Multicarrier signal transmission in wireless communications

• US 8,897,248 B2
• Filed: 01/25/2013
• Issued: 11/25/2014
• Est. Priority Date: 01/25/2012
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Ofinno Technologies, LLC (Ofinno, LLC)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Hailu, Kibrom T
• Application Number:
  US13/750,954
• Publication Number:
  US 20130188582A1
• Time in Patent Office: 669 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• 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 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• 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 74/085 collision avoidance

Abstract

A wireless device receives a control command for transmission of a random access preamble on a first cell in the plurality of cells. A fourth packet is scheduled for parallel uplink transmission with the random access preamble transmission. The fourth packet is one of a first control packet, a second packet and a third packet. The wireless device transmits the random access preamble. The wireless device transmits the fourth packet in parallel with the random access preamble, unless the random access preamble and the fourth packet are scheduled for transmission in the same cell group.

Claims

1. A method comprising:

a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device;

i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and

ii) 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

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

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

iii) configuration of at least one random access channel;

iv) configuration of at least on uplink data channel on said plurality of cells; and

v) configuration of an uplink control channel of said primary cell;

b) receiving, by said wireless device, a control command for transmission of a random access preamble on a first cell in said plurality of cells, a fourth packet being scheduled for parallel uplink transmission with said random access preamble transmission, said fourth packet being any one of the following packets;

i) a first control packet on said uplink control channel;

ii) a second packet comprising uplink control information on an uplink data channel in said at least one uplink channel; and

iii) a third packet on an uplink data channel of said plurality of cells; and

c) transmitting, by said wireless device, said random access preamble on one of said at least one random access channel; and

d) transmitting, by said wireless device, said fourth packet in parallel with said random access preamble, unless said random access preamble and said fourth packet are scheduled for transmission in the same cell group.

2. The method of claim 1, wherein said first cell is said primary cell.

3. The method of claim 1, wherein said at least one control message further causes in said wireless device configuration of a plurality of channel parameters for the following channels:

a) said uplink control channel on said primary cell;

b) said at least one uplink data channel; and

c) an uplink random access channel on said first cell.

4. The method of claim 1, wherein said wireless device reduces or scales transmission power of said fourth packet such that a total calculated transmission power is equal to or less than a predefined value.

5. The method of claim 1, wherein transmission power priorities are employed by said wireless device to reduce or scale linear transmission power of said packet such that a total calculated transmission power is equal to or less than a predefined value, said random access preamble transmission having a higher priority compared with a transmission priority of said packet.

6. The method of claim 5, wherein said reducing and scaling linear transmission power is performed over a period of one subframe.

7. The method of claim 1, wherein a first cell group is out of sync when said random access preamble is transmitted on said first cell group.

8. The method of claim 1, wherein a transmission period of said random access preamble is more than one subframe.

9. The method of claim 1, wherein a transmission period of said random access preamble overlaps a first subframe and a second subframe.

10. The method of claim 1, wherein said wireless device transmits each of the following in parallel only if they are transmitted on different cell groups:

a) said random access preamble;

b) said first control packet; and

c) a sounding reference signal.

11. The method of claim 1, wherein said wireless device transmits each of the following in parallel only if they are transmitted on different cell groups:

a) said random access preamble;

b) said third data packet; and

c) a sounding reference signal.

16. The method of claim 1, wherein said wireless device transmits each of the following in parallel only if they are transmitted on different cell groups:

a) said random access preamble;

b) said third data packet; and

c) a sounding reference signal.

12. A method comprising:

a) receiving, by a wireless device, at least one control message from a base station, said at least one control message causing in said wireless device;

i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and

ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups; and

b) receiving, by said wireless device, a control command for transmission of a random access preamble on a first cell in said plurality of cells, a fourth packet being scheduled for parallel uplink transmission with said random access preamble transmission, said fourth packet being any one of the following packets;

i) a first control packet on an uplink control channel of said primary cell;

ii) a second packet comprising uplink control information on an uplink data channel of one of said plurality of cells; and

iii) a third packet on an uplink data channel of said plurality of cells; and

c) transmitting, by said wireless device, said random access preamble; and

d) transmitting, by said wireless device, said fourth packet in parallel with said random access preamble, unless said random access preamble and said fourth packet are scheduled for transmission in the same cell group.

13. The method of claim 12, wherein said plurality of cell groups comprise:

a) a primary cell group comprising said primary cell; and

b) a secondary cell group comprising a subset of said at least one secondary cell.

14. The method of claim 12, wherein a transmission period of said random access preamble overlaps a first subframe and a second subframe.

15. The method of claim 12, wherein said wireless device transmits each of the following in parallel only if they are transmitted on different cell groups:

a) said random access preamble;

b) said first control packet; and

c) a sounding reference signal.

17. 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 at least one control message causing in said wireless device;

(1) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and

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

ii) receive a control command for transmission of a random access preamble on a first cell in said plurality of cells, a fourth packet being scheduled for parallel uplink transmission with said random access preamble transmission, said fourth packet being any one of the following packets;

(1) a first control packet on an uplink control channel of said primary cell;

(2) a second packet comprising uplink control information on an uplink data channel of one of said plurality of cells; and

(3) a third packet on an uplink data channel of said plurality of cells; and

iii) transmit said random access preamble; and

iv) transmit said fourth packet in parallel with said random access preamble, unless said random access preamble and said fourth packet are scheduled for transmission in the same cell group.

18. The wireless device of claim 17, wherein said at least one control message further causes in said wireless device configuration of a plurality of channel parameters for the following channels:

d) said uplink control channel on said primary cell;

e) said at least one uplink data channel; and

f) an uplink random access channel on said first cell.

19. The wireless device of claim 17, wherein said wireless device reduces or scales transmission power of said packet such that a total calculated transmission power is equal to or less than a predefined value.

20. The wireless device of claim 17, wherein transmission power priorities are employed by said wireless device to reduce or scale linear transmission power of said packet such that a total calculated transmission power is equal to or less than a predefined value, said random access preamble transmission having a higher priority compared with a transmission priority of said packet.