METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION FROM RELAY NODE ON BACKHAUL UPLINK

• US 20120069793A1
• Filed: 05/31/2010
• Published: 03/22/2012
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chung, Jae Hoon, Lee, Moon II, Park, Kyu Jin, Moon, Sung Ho, Han, Seung Hee, Kwon, Yeong Hyeon
• Granted Patent: US 8,780,784 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/14 Relay systems
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• 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 2001/0097 Relays
• CPC Class Codes: H04L 27/2605 Symbol extensions, e.g. Zero Tail, Unique Word [UW]
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/04 : Interfaces between hierarchically different network devices

Abstract

According to one embodiment of the present invention, the method for transmitting control information from a relay node to a base station on a backhaul link comprises the steps of: determining whether one time slot of a backhaul uplink subframe from the relay node to the base station is a first type slot having transmitted symbol with guard time set or a second type slot without guard time set; diffusing the control information in a time domain using a first length sequence for the first type slot or a second length sequence for the second type slot; mapping the diffused control information on at least one slot from the first type slot or the second type slot; and transmitting the backhaul uplink subframe having more than one slot from the first type slot or the second type slot wherein the control information is mapped.

Claims

1. A method of transmitting backhaul uplink control information, which is transmitted from a relay node to a base station, comprising the steps of:

determining whether one time slot of a backhaul uplink subframe from the relay node to the base station is a 1^st type slot including a transmission symbol having a guard time set therefor or a 2^rd type slot having no guard time set therefor;

spreading the control information in time domain using a sequence of a 1^st length for the 1^st type slot or a sequence of a 2^nd length for the 2^nd type slot;

mapping the spread control information to at least one of the 1^st type slot and the 2^nd type slot; and

transmitting the backhaul uplink subframe including the at least one of the control information mapped 1^st type slot and the control information mapped 2^nd type slot.

2. The method of claim 1, wherein the sequence of the 1^st length is generated by puncturing sequence element(s) corresponding to the number of transmission symbols having the guard time set therefor in the sequence of the 2^nd length.

3. The method of claim 1, further comprising the steps of:

determining whether the one time slot of the backhaul uplink subframe includes a sounding reference signal (SRS) transmission symbol; and

if the time slot includes the sounding reference signal transmission symbol, puncturing sequence element(s) corresponding to the number of the sounding reference signal transmission symbols in the sequence of the 1^st length and the sequence of the 2^nd length,

wherein the spreading step is performed using the sequence punctured in the puncturing step.

4. The method of claim 1, wherein in accordance with an increase of a bit-width of the control information, the control information is modulated using either a phase or an amplitude or multiplexed on the basis of a slot.

5. The method of claim 1, wherein the control information is transmitted by a transmission period based on HARQ (hybrid automatic repeat request) timing of a backhaul uplink and a backhaul downlink.

6. The method of claim 5, wherein the control information is transmitted by a period amounting to an integer (1 included) multiple of 10 ms or 40 ms.

7. The method of claim 1, wherein the control information comprises at least one selected from the group consisting of a scheduling request, a backhaul downlink channel measurement information and ACK/NACK for a downlink data transmission.

8. A relay node, which transmits backhaul uplink control information to a base station, comprising:

a 1^st receiving module receiving backhaul downlink control information and data from the base station;

a 1^st transmitting module transmitting the backhaul uplink control information and data to the base station;

a 2^nd receiving module receiving access uplink control information and data from a user equipment;

a 2^nd transmitting module transmitting access downlink control information and data to the user equipment; and

a processor connected with the 1^st receiving module, the 2^nd receiving module, the 1^st transmitting module and the 2^nd transmitting module, the processor controlling the relay node including the 1^st receiving module, the 2^nd receiving module, the 1^st transmitting module and the 2^nd transmitting module,

the processor comprising;

a determining module determining whether one time slot of a backhaul uplink subframe transmitted via the 1^st transmitting module is a 1^st type slot including a transmission symbol having a guard time set therefor or a 2^nd type slot having no guard time set therefor;

a spreading module spreading the backhaul uplink control information in time domain using a sequence of a 1^st length for the 1^st type slot or a sequence of a 2^nd length for the 2^nd type slot; and

a mapping module mapping the spread backhaul uplink control information to at least one of the 1^st type slot and the 2^nd type slot,

wherein the processor controls the 1^st transmitting module to transmit the backhaul uplink subframe including the at least one of the backhaul uplink control information mapped 1^st type slot and the backhaul uplink control information matted mapped 2^nd type slot.

9. The relay node of claim 8, wherein the processor is further configured to generate the sequence of the 1^st length by puncturing sequence element(s) corresponding to the number of transmission symbols having the guard time set therefor in the sequence of the 2^nd length.

10. The relay node of claim 8, wherein the determining module is further configured to determine whether the one time slot of the backhaul uplink subframe includes a sounding reference signal (SRS) transmission symbol, wherein if the time slot includes the sounding reference signal transmission symbol, the processor is further configured to puncture sequence element(s) corresponding to the number of the sounding reference signal transmission symbols in the sequence of the 1^st length and the sequence of the 2^nd length, and wherein the punctured sequence is used by the spreading module.

11. The relay node of claim 8, wherein in accordance with an increase of a bit-width of the control information, the processor is further configured to modulate the backhaul uplink control information using either a phase or an amplitude or multiplex the backhaul uplink control information on the basis of a slot.

12. The relay node of claim 8, wherein the processor controls the 1^st transmitting module to transmit the backhaul uplink control information by a transmission period based on HARQ (hybrid automatic repeat request) timing of a backhaul uplink and a backhaul downlink.

13. The relay node of claim 12, wherein the processor controls the 1^st transmitting module to transmit the backhaul uplink control information by a period amounting to an integer (1 included) multiple of 10 ms or 40 ms.

14. The relay node of claim 8, wherein the backhaul uplink control information comprises at least one selected from the group consisting of a scheduling request, a backhaul downlink channel measurement information and ACK/NACK for a downlink data transmission.