Method of providing burst timing for high-speed data transmission in a base station transceiver system of a mobile communication system

Abstract

A method of establishing a supplemental channel (SCH) to provide burst timing for high-speed data transmission in a mobile communication system is disclosed. In the SCH establishing method, a source base station transceiver determines that a traffic burst exists and sends a target base station transceiver a burst request message. The burst request message includes forward and reverse burst timing information and channel use time information, which is determined in consideration of a discontinuous transmission (DTX) mode, in order to reserve necessary resources, when a large amount of high rate data is to be transmitted. Then, the target base station transceiver sends the source base station transceiver a burst response message including information about resources committed to the traffic burst.

1. A method of establishing a supplemental channel (SCH) in a mobile communication system, comprising the steps of:
 determining that a traffic burst exists;  
 sending a target base station transceiver a burst message in order to reserve necessary resources when a large amount of high rate data is to be transmitted, said burst request message being sent by a source base station transceiver, said burst request message further including burst timing information to support a duration and start time of the traffic burst; and  
 sending the source base station transceiver a burst response message including information about resources committed to the traffic burst by the target base station transceiver.  
 
     
     
       2. The method of  claim 1 , wherein the burst request message includes an information field in which a physical channel type is designated, said physical channel type being designated in such a way that an IS-95 standard physical channel is distinguished from a CDMA-2000 physical channel. 
     
     
       3. The method of  claim 2 , wherein the physical channel type designations include a fundamental channel (FCH) and a supplemental channel (SCH) of the IS-95 standard, as well as a fundamental channel (FCH), a dedicated control channel (DCCH), and a supplemental channel (SCH) of the CDMA-2000 standard. 
     
     
       4. The method of  claim 1 , wherein the burst timing information includes:
 a system time at which a forward physical channel is assigned;  
 a system time at which a reverse physical channel is assigned;  
 a field indicating whether a forward SCH is assigned for an infinite period or not;  
 a field indicating whether a reverse SCH is assigned for an infinite period or not;  
 a duration of the forward physical channel; and  
 a duration of the reverse physical channel.  
 
     
     
       5. The method of  claim 4 , wherein the reverse burst timing information additionally includes:
 a begin preamble at which the number of preamble frames on a reverse SCH at the start of transmission;  
 a resume preamble, at which the number of preamble frames on a reverse SCH at the start of retransmission; and  
 a reverse burst DTX duration at which a mobile station stops transmission of a reverse SCH before resuming transmission for a period assigned on the reverse SCH.  
 
     
     
       6. The method of  claim 4 , wherein the physical channel is an SCH or a supplemental code channel (SCCH). 
     
     
       7. The method of  claim 1 , wherein the forward burst timing information includes a forward burst timing information and a reverse burst timing information. 
     
     
       8. The method of  claim 1 , wherein the burst request message includes information about an A 3  interface traffic channel protocol specification, said A 3  interface traffic channel protocol specification having a protocol for high-speed data transmission. 
     
     
       9. The method of  claim 8 , wherein the A 3  traffic channel protocol specification includes an AAL2 (ATM Adaptation Layer 2) protocol for voice service and an AAL5 (ATM Adaptation Layer 5) protocol for transmission of high rate data. 
     
     
       10. A method for assigning a channel when a base station controller receives a burst timing message from a base station transceiver in a mobile communication system, comprising the steps of:
 receiving a burst timing message;  
 reading an action time unit from the burst timing message, if the burst timing message includes forward burst timing information;  
 setting an action time unit in which a physical channel is set up;  
 determining from the burst timing message whether the physical channel is to be assigned for a definite duration or for an indefinite duration;  
 setting a burst duration to a value set in the burst timing message if it is determined that the assignment is for a definite duration;  
 setting a burst duration to be maintained until the physical channel is released or a mobile station state transitions to a dormant state, if it is determined that the assignment is for an indefinite duration; and  
 assigning a prepared forward physical channel at an action start time set by the message.  
 
     
     
       11. A method for assigning a channel when a base station transceiver receives a burst timing message from a base station controller in a mobile communication system, comprising the steps of:
 receiving a burst timing message;  
 reading an action time unit from the burst timing message, if the burst timing message includes reverse burst timing information;  
 setting an action time unit in which a physical channel is set up;  
 determining from the burst timing message whether the physical channel it to be assigned for a definite duration or for an indefinite duration;  
 setting a burst duration to a value set in the burst timing message if it is determined that the assignment is for a definite duration;  
 setting a burst duration to be maintained until the physical channel is released or a mobile station state transitions to a dormant state, if it is determined that the assignment is for an indefinite duration; and  
 reading a reverse discontinuous transmission (DTX) duration field in the burst timing message, said reverse DTX duration field being set for the mobile station;  
 setting a maximum DTX duration of a reverse physical channel;  
 setting a number of preamble frames to be received when the reverse physical channel is assigned;  
 setting a number of preamble frames to be received after a DTX period, said number of preamble frames based on information in the burst timing message; and  
 assigning a prepared reverse physical channel at an action start time set by the message.  
 
     
     
       12. A method of establishing a supplemental channel ( SCH )  in a mobile communication system, comprising the steps of:      determining that a traffic burst exists;        sending toward a target base station a burst request message in order to reserve necessary resources for the traffic burst, said burst request message being sent from the direction of a source base station, and including burst timing information to indicate a duration and start time of the traffic burst; and        sending toward the source base station a burst response message including information about necessary resources committed to the traffic burst, the burst response message being sent from the by the target base station;        wherein the burst timing information includes a forward burst timing information and a reverse burst timing information.     
     
     
       13. The method of  claim 12 , wherein the burst request message includes an information field that is used to designate a physical channel type, said physical channel type being designated in such a way that an IS-   95  standard physical channel is distinguished from a CDMA -   2000  physical channel.   
     
     
       14. The method of  claim 13 , wherein the physical channel type designations designate at least one of a fundamental channel ( FCH ) , and a supplemental channel  ( SCH )  of the IS -   95  standard, as well as a fundamental channel  ( FCH ) , a dedicated control channel  ( DCCH ) , and a supplemental channel  ( SCH )  of the CDMA -   2000  standard.   
     
     
       15. The method of  claim 12 , wherein the burst timing information includes:
   a system time at which a forward physical channel is assigned;        a system time at which a reverse physical channel is assigned;        a duration of the forward physical channel; and        a duration of the reverse physical channel.     
     
     
       16. The method of  claim 15 , wherein the burst timing information additionally includes:
   a begin preamble which is the number of preamble frames on a reverse SCH at the start of transmission;        a resume preamble which is the number of preamble frames on a reverse SCH at the start of retransmission; and        a reverse burst DTX duration at which a mobile station stops transmission of a reverse SCH before resuming transmission for a period assigned on the reverse SCH.     
     
     
       17. The method of  claim 15 , wherein the physical channel is one of an SCH and a supplemental code channel ( SCCH ). 
     
     
       18. The method of  claim 12 , wherein the burst request message includes information about an A 3  interface traffic channel protocol specification, said A 3  interface traffic channel protocol specification having a protocol for high- speed data transmission.   
     
     
       19. The method of  claim 19 , wherein the A 3  interface traffic channel protocol specification includes an AAL 2  ( ATM Adaption Layer  2   )  protocol for voice service and an AAL 5   ( ATM Adaptation Layer  5   )  protocol for transmission of high rate data.   
     
     
       20. A method for assigning a channel when a burst timing message is sent from a direction of a source base station toward a target base station in a mobile communication system, comprising the steps of:
   receiving a burst timing message;        reading an action time unit field from the burst timing message, if the burst timing message includes forward burst timing information;        setting an action time unit for a point of time at which a physical channel is set up;        determining from the burst timing message whether the physical channel is to be assigned for a definite duration or for an indefinite duration;       setting a burst duration to a value set in the burst timing message if it is determined that the assignment is for a definite duration;        setting a burst duration to be maintained until the physical channel is released or a mobile station state transitions to a dormant state, if it is determined that the assignment is for an indefinite duration; and        assigning a prepared forward physical channel at an action start time set by the message.     
     
     
       21. The method of  claim 20 , further comprising the steps of:
   reading a reverse discontinuous transmission  ( DTX )  duration field in the burst timing message, said reverse DTX duration field being set for the mobile station;        setting a maximum DTX duration of a reverse physical channel;        setting a number of preamble frames to be received when the reverse physical channel is assigned; and        setting a number of preamble frames to be received after a DTX period, said number of preamble frames based on information in the burst timing message.     
     
     
       22. A system for establishing a supplemental channel ( SCH )  in a mobile communication system, comprising:      a source base station configured to send a burst request message to a target base station for reserving necessary resources for a traffic burst, when the traffic burst exists, said burst request message including burst timing information indicating a duration and start time of the traffic burst; and        a target base station configured to receive the burst request message, and send a burst response message to the source base station, the burst response message including information about communication resources committed to the traffic burst;        wherein the burst timing information includes a forward burst timing information and a reverse burst timing information.     
     
     
       23. The system of  claim 22 , wherein the burst request message includes an information field that is used to designate a physical channel type, said physical channel type being designated in such a way that an IS-   95  standard physical channel is distinguished from a CDMA -   2000  physical channel.   
     
     
       24. The method of  claim 23 , wherein the physical channel type designations designate at least one of a fundamental channel ( FCH ) , and a supplemental channel  ( SCH )  of the IS -   95  standard, as well as a fundamental channel  ( FCH ) , a dedicated control channel  ( DCCH ) , and a supplemental channel  ( SCH )  of the CDMA -   2000  standard.   
     
     
       25. The method of  claim 22 , wherein the burst timing information includes:
   a system time at which a forward physical channel is assigned;        a system time at which a reverse physical channel is assigned;        a duration of the forward physical channel; and        a duration of the reverse physical channel.     
     
     
       26. The method of  claim 25 , wherein the burst timing information additionally includes:
   a begin preamble which is the number of preamble frames on a reverse SCH at the start of transmission;        a resume preamble which is the number of preamble frames on a reverse SCH at the start of retransmission; and        a reverse burst DTX duration at which a mobile station stops transmission of a reverse SCH before resuming transmission for a period assigned on the reverse SCH.     
     
     
       27. The method of  claim 25 , wherein the physical channel is one of an SCH and a supplemental code channel ( SCCH ). 
     
     
       28. A method of establishing a supplemental channel ( SCH )  in a mobile communication system, comprising the steps of:      determining that a traffic burst exists;        sending a target base station a burst request message in order to reserve necessary resources when a large amount of high rate data is to be transmitted, said burst request message being sent by a source base station, said burst request message further including burst timing information to support a duration and start time of the traffic burst; and        sending the source base station a burst response message including information about resources committed to the traffic burst by the target base station;        wherein the burst timing information includes a forward burst timing information and a reverse burst timing information.