Method for transmitting and receiving system information via a broadcast channel (BCH) and a downlink shared channel (DL — SCH)

• US 8,787,920 B2
• Filed: 10/09/2009
• Issued: 07/22/2014
• Est. Priority Date: 01/31/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young-Dae, Chun, Sung-Duck, Park, Sung-Jun, Yi, Seung-June
• Primary Examiner(s): Magloire, Vladimir
• Assistant Examiner(s): Fang, Keith
• Application Number:
  US12/577,138
• Publication Number:
  US 20100091750A1
• Time in Patent Office: 1,747 Days
• Field of Search: 455412-416, 455446-456
• US Class Current: 455/450
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

A method for exchanging, between a mobile terminal and a base station, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), which are transport channels between the MAC layer and a physical layer. The method includes: receiving a block of first system information from the base station in a predetermined frame of the BCH; and after the block of first system information is received, receiving a first block of second system information from the base station in a predetermined frame of the DL_SCH configured to carry system information and other data, the first block of second system information including schedule information relating to a second block of second system information.

Claims

1. A method for receiving, by a mobile terminal from a base station, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), the BCH and DL_SCH being transport channels between the MAC layer and a physical layer and which are each directly mapped to the BCCH, the method comprising:

receiving a block of first system information from the base station in a predetermined frame of the BCH; and

after the block of first system information is received, receiving a first block of second system information from the base station in a predetermined frame of the DL_SCH configured to carry system information and user traffic, the first block of second system information including schedule information relating to a second block of second system information,

wherein the first block of second system information and the second block of second system information are received via the DL_SCH in accordance with a specific control channel,

wherein the specific control channel indicates frequency and time information via which the first block of second system information and the second block of second system information are received via the DL_SCH, and

wherein the first block of second system information further includes cell access related information.

2. The method of claim 1, further comprising:

after the first block of second system information is received, receiving the second block of second system information from the base station via the DL_SCH in accordance with the schedule information included in the first block of second system information.

3. The method of claim 1, wherein the schedule information includes at least one of periodicity information and mapping information.

4. The method of claim 3, wherein the at least one of periodicity information and mapping information is for receiving the second block of second system information.

5. The method of claim 1, wherein the block of first system information includes at least one of bandwidth information and parameter information on a physical layer.

6. The method of claim 1, wherein the second block of second system information further comprises one of:

common or shared channel related information;

call transmission information;

a cell select related information;

a positioning related information; and

a Multimedia Broadcast Multicast Service (MBMS) related information.

7. The method of claim 1, wherein the DL_SCH supports HARQ (hybrid automatic repeat request) scheme.

8. The method of claim 1, wherein the first block of second system information further includes value tag information.

9. The method of claim 1, wherein the step of receiving a first block of second system information comprises:

periodically receiving the first block of second system information in accordance with a corresponding first predetermined period.

10. The method of claim 9, wherein the step of receiving a block of first system information comprises:

periodically receiving the block of first system information in accordance with a corresponding second predetermined period.

11. The method of claim 1, wherein the step of receiving a first block of second system information comprises:

receiving the first block of second system information at a predetermined time after receiving the block of first system information.

12. The method of claim 1, wherein the each second block of second system information has a corresponding second block period.

13. The method of claim 1, wherein the specific control channel is a L1/L2 control channel.

14. The method of claim 1, wherein the step of receiving a second block of second system information comprises:

receiving plural second blocks of second system information, each second block of second system information being mutually exclusive.

15. The method of claim 1, wherein the cell access related information includes PLMN (Public Land Mobile Network) identity information, tracking area identity information and cell barred information.

16. A method for transmitting, by a base station to at least one mobile terminal, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), the BCH and DL_SCH being transport channels between the MAC layer and a physical layer and which are each directly mapped to the BCCH, the method comprising:

transmitting a block of first system information to the at least one mobile terminal in a predetermined frame of the BCH; and

after the block of first system information is transmitted, transmitting a first block of second system information to the at least one mobile terminal in a predetermined frame of the DL_SCH configured to carry system information and user traffic, the first block of second system information including schedule information relating to a second block of second system information,

wherein the first block of second system information and the second block of second system information are transmitted via the DL_SCH in accordance with a specific control channel,

wherein the specific control channel indicates frequency and time information via which the first block of second system information and the second block of second system information are transmitted via the DL_SCH, and

wherein the first block of second system information further includes cell access related information.

17. The method of claim 16, further comprising:

after the first block of second system information is transmitted, transmitting the second block of second system information to the at least one mobile terminal via the DL_SCH in accordance with the schedule information included in the first block of second system information.

18. The method of claim 16, wherein the schedule information includes at least one of periodicity information and mapping information.

19. The method of claim 18, wherein the at least one of periodicity information and mapping information is for receiving the second block of second system information.

20. The method of claim 16, wherein the block of first system information includes at least one of bandwidth information and parameter information on a physical layer.

21. The method of claim 16, wherein the second block of second system information further comprises one of:

common or shared channel related information;

call transmission information;

a cell select related information;

a positioning related information; and

a Multimedia Broadcast Multicast Service (MBMS) related information.

22. The method of claim 16, wherein the DL_SCH supports HARQ (hybrid automatic repeat request) scheme.

23. The method of claim 16, wherein the first block of second system information further includes value tag information.

24. The method of claim 16, wherein the step of transmitting a first block of second system information comprises:

periodically transmitting the first block of second system information in accordance with a corresponding first predetermined period.

25. The method of claim 24, wherein the step of transmitting a block of first system information comprises:

periodically transmitting the block of first system information in accordance with a corresponding second predetermined period.

26. The method of claim 16, wherein the step of transmitting a first block of second system information comprises:

transmitting the first block of second system information at a predetermined time after transmitting the block of first system information.

27. The method of claim 16, wherein the each second block of second system information has a corresponding second block period.

28. The method of claim 16, wherein the specific control channel is a L1/L2 control channel.

29. The method of claim 16, wherein the step of transmitting a second block of second system information comprises:

transmitting plural second blocks of second system information, each second block of second system information being mutually exclusive.

30. The method of claim 16, wherein the cell access related information includes PLMN (Public Land Mobile Network) identity information, tracking area identity information and cell barred information.