Concurrent decoding of one or more system information blocks (sibs)

Patent metadata

Field	Value
Publication number	US-2017064764-A1
Application number	US-201615221108-A
Country	US
Kind code	A1
Filing date	Jul 27, 2016
Priority date	Aug 27, 2015
Publication date	Mar 2, 2017
Grant date	—

Abstract

Certain aspects relate to methods and apparatus for obtaining system information by an apparatus comprising concurrently maintaining a first buffer for combining multiple transmissions of at least a first type of system information block (SIB) message across different system information (SI) message windows and a second buffer for combining multiple transmissions of at least a second type of SIB message within an SI window, and decoding at least first and second types of SIB messages based on contents in the first and second buffers.

First claim

What is claimed is:

1 . A method for obtaining system information by an apparatus comprising:
concurrently maintaining a first buffer for combining multiple transmissions of at least a first type of system information block (SIB) message across different system information (SI) message windows and a second buffer for combining multiple transmissions of at least a second type of SIB message within an SI window; and decoding at least first and second types of SIB messages based on contents in the first and second buffers.

2 . The method of claim 1 , wherein the at least a first type of SIB message includes the second type of SIB message.

3 . The method of claim 1 , further comprising:
terminating combination of multiple transmissions of the at least a first type of SIB message across different SI message windows if one or more conditions are met.

4 . The method of claim 3 , wherein the one or more conditions comprise at least one of:
successful decoding of a particular type of SIB message; expiration of a SIB modification period; or failure to decode a SIB message within a given time period.

5 . The method of claim 1 further comprising:
maintaining a list indicating one or more SIB message types considered mandatory; and
declaring a SIB decoding error after failing to decode a particular type of SIB message if the particular type of SIB message is indicated as mandatory based on the list.

6 . The method of claim 5 , wherein the one or more SIB message types considered mandatory depend, at least in part, on an operating mode of the apparatus.

7 . The method of claim 1 , wherein:
the first type of SIB message comprises a system information block type 1 (SIB 1 ) message; and the first buffer is used to combine multiple SIB 1 messages across more than an 80 ms window.

8 . The method of claim 1 , wherein:
the first type of SIB message comprises a system information block type 1 (SIB 1 ) message; and further comprising, after successfully decoding a SIB 1 message, employing the first buffer for combining SIB messages of a type other than SIB 1 .

9 . The method of claim 1 , wherein concurrently maintaining a first buffer for combining multiple transmissions of at least a first type of system information block (SIB) message across different system information (SI) message windows and a second buffer for combining multiple transmissions of at least a second type of SIB message within an SI window includes:
concurrently maintaining for combining transmissions of a particular type of SIB message in the first buffer and an un-combined transmission of the particular type of SIB message in the second buffer.

10 . The method of claim 1 , further comprising:
determining which type of SIB message to store for combining in the first buffer based on a priority scheme.

11 . The method of claim 10 , wherein the priority scheme dictates that a type of SIB message of a first priority is stored for combining in the first buffer if:
a type of SIB message of a second priority that is higher than the first priority message has been successfully decoded.

12 . The method of claim 11 , further comprising:
storing one or more SIB messages of a type having the first priority for combining in the first buffer; and storing one or more SIB messages of a type having the second priority for combining in the first buffer regardless of whether the SIB message of the type having the first priority is decoded successfully when the SIB message of the type having the second priority needs to be decoded again.

13 . An apparatus for wireless communications, comprising:
a processing system configured to:
concurrently maintain a first buffer for combining multiple transmissions of at least a first type of system information block (SIB) message across different system information (SI) message windows and a second buffer for combining multiple transmissions of at least a second type of SIB message within an SI window; and
decode at least first and second types of SIB messages based on contents in the first and second buffers.

14 . The apparatus of claim 13 , wherein the at least a first type of SIB message includes the second type of SIB message.

15 . The apparatus of claim 13 , wherein the processing system is further configured to terminate combination of multiple transmissions of the at least a first type of SIB message across different SI message windows if one or more conditions are met.

16 . The apparatus of claim 15 , wherein the one or more conditions comprise at least one of:
successful decoding of a particular type of SIB message; expiration of a SIB modification period; or failure to decode a SIB message within a given time period.

17 . The apparatus of claim 13 , wherein the processing system is further configured to:
maintain a list indicating one or more SIB message types considered mandatory; and declare a SIB decoding error after failing to decode a particular type of SIB message if the particular type of SIB message is indicated as mandatory based on the list.

18 . The apparatus of claim 17 , wherein the one or more SIB message types considered mandatory depend, at least in part, on an operating mode of the apparatus.

19 . The apparatus of claim 13 , wherein:
the first type of SIB message comprises a system information block type 1 (SIB 1 ) message; and the first buffer is used to combine multiple SIB 1 messages across more than an 80 ms window.

20 . The apparatus of claim 13 , wherein:
the first type of SIB message comprises a system information block type 1 (SIB 1 ) message; and wherein the processing system is further configured to, after successfully decoding a SIB 1 message, employing the first buffer for combining SIB messages of a type other than SIB 1 .

21 . The apparatus of claim 13 , wherein concurrently maintaining a first buffer for combining multiple transmissions of at least a first type of system information block (SIB) message across different system information (SI) message windows and a second buffer for combining multiple transmissions of at least a second type of SIB message within an SI window includes:
concurrently maintaining for combining transmissions of a particular type of SIB message in the first buffer and an un-combined transmission of the particular type of SIB message in the second buffer.

22 . The apparatus of claim 13 , wherein the processing system is further configured to determine which type of SIB message to store for combining in the first buffer based on a priority scheme.

23 . The apparatus of claim 22 , wherein the priority scheme dictates that a type of SIB message of a first priority is stored for combining in the first buffer if:
a type of SIB message of a second priority that is higher than the first priority message has been successfully decoded.

24 . The apparatus of claim 23 , wherein the processing system is further configured to:
store one or more SIB messages of a type having the first priority for combining in the first buffer; and store one or more SIB messages of a type having the second priority for combining in the first buffer regardless of whether the SIB message of the type having the first priority is decoded successfully when the SIB message of the type having the second priority needs to be decoded again.

25 . An apparatus for wireless communications, comprising:
mean

Assignees

• Qualcomm Inc

Inventors

• Ke Lei
• Challa Raghu Narayan
• Bhawnani Udayan Murli
• Yin Ning
• Amerga Daniel

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W76/045

  Electricity · mapped topic

• H04W72/10

  Electricity · mapped topic

• H04W72/1231

  Electricity · mapped topic

• H04W76/027 Primary

  Electricity · mapped topic