Apparatus and method for establishing uplink synchronization in a wireless communication system

• US 9,854,545 B2
• Filed: 06/08/2015
• Issued: 12/26/2017
• Est. Priority Date: 02/10/2010
• Status: Active Grant

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: GoldPeak Innovations Inc.
• Inventors: Kwon, Kibum, Jung, Myungcheul
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): Truong, Lan Huong
• Application Number:
  US14/733,068
• Publication Number:
  US 20150271770A1
• Time in Patent Office: 932 Days
• CPC Class Codes: H04B 1/7087 Carrier synchronisation aspects
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

Uplink synchronization establishment in a base station which operates a plurality of component carriers according to one embodiment of the present description, is performed in that the base station is connected to a user equipment, sets component carrier aggregation information, generates an uplink timing groups in the set component carrier aggregation, and transmits information on the thus-generated uplink timing groups to the user equipment.

Claims

1. A method for establishing an uplink (UL) synchronization in a wireless communication system by an evolved NodeB (eNB), the method comprising:

transmitting, to a User Equipment (UE), Radio Resource Control (RRC) signaling including a UL timing group information set through a primary Component Carrier (CC), the UL timing group information set comprising one or more UL timing groups, the one or more UL timing groups each comprising one or more UL CCs;

receiving a Random Access Preamble (RAP) through one or more UL CCs, each of the one or more UL CCs transmitting an RAP being set as a delegate CC in the respective UL timing group; and

transmitting a Random Access Response (RAR) including a Timing Advance (TA) value for UL CCs in the respective UL timing group,

wherein each TA value is calculated by the eNB for the respective UL timing group based on the received RAP associated with a delegate CC of the respective UL timing group, and

wherein each TA value is configured to be applied to CCs in the respective UL timing group.

2. A method for establishing an uplink (UL) synchronization by a User Equipment (UE), the method comprising:

receiving a Radio Resource Control (RRC) signaling including a UL timing group information set, which has been set by an evolved NodeB (eNB);

configuring one or more UL timing groups based on the UL timing group information set, the one or more UL timing groups each comprising one or more UL CCs;

transmitting a Random Access Preamble (RAP) through one or more UL CCs, each of the one or more UL CCs transmitting an RAP being set as a delegate CC in the respective UL timing group;

receiving a Random Access Response (RAR) including a Timing Advanced (TA) value for UL CCs in the respective UL timing group, wherein each TA value is transmitted from the eNB for the respective UL timing group based on the transmitted RAP associated with a delegate CC of the respective UL timing group; and

applying each TA value to CCs in the respective UL timing group.

3. A User Equipment (UE) to establish an uplink (UL) synchronization in a wireless communication system, the UE comprising:

a transceiver configured to receive a Radio Resource Control (RRC) signaling including a UL timing group information set, which has been set by an evolved NodeB (eNB);

a controller configured to configure one or more UL timing groups based on the UL timing group information set, the one or more UL timing groups each comprising one or more UL CCs,

wherein the transceiver transmits a Random Access Preamble (RAP) through one or more UL CCs, each of the one or more UL CCs transmitting an RAP being set as a delegate CC in the respective UL timing group, and receives a Random Access Response (RAR) including a Timing Advanced (TA) value for UL CCs in the respective UL timing group,

wherein each TA value is transmitted from the eNB for the respective UL timing group based on the transmitted RAP associated with a delegate CC of the respective UL timing group, and

wherein the controller applies each TA value to CCs in the respective UL timing group.