Apparatus and method for transmitting/receiving a high speed-shared control channel in a high speed downlink packet access communication system

• US 20030123470A1
• Filed: 12/30/2002
• Published: 07/03/2003
• Est. Priority Date: 12/28/2001
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Moon, Yong-Suk, Kim, Hun-Kee, Yoon, Jae-Seung, Lee, Jun-Sung, Kim, No-Sun
• Granted Patent: US 7,426,201 B2
• Time in Patent Office: Days
• US Class Current: 370/437
• CPC Class Codes: H04B 7/2637 for logical channel control
• CPC Class Codes: H04J 13/0044 OVSF [orthogonal variable spreading factor]
• CPC Class Codes: H04J 13/20 having an orthogonal variable spreading factor [OVSF]
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/1803 Stop-and-wait protocols
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0098 Unequal error protection
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/569 of the traffic information

Abstract

An apparatus and method for transmitting/receiving an HS-SCCH in an HSDPA communication system including an HS-DSCH shared among a plurality of UEs and spread with a plurality of channelization codes, and the HS-SCCH for transmitting control information related with the HS-DSCH to enable the UEs to receive the shared channel. In the HS-SCCH transmitting apparatus, the control information is prioritized according to its processing urgency degree. High-priority control information and low-priority control information are generated and encoded in different encoding methods. Then the high-priority control information and the low-priority control information are multiplexed to a control channel signal such that the high-priority control information precedes the low-priority control information.

Claims

1. A control channel transmitting apparatus in a communication system including a shared channel and a control channel, the shared channel being shared among a plurality of UEs (User Equipments) and spread with a plurality of channelization codes, and the control channel transmitting control information related to the shared channel to enable the UEs to receive the shared channel, the apparatus comprising:

a controller for prioritizing the control information according to a processing urgency degree of the control information;

a first control information generator for generating high-priority control information;

a second control information generator for generating low-priority control information;

a first encoder for encoding the high-priority control information in a predetermined first encoding method;

a second encoder for encoding the low-priority control information in a predetermined second encoding method different from the first encoding method; and

a multiplexer (MUX) for multiplexing the high-priority control information and the low-priority control information to a control channel signal such that the high-priority control information precedes the low-priority control information.

2. The control channel transmitting apparatus of claim 1, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a modulation scheme applied to the shared channel.

3. The control channel transmitting apparatus of claim 1, wherein the low-priority control information includes information about a new data indicator indicating whether the user data is initially transmitted or retransmitted on the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ (Hybrid Automatic Repeat reQuest) process ID (Identifier) indicating a number of a logical channel that transmits the user data.

4. The control channel transmitting apparatus of claim 3, wherein when the user data is initially transmitted, the controller controls the redundancy version information not to be generated, and when the user data is retransmitted, the controller controls the transport block set size information not to be generated.

5. The control channel transmitting apparatus of claim 1, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

6. The control channel transmitting apparatus of claim 1, wherein the low-priority control information includes information about a modulation scheme applied to the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

7. The control channel transmitting apparatus of claim 6, wherein when the user data is initially transmitted, the controller controls the redundancy version information not to be generated, and when the user data is retransmitted, the controller controls the transport block set size information not to be generated.

8. The control channel transmitting apparatus of claim 1, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, a modulation scheme applied to the shared channel, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

9. The control channel transmitting apparatus of claim 1, wherein the low-priority control information includes information about the transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

10. The control channel transmitting apparatus of claim 9, wherein when the user data is initially transmitted, the controller controls the redundancy version information not to be generated, and when the user data is retransmitted, the controller controls the transport block set size information not to be generated.

11. A control channel receiving apparatus in a communication system including a shared channel and a control channel, the shared channel being shared among a plurality of UEs (User Equipments) and spread with a plurality of channelization codes, and the control channel transmitting control information related to the shared channel to enable the UEs to receive the shared channel, the apparatus comprising:

a demultiplexer (DEMUX) for receiving a control channel signal and demultiplexing the control channel signal into high-priority control information and low-priority control information according to processing urgency degrees of the control information under a predetermined control;

a first decoder for decoding the high-priority control information in a predetermined first decoding method;

a second decoder for decoding the low-priority control information in a predetermined second decoding method different from the first decoding method; and

a controller for controlling the high-priority control information to be demodulated before the low-priority control information.

12. The control channel receiving apparatus of claim 11, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a modulation scheme applied to the shared channel.

13. The control channel receiving apparatus of claim 11, wherein the low-priority control information includes information about a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ (Hybrid Automatic Repeat reQuest) process ID (Identifier) indicating a number of a logical channel that transmits the user data.

14. The control channel receiving apparatus of claim 13, wherein when the user data is initial transmission data, the controller determines that the low-priority control information includes the transport block set size information.

15. The control channel receiving apparatus of claim 11, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

16. The control channel receiving apparatus of claim 11, wherein the low-priority control information includes information about a modulation scheme applied to the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

17. The control channel receiving apparatus of claim 16, wherein when the user data is initial transmission data, the controller determines that the low-priority control information includes the transport block set size information.

18. The control channel receiving apparatus of claim 11, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, a modulation scheme applied to the shared channel, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

19. The control channel receiving apparatus of claim 11, wherein the low-priority control information includes information about a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

20. The control channel receiving apparatus of claim 19, wherein when the user data is initial transmission data, the controller determines that the low-priority control information includes the transport block set size information.

21. A control channel transmitting method in a communication system including a shared channel and a control channel, the shared channel being shared among a plurality of UEs (User Equipments) and spread with a plurality of channelization codes, and the control channel transmitting control information related to the shared channel to enable the UEs to receive the shared channel, the method comprising the steps of:

prioritizing the control information according to a processing urgency degree of the control information;

generating high-priority control information and encoding the high-priority control information in a predetermined first encoding method;

generating low-priority control information and encoding the low-priority control information in a predetermined second encoding method different from the first encoding method; and

multiplexing the high-priority control information and the low-priority control information to a control channel signal such that the high-priority control information precedes the low-priority control information.

22. The control channel transmitting method of claim 21, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a modulation scheme applied to the shared channel.

23. The control channel transmitting method of claim 21, wherein the low-priority control information includes information about a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ (Hybrid Automatic Repeat reQuest) process ID (Identifier) indicating a number of a logical channel that transmits the user data.

24. The control channel transmitting method of claim 23, further comprising the step of controlling the redundancy version information not to be generated when the user data is initially transmitted, and controlling the transport block set size information not to be generated when the user data is retransmitted.

25. The control channel transmitting method of claim 21, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

26. The control channel transmitting method of claim 21, wherein the low-priority control information includes information about a modulation scheme applied to the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

27. The control channel transmitting method of claim 26, further comprising the step of controlling the redundancy version information not to be generated when the user data is initially transmitted, and controlling the transport block set size information not to be generated when the user data is retransmitted.

28. The control channel transmitting method of claim 21, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, a modulation scheme applied to the shared channel, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

29. The control channel transmitting method of claim 21, wherein the low-priority control information includes information about a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

30. The control channel transmitting method of claim 29, further comprising the step of controlling the redundancy version information not to be generated when the user data is initially transmitted, and controlling the transport block set size information not to be generated when the user data is retransmitted.

31. A control channel receiving method in a communication system including a shared channel and a control channel, the shared channel being shared among a plurality of UEs (User Equipments) and spread with a plurality of channelization codes, and the control channel transmitting control information related to the shared channel to enable the UEs to receive the shared channel, the method comprising the steps of:

receiving a control channel signal and demultiplexing the control channel signal into high-priority control information and low-priority control information according to processing urgency degrees of the control information under a predetermined control;

decoding the high-priority control information in a predetermined first decoding method; and

decoding the low-priority control information in a predetermined second decoding method different from the first decoding method after decoding the high-priority control information.

32. The control channel receiving method of claim 31, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a modulation scheme applied to the shared channel.

33. The control channel receiving method of claim 31, wherein the low-priority control information includes information about a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ (Hybrid Automatic Repeat reQuest) process ID (Identifier) indicating a number of a logical channel that transmits the user data.

34. The control channel receiving method of claim 33, further comprising the step of determining that the low-priority control information includes the transport block set size information when the user data is initial transmission data.

35. The control channel receiving method of claim 31, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

36. The control channel receiving method of claim 31, wherein the low-priority control information includes information about a modulation scheme applied to the shared channel, a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

37. The control channel receiving method of claim 36, further comprising the step of determining that the low-priority control information includes the transport block set size information when the user data is initial transmission data.

38. The control channel receiving method of claim 31, wherein the high-priority control information includes information about a channelization code to spread the shared channel with, a modulation scheme applied to the shared channel, and a new data indicator indicating whether user data is initially transmitted or retransmitted on the shared channel.

39. The control channel receiving method of claim 31, wherein the low-priority control information includes information about a transport block set size of a transport channel mapped to the shared channel, redundancy version information indicating a redundancy bit combination used for retransmitted user data if the user data is retransmitted, and an HARQ Process ID indicating a number of a logical channel that transmits the user data.

40. The control channel receiving method of claim 39, further comprising the step of determining that the low-priority control information includes the transport block set size information when the user data is initial transmission data.