Random access method and signaling method for the same

• US 9,655,143 B2
• Filed: 05/10/2016
• Issued: 05/16/2017
• Est. Priority Date: 09/26/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Hyun Hwa, Lee, Hyun Woo, Kim, Dong Cheol, Noh, Min Seok, Han, Seung Hee, Kwon, Yeong Hyeon
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US15/151,239
• Publication Number:
  US 20160255652A1
• Time in Patent Office: 371 Days
• 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 is provided for performing a random access procedure by a Node-B with a specific user equipment (UE) within a cell in which a plurality of UEs are located together. The Node-B transmits a random access procedure configuration including a basic sequence index related with a random access channel and zero correlation zone (ZCZ) configuration. The Node-B receives a random access preamble corresponding to the random access procedure configuration from the UE over the random access channel. A length of a cyclic part and a length of a sequence part of the random access preamble are differently given based on the random access procedure configuration. The random access preamble is generated from Constant Amplitude Zero Auto-Correlation (CAZAC) sequences based on the basic sequence index by applying a length of a cyclic shift according to the ZCZ configuration.

Claims

1. A method for performing a random access procedure by a Node-B with a specific user equipment (UE) within a cell in which a plurality of UEs are located together, the method comprising:

transmitting, by the Node-B, a random access procedure configuration including a basic sequence index related with a random access channel and zero correlation zone (ZCZ) configuration; and

receiving, by the Node-B, a random access preamble corresponding to the random access procedure configuration from the UE over the random access channel, wherein a length of a cyclic part and a length of a sequence part of the random access preamble are differently given based on the random access procedure configuration,

wherein the random access preamble is generated from Constant Amplitude Zero Auto-Correlation (CAZAC) sequences based on the basic sequence index by applying a length of a cyclic shift according to the ZCZ configuration.

2. The method of claim 1, wherein the random access procedure configuration is based on a location of each UE within the cell.

3. The method of claim 1, wherein the random access procedure configuration is transmitted over a broadcast channel (BCH).

4. A Node-B for performing a random access procedure with a specific user equipment (UE) within a cell in which a plurality of UEs are located together, the Node-B comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to;

transmit, via the RF unit, a random access procedure configuration including a basic sequence index related with a random access channel and zero correlation zone (ZCZ) configuration; and

receive, via the RF unit, a random access preamble corresponding to the random access procedure configuration from the UE over the random access channel, wherein a length of a cyclic part and a length of a sequence part of the random access preamble are differently given based on the random access procedure configuration,

wherein the random access preamble is generated from Constant Amplitude Zero Auto-Correlation (CAZAC) sequences based on the basic sequence index by applying a length of a cyclic shift according to the ZCZ configuration.