METHOD FOR ALLOCATING PHICH AND GENERATING REFERENCE SIGNAL IN SYSTEM USING SINGLE-USER MIMO BASED ON MULTIPLE CODEWORDS WHEN TRANSMITTING UPLINK

• US 20130336256A1
• Filed: 07/10/2013
• Published: 12/19/2013
• Est. Priority Date: 07/22/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: CHUNG, Jae Hoon, KIM, So Yeon, KWON, Yeong Hyeon, KO, Hyun Soo, HAN, Seung Hee, LEE, Moon II
• Granted Patent: US 9,729,288 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network

Abstract

The present invention relates to a method for generating an uplink reference signal in a system supporting plural uplink-access transmission modes. The method comprises: a step for transmitting the reference signal configuration information about the configuration of a reference signal from a base station to a user device through an uplink grant PDCCH (Physical Downlink Control Channel), and a step for receiving from the user device a sub-frame including the reference signal that is generated based on the reference signal configuration information. The reference signal configuration information is prepared for plural uplink access transmission modes and includes a cyclic shift value for the sequence of the reference signal. The reference signal is supposed to be transmitted to an uplink, and the user device is set up to be operated in the uplink-access transmission mode that corresponding to the reference signal configuration information.

Claims

1. A method of receiving a Physical Hybrid automatic repeat request Indicator Channel (PHICH) by a user equipment (UE) from a base station, the method comprising:

transmitting multiple units of data to the base station through an uplink resource identified by uplink grant information;

determining PHICH resource to receive the PHICH carrying ACKnowledgement/Negative ACKnowledgement (ACK/NACK) with respect to each of the transmitted units of data, wherein the PHICH resource is identified by a pair of a PHICH group index and an orthogonal sequence index within the PHICH group, wherein the PHICH group index is identified by using a modulo operation having a divisor corresponding to a number of the PHICH group, and wherein a dividend of the modulo operation increases according to each index of the units of data; and

receiving the PHICH from the base station through the determined PHICH resource.

2. The method of claim 1, wherein the dividend of the modulo operation for a second one of the units of data is greater by 1 than the dividend of the modulo operation for a first one of the units of data.

3. The method of claim 1, wherein each of the units of data corresponds to a codeword.

4. The method of claim 1, wherein the multiple units of data are simultaneously transmitted based on the uplink grant information received from the base station within one unit of time.

5. The method of claim 1, wherein the UE operates in a Single-User Multiple Input Multiple Output (SU-MIMO) mode to transmit the multiple units of data.

6. A method of transmitting a Physical Hybrid automatic repeat request Indicator Channel (PHICH) to a user equipment (UE) by a base station, the method comprising:

transmitting an uplink grant signal informing an uplink resource to be used by the UE;

receiving multiple units of data from the UE in response to the uplink grant signal; and

transmitting the PHICH carrying ACKnowledgement/Negative ACKnowledgement (ACK/NACK) with respect to each of the transmitted units of data to the UE through PHICH resource, wherein the PHICH resource is identified by a pair of a PHICH group index and an orthogonal sequence index within the PHICH group, wherein the PHICH group index is identified by using a modulo operation having a divisor corresponding to a number of the PHICH group, and wherein a dividend of the modulo operation increases according to each index of the units of data.

7. The method of claim 6, wherein the dividend of the modulo operation for a second one of the units of data is greater by 1 than the dividend of the modulo operation for a first one of the units of data.

8. The method of claim 6, wherein each of the units of data corresponds to a codeword.

9. The method of claim 6, wherein the multiple units of data are received in response to one uplink grant signal.

10. The method of claim 6, wherein the base station supports the UE operating in a Single-User Multiple Input Multiple Output (SU-MIMO) mode.