Method and apparatus for communication of system information in a wireless system

Patent metadata

Field	Value
Publication number	US-10051570-B2
Application number	US-201514934038-A
Country	US
Kind code	B2
Filing date	Nov 5, 2015
Priority date	Nov 6, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A method and apparatus for communicating system information in a wireless communication system is provided. The method comprises generating and sending by a base station, for example an eNB, a system information block (SIB) which includes at least one correlation enhancement bit. This SIB is received by the terminal, for example a MTC UE, and this SIB is subsequently correlated with a previously received SIB. Further, upon the correlation of the SIB and the previously received SIB, a determination is made whether the SIB has in fact changed. Upon determining if the SIB has changed, the terminal selects the correct SIB which is to be used for configuring communication with the base station.

First claim

We claim:

1. A method for communicating system information from a base station to a user equipment (UE) in a wireless network, the method comprising:
generating and sending by the base station, a system information block (SIB) and at least one correlation enhancement bit associated with the SIB;
receiving, by the UE, the SIB;
correlating, by the UE, the SIB with a previously received SIB, wherein correlating the SIB with the previous SIB comprises correlating without decoding over the at least one correlation enhancement bit and at least one previous corresponding correlation enhancement bit of the previously received SIB, and wherein the at least one correlation enhancement bit is configured to produce a low correlation value of said correlating without decoding when content of the SIB differs from content of the previously received SIB, and wherein the at least one correlation enhancement bit is configured to produce a high correlation value of said correlating without decoding when content of the SIB matches content of the previously received SIB;
determining, by the UE, if the SIB has changed based on the correlation; and
selecting, by the UE, a correct SIB for configuring communication with the base station based on the determination.

2. The method according to claim 1 , wherein the at least one correlation enhancement bit is indicated using a sequence positioned adjacent to the SIB.

3. The method according to claim 2 , wherein the sequence is a Pseudo Noise sequence or a Zadoff-Chu sequence.

4. The method according to claim 2 , wherein the sequence comprises a first number of bits and the SIB comprises a second number of bits, wherein the first number of bits is a fraction of the second number of bits.

5. The method according to claim 1 , wherein the at least one correlation enhancement bit includes one or more don't care bits positioned within the SIB.

6. The method according to claim 1 , wherein the at least one correlation enhancement bit includes plural don't care bits spread throughout the SIB.

7. The method according to claim 6 , wherein the plural don't care bits are spread evenly throughout the SIB.

8. The method according to claim 1 , wherein the at least one correlation enhancement bit is also used as a change count associated with the SIB.

9. The method according to claim 8 , wherein the at least one correlation enhancement bit is assigned randomly.

10. The method according to claim 8 , wherein the at least one correlation enhancement bit is a Pseudo Noise sequence or a Zadoff-Chu sequence.

11. The method according to claim 1 , wherein the at least one correlation enhancement bit is included in the SIB.

12. The method according to claim 1 , further comprising decoding the SIB when the SIB is selected as the correct SIB.

13. A method for communicating system information from a base station to a user equipment (UE) in a wireless network, the method comprising:
generating and sending by the base station, a system information block (SIB) including at least one correlation enhancement bit;
receiving, by the UE, the SIB;
correlating, by the UE, the SIB with a previously received SIB;
determining, by the UE, if the SIB has changed based on the correlation; and
selecting, by the UE, a correct SIB for configuring communication with the base station based on the determination,
wherein the previously received SIB includes a first plurality of don't care bits spread throughout the previously received SIB in a first pattern, and wherein the at least one correlation enhancement bit includes a second plurality of don't care bits spread throughout the SIB in a second pattern, wherein the second pattern is assembled to provide low correlation with the first pattern.

14. A base station for communicating system information to a user equipment (UE) in a wireless network, the base station comprising:
a) a generator configured to generate a system information block (SIB) and at least one correlation enhancement bit associated with the SIB; and
b) a transmitter configured to transmit the SIB including at least one correlation enhancement bit to the UE,
wherein the at least one correlation enhancement bit is configured to produce a low correlation value, when subject to a correlation operation by the UE, when content of the SIB differs from content of the previously received SIB, and wherein the at least one correlation enhancement bit is configured to produce a high correlation value, when subject to said correlation operation by the UE, when content of the SIB matches content of the previously received SIB, and
wherein said correlation operation by the UE comprises correlating without decoding over the at least one correlation enhancement bit and at least one previous corresponding correlation enhancement bit of the previously received SIB.

15. The base station according to claim 14 , wherein the at least one correlation enhancement bit is conveyed using a sequence positioned adjacent to the SIB.

16. The base station according to claim 15 , wherein the sequence is a Pseudo Noise sequence or a Zadoff-Chu sequence.

17. The base station according to claim 15 , wherein the sequence comprises a first number of bits and the SIB comprises a second number of bits, wherein the first number of bits is a fraction of the second number of bits.

18. The base station according to claim 14 , wherein the at least one correlation enhancement bit includes one or more don't care bits positioned within the SIB.

19. The base station according to claim 14 , wherein the at least one correlation enhancement bit includes plural don't care bits spread throughout the SIB.

20. The base station according to claim 19 , wherein the plural don't care bits are spread evenly throughout the SIB.

21. The base station according to claim 14 , wherein the at least one correlation enhancement bit is also used as a change count associated with the SIB.

22. The base station according to claim 21 , wherein the at least one correlation enhancement bit is assigned randomly.

23. The base station according to claim 21 , wherein the at least one correlation enhancement bit is a Pseudo Noise sequence or a Zadoff-Chu sequence.

24. A base station for communicating system information to a user equipment (UE) in a wireless network, the base station comprising:
a) a generator configured to generate a system information block (SIB) including at least one correlation enhancement bit; and
b) a transmitter configured to transmit the SIB including at least one correlation enhancement bit to the UE,
wherein a previously transmitted SIB includes a first plurality of don't care bits spread throughout the previously transmitted SIB in a first pattern, and wherein the at least one correlation enhancement bit includes a second plurality of don't care bits spread throughout the SIB in a second pattern, wherein the second pattern is assembled to provide low correlation with the first pattern.

25. A wireless terminal for receiving system information from a base station in a wireless network, the wireless terminal comprising:
a) a reception module configured to receive a system information block (SIB) and at least one correlation enhancement bit associated with the SIB; and
b) a correlating module configured to correlate the SIB with a previously received SIB, wherein correlating the SIB with the previous SIB comprises correlating without decoding over the at least one correl

Assignees

• Sierra Wireless Inc

Inventors

• Vos Gustav Gerald
• Bennett Steven John

Classifications

• H04W48/12

  using downlink control channel · CPC title

• H04W52/0216 Primary

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title

• H04W4/70 Primary

  Services for machine-to-machine communication [M2M] or machine type communication [MTC] · CPC title

• H04W52/0229

  where the received signal is a wanted signal · CPC title

• Y02B60/50

  Cross-Sectional Technologies · mapped topic