Mechanisms of control hold operation and MAC_ID assignment for CDMA2000 1xEV-DV reverse enhanced high-speed packet data channel

• US 20040196820A1
• Filed: 04/02/2004
• Published: 10/07/2004
• Est. Priority Date: 04/04/2003
• Status: Active Grant

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Cheng, Mark W., Pi, Zhouyue, Hsu, Liangchi
• Granted Patent: US 7,149,203 B2
• Time in Patent Office: Days
• US Class Current: 370/342
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence

Abstract

Disclosed herein are methods and apparatus for incorporation of a Reverse Link Control Hold Mode and MAC_ID assignment in a cdma2000 1xEV-DV communications system. The teachings herein provide for a reverse link Control Hold Mode for a cellular communications system, wherein a mobile station uses an R-PDCH channel with or without an F-PDCH channel being assigned; alternatively, where a mobile station uses a F-PDCH channel without an R-PDCH channel. A medium access control identification code (MAC_ID) assigned by a base station from a MAC_ID space to each one of a plurality of mobile stations; wherein the MAC_ID is assigned in an ascending (or descending) order from the MAC_ID space for a first group of mobile stations, and wherein the MAC_ID is assigned in a descending (or ascending) order from the MAC_ID space for a second group of mobile stations.

Claims

1. A medium access control identification code (MAC_ID) assigned by a base station from a MAC_ID space to each one of a plurality of mobile stations;

wherein the MAC_ID is assigned in an ascending order from the MAC_ID space for a first group of mobile stations, and wherein the MAC_ID is assigned in a descending order from the MAC_ID space for a second group of mobile stations.

2. A medium access control identification code as in claim 1, wherein the first group of mobile stations use a forward link channel.

3. A medium access control identification code as in claim 1, wherein the second group of mobile stations use a reverse link channel.

4. A medium access control identification code as in claim 1, wherein the MAC_ID is assigned in at least one of a forward link allocation channel and a reverse link allocation channel for user traffic identification.

5. A method for transition from a reverse link Control Hold Mode for a cellular communications system comprising a base station in communication with a mobile station, wherein a reverse link data channel is in operation without an assigned Forward Packet Data Channel, the method comprising:

initiating a transition by the mobile station from Control Hold Mode to an active state, by sending a transition mode request;

turning on a rate request channel by the mobile station, the mobile station requesting a reverse link transmission;

monitoring a rate grant channel with the mobile station;

acknowledging the reception of the mode transition request by sending an individual grant to the mobile station from the base station, thereby granting permission to transmit;

transitioning the mobile station to active state upon receipt of the grant, the mobile station starting to transmit on the reverse link data channel in autonomous mode; and

,

commencing monitoring of a Forward Acknowledgement Channel with the mobile station.

6. A method as in claim 5, wherein initiating a transition by the mobile station from the active state comprises:

gating a reverse pilot and a reverse rate request channel;

detecting the transition by the base station;

stopping the transmission on the Forward Acknowledgement Channel;

stopping the monitoring of the reverse link; and

transitioning the mobile station to Control Hold Mode.

7. A method as in claim 6, wherein the base station controls the transition from the active state to Control Hold Mode when the Forward Packet Data Channel is assigned.

8. A method as in claim 5, wherein a reverse rate request channel is gated at a reduced rate of one half or less.

9. A method as in claim 5, wherein the rate of the grant channel is reduced to reduce the mobile station power consumption.

10. A method for transition from a reverse link Control Hold Mode for a cellular communications system comprising a base station in communication with a mobile station, wherein a reverse link data channel is in operation without an assigned Forward Packet Data Channel, the method comprising:

initiating a transition by the base station from Control Hold Mode to an active state by sending a transition mode request;

sending an individual grant via a forward grant channel to the mobile station to initiate the mode transition; and

transitioning the mobile station to the active state.

11. A method for transition from a reverse link Control Hold Mode for a cellular communications system comprising a base station in communication with a mobile station, wherein a reverse link data channel is in operation with an assigned Forward Packet Data Channel, the method comprising:

initiating a transition by the mobile station from Control Hold Mode to an active state, by sending a transition mode request;

sending an acknowledgement on the reverse acknowledgement channel by the mobile station;

turning on a rate request channel by the mobile station, the mobile station requesting a reverse link transmission;

commencing the monitoring of a rate grant channel and a Forward Acknowledgement Channel with the mobile station;

acknowledging the reception of the mode transition request by sending an individual grant to the mobile station from the base station, thereby granting permission to transmit;

commencing continuous transmission by the mobile station on a reverse channel quality indication channel;

turning on a reverse acknowledgement channel;

commencing monitoring of the Forward Packet Data Control Channel; and

,

transitioning the mobile station to active state upon receipt of a control message with specific message type, the mobile station starting to transmit autonomous rate on the reverse link data channel.

12. A method as in claim 11, wherein the reverse channel quality indication channel is gated at a reduced rate of one half or less.

13. A method for transition from a reverse link Control Hold Mode for a cellular communications system comprising a base station in communication with a mobile station, wherein a reverse link data channel is in operation with an assigned Forward Packet Data Channel, the method comprising:

initiating a transition by the base station from Control Hold Mode to an active state by sending a transition mode request;

setting an extended message type identifier indicating that the mobile station is to exit the packet data channel Control Hold Mode;

initiating the mode transition by sending a medium access control identification code by the granting base station via a Forward Packet Data Control Channel to the mobile station;

turning on a Reverse Channel Quality Indication Channel and a Reverse Acknowledgement Channel by the mobile station;

monitoring the Forward Packet Data Control Channel; and

transitioning the mobile station to the active state.