Method and apparatus which includes a start of message indicator (SMI) in a 3GPP Down link dedicated physical control channel (DL DPCCH)

• US 6,795,412 B1
• Filed: 09/29/2000
• Issued: 09/21/2004
• Est. Priority Date: 10/02/1999
• Status: Expired due to Term

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae
• Primary Examiner(s): VINCENT, DAVID ROBERT
• Application Number:
  US09/675,149
• Time in Patent Office: 1,453 Days
• Field of Search: 370/310, 370/329, 370/336, 370/335, 370/342, 370/345, 370/347-8, 370/431, 370/437-9, 370/441, 370/442-4, 370/469, 455/403, 455/422, 455/455
• US Class Current: 370/329
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

Method of allocating a common packet which can allocate a correct common packet channel (CPCH), the method including transporting, at a base station (BS), a common packet channel control command (CCC) to a user equipment (UE) through a dedicated physical channel (DPCH) when a power control preamble is transported from the user equipment, and transporting, at the user equipment, a common packet channel message to the base station through the common packet channel when the common packet channel control command is received within a predetermined time, thereby providing stable telecommunication services.

Claims

1. A method of data transmission on a common packet channel (CPCH) for a communication system, comprising:

sending a common packet channel control command (CCC) through a dedicated physical channel (DPCH) when a power control premable is sent; and

sending a common packet channel message through the common packet channel (CPCH) if the common packet channel control command (CCC) is received within a predetermined time.

2. The method of claim 1, wherein the common packet channel control command (CCC) is a message start indicator indicating a start of the common packet channel message between a node and a user equipment.

3. The method of claim 1, wherein the common packet channel control command comprises one of 1 slot, 1 frame and more than 2 frames.

4. The method of claim 2, wherein the message start indicator is sent through a downlink dedicated physical control channel (DL-DPCCH) after transmitting a transport format combination indicator (TFCI) of the power control preamble.

5. The method of claim 1, wherein a field for the common packet channel control command transmitted to the user equipment is used for measurement performing a channel estimation or the power control during a time that the common packet channel control command is not used as a start of message indicator.

6. The method of claim 2, wherein the user equipment sends the common packet channel message to the node when the user equipment received the start of message indicator within the predetermined time.

7. The method of claim 2, wherein the user equipment stops the transmission of the common packet channel message which is sent to the base station when the user equipment does not received the start of message indicator within the predetermined time.

8. The method of claim 1, wherein the DPCH, includes a dedicated physical control channel (DPCCH) for the common packet channel, the DPCCH comprises a pilot field, a transmit power control (TPC) field, a format combination identifier (TFCI), and the common packet channel control command (CCC).

9. The method of claim 8, wherein the pilot field is at least 4 bits (N_pilot) the transmit power control (TPC) field is at least 2 bits (N_TPC), the common packet channel control command (CCC) is at least 4 bits (N_CCC), and the transport format combination identifier (TFCI) is 0 bits (N_TCF).

10. The method of claim 8, wherein the transmit power control (TPC) field, the transport format combination identifier (TFCI), and the common packet channel control command (CCC) are at least 2 bits, and the pilot field is at least 4 bits.

11. The method of claim 1, wherein the transmission of the common packet channel message is stopped if the common packet channel control command is not received.

19. The method of claim 1, wherein the common packet channel control command (CCC) is one of a message start indicator and a higher layer control command.

20. The method of claim 19, wherein the common packet channel control command is used to stop transmission.

21. The method of claim 20, wherein the common packet channel control command comprises 4 bits of [1111].

22. The method of claim 1, wherein the common packet channel control command comprises 4 bits of [1010].

23. The method of claim 1, wherein the common packet channel control command is a start of message indicator, which is sent by a node B layer while a first transport block of the common packet channel message is being sent and allows a user equipment (UE) to know whether or not a correct CPCH channel is being used.

24. The method of claim 23, wherein if the user equipment (UE) does not receive the start of message indicator within the predetermined time, the user equipment (UE) immediately stops the common packet channel message transmission;

otherwise, the user equipment (UE) continues the common packet channel message transmission.

25. The method of claim 24, wherein the power control preamble is sent during a 0 or 8 slot period.

26. The method of claim 1, wherein the common packet channel control command comprises 4 bits, wherein 4 bits is any one of random sequences.

12. A base station, comprising:

means for receiving a power control (PC) preamble; and

means for generating a downlink (DL) dedicated physical control channel (DPCCH) for a common packet channel (CPCH) signaling, wherein the DL DPCCH includes common packet channel control command (CCC) to support the CPCH, wherein the CCC indicates a start of a message through the CPCH.

32. The base station of claim 12, wherein the start of message indicator is sent by the base station while a first transport block of a message is being sent and allows a user equipment (UE) to know whether or not a correct CPCH channel is being used.

33. The base station of claim 32, wherein if the UE does not receive the start of message indicator within a certain period, the UE immediately stops the message transmission;

otherwise, the UE continues the message transmission.

13. A user equipment (UE), comprising:

means for generating a power control (PC) preamble;

means for receiving a downlink (DL) dedicated physical control channel (DPCCH) for a common packet channel (CPCH);

means for detecting a common packet channel control command (CCC) in the DL DPCCH; and

means for transmitting information data through the CPCH upon detection of the CCC.

14. The UE of claim 13, wherein the CPCH is aborted if there is no detection of the CCC, wherein the CCC indicates a start of a message through the CPCH.

27. The user equipment (UE) of claim 13, wherein the common packet channel control command (CCC) is one of a message start indicator information and a higher layer control command.

28. The user equipment (UE) of claim 27, wherein the common packet channel control command is used to stop transmission.

29. The user equipment (UE) of claim 28, wherein the common packet channel control command comprises 4 bits of [1111].

30. The user equipment (UE) of claim 13, wherein the common packet channel control command comprises 4 bits of [1010].

31. The user equipment (UE) of claim 13, wherein the common packet channel control command comprises 4 bits, wherein 4 bits is any one of random sequences.

15. A method for transmitting a packet information through a common packet channel (CPCH), comprising:

initiating procedures to access the CPCH for transmitting the packet data;

detecting a message start indicator from a dedicated physical channel (DPCH) for the CPCH transmitted on a frame by frame basis after power control preamble of the initiation step; and

one of initiating packet information transmission if the message start indicator is detected and stopping an access attempt of the CPCH if the message start indicator is not detected.

16. The method of claim 15, wherein the packet information includes a CPCH message data part and a CPCH message control part.

17. The method of claim 15, wherein the message start indicator is contained in a common packet channel control command of a downlink dedicated physical control channel (DPCCH) of the DPCH.

18. The method of claim 15, wherein the DPCH comprises a dedicated physical data channel (DPDCH) and a dedicated physical control channel (DPCCH), wherein a portion of the DPDCH is used for the start of message indicator.

34. The method of claim 15, wherein the message start indicator is sent by a node B layer while a first transport block of the packet data is being sent and allows a user equipment (UE) to know whether or not a correct CPCH channel is being used.

35. The method of claim 34, wherein if the UE does not receive the message start indicator within a certain period, the UE immediately stops the packet data transmission;

otherwise, the UE continues the packet data transmission.

36. A method of transmitting data on a common packet channel (CPCH) for a communication network including a user equipment (UE) and a node B comprising:

performing at the user equipment a power ramping cycle for an access preamble (AP);

registering an acquisition of the access preamble on an access preamble acquisition indicator channel (AP-AICH);

sending from the user equipment to the node B a collision detection (CD) preamble on a physical common packet channel (PCPCH);

registering reception at the node B of the collision detection preamble on a collision detection indicator channel (CD-ICH);

transmitting from the user equipment to the node B a first transport block of a message through the common packet channel;

sending from the node B to the user equipment a start-of-message indicator (SMI) through a dedicated physical control channel (DPCCH), while the first transport block is being sent from the user equipment to the node B; and

continuing the transmission of the common packet channel message upon reception within a predetermined time of the start-of-message indicator;

otherwise, stopping the transmission of the message.

37. The method of claim 36, wherein the communication network exists between the user equipment (UE) and the node B, wherein the UE includes a UE radio link control (UE-RLC) layer, a UE medium access control (UE-MAC) layer, and a UE-L1 layer, and the node B includes a node B-L1 layer and a node B radio resource control (RRC) layer, and wherein:

a MAC-D-Data-REQ primitive is sent through a dedicated traffic channel (DTCH),

first RRC information relevant for a CPCH status indicator channel (CSICH) is transmitted from the node B-RRC to the UE-L1, a PCPCH status request (REQ) primitive is sent from UE-MAC to UE-L1, second RRC information relevant for the CSICH is transmitted from the node B-RRC to the UE-L1, and a PCPCH status confirmed (CNF) primitive is sent from UE-L1 to UE-MAC,

the UE-MAC executes a persistency check and delay, selects a transport format for requesting CPCH access from the CSICH, and sends a PHY-Access REQ primitive from UE-MAC to UE-L1,

an access preamble (AP) is transmitted, at ramping powers P1 and P2, from UE-L1 to node B-L1 and forwarded to node B-RRC based on a receipt at the UE of an AP-AICH signature generated at node B-RRC and forwarded to UE-L1, wherein said power ramping cycle is performed anew if the AP-AICH signature indicates a no acknowledgment (NAIK) condition;

a collision detection (CD) preamble is transmitted through the PCPCH from UE-L1 to node B-L1 and forwarded to node B-RRC, a CD of CD/CA signature is sent through a collision detection and collision assignment indicator channel (CD/CA-ICH) from node B-RRC to node B-L1 based on a signature of the received CD preamble, wherein said power ramping cycle is performed anew if there is no match for the CD signature;

the UE-MAC selects a transport format to build a CPCH transport block set and then sends a PHY-Data-REQ primitive form UE-MAC to UE-L1.

a closed loop power control (CLPC) preamble is transmitted from UE-L1 to node B-L1 and a corresponding transmit power control (TCP) preamble is transmitted from node B-L1 to UE-L1,

a CPCH control command containing the SMI is transmitted through a dedicated physical channel (DPCH) from node B-L1 to UE-L1, and a PHY-STATUS-IND primitive is sent from UE-L1 to UE-MAC to indicate that normal transmission is established, while a first PHY-DATA-IND primitive is sent from a CRNC-MAC-C/SH layer of the communication network and first MAC-DATA-IND primitive is sent to the CRNC-MAC-C-C/SH layer to an SRNC-RLC layer of the communication network, and

for each transport block set, a MAC-DATA-REQ primitive is sent from UE-RLC to UE-MAC and a PHY-DATA-REQ primitive is transmitted from UE-MAC to UE-L1 in the user equipment, and a second PHY-DATA-IND primitive is sent to the CRNC-MAC-C/SH layer and a second MAC-DATA-IND primitive is sent from the CRNC-LMAC-C/SH layer to the SRNC-RLC layer in the node B.