METHODS FOR TRANSMITTING AND RECEIVING OF CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEMS

• US 20130003639A1
• Filed: 06/21/2012
• Published: 01/03/2013
• Est. Priority Date: 06/21/2011
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: NOH, Tae Gyun, KO, Young Jo, SEO, Bang Won, AHN, Jae Young
• Granted Patent: US 10,009,896 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• 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

Abstract

A method of transmitting and receiving a control channel in a wireless communication system is provided. A base station allocates a data channel to a radio resource, adds start position information of the data channel into a payload of a control channel, and performs signaling for indication information on the start position information added into the payload of the control channel to a terminal. Accordingly, the legacy system and the enhanced system can efficiently transmit a control channel.

Claims

1. A method of transmitting and receiving a control channel, which is performed in a data transmission apparatus, the method comprising:

allocating a data channel to a radio resource;

adding start position information of the data channel into a payload of a control channel; and

signaling indication information on the start position information added into the payload of the control channel.

2. The method of claim 1, wherein the adding of start position information comprises defining a bit field for the start position information in the payload, and adding the start position information into the bit field.

3. The method of claim 1, wherein the adding of start position information comprises adding the start position information into an unused bit field among bit fields of the payload.

4. The method of claim 1, wherein the adding of start position information comprises inserting a CRC value, which is obtained by applying a predefined mask value to CRC of the payload, into the payload according to the start position information.

5. The method of claim 4, wherein the adding of start position information comprises inserting a result of performing a modulo operation using the predefined mask value, an ID of a terminal, and the CRC of the payload, into the payload according to the start position information.

6. The method of claim 5, wherein the data transmission apparatus does not allocate at least one ID equal to a quantity of start position information to another terminal such that the CRC values of the terminal and the other terminal do not overlap.

7. The method of claim 1, wherein the adding of start position information comprises:

additionally allocating different temporary IDs to a terminal according to the start position information;

calculating a CRC value corresponding to the start position information by using the additionally allocated temporary IDs; and

inserting the calculated CRC value into the payload.

8. The method of claim 7, wherein a temporary ID first allocated to the terminal indicates specific start position information, and the start position information is predefined between the base station and the terminal.

9. The method of claim 1, wherein the adding of start position information comprises applying different scrambling sequences to the payload of the control channel according to the start position information.

10. The method of claim 9, wherein each of the scrambling sequences is generated on the basis of different sequence initial values that are predefined between the data transmission apparatus and a terminal according to the start position information.

11. A method of transmitting and receiving a control channel in a wireless communication system including a plurality of data transmission apparatuses, the method comprising:

transmitting, by at least one first data transmission apparatus, a data channel to a terminal; and

transmitting, by a second data transmission apparatus, a control channel to the terminal,

wherein the second data transmission apparatus transmits MBSFN subframe information as information on the at least one first data transmission apparatus.

12. The method of claim 11, wherein the transmitting of a control channel comprises:

defining, by the second data transmission apparatus, a bit field for the MBSFN subframe information in a payload of the control channel; and

adding, by the second data transmission apparatus, bitmap information into the bit field, the bitmap information indicating whether the at least one first data transmission apparatus comprises MBSFN subframe information.

13. A control channel transmission and reception method for transmitting an enhanced downlink physical control channel that is added into a section of a downlink physical data channel and transmitted, the control channel transmission and reception method comprising:

allocating at least one downlink demodulation reference signal to a first symbol other than a second symbol to which a downlink cell-specific reference signal has been allocated, in a subframe, the first symbol being comprised in an frequency domain to which at least one control channel element configuring the enhanced downlink physical control channel has been allocated; and

transmitting the subframe.

14. The control channel transmission and reception method of claim 13, wherein the allocating of at least one downlink demodulation reference signal comprises allocating a control channel element instead of the downlink cell-specific reference signal to the frequency domain to which the at least one control channel element has been allocated, when the subframe is an MBSFN subframe.

15. A control channel transmission and reception method of a data transmission apparatus, the control channel transmission and reception method comprising:

configuring a search space in which an enhanced downlink physical control channel candidate consists of adjacent control channel elements (CCEs), in at least one aggregation level, the enhanced downlink physical control channel denoting a physical control channel that is added into a downlink physical data channel region and transmitted; and

providing information of the configured search space to a terminal.

16. The control channel transmission and reception method of claim 15, wherein the configuring of a search space comprises:

allocating different enhanced downlink physical control channel candidates by aggregation level;

setting a CCE-unit offset between the enhanced downlink physical control channel candidates by aggregation level; and

setting a CCE-unit offset for each terminal by aggregation level.

17. A data channel transmission and reception method of a data transmission apparatus, the data channel transmission and reception method comprising:

configuring a search space by configuring an enhanced downlink physical control channel candidate with distributed control channel elements (CCEs), in at least one aggregation level, the enhanced downlink physical control channel denoting a physical control channel that is added into a downlink physical data channel region and transmitted; and

providing information of the configured search space to a terminal.

18. The data channel transmission and reception method of claim 17, wherein the configuring of a search space comprises setting a CCE-unit offset between the at least one CCE configuring the enhanced downlink physical control channel candidate.

19. A control channel transmission and reception method of a data transmission apparatus, the control channel transmission and reception method comprising:

determining a kind of a control channel for transmitting control information and a transmission type of the control channel according to whether to enable reception of an enhanced downlink physical control channel and fallback control information and control information based on a physical data transmission mode, the enhanced downlink physical control channel denoting a physical control channel that is added into a downlink physical data channel region and transmitted; and

configuring a control channel on the basis of the determined kind and transmission type of the control channel.

20. The control channel transmission and reception method of claim 19, wherein the determining of a kind of a control channel comprises:

determining one of a downlink physical control channel and the enhanced downlink physical control channel as the kind of the control channel; and

determining one of a localized type, in which a search space is configured for control channel elements of the control channel to be adjacent, and a distributed type, in which a search space is configured for the control channel elements to be distributed, as the transmission type of the control channel.