METHOD AND DEVICE FOR TRANSMITTING REFERENCE SIGNAL SEQUENCE

• US 20150078328A1
• Filed: 11/21/2014
• Published: 03/19/2015
• Est. Priority Date: 05/23/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Tang, Zhenfei
• Granted Patent: US 9,866,357 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

The present invention provides a method and device for transmitting a reference signal sequence. The method includes: determining a position of an eCCE or an eREG mapped to an ePDCCH in a resource block pair; determining, according to corresponding relationship between the position of the eCCE or the eREG in the resource block pair and the antenna port of the reference signal; and transmitting a reference sequence over the antenna port of the reference signal, herein, the corresponding relationship between the position of the eCCE or the eREG in the resource block pair and the antenna port of the reference signal includes that the positions of at least two eCCEs or at least two eREGs correspond to one of the antenna ports of the reference signal.

Claims

1. A method for transmitting a reference signal sequence at a UE or a base station serving the UE, comprising:

determining a position of an enhanced control channel element (eCCE) or an enhanced resource element group (eREG) mapped to an enhanced physical downlink control channel (ePDCCH) in a resource block pair;

determining, according to a corresponding relationship between a position of the eCCE or the eREG in the resource block pair and an antenna port of the reference signal, the antenna port of the reference signal, wherein the corresponding relationship between the position of the eCCE or the eREG in the resource block pair and the antenna port of the reference signal comprises that the positions of at least two eCCEs or at least two eREGs correspond to one of antenna ports of the reference signal; and

transmitting a reference signal sequence over the antenna port of the reference signal.

2. The method according to claim 1, wherein the determining the position of the eCCE or the eREG mapped to the ePDCCH in the resource block pair comprises:

determining a serial number of the eCCE or the eREG mapped to the ePDCCH in the resource block pair.

3. The method according to claim 2, wherein the corresponding relationship between the position of the eCCE or the eREG in the resource block pair and the antenna port of the reference signal comprises:

in a case of an extended cyclic prefix (CP), the eCCE or eREG of which the serial number is an even number corresponds to an antenna port 7, the eCCE or eREG of which the serial number is an odd number corresponds to an antenna port 8;

or, in the case of the extended CP, the eCCE or eREG of which the serial number is an even number corresponds to the antenna port 8, the eCCEs or eREGs of which the serial number is an odd number correspond to the antenna port 7.

4. The method according to claim 2, wherein the corresponding relationship between the position of the eCCE or the eREG in the resource block pair and the antenna port of the reference signal comprises:

in a case of an extended cyclic prefix (CP), the eCCE or eREG of which the serial number is 1 to n corresponds to an antenna port 7, and the eCCE or eREGs of which the serial number is n−

1 to N corresponds to an antenna port 8;

or in the case of the extended CP, the eCCE or eREG of which the serial number is 0 to n corresponds to the antenna port 8, and the eCCE or eREG of which the serial number is n−

1 to N corresponds to the antenna port 7;

wherein N is a total number of the eCCEs or eREGs, n is a positive integer greater than or equal to 1 and less than or equal to N.

5. The method according to claim 1, before transmitting the reference signal sequence over the antenna port of the reference signal, further comprising:

determining, according to a corresponding relationship between the position of the eCCE or the eREG in the resource block pair and an initialization parameter of a quasi-random sequence, the initialization parameter of the quasi-random sequence;

determining, according to the initialization parameter of the quasi-random sequence, the reference signal sequence.

6. The method according to claim 5, wherein determining, according to the initialization parameter of the quasi-random sequence, the reference signal sequence, comprises:

determining an initialization value of the quasi-random sequence according to c_init=(└

n_s/2 j+1)×

(2X+1)×

2¹⁶+n_SCID, wherein c_init is the initialization value of the quasi-random sequence, n_s is a slot number;

n_SCID is a scrambling identifier;

n_SCID and/or X is the initialization parameter of the quasi-random sequence;

determining the quasi-random sequence corresponding to the initialization value of the quasi-random sequence according to the initialization value of the quasi-random sequence;

determining the reference signal sequence according to the quasi-random sequence.

7. A device for transmitting a reference signal sequence, comprising:

a first determining unit, configured to determine a position of an enhanced control channel element (eCCE) or an enhanced resource element group (eREG) mapped to an enhanced physical downlink control channel (ePDCCH) in a resource block pair;

a second determining unit, configured to determine, according to a corresponding relationship between the position of the eCCE or the eREG in the resource block pair and an antenna port of the reference signal, the antenna port of the reference signal, wherein the corresponding relationship between the position of the eCCE or the eREG in the resource block pair and the antenna port of the reference signal comprises that the positions of at least two eCCEs or at least two eREGs correspond to one of antenna ports of the reference signal; and

a transmitting unit, configured to transmit a reference signal sequence over the antenna port of the reference signal.

8. The device according to claim 7, wherein the first determining unit is specifically configured to determine a serial number of the eCCE or the eREG mapped to the ePDCCH in the resource block pair.

9. The device according to claim 7, wherein the device for transmitting the reference signal sequence further comprises:

a third determining unit, configured to determine, according to a corresponding relationship between the position of the eCCE or the eREG in the resource block pair and an initialization parameter of a quasi-random sequence, the initialization parameter of the quasi-random sequence;

a forth determining unit, configured to determine the reference signal sequence according to the initialization parameter of the quasi-random sequence.

10. The device according to claim 9, wherein the forth determining unit comprises:

a fifth determining unit, configured to determine an initialization value of the quasi-random sequence according to c_init=(└

n_s/2┘

+1)×

(2X+1)×

2¹⁶+n_SCID, wherein, c_init is the initialization value of the quasi-random sequence, n_s is a slot number;

n_SCID is a scrambling identifier;

n_SCID and/or X is the initialization parameter of the quasi-random sequence;

a sixth determining unit, configured to determine the quasi-random sequence corresponding to the initialization value of the quasi-random sequence according to the initialization value of the quasi-random sequence;

a seventh determining unit, configured to determine the reference signal sequence according to the quasi-random sequence.