Control signal aggregation in a multi-carrier WCDMA system

• US 9,119,189 B2
• Filed: 04/17/2013
• Issued: 08/25/2015
• Est. Priority Date: 11/09/2009
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Grant, Stephen, Walln, Anders, Wang, Yi-Pin Eric
• Primary Examiner(s): RENNER, BRANDON M
• Application Number:
  US13/865,012
• Publication Number:
  US 20130201952A1
• Time in Patent Office: 860 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04L 1/001 applied to control information
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 5/06 the signals being represented by different frequencies combined with time-division multiplexing H04L5/26
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

Methods and apparatus are disclosed for transmitting data to a remote node via each of two or more transmitted carrier signals, wherein a distinct outbound packet data traffic channel is mapped to each transmitted carrier signal. In an exemplary method, aggregated control channel data is formed by combining control channel data corresponding to each of two or more received carrier signals, simultaneously transmitting traffic channel data to the remote node on each of the two or more outbound packet data traffic channels, and transmitting the aggregated control channel data using one or more physical control channels mapped to a first one of the transmitted carrier signals. In particular, these methods and apparatus may be applied to a multi-carrier High-Speed Packet Access (HSPA) system.

Claims

1. A method in a wireless transceiver for transmitting data to a remote node via each of two or more transmitted carrier signals, wherein a distinct outbound packet data traffic channel is mapped to each transmitted carrier signal, the method comprising:

forming aggregated control channel data by combining first control channel data corresponding to a first received carrier signal with second control channel data corresponding to a second received carrier signal, wherein a distinct inbound packet data traffic channel is mapped to each of the first and second received carrier signals;

simultaneously transmitting traffic channel data to the remote node on each of the two or more outbound packet data traffic channels; and

transmitting the aggregated control channel data using one or more physical control channels only on a first one of the transmitted carrier signals.

2. The method of claim 1, wherein the first and second control channel data comprise one or more control channel data types selected from the group consisting of:

power control commands corresponding to each of the first and second received carrier signals;

absolute grant data corresponding to each of the first and second received carrier signals, the absolute grant data indicating a maximum data rate for transmission on the inbound packet data traffic channel for the corresponding received carrier signal;

relative grant data corresponding to each of the first and second received carrier signals, the relative grant data indicating a change in data rate for transmission on the inbound packet data traffic channel for the corresponding received carrier signal;

acknowledgement data, negative acknowledgement data, or both, corresponding to packet data received on the inbound packet data traffic channels for each of the first and second received carrier signals; and

channel quality data corresponding to each of the first and second received carrier signals.

3. The method of claim 1, wherein forming aggregated control channel data further comprises combining third and fourth control channel data with the first and second control channel data, the third and fourth control channel data corresponding to the first one of the transmitted carrier signals and a second one of the transmitted carrier signals, respectively.

4. The method of claim 3, wherein the third and fourth control channel data comprise one or more control channel data types selected from the group consisting of:

transmit buffer status data corresponding to the outbound packet data traffic channels for each of the first and second transmitted carrier signals;

automatic repeat request process data corresponding to the outbound packet data traffic channels for each of the first and second ones of the transmitted carrier signals; and

transport format data corresponding to the outbound packet data traffic channels for each of the first and second ones of the transmitted carrier signals.

5. The method of claim 1, further comprising transmitting a pilot channel via each of the transmitted carrier signals.

6. The method of claim 1, wherein transmitting the aggregated control channel data using one or more physical control channels mapped to the first one of the transmitted carrier signals comprises time-division multiplexing the first and second control channel data by mapping the bits of the first and second control channel data to time slots of the first one of the transmitted carrier signals according to a pre-determined mapping pattern that associates one or more time slots to control data for each of the first and second received carrier signals.

7. The method of claim 1, wherein combining the first control channel data with the second control channel data comprises:

masking a first error-detecting code generated from the first control channel data with a first radio identifier corresponding to the remote node;

masking a second error-detecting code generated from the second control channel data with a second radio identifier corresponding to the remote node and differing from the first radio identifier; and

including the masked first and second error-detecting codes among the aggregated control channel data.

8. The method of claim 1, wherein combining the first control channel data with the second control channel data comprises time-division multiplexing the first and second control channel data using first and second subframes of the first one of the transmitted carrier signals.

9. The method of claim 1, wherein combining the first control channel data with the second control channel data comprises code-division multiplexing the first and second control channel data using first and second channelization codes, respectively.

10. A wireless transceiver comprising a transmitter circuit configured to transmit data to a remote node via two or more distinct outbound packet data channels mapped to corresponding transmitted carrier signals, a receiver circuit configured to receive first and second distinct inbound packet data traffic channels mapped respectively to first and second received carrier signals, and a control circuit configured to:

form aggregated control channel data by combining first control channel data corresponding to the first received carrier signal with second control channel data corresponding to the second received carrier signal;

simultaneously transmit traffic channel data to the remote node on each of the two or more outbound packet data traffic channels, via the transmitter circuit; and

transmit the aggregated control channel data using one or more physical control channels only on a first one of the transmitted carrier signals, using the transmitter circuit.

11. The wireless transceiver of claim 10, wherein the first and second control channel data comprise one or more control channel data types selected from the group consisting of:

power control commands corresponding to each of the first and second received carrier signals;

absolute grant data corresponding to each of the first and second received carrier signals, the absolute grant data indicating a maximum data rate for transmission on the inbound packet data traffic channel for the corresponding received carrier signal;

relative grant data corresponding to each of the first and second received carrier signals, the relative grant data indicating a change in data rate for transmission on the inbound packet data traffic channel for the corresponding received carrier signal;

acknowledgement data, negative acknowledgement data, or both, corresponding to packet data received on the inbound packet data traffic channels for each of the first and second received carrier signals; and

channel quality data corresponding to each of the first and second received carrier signals.

12. The wireless transceiver of claim 10, wherein the control circuit is configured to form aggregated control channel data by further combining third and fourth control channel data with the first and second control channel data, the third and fourth control channel data corresponding to the first one of the transmitted carrier signals and a second one of the transmitted carrier signals, respectively.

13. The wireless transceiver of claim 12, wherein the third and fourth control channel data comprise one or more control channel data types selected from the group consisting of:

transmit buffer status data corresponding to the outbound packet data traffic channels for each of the first and second transmitted carrier signals;

automatic repeat request process data corresponding to the outbound packet data traffic channels for each of the first and second ones of the transmitted carrier signals; and

transport format data corresponding to the outbound packet data traffic channels for each of the first and second ones of the transmitted carrier signals.

14. The wireless transceiver of claim 10, wherein the transmitter circuit is further configured to transmit a pilot channel via each of the transmitted carrier signals.

15. The wireless transceiver of claim 10, wherein the control circuit is configured to transmit the aggregated control channel data using one or more physical control channels mapped to the first one of the transmitted carrier signals, using the transmitter circuit, by time-division multiplexing bits of the first and second control channel data to time slots of the first one of the transmitted carrier signals according to a pre-determined mapping pattern that associates one or more of the time slots to control data for each of the first and second received carrier signals.

16. The wireless transceiver of claim 10, wherein the control circuit is configured to combine the first control channel data with the second control channel data by:

masking a first error-detecting code generated from the first control channel data with a first radio identifier corresponding to the remote node;

masking a second error-detecting code generated from the second control channel data with a second radio identifier corresponding to the remote node and differing from the first radio identifier; and

including the masked first and second error-detecting codes among the aggregated control channel data.

17. The wireless transceiver of claim 10, wherein the control circuit is configured to combine the first control channel data with the second control channel data by code-division multiplexing the first and second control channel data using first and second channelization codes, respectively.

18. The wireless transceiver of claim 10, wherein the control circuit is configured to combine the first control channel data with the second control channel data by time-division multiplexing the first and second control channel data using first and second subframes of the first one of the transmitted carrier signals.