Methods and apparatus for power efficient broadcasting and communication systems

• US 8,934,394 B2
• Filed: 12/12/2012
• Issued: 01/13/2015
• Est. Priority Date: 06/09/2005
• Status: Active Grant

• Current Assignee: Neo Wireless LLC (f/k/a CFIP NCF LLC) (SoftBank Group Corp.)
• Original Assignee: Neocific Incorporated
• Inventors: Huang, Haiming, Li, Xiaodong, Lo, Titus, Li, Kemin
• Primary Examiner(s): Shen, Qun
• Application Number:
  US13/712,848
• Publication Number:
  US 20130121232A1
• Time in Patent Office: 762 Days
• Field of Search: 370/312, 370/337, 370332-334, 455/3.01, 455/179.1, 455/553.1
• US Class Current: 370/312
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 12/1881 with schedule organisation, e.g. priority, sequence management
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/26208 the scheduling operation being performed under constraints
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6582 Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number arrangements where receivers interact with the broadcast H04H20/38
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• 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
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A method and apparatus for content multicasting and broadcasting and data unicasting in a broadband multicarrier wireless communication system. A base station is configured to transmit, and a mobile station is configured to receive, a sequence of consecutive frames. The frames comprise two types: frames containing time-frequency resources for content multicasting and broadcasting via a single frequency network, and frames containing time-frequency resources for data unicasting without the use of a single frequency network. The two types of frames are intermixed in accordance with an intermixing configuration pattern. The intermixing configuration pattern is indicated by a bit-map contained in a scheduling signal.

Claims

1. A receiving method for a mobile station in a multi-cell wireless system using a frame structure, each frame containing a plurality of orthogonal frequency division multiplexing (OFDM) symbols, the method comprising:

receiving a sequence of consecutive frames, the sequence of consecutive frames comprising a plurality of first frames and a plurality of second frames that are intermixed in accordance with an intermixing configuration pattern, each of the first frames containing time-frequency resources used for content multicasting or broadcasting (MB) via a single frequency network (SFN) that is comprised of base stations in multiple cells transmitting the same MB content using OFDM and employing a same time and frequency resource, and each of the second frames containing time-frequency resources used for data unicasting without the use of a SFN;

receiving a scheduling signal containing a bit-map that indicates the intermixing configuration pattern of the received first and second frames by using “

1”

in the bit-map to represent a first frame and a “

0”

in the bit-map to represent a second frame, or a “

1”

in the bit-map to represent a first frame and a “

0”

in the bit-map to represent a second frame; and

utilizing the received bit-map to identify the first and second frames.

2. The method of claim 1, further comprising receiving a scheduling signal containing information indicating a start frame number for the sequence of consecutive frames.

3. The method of claim 1, further comprising receiving a scheduling signal containing an index indicating a modulation and coding scheme (MCS) used for a SFN time-frequency resource.

4. The method of claim 1, further comprising receiving a scheduling signal containing information indicating a length of the sequence of consecutive frames.

5. The method of claim 1, further comprising receiving a scheduling signal containing an MB stream index.

6. The method of claim 1, wherein each of the first frames contains a first region and a second region, the first region preceding the second region in time, wherein:

the first region is used for data transmission without the use of SFN (non-SFN) and the first region comprises a first number of OFDM symbols, wherein the first number applies to each of the first frames; and

the second region is used for MB via SFN (MBSFN) and the second region comprises a second number of OFDM symbols, wherein the second number applies to each of the first frames.

7. The method of claim 6, further comprising receiving a scheduling signal containing an indication identifying the first region or the second region in each of the first frames.

8. The method of claim 6, wherein the first number is 0, 1, or 2.

9. The method of claim 6, wherein the second number is 6, 8 or 12.

10. The method of claim 1, wherein the bit-map contains between 2 and 8 bits.

11. The method of claim 1, wherein the first frames further contain time-frequency resources used for data transmission without the use of a SFN (non-SFN) and the receiver is further configured to receive data application packets, instructions for performing control functions, or both data application packets and instructions for performing control functions in the second frames or in the non-SFN time-frequency resources in the first frames.

12. The method of claim 11, wherein the control functions include security key updating, establishing network connections, paging, providing location updates, facilitating resynchronization, enabling power control, providing notification of data packet arrival, sending uplink data packets, providing channel quality information, or providing statistics on a packet error rate.

13. The method of claim 1, wherein the MB content comprises video, audio, or data.

14. The method of claim 1, wherein the reception employs

orthogonal frequency division multiple access (OFDMA) or frequency division multiple access (FDMA);

and

Time Division Duplexing (TDD) or Frequency Division Duplexing (FDD) technique.

15. A mobile station in a multi-cell wireless system using a frame structure, each frame containing a plurality of orthogonal frequency division multiplexing (OFDM) symbols, the mobile station comprising:

a receiver configured to receive;

a sequence of consecutive frames, the sequence of consecutive frames comprising a plurality of first frames and a plurality of second frames that are intermixed in accordance with an intermixing configuration pattern, each of the plurality of first frames containing time-frequency resources used for content multicasting or broadcasting (MB) via a single frequency network (SFN) that is comprised of base stations in multiple cells transmitting the same MB content using OFDM and employing a same time and frequency resource, and each of the second frames containing time-frequency resources used for data unitcasting without the use of a SFN; and

a scheduling signal containing a bit-map that indicates the intermixing configuration pattern of the received first and second frames by using “

1”

in the bit-map to represent a first frame and a “

0”

in the bit-map to represent a second frame, or a “

1”

in the bit-map to represent a first frame and a “

0”

in the bit-map to represent a second frame; and

a transmitter configured to transmit data packets using time-frequency resources.

16. The mobile station of claim 15, wherein the receiver is further configured to be enabled during some frames and disabled during other frames.

17. The mobile station of claim 15, wherein the receiver is further configured to receive a scheduling signal containing information indicating a start frame number for the sequence of consecutive frames.

18. The mobile station of claim 15, wherein the receiver is further configured to receive a scheduling signal containing an index indicating a modulation and coding scheme (MCS) used for a SFN time-frequency resource.

19. The mobile station of claim 15, wherein the receiver is further configured to receive a scheduling signal containing information indicating a length of the sequence of consecutive frames.

20. The mobile station of claim 15, wherein each of the first frames contains a first region and a second region, the first region preceding the second region in time, wherein:

the first region is used for data transmission without the use of SFN (non-SFN) and the first region comprises a first number of OFDM symbols, wherein the first number applies to each of the first frames; and

the second region is used for MB via SFN (MBSFN) and the second region comprises a second number of OFDM symbols, wherein the second number applies to each of the first frames.

21. The mobile station of claim 20, wherein the receiver further receives a scheduling signal containing an indication identifying the first region or the second region in each of the first frames.

22. The mobile station of claim 15, wherein the receiver is further configured to separate data packets and MB content packets, wherein data packets are input to a data processing unit and MB content packets are stored in a buffer.

23. The mobile station of claim 15, the mobile station further comprises a video decoder and a video display unit.