Random access method and signaling method for the same

• US 8,422,451 B2
• Filed: 01/10/2011
• Issued: 04/16/2013
• Est. Priority Date: 09/26/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Noh, Min Seok, Han, Seung Hee, Kwon, Yeong Hyeon, Park, Hyun Hwa, Lee, Hyun Woo, Kim, Dong Cheol
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US12/987,884
• Publication Number:
  US 20110143744A1
• Time in Patent Office: 827 Days
• Field of Search: 370/329, 370/335, 370/394, 370/447, 370/470, 370/472
• US Class Current: 370/329
• CPC Class Codes: H04J 13/0059 CAZAC [constant-amplitude and zero auto-correlation]
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access

Abstract

A method for generating an iterative sequence and a signal transmission method using the same are disclosed. As the cell size or the distance between a user equipment (UE) and a Node-B increases, the CP is repeated at least one time while the iterative sequence is generated, the CP length and the ZCZ length are adjusted, so that the sequence timing point can be easily detected, orthogonality between sequences is maintained, and the sequences can be clearly distinguished from each other.

Claims

1. A method for transmitting a sequence to a Node-B by a user equipment (UE), the method comprising:

applying a circular shift (CS) with a CS value from among a plurality of CS values to a basic sequence, wherein the basic sequence is generated using a basic sequence index received from the Node-B, and wherein the plurality of CS values are correspond to a multiple of a length related to a ZCZ (Zero Correlation Zone) value; and

transmitting the CS applied basic sequence to the Node-B, wherein the CS applied basic sequence was matched to an extended random access channel structure before the transmission,

wherein a normal random access channel structure and the extended random access channel structure have a cyclic prefix part and a sequence part, and wherein at least one length of the cyclic prefix part and the sequence part of the extended random access channel structure is longer than at least one corresponding length of the cyclic prefix part and the sequence part of the normal random access channel structure.

2. The method according to claim 1, wherein a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence is used as the basic sequence.

3. The method according to claim 1, wherein at least one of the cyclic prefix part and the sequence part of the extended random access channel structure has a repeated structure repeating at least one of the cyclic prefix part and the sequence part of the normal random access channel structure, respectively.

4. The method according to claim 1, wherein a first ratio of the length of the cyclic prefix part of the extended random access channel structure over the length of the cyclic prefix part of the normal random access channel structure are less than a second ratio of the length of the sequence part of the extended random access channel structure over the length of the sequence part of the normal random access channel structure.

5. The method according to claim 1, wherein the length related to the ZCZ value is signaled from the Node-B.

6. The method according to claim 1, wherein the basic sequence is distinguished from each other according to at least one of the CS value applied to the each of the basic sequences and the basic sequence index.

7. A user equipment (UE) for transmitting sequence to a Node-B, the UE comprising:

a processor for applying a circular shift (CS) with a CS value from among a plurality of CS values to a basic sequence, wherein the basic sequence is generated using a basic sequence index received from the Node-B, and wherein the plurality of CS values correspond to a multiple of a length related to a ZCZ (Zero Correlation Zone) value; and

a transmitter for transmitting the CS applied basic sequence, applied by the processor, to the Node-B,

wherein the CS applied basic sequence was matched to an extended random access channel structure before the transmission, and

wherein a normal random access channel structure and the extended random access channel structure have a cyclic prefix part and a sequence part, and wherein at least one length of the cyclic prefix part and the sequence part of the extended random access channel structure is longer than at least one corresponding length of the cyclic prefix part and the sequence part of the normal random access channel structure.

8. The UE according to claim 7, wherein a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence is used as the basic sequence.

9. The UE according to claim 7, wherein at least one of the cyclic prefix part and the sequence part of the extended random access channel structure has a repeated structure repeating at least one of the cyclic prefix part and the sequence part of the normal random access channel structure, respectively.

10. The UE according to claim 7, wherein a first ratio of the length of the cyclic prefix part of the extended random access channel structure over the length of the cyclic prefix part of the normal random access channel structure are less than a second ratio of the length of the sequence part of the extended random access channel structure over the length of the sequence part of the normal random access channel structure.

11. The UE according to claim 7, wherein the length related to the ZCZ value is signaled from the Node-B.

12. The UE according to claim 7, wherein the basic sequence is distinguished from each other according to at least one of the CS value applied to the each of the basic sequences and the basic sequence index.