Control channel resource transmission method, base station and user equipment

• US 9,571,238 B2
• Filed: 08/08/2014
• Issued: 02/14/2017
• Est. Priority Date: 02/10/2012
• 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: Gao, Chi, Liu, Jianghua, Wu, Qiang
• Primary Examiner(s): Acolatse, Kodzovi
• Application Number:
  US14/455,050
• Publication Number:
  US 20140355559A1
• Time in Patent Office: 921 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Embodiments of the present invention provide a control channel resource transmission method, a base station and a user equipment which can ensure balance between performance of E-CCEs on a resource set, and further ensure scheduling and receiving performance of the E-CCEs. A control channel resource transmission method includes: mapping, by a base station, more than one enhanced control channel element E-CCE onto a resource set, where each E-CCE is mapped onto a corresponding first resource subset and a corresponding second resource subset respectively, so that each E-CCE occupies a resource of the same size or a difference between sizes of resources occupied by the E-CCEs is less than a preset threshold, where the E-CCEs are carried on the resource set for transmission; and transmitting the resource set that carries the E-CCEs to a user equipment; and demodulating, by the user equipment, the resource set and performing receiving.

Claims

1. A control channel resource transmission method, comprising:

mapping more than one enhanced control channel element (E-CCE) onto a resource set, the resource set including a resource block pair in a first slot and a second slot, wherein each E-CCE is mapped onto a first resource subset of the resource set occupying a first time domain symbol set in a time domain of the first slot and a second resource subset of the resource set, wherein the second resource subset of the resource set occupies a second time domain symbol set in the time domain of the second slot and occupies a frequency domain subcarrier set in a frequency domain of the first slot subsequent to a frequency domain subcarrier set occupied by the first resource subset, so that each E-CCE mapped onto the resource set occupies a resource of the same size or a difference between sizes of resources occupied by the E-CCEs is less than a preset threshold, wherein the E-CCEs are carried on the resource set for transmission; and

transmitting the resource set that carries the E-CCEs to a user equipment,

wherein the frequency domain subcarrier set of the first resource subset does not overlap the frequency domain subcarrier set of the second resource subset.

2. The method according to claim 1, wherein the first time domain symbol set of the first resource subset does not overlap the second time domain symbol set of the second resource subset.

3. The method according to claim 1, wherein a number of a subcarrier comprised in the frequency domain subcarrier set of the first resource subset and a number of a subcarriers comprised in the frequency domain subcarrier set of the second resource subset are set respectively according to distribution of a reference signal RS of a current system in the resource set.

4. The method according to claim 1, wherein the transmitting the resource set that carries the E-CCEs to a user equipment comprises:

transmitting, by using space diversity, the resource set that carries the E-CCEs to the user equipment, wherein all the E-CCEs are transmitted by using port 7 and port 9.

5. A control channel resource transmission method, comprising:

demodulating more than one enhanced control channel element (E-CCE) mapped onto a resource set, the resource set including a resource block pair in a first slot and a second slot, wherein the E-CCEs are demodulated on a first resource subset of the resource set occupying a first time domain symbol set in a time domain of the first slot and a second resource subset of the resource set, wherein the second resource subset of the resource set occupies a second time domain symbol set in the time domain of the second slot and occupies a frequency domain subcarrier set in a frequency domain of the first slot subsequent to a frequency domain subcarrier set occupied by the first resource subset, so that each E-CCE mapped onto the resource set occupies a resource of the same size or a difference between sizes of resources occupied by the E-CCEs is less than a preset threshold, wherein the E-CCEs are carried on the resource set for transmission; and

receiving, according to the demodulated E-CCEs, the resource set that carries the E-CCEs and is transmitted by a base station,

wherein the frequency domain subcarrier set of the first resource subset does not overlap the frequency domain subcarrier set of the second resource subset.

6. The method according to claim 5, wherein the first time domain symbol set of the first resource subset does not overlap the second time domain symbol set of the second resource subset.

7. The method according to claim 5, wherein a number of a subcarrier comprised in the frequency domain subcarrier set of the first resource subset and a number of a subcarrier comprised in the frequency domain subcarrier set of the second resource subset are determined respectively according to distribution of a reference signal RS of a current system in the resource set.

8. The method according to claim 5, wherein the receiving, according to the demodulated E-CCEs, the resource set that carries the E-CCEs and is transmitted by a base station, comprises:

receiving, according to the E-CCEs demodulated by using space diversity, the resource set that carries the E-CCEs and is transmitted by the base station, wherein all the E-CCEs are demodulated by using port 7 and port 9.

9. A base station, comprising:

a transmitter; and

a processor configured to;

map more than one enhanced control channel element (E-CCE) onto a resource set, the resource set including a resource block pair in a first slot and a second slot, wherein each E-CCE is mapped onto a first resource subset of the resource set occupying a first time domain symbol set in a time domain of the first slot and a second resource subset of the resource set, wherein the second resource subset of the resource set occupies a second time domain symbol set in the time domain of the second slot and occupies a frequency domain subcarrier set in a frequency domain of the first slot subsequent to a frequency domain subcarrier set occupied by the first resource subset, so that each E-CCE mapped onto the resource set occupies a resource of the same size or a difference between sizes of resources occupied by the E-CCEs is less than a preset threshold,

wherein the E-CCEs are carried on the resource set for transmission, and the transmitter is configured to transmit the resource set that carries the E-CCEs to a user equipment,

wherein the frequency domain subcarrier set of the first resource subset does not overlap the frequency domain subcarrier set of the second resource subset.

10. The base station according to claim 9, wherein the first time domain symbol set of the first resource subset does not overlap the second time domain symbol set of the second resource subset.

11. The base station according to claim 9, wherein a number of a subcarrier comprised in the frequency domain subcarrier set of the first resource subset and a number of a subcarriers comprised in the frequency domain subcarrier set of the second resource subset are set respectively according to distribution of a reference signal RS of a current system in the resource set.

12. The base station according to claim 9, wherein:

the transmitter is configured to use space diversity to transmit the resource set that carries the E-CCEs to the user equipment, wherein all the E-CCEs are transmitted by using port 7 and port 9.

13. A user equipment, comprising:

a receiver; and

a processor configured to;

demodulate more than one enhanced control channel element (E-CCE) mapped onto a resource set, the resource set including a resource block pair in a first slot and a second slot, wherein the E-CCEs are demodulated on a first resource subset of the resource set occupying a first time domain symbol set in a time domain of the first slot and a second resource subset of the resource set, wherein the second resource subset of the resource set occupies a second time domain symbol set in the time domain of the second slot and occupies a frequency domain subcarrier set in the frequency domain of the first slot subsequent to a frequency domain subcarrier set occupied by the first resource subset, so that each E-CCE mapped onto the resource set occupies a resource of the same size or a difference between sizes of resources occupied by the E-CCEs is less than a preset threshold, wherein the E-CCEs are carried on the resource set for transmission, and

wherein the receiver is configured to receive the resource set that carries the E-CCEs and is transmitted by a base station according to the demodulated E-CCEs,

wherein the frequency domain subcarrier set of the first resource subset does not overlap the frequency domain subcarrier set of the second resource subset.

14. The user equipment according to claim 13, wherein the first time domain symbol set of the first resource subset does not overlap the second time domain symbol set of the second resource subset.

15. The user equipment according to claim 13, wherein a number of a subcarrier comprised in the frequency domain subcarrier set of the first resource subset and a number of a subcarrier comprised in the frequency domain subcarrier set of the second resource subset are determined respectively according to distribution of a reference signal RS of a current system in the resource set.

16. The user equipment according to claim 13, wherein:

the processor is configured to demodulate all the E-CCEs by using port 7 and port 9; and

the receiver is configured to receive, according to the E-CCEs demodulated by using space diversity, the resource set that carries the E-CCEs and is transmitted by the base station.