High speed dedicated physical control channel for use in wireless data transmissions from mobile devices

• US 20040085936A1
• Filed: 11/06/2002
• Published: 05/06/2004
• Est. Priority Date: 11/06/2002
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Zhang, Wenfeng, Liu, Jung-Tao, Gopalakrishnan, Nandu
• Granted Patent: US 7,333,457 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04J 13/20 having an orthogonal variable spreading factor [OVSF]
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A wireless data communication system includes a high speed dedicated physical control channel (EU-DPCCH) used with transmissions from a mobile device to support an uplink high speed data channel. In one example the EU-DPCCH has a sub frame structure that is the same as an associated dedicated data channel and a fixed spreading factor. The EU-DPCCH allows communicating control information from the mobile device such as a pilot reference, hybrid automatic repeat request information, and backlog information regarding a buffer of the mobile device.

Claims

1. A method of wireless communication, comprising:

transmitting a data signal having a sub frame structure comprising a number of time slots; and

transmitting control information over a dedicated control channel.

2. The method of claim 1, wherein the control information has the same sub frame structure as the data signal.

3. The method of claim 1, wherein the control information occupies a number of time slots that is the same as a number of time slots occupied by data transmitted over a dedicated data channel that is part of the data signal.

4. The method of claim 1, wherein the dedicated control channel has a fixed spreading factor.

5. The method of claim 1, wherein the dedicated control channel comprises a high speed dedicated control channel.

6. The method of claim 5, including transmitting control information over at least one dedicated physical control channel, at least one dedicated physical data channel and a high speed dedicated physical control channel associated with a high speed downlink shared data channel in the downlink direction, and including multiplexing the channels by allocating the channels between an I and a Q channel such that a load on the I channel is approximately balanced with a load on the Q channel.

7. The method of claim 1, wherein the control information transmitted over the dedicated control channel includes at least a pilot reference, hybrid automatic repeat request information, and mobile device buffer backlog information.

8. A method of wireless communication, comprising:

receiving a data signal having a sub frame structure comprising a number of time slots; and

receiving control information over a dedicated control channel.

9. The method of claim 8, wherein the control information has the same sub frame structure as the data signal.

10. The method of claim 8, wherein the control information occupies a number of time slots that is the same as a number of time slots occupied by data received over a dedicated data channel that is part of the data signal.

11. The method of claim 8, wherein the dedicated control channel has a fixed spreading factor.

12. The method of claim 8, wherein the dedicated control channel comprises a high speed dedicated control channel.

13. The method of claim 12, including receiving control information over at least one dedicated physical control channel, at least one dedicated physical data channel and a high speed dedicated physical control channel associated with a high speed downlink shared data channel in the downlink direction, and including multiplexing the channels by allocating the channels between an I and a Q channel such that a load on the I channel is approximately balanced with a load on the Q channel.

14. The method of claim 8, wherein the control information received over the dedicated control channel includes at least a pilot reference, hybrid automatic repeat request information, and mobile device buffer backlog information.