METHOD AND DEVICE FOR TRANSMITTING REFERENCE SIGNAL SEQUENCE

• US 20180102888A1
• Filed: 12/07/2017
• Published: 04/12/2018
• 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 10,454,642 B2
• Time in Patent Office: Days
• 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 application 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 determining an antenna port of a reference signal sequence at a terminal side device or a network side device, comprising:

determining the smallest number of a control channel element mapped to a downlink control channel; and

determining, according to a corresponding relationship between the smallest numbers of control channel elements and antenna ports of the reference signal, an antenna port of the reference signal corresponding to the smallest number of the control channel element mapped to the downlink control channel, wherein in the corresponding relationship there exists that at least two smallest numbers of control channel elements mapped to at least two downlink control channels correspond to one of the antenna ports of the reference signal.

2. The method according to claim 1, wherein the control channel element mapped to the downlink control channel is in a physical resource block (PRB) pair.

3. The method according to claim 1, wherein in a case of an extended cyclic prefix (CP), among the smallest numbers of the control channel elements the even smallest number and the odd smallest number correspond to different antenna ports.

4. The method according to claim 1, further comprising:

determining, according to a corresponding relationship between the smallest number of the control channel element mapped to the downlink control channel and an initialization parameter of a quasi-random sequence, the initialization parameter of the quasi-random sequence; and

determining, according to the initialization parameter of the quasi-random sequence, a reference signal sequence to be transmitted over the determined antenna port of the reference signal between the terminal side device and a network side device.

5. The method according to claim 4, 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┘

+1)×

(2×

+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; and

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

6. A apparatus for determining an antenna port of a reference signal sequence, wherein the apparatus is a terminal side device or a network side device and the apparatus comprises:

a processing circuit and a memory having executable instructions stored therein, when executing the executable instructions, the processing circuit is configured to;

determine the smallest number of a control channel element mapped to a downlink control channel; and

determine, according to a corresponding relationship between the smallest numbers of control channel elements and antenna ports of the reference signal, an antenna port of the reference signal corresponding to the smallest number of the control channel element mapped to the downlink control channel, wherein in the corresponding relationship there exists that at least two smallest numbers of control channel elements mapped to at least two downlink control channels correspond to one of the antenna ports of the reference signal.

7. The apparatus according to claim 6, wherein the control channel element mapped to the downlink control channel is in a physical resource block (PRB) pair.

8. The apparatus according to claim 6, wherein in a case of an extended cyclic prefix (CP), among the smallest number of the control channel elements the even smallest number and the odd smallest number correspond to different antenna ports.

9. The apparatus according to claim 6, wherein the processing circuit is further configured to:

determine, according to a corresponding relationship between the smallest number of the control channel element mapped to the downlink control channel and an initialization parameter of a quasi-random sequence, the initialization parameter of the quasi-random sequence; and

determine, according to the initialization parameter of the quasi-random sequence, a reference signal sequence to be transmitted over the determined antenna port of the reference signal between the terminal side device and a network side device.

10. The apparatus according to claim 9, wherein the determination of the reference signal sequence, comprises:

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

n_s/2┘

+1)×

(2×

+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;

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; and

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

11. A non-transitory readable medium comprising:

a memory having executable instructions stored therein, when the executable instructions is executed to perform the following method;

determining the smallest number of a control channel element mapped to a downlink control channel; and

determining, according to a corresponding relationship between the smallest numbers of control channel elements and antenna ports of the reference signal, an antenna port of the reference signal corresponding to the smallest number of the control channel element mapped to the downlink control channel, wherein in the corresponding relationship there exists that at least two smallest numbers of control channel elements mapped to at least two downlink control channels correspond to one of the antenna ports of the reference signal.

12. The medium according to claim 11, wherein the control channel element mapped to the downlink control channel is in a physical resource block (PRB) pair.

13. The medium according to claim 11, wherein in a case of an extended cyclic prefix (CP), among the smallest number of the control channel elements the even smallest number and the odd smallest number correspond to different antenna ports.

14. The medium according to claim 11, the following method further comprising:

determining, according to a corresponding relationship between the smallest number of the control channel element mapped to the downlink control channel and an initialization parameter of a quasi-random sequence, the initialization parameter of the quasi-random sequence; and

determining, according to the initialization parameter of the quasi-random sequence, a reference signal sequence to be transmitted over the determined antenna port of the reference signal between the terminal side device and a network side device.

15. The medium according to claim 14, 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┘

+1)×

(2×

+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; and

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