell. The pathloss reference is a configurable parameter if the secondary cell is in the primary cell group. The configurable parameter is configurable to a downlink of the secondary cell or the primary cell. The pathloss reference is only configurable as a downlink of the secondary cell if the secondary cell is in the secondary cell group.

Claims

1. A method comprising:

a) transmitting, by a base station configured to communicate employing a plurality of cells, at least one control message to a wireless device in a plurality of wireless devices, said at least one control message;

i) configured to cause in said wireless device;

(1) configuration of at least one secondary cell in said plurality of cells; and

(2) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising;

(a) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising a primary cell, uplink signals transmitted by said wireless device in said primary cell group employing a first synchronization signal transmitted on said primary cell; and

(b) a secondary cell group comprising a second subset of said at least one secondary cell, said second subset comprising a reference secondary cell, uplink signals transmitted in said secondary cell group employing a second synchronization signal on said reference secondary cell as a secondary timing reference; and

ii) comprising a plurality of dedicated parameters for a secondary cell in said at least one secondary cell, said plurality of dedicated parameters;

(1) specific to said wireless device; and

(2) comprising a transmission power pathloss reference employed for transmission power determination of uplink signals of said secondary cell, said transmission power pathloss reference;

(a) being a configurable parameter if said secondary cell is in said primary cell group, said configurable parameter being configurable to one of the following;

 

(i) a downlink of said secondary cell; and

 

(ii) a downlink of said primary cell; and

(b) being only configurable as a downlink of said secondary cell if said secondary cell is in said secondary cell group; and

b) receiving, by said base station, uplink signals in said secondary cell from said wireless device, transmission power of said uplink signals being determined, at least in part, employing a received power of said transmission power pathloss reference assigned to said secondary cell.

2. The method of claim 1, wherein said transmission power of said uplink signals is determined, at least in part, employing measurements of the received power of said transmission power pathloss reference assigned to said secondary cell.

3. The method of claim 1, wherein said transmission power of said uplink signals is determined, at least in part, further employing at least one power control parameter in said at least one control message.

4. The method of claim 1, wherein said transmission power of said uplink signals is determined, at least in part, further employing power control commands transmitted by said base station.

5. The method of claim 1, wherein said plurality of dedicated parameters further include:

a) a cell group index for said secondary cell, said cell group index identifying one of a plurality of cell groups, said plurality of cell groups comprising a primary cell group and a secondary cell group; and

b) a time alignment timer parameter for each cell group in said plurality of cell groups.

6. The method of claim 1, further comprising transmitting, by said base station, a control command configured to cause transmission of a random access preamble on random access resources of said secondary cell in said secondary cell group, transmission power of said random access preamble calculated employing said received power of said transmission power pathloss reference assigned to said secondary cell.

7. The method of claim 1, further comprising transmitting, by said base station, at least one control packet for providing transport format information, resource allocation information, and power control commands for transmission of a plurality of packets to be transmitted on a first data channel of said secondary cell, transmission power of said plurality of packets calculated employing, at least in part:

a) said received power of said transmission power pathloss reference assigned to said secondary cell; and

b) said power control commands.

8. The method of claim 1, further comprising, prior to transmitting said at least one control message:

a) establishing a first signaling bearer between said base station and said wireless device, said establishing comprising said base station transmitting a control message to said wireless device on said primary cell; and

b) receiving, by said base station, a plurality of radio capability parameters from said wireless device on said first signaling bearer on said primary cell, said plurality of radio capability parameters indicating that said wireless device supports configuration of said plurality of cell groups.

9. The method of claim 1, wherein said at least one control message is configured to further cause in said wireless device configuration of a time alignment timer for each of said plurality of cell groups, said time alignment timer starting or restarting in response to said wireless device receiving a timing advance command to adjust uplink transmission timing of a commanded cell group in said plurality of cell groups.

10. The method of claim 1, wherein said at least one control message comprises a media access control dedicated information element comprising a sequence of at least one first information element, each of said at least one first information element comprising:

a first cell group index of a first secondary cell group; and

a first time alignment timer for said first secondary cell group.

11. A base station, configured to communicate employing a plurality of cells, comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said base station to;

i) transmit at least one control message to a wireless device, said at least one control message;

(1) configured to cause in said wireless device;

(a) configuration of at least one secondary cell in said plurality of cells; and

(b) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising;

 

(i) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising a primary cell; and

 

(ii) a secondary cell group comprising a second subset of said at least one secondary cell; and

(2) comprising a transmission power pathloss reference employed for transmission power determination of uplink signals of a secondary cell in said at least one secondary cell, said transmission power pathloss reference;

(a) being a configurable parameter if said secondary cell is in said primary cell group, said configurable parameter being configurable to one of the following;

 

(i) a downlink of said secondary cell; and

 

(ii) a downlink of said primary cell; and

(b) being only configurable as a downlink of said secondary cell if said secondary cell is in said secondary cell group; and

ii) receive uplink signals in said secondary cell from said wireless device, transmission power of said uplink signals being determined, at least in part, employing a received power of said transmission power pathloss reference assigned to said secondary cell.

12. The base station of claim 11, wherein said transmission power of said uplink signals being determined, at least in part, employing measurements of the received power of said transmission power pathloss reference assigned to said secondary cell.

13. The base station of claim 11, wherein said transmission power of said uplink signals is determined, at least in part, further employing at least power control parameter in said at least one control message.

14. The base station of claim 11, wherein said transmission power of said uplink signals is determined, at least in part, further employing power control commands transmitted by said base station.

15. The base station of claim 11, wherein said instructions further cause said base station to transmit a control command configured to cause transmission of a random access preamble on random access resources of said secondary cell in said secondary cell group, transmission power of said random access preamble calculated employing said received power of said transmission power pathloss reference assigned to said secondary cell.

16. A wireless device comprising:

a) one or more communication interfaces;

b) one or more processors; and

c) memory storing instructions that, when executed, cause said wireless device to;

i) receive at least one control message from a base station, said base station configured to communicate employing a plurality of cells with said wireless device, said at least one control message;

(1) causing in said wireless device;

(a) configuration of at least one secondary cell in said plurality of cells; and

(b) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising;

 

(i) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising a primary cell; and

 

(ii) a secondary cell group comprising a second subset of said at least one secondary cell; and

(2) comprising a transmission power pathloss reference employed for transmission power determination of uplink signals of a secondary cell in said at least one secondary cell, said transmission power pathloss reference;

(a) being a configurable parameter if said secondary cell is in said primary cell group, said configurable parameter being configurable to one of the following;

 

(i) a downlink of said secondary cell; and

 

(ii) a downlink of said primary cell; and

(b) being only configurable as a downlink of said secondary cell if said secondary cell is in said secondary cell group; and

ii) transmit to said base station uplink signals in said secondary cell, transmission power of said uplink signals being determined, at least in part, employing a received power of said transmission power pathloss reference assigned to said secondary cell.

17. The wireless device of claim 16, wherein said instructions further cause said wireless device to receive at least one timing advance command from said base station, said timing advance command comprising:

a) a time adjustment value; and

b) an index identifying said secondary cell group; and

wherein said at least one timing advance command configured to cause substantial alignment of reception timing of uplink signals in frames and subframes of said secondary cell group at said base station.

18. The wireless device of claim 16, wherein said at least one control message comprises at least one cell-add-modify information element, each of said at least one cell-add-modify information element comprises a first plurality of dedicated parameters in said plurality of dedicated parameters, said first plurality of dedicated parameters comprising a first cell index for a first secondary cell in said at least one secondary cell.

19. The wireless device of claim 16, wherein said wireless device is assigned, by said configuration, 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 unique cell group time alignment timer in said wireless device.

20. The wireless device of claim 16, wherein said instructions further cause said wireless device to receive, from said base station, at least one control packet for providing transport format information, resource allocation information, and power control commands for transmission of a plurality of packets to be transmitted on a first data channel of said secondary cell, transmission power of said plurality of packets calculated employing, at least in part:

a) said received power of said transmission power pathloss reference assigned to said secondary cell; and

b) said power control commands.