WO2005043794A2 - Transmission of overhead information for reception of multiple data streams - Google Patents
Transmission of overhead information for reception of multiple data streams Download PDFInfo
- Publication number
- WO2005043794A2 WO2005043794A2 PCT/US2004/035005 US2004035005W WO2005043794A2 WO 2005043794 A2 WO2005043794 A2 WO 2005043794A2 US 2004035005 W US2004035005 W US 2004035005W WO 2005043794 A2 WO2005043794 A2 WO 2005043794A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame
- super
- data
- data channel
- location information
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- the wireless device may need to receive the signal transmitted by the base station, process (e.g., downconvert, demodulate, and decode) the received signal to obtain the composite stream sent by the base station, and perform demultiplexing to extract the one or few specific data streams of interest.
- process e.g., downconvert, demodulate, and decode
- This type of processing may not be problematic for receiver units intended to be powered on all the time.
- many wireless devices are portable and powered by internal batteries. Continual demodulation and decoding of the received signal to recover just one or few data streams of interest may consume significant amounts of battery power, which may greatly shorten the "ON" time for the wireless device.
- FIG. 5 shows an exemplary message for carrying location information for multiple MLCs
- a wireless device may also be a portable unit such as a cellular phone, a handheld device, a wireless module, a personal digital assistant (PDA), and so on.
- Each base station may transmit wide-area content, local-area content, or a combination of both. Wide-area content is content sent over a large coverage area (e.g., nationwide), and local-area content is content sent over a smaller coverage area (e.g., citywide). Neighboring base stations may transmit the same or different contents.
- Each base station may also transmit multiple data streams for wide-area and/or local- area contents to wireless devices within its coverage area. These data streams may carry multimedia content such as video, audio, teletext, data, video/audio clips, and so on. The data streams are sent on data channels or MLCs.
- the MAC layer forms a MAC capsule for the MLC for each super-frame in which the MLC is transmitted.
- the MAC capsule includes a MAC capsule header and a MAC capsule payload.
- the MAC capsule header carries embedded overhead information for the MLC, which may be used to receive the MLC in a future (e.g., the next) super-frame.
- the MAC capsule payload carries the stream layer packets to be sent in the current super-frame for the data streams carried by the MLC.
- the MAC layer forms No MAC layer packets (or simply, MAC packets) for the MAC capsule header and stream 0 packet, Ni MAC packets for stream 1 packet, and N 2 MAC packets for stream 2 packet, where N 0 > 1 , N j > 1 , and N 2 > 1 if all three data streams are being sent.
- each stream layer packet is sent in an integer number of MAC packets, and the length of each stream layer packet is included in the overhead information.
- Each MLC may be "allocated" a fixed or variable number of slots in each super-frame depending on the MLCs payload, the availability of slots in the super- frame, and possibly other factors.
- Each "inactive" MLC which is an MLC that is not transmitted in a given super-frame, is allocated zero slots.
- Each "active” MLC, which is an MLC to be transmitted in a given super-frame is allocated at least one slot.
- FIG. 4 shows an exemplary slot assignment scheme that assigns slots to MLCs using a "sinusoidal" or "zigzag” pattern.
- a frame is divided into one or more "strips", and each strip spans at least one slot index and further spans a contiguous number of (e.g., all) symbol periods in the frame.
- Each active MLC is mapped to one strip and is assigned slots in that strip.
- the slots in each strip may be assigned to the MLCs mapped to that strip in a specific order using a vertical zigzag pattern. This zigzag pattern selects slots from the lowest slot index for the strip to the highest slot index for the strip, one symbol period at a time, starting with the first symbol period for the strip.
- the message header may carry information such as, for example, (1) the system time for the beginning of the current super-frame, (2) a network identifier, (3) the source of the message, (4) a protocol version supported by the system, (5) transmission parameters for a control channel (described below), (6) the MLC for the first location record sent in the message right after the header, (7) the number of location records (N rec ) being sent in the message, and so on.
- the message header may contain any pertinent information for the wireless devices.
- the message carries N rec location records for N rec MLCs after the message header, one location record for each MLC, where N rec > 1.
- An encoded MAC capsule is transmitted in the current super-frame for each active MLC.
- the encoded MAC capsule is partitioned into four equal-sized portions, and each portion is further processed and transmitted in one frame on the slots assigned to the MLC.
- the transmission of the encoded MAC capsule over four frames provides time diversity and robust reception performance in a slowly time- varying fading channel.
- the same slot assignment may be used for the four frames of the super-frame, as shown in FIG. 6, and this slot assignment is conveyed in the location record for that MLC.
- the MAC capsule header further contains a Next SF Start Offset field, a Next SF Slot Info field, and a Next SF Stream Lengths field, which carry the same type of information as the Start Offset, Slot Info, and Stream Lengths fields, respectively, in the location record.
- the Start Offset, Slot Info, and Stream Lengths fields in the location record carry "current" overhead information for MLC x for the current super-frame.
- the Next SF Start Offset, Next SF Slot Info, and Next SF Stream Lengths fields in the MAC capsule header carry "future" overhead information for MLC x for the next super-frame.
- a wireless device that has just powered on or has just switched to a new MLC may receive the composite overhead information sent at the start of each super-frame and determine the location where the new MLC will be sent in the current super-frame. The wireless device may then receive the MAC capsule for this new MLC at the location indicated by the location record for the MLC. The wireless device may obtain from the MAC capsule header the embedded overhead information for this MLC for the next super-frame. The wireless device may then use this embedded overhead information to receive the MLC in the next super-frame, without having to process the composite overhead information sent at the start of the next super-frame.
- FIG. 7 shows a process 700 for transmitting overhead information for multiple data channels or MLCs.
- the location information for each MLC for the current super- frame is determined (e.g., block 712).
- the composite overhead information is sent periodically at the start of each super-frame (which may be relatively infrequently, e.g., once every second) and conveys the slot assignments for all MLCs sent in that super-frame.
- a wireless device may use the composite overhead information if it is requesting content for the first time (e.g., after powering on), if an MLC of interest was decoded in error in a previous super-frame, if the wireless device is receiving a new MLC, if the wireless device switches reception from a current MLC to a new MLC, and so on. [0058]
- a wireless device may use the embedded overhead information to determine when to wake up in the next super-frame.
- the embedded overhead information is protected by the same error-correction coding used for the payload of the MLC, which ensures robust reception of the embedded overhead information.
- the super-frame duration may be selected such that the composite and embedded overhead information consumes a relatively small percentage of the total system capacity while still allowing for fast changes between data channels.
- the partitioning of the composite overhead information into wide-area and local-area portions also provides several benefits.
- the overhead data bits for the wide-area portion may be sent in a manner to obtain the benefits of using OFDM in a single- frequency network (SFN). For example, a wireless device may receive and combine the overhead data bits from multiple base stations to obtain greater reception reliability.
- SFN single- frequency network
- the overhead data bits for the local-area portion may be transmitted differently than those for the wide-area portion, e.g., using a different OFDM pilot structure, a lower code rate, a lower order modulation scheme, and so on, in order to improve reception of these bits at the boundaries of the local coverage areas.
- the wide-area and local-area portions may be processed with the same or different coding and modulation schemes, may have the same or different formats and lengths, and so on.
- the overhead information is processed and transmitted to be as robust as the fraffic data.
- a data symbol is a modulation symbol for packet/traffic data
- an overhead symbol is a modulation symbol for overhead data
- a pilot symbol is a modulation symbol for pilot (which is data that is known a priori by both the base station and wireless devices)
- a guard symbol is a signal value of zero
- a modulation symbol is a complex value for a point in a signal constellation used for a modulation scheme (e.g., M-PSK, M-QAM, and so on).
- Controller 940 then provides a control signal to dechannelizer 920.
- Dechannelizer 920 performs demultiplexing of the detected data and overhead symbols for each symbol period based on the control signal and provides one or more detected data symbol streams and/or a detected overhead symbol stream to RX data processor 930.
- RX data processor 930 processes (e.g., symbol demaps, deinterleaves, and decodes) the detected overhead symbol stream in accordance with the mode used for the composite overhead data and provides decoded overhead data to controller 940.
- RX data processor 930 also processes each detected data symbol stream for each MLC of interest, in accordance with the mode used for that stream, and provides a corresponding decoded data stream to a data sink 932.
- the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein.
- the software codes may be stored in a memory unit (e.g., memory unit 842 and/or 942) and executed by a processor (e.g., controller 840 and/or 940).
- the memory unit may be implemented within the processor or external to the processor.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800388134A CN1998187B (en) | 2003-10-24 | 2004-10-21 | Transmission of overhead information for reception of multiple data streams |
JP2006536813A JP4481995B2 (en) | 2003-10-24 | 2004-10-21 | Transmission of overhead information to receive multiple data streams |
BRPI0415856-3A BRPI0415856A (en) | 2003-10-24 | 2004-10-21 | overhead information transmission to receive multiple data streams |
CA002543414A CA2543414A1 (en) | 2003-10-24 | 2004-10-21 | Transmission of overhead information for reception of multiple data streams |
EP04796065A EP1733495A4 (en) | 2003-10-24 | 2004-10-21 | Transmission of overhead information for reception of multiple data streams |
AU2004307138A AU2004307138C1 (en) | 2003-10-24 | 2004-10-21 | Transmission of overhead information for reception of multiple data streams |
IL175102A IL175102A0 (en) | 2003-10-24 | 2006-04-23 | Transmission of overhead information for reception of multiple data streams |
HK07112853.4A HK1104719A1 (en) | 2003-10-24 | 2007-11-26 | Transmission of overhead information for reception of multiple data streams |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51432003P | 2003-10-24 | 2003-10-24 | |
US60/514,320 | 2003-10-24 | ||
US55974004P | 2004-04-05 | 2004-04-05 | |
US60/559,740 | 2004-04-05 | ||
US10/932,586 US7221680B2 (en) | 2003-09-02 | 2004-09-01 | Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system |
US10/932,586 | 2004-09-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005043794A2 true WO2005043794A2 (en) | 2005-05-12 |
WO2005043794A3 WO2005043794A3 (en) | 2006-11-23 |
Family
ID=34557355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/035005 WO2005043794A2 (en) | 2003-10-24 | 2004-10-21 | Transmission of overhead information for reception of multiple data streams |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1733495A4 (en) |
JP (1) | JP4481995B2 (en) |
KR (2) | KR100877536B1 (en) |
AU (1) | AU2004307138C1 (en) |
BR (1) | BRPI0415856A (en) |
CA (1) | CA2543414A1 (en) |
WO (1) | WO2005043794A2 (en) |
Cited By (20)
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WO2007120938A2 (en) * | 2006-01-04 | 2007-10-25 | Qualcomm Incorporated | Fast channel switching in a multimedia broadcast system |
WO2008041417A1 (en) * | 2006-09-29 | 2008-04-10 | Mitsubishi Electric Corporation | Channel assignment notifying method, communication method and communication apparatus |
JP2009504032A (en) * | 2005-07-27 | 2009-01-29 | クゥアルコム・インコーポレイテッド | System and method for FORWARDLINKONLY physical layer |
WO2009018180A2 (en) * | 2007-07-26 | 2009-02-05 | Qualcomm Incorporated | Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system |
WO2009059252A2 (en) * | 2007-10-31 | 2009-05-07 | Qualcomm Incorporated | Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system |
JP2009534997A (en) * | 2006-04-24 | 2009-09-24 | クゥアルコム・インコーポレイテッド | Interface protocol between multiplexer and transmitter |
JP2009542163A (en) * | 2006-06-26 | 2009-11-26 | クゥアルコム・インコーポレイテッド | Transmit driver data communication |
EP2369881A3 (en) * | 2005-03-28 | 2012-06-06 | Qualcomm Incorporated | Method and apparatus for enhancing signal-to-noise ratio of position location measurements |
US8477809B2 (en) | 2003-09-02 | 2013-07-02 | Qualcomm Incorporated | Systems and methods for generalized slot-to-interlace mapping |
CN103220109A (en) * | 2007-03-07 | 2013-07-24 | 华为技术有限公司 | Sequence distribution in communication system, processing method and processing device |
US8526412B2 (en) | 2003-10-24 | 2013-09-03 | Qualcomm Incorporated | Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system |
US8565233B2 (en) | 2007-09-24 | 2013-10-22 | Qualcomm Incorporated | Mobility management within a wireless communications network |
US8599764B2 (en) | 2003-09-02 | 2013-12-03 | Qualcomm Incorporated | Transmission of overhead information for reception of multiple data streams |
US8605705B2 (en) | 2003-09-02 | 2013-12-10 | Qualcomm Incorporated | Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system |
US8693540B2 (en) | 2005-03-10 | 2014-04-08 | Qualcomm Incorporated | Method and apparatus of temporal error concealment for P-frame |
US8751769B2 (en) | 2007-12-21 | 2014-06-10 | Qualcomm Incorporated | Efficient address generation for pruned interleavers and de-interleavers |
US9819434B2 (en) | 2007-03-07 | 2017-11-14 | Huawei Technologies Co., Ltd. | Method and apparatus for allocating and processing sequences in communication system |
US10305661B2 (en) | 2006-09-30 | 2019-05-28 | Huawei Technologies Co., Ltd. | Method and apparatus for sequence distributing and sequence processing in communication system |
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US11419034B2 (en) | 2008-03-25 | 2022-08-16 | Telefonaktiebolaget L M Ericsson (Publ) | Timing of component carriers in multi-carrier wireless networks |
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US8630219B2 (en) | 2007-09-24 | 2014-01-14 | Qualcomm Incorporated | Supporting a multicast session within a wireless communications network |
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US9268813B2 (en) | 2009-12-24 | 2016-02-23 | Samsung Electronics Co., Ltd. | Terminal device based on content name, and method for routing based on content name |
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2004
- 2004-10-21 KR KR1020087018693A patent/KR100877536B1/en active IP Right Grant
- 2004-10-21 WO PCT/US2004/035005 patent/WO2005043794A2/en active Application Filing
- 2004-10-21 AU AU2004307138A patent/AU2004307138C1/en not_active Ceased
- 2004-10-21 KR KR1020067010082A patent/KR20060096450A/en active Search and Examination
- 2004-10-21 BR BRPI0415856-3A patent/BRPI0415856A/en not_active IP Right Cessation
- 2004-10-21 JP JP2006536813A patent/JP4481995B2/en not_active Expired - Fee Related
- 2004-10-21 EP EP04796065A patent/EP1733495A4/en not_active Withdrawn
- 2004-10-21 CA CA002543414A patent/CA2543414A1/en not_active Abandoned
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US11419034B2 (en) | 2008-03-25 | 2022-08-16 | Telefonaktiebolaget L M Ericsson (Publ) | Timing of component carriers in multi-carrier wireless networks |
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Publication number | Publication date |
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AU2004307138B2 (en) | 2008-05-08 |
EP1733495A2 (en) | 2006-12-20 |
EP1733495A4 (en) | 2010-08-04 |
KR100877536B1 (en) | 2009-01-07 |
JP4481995B2 (en) | 2010-06-16 |
JP2007518290A (en) | 2007-07-05 |
WO2005043794A3 (en) | 2006-11-23 |
KR20080082004A (en) | 2008-09-10 |
CA2543414A1 (en) | 2005-05-12 |
BRPI0415856A (en) | 2007-01-09 |
AU2004307138C1 (en) | 2008-11-13 |
AU2004307138A1 (en) | 2005-05-12 |
KR20060096450A (en) | 2006-09-11 |
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