METHOD OF INDICATING NUMBER OF ANTENNAS IN NETWORK BROADCAST SYSTEM

• US 20100302978A1
• Filed: 05/27/2010
• Published: 12/02/2010
• Est. Priority Date: 05/27/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Bonghoe, Noh, Yujin, Kang, Byeongwoo, Roh, Dongwook, Lee, Daewon
• Granted Patent: US 8,514,745 B2
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data

Abstract

A method for generating a broadcast signal includes forming an information block for transmission, the information block including a first field comprising a plurality of bits configured to impart information to a first group of user equipment (UEs) regarding a first evolved NodeB (eNodeB) transmit antenna configuration. The method further includes generating error detection bits based upon the information block and scrambling the error detection bits using a mask according to a second eNodeB transmit antenna configuration, such that the mask is configured to impart information to a second group of UEs regarding the second eNodeB transmit antenna configuration. The method also includes generating the broadcast signal having the information block and the scrambled error detection bits, and transmitting the generated broadcast signal via a packet broadcast control channel.

Claims

1. A method for generating a broadcast signal, the method comprising:

forming an information block for transmission, the information block comprising a first field comprising a plurality of bits configured to impart information to a first group of user equipment (UEs) regarding a first evolved NodeB (eNodeB) transmit antenna configuration;

generating error detection bits based upon the information block;

scrambling the error detection bits using a mask according to a second eNodeB transmit antenna configuration, wherein the mask is configured to impart information to a second group of UEs regarding the second eNodeB transmit antenna configuration;

generating the broadcast signal comprising the information block and the scrambled error detection bits; and

transmitting the generated broadcast signal via a packet broadcast control channel.

2. The method of claim 1, wherein the first eNodeB transmit antenna configuration is different from the second eNodeB transmit antenna configuration.

3. The method of claim 1, wherein the first eNodeB transmit antenna configuration is substantially the same as the second eNodeB transmit antenna configuration.

4. The method of claim 1,

wherein the second eNodeB transmit antenna configuration is one of a total of three configurations,

wherein the mask corresponds to the one of the total of three configurations,

wherein the first evolved NodeB (eNodeB) transmit antenna configuration is one of a total of four configurations, and

wherein the plurality of bits of the first field define a value corresponding to the one of the total of four configurations.

5. The method of claim 1, wherein the error detection bits define a 16-bit cyclic redundancy check (CRC) and the mask is a CRC mask.

6. The method of claim 1, wherein the plurality of bits of the first field comprises 2 bits for identifying 4 separate antenna configurations of the first eNodeB transmit antenna configuration.

7. The method of claim 1, wherein the information block further comprises a second field configured to impart, to both the first group of UEs and the second group of UEs, information regarding a transmission bandwidth configuration and a third field configured to impart, to both the first group of UEs and the second group of UEs, information regarding a system frame number.

8. A wireless broadcast system, comprising:

a transmitter configured to transmit a generated broadcast signal via a packet broadcast control channel;

a processor configured to;

form an information block for transmission, the information block comprising a first field comprising a plurality of bits configured to impart information to a first group of user equipment (UEs) regarding a first evolved NodeB (eNodeB) transmit antenna configuration;

generate error detection bits based upon the information block;

scramble the error detection bits using a mask according to a second eNodeB transmit antenna configuration, wherein the mask is configured to impart information to a second group of UEs regarding the second eNodeB transmit antenna configuration;

generate the broadcast signal comprising the information block and the scrambled error detection bits; and

cause the transmitter to transmit the generated broadcast signal via the packet broadcast channel.

9. The wireless broadcast system of claim 8, wherein the first eNodeB transmit antenna configuration is different from the second eNodeB transmit antenna configuration.

10. The wireless broadcast system of claim 8, wherein the first eNodeB transmit antenna configuration is substantially the same as the second eNodeB transmit antenna configuration.

11. The wireless broadcast system of claim 8,

wherein the second eNodeB transmit antenna configuration is one of a total of three configurations,

wherein the mask corresponds to the one of the total of three configurations,

wherein the first evolved NodeB (eNodeB) transmit antenna configuration is one of a total of four configurations, and

wherein the plurality of bits of the first field define a value corresponding to the one of the total of four configurations.

12. The wireless broadcast system of claim 8, wherein the error detection bits define a 16-bit cyclic redundancy check (CRC) and the mask is a CRC mask.

13. The wireless broadcast system of claim 8, wherein the plurality of bits of the first field comprises 2 bits for identifying 4 separate antenna configurations of the first eNodeB transmit antenna configuration.

14. The wireless broadcast system of claim 8, wherein the information block further comprises a second field configured to impart, to both the first group of UEs and the second group of UEs, information regarding a transmission bandwidth configuration and a third field configured to impart, to both the first group of UEs and the second group of UEs, information regarding a system frame number.

15. A method of transmitting broadcast channel information to user equipment (UEs), the method comprising:

providing a first reference signal in one of (a) a plurality of first resource elements reserved for a first antenna port or (b) a plurality of second resource elements reserved for a second antenna port, such that the other of (a) the plurality of first resource elements or (b) the plurality of second resource elements are left unused;

providing a second reference signal in a plurality of third resource elements reserved for a third antenna port and in a plurality of fourth resource elements reserved for a fourth antenna port, for indicating control information; and

transmitting the provided first reference signal and the provided second reference signal.

16. The method of claim 15, wherein the control information includes a number of employed antennas ranging from a minimum of 1 to a maximum of 8.

17. The method of claim 15, wherein providing the second reference signal comprises providing the second reference signal across one of the third resource elements and a corresponding one of the fourth resource elements.

18. The method of claim 15, wherein providing the second reference signal comprises providing a QPSK symbol in each of (1) one of the third resource elements and (2) a corresponding one of the fourth resource elements.

19. The method of claim 15, wherein at least one of the plurality of first resource elements and at least one of the plurality of second resource elements correspond to a same subcarrier frequency.