EP2188914A2 - Method and system for transmitting and receiving signals - Google Patents
Method and system for transmitting and receiving signalsInfo
- Publication number
- EP2188914A2 EP2188914A2 EP08793760A EP08793760A EP2188914A2 EP 2188914 A2 EP2188914 A2 EP 2188914A2 EP 08793760 A EP08793760 A EP 08793760A EP 08793760 A EP08793760 A EP 08793760A EP 2188914 A2 EP2188914 A2 EP 2188914A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- symbol
- pilot symbol
- information
- signals
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000009466 transformation Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 8
- 230000011664 signaling Effects 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 description 17
- 239000000969 carrier Substances 0.000 description 16
- 101150071746 Pbsn gene Proteins 0.000 description 11
- 230000008901 benefit Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
-
- 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
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
- H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
-
- 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
Definitions
- the present invention relates to a method of efficiently transmitting and receiving signals and efficient transmitter and receiver for an OFDM (Orthogonal Frequency Division Multiplexing) system including a TFS (Time-Frequency Slicing).
- OFDM Orthogonal Frequency Division Multiplexing
- TFS Time-Frequency Slicing
- TFS Time-Frequency Slicing
- one broadcasting service can be transmitted throughout time-RF channel domains.
- the figure shows a statistical multiplexing gain which enables transmitting more services efficiently by expanding space from previous single RF channel band to a multiple RF channel bands during multiplexing step in a transmitter.
- frequency diversity gain can be obtained by spreading a single service over multiple RF channels.
- FIG. 1 A frame structure to transmit signals using Time-Frequency Slicing scheme has been suggested.
- the frame structure shown in Fig. 1 transmits pilot signals or reference signals named as Pl and P2 in the beginning of each frame.
- Pl is a pure pilot symbol which has 2K FFT mode and 1/4 guard interval.
- Pl is designed to have 6.82992MHz within total 7.61MHz bandwidth. Other bandwidths are designed to show similar characteristics as this.
- 256 carriers out of 1705 active carriers can be used or one in every six carriers can be used in average.
- the pattern in Fig. 2 shows an irregular pattern having intervals of 3, 6, and 9.
- Used carriers can be modulated by BPSK (Binary Phase Shift Keying) and PRBS
- the carriers represent FFT size used in P2 by using multiple PRBS.
- a receiver can obtain information such as a TFS frame, a size of FFT, and can perform a coarse frequency, timing synchronization.
- P2 has identical FFT size and guard interval as data symbols.
- One in every three carriers can be used as a pilot carrier.
- P2 has been suggested for four purposes. First, it has been suggested for a fine frequency and fine timing synchronization. Second, for transmitting layer information (Ll). Ll describes physical parameters and structure of frame in transmitted signals. Third, to decode P2 symbols by performing channel estimation. The decoded information can be used as an initial value for channel estimation for data symbols at later steps. Finally, it has been suggested to transmit additional layer information (L2). L2 describes information related to transmitted service. Consequently, a receiver can gather information in a TFS frame just from decoding the P2. Thus, channel scan can be performed efficiently.
- P2 can be composed of two OFDM symbols in 8k mode and is composed of a single symbol for a bigger FFT size, and can be composed of multiple symbols for a smaller FFT size.
- signaling capacity that can be transmitted through P2 can be maintained as same as at least that of 8k mode.
- Ll that is transmitted to P2 can be encoded by coding which has error correction capacity and can be interleaved throughout P2 symbol by interleaver to have robust characteristics against impulse noise.
- L2 can be encoded by a coding which has error correction capacity, can be encoded by the same code for data symbol, and can be interleaved throughout P2 symbols by interleaver.
- Ll has information of frame structure and physical layer required for a receiver to decode data symbols. Thus, if P2 can provide information for any data symbol following right after the P2, a receiver may have difficulty in decoding the signals. As a solution to this problem, as shown in Fig. 3, Ll located in P2 can have information about a frame length. However, it has information of a location distanced a signaling window offset from P2.
- data symbols can include varying structures of scattered pilots and continual pilots.
- Ll signaling can include following information.
- Another object of the present invention is to provide novel pilot structures and signaling methods in TFS frame structure for an efficient transmitter and receiver.
- OFDM Orthogonal Frequency Division Multiplexing
- TFS Time Frequency Slicing
- a front end to receive RF signals which include data symbol containing service data, a first pilot symbol for indicating TFS, and a second pilot symbol containing information to access the data symbol; a synchronizer to detect synchronization information from the received RF signals and compensate the received RF signals; a demodulator to demodulate the first pilot symbol, the second pilot symbol, and the data symbol, wherein transformation parameters of the first pilot symbol and the second pilot symbol are identified with transformation parameters of the data symbol; an equalizer to compensate a channel error of the received RF signals; a parameter detector to detect structure information from the second pilot symbol and data symbol from the compensated RF signals; and a decoder to decode a physical layer information from the compensated RF signals.
- a method of receiving signals for an OFDM (Orthogonal Frequency Division Multiplexing) system including TFS (Time Frequency Slicing), comprising: receiving RF signals which include data symbol containing service data, a first pilot symbol for indicating TFS, and a second pilot symbol containing information to access the data symbol; detecting synchronization information from the received RF signals and compensating the received RF signals; demodulating the first pilot symbol, the second pilot symbol, and the data symbol, wherein transformation parameters of the first pilot symbol and the second pilot symbol are identified with transformation parameters of the data symbol; compensating a channel error of the received RF signals; detecting structure information from the second pilot symbol and data symbol from the compensated RF signals; and decoding a physical layer information from the compensated RF signals.
- OFDM Orthogonal Frequency Division Multiplexing
- TFS Time Frequency Slicing
- a transmitter for an OFDM (Orthogonal Frequency Division Multiplexing) system including TFS (Time Frequency Slicing), comprising: a service composer to sort data according to services and to compose a frame which includes data symbol containing the service, a first pilot symbol for indicating TFS, and a second pilot symbol containing information to access the data symbol, wherein transformation parameters of the first pilot symbol and the second pilot symbol are identified with transformation parameters of the data symbol; a frequency splitter to output the frame according to RF channels; and a modulator to modulate the sorted data.
- OFDM Orthogonal Frequency Division Multiplexing
- TFS Time Frequency Slicing
- Fig. 1 is a distribution of a service being spread over RF channels in Time- Frequency Slicing system according to the prior art.
- Fig. 2 is a distribution of carriers for Pl symbols according to the prior art.
- Fig. 3 is a distribution of information about frame of Ll in P2 symbol according to the prior art.
- Fig. 4 is a block diagram of an example of a transmitter in a TFS system according to the present invention.
- Fig. 5 is a block diagram of an example of a receiver in a TFS system according to the present invention.
- Fig. 6 is an example of pilots indexed according to even numbers according to the present invention.
- Fig. 7 is a block diagram of an example of a receiver in a TFS system to perform a
- FIG. 8 is a block diagram of an example of a receiver decoding P2 symbol by using
- Fig. 9 is a combination of FFT sizes and guard intervals that are applicable in a TFS system according to the present invention.
- Fig. 10 is a block diagram of an example of a receiver using Pl symbol and P2 symbol according to the present invention.
- Fig. 11 is a TFS frame structure according to the present invention.
- FIG. 12 is a block diagram of an example of a receiver utilizing Pl symbol guard signaling according to the present invention.
- Fig. 13 is a distribution of scattered pilot in a TFS system.
- Fig. 14 is a receiver that can be used in a TFS system according to the prior art.
- Fig. 15 is a block diagram of an example of a receiver according to the present invention.
- Fig. 16 and Fig. 17 are showing information included in a static layer information according to the present invention.
- Fig. 18 is a structure of TFS ensemble according to the present invention.
- TFS system can be provided.
- improved and robust detection and offset estimation can be realized by correcting Pl symbols.
- channel information for P2 decoding can be provided by correcting a transmission mode. Mode for the Invention
- calculations required for detecting P2 symbol can be eliminated and FFT size expansion can be performed easily by correcting P2 symbol in a TFS system.
- a method for easily locating service and pilot location can be provided by numbering data symbol.
- time and amount of calculations required to detect and restore the signal by a receiver can be reduced greatly. Specifically, the time required to restore transmitted signals can lead to a limitation of number of slots that can be occupied by a service. A method that can vary the size of service can be provided.
- a receiver according to one of the embodiment can perform faster and can cost less than receivers according to prior arts.
- a method to reduce physical load and latency at a receiver can be provided by providing a method of efficiently transmitting Pl and
- Fig. 4 shows an example of a transmitter in TFS system according to the present invention.
- Data that need to be transmitted can be transformed into TFS frames by being assorted according to service by the Service Composer (101), then can be formed into
- Frequency splitter (102) can send the data to modulators (108) after assorting the data for each RF channels in TFS frames.
- QAM mapping (103) can modulate the data into
- Interleaver (104) can perform frequency and bit interleaving.
- Pilot symbol insertion (105) can insert scattered and continual pilots into symbols. Then,
- OFDM (106) can perform Orthogonal Frequency-Division Multiplexing for the data.
- pilot symbol insertion (107) can insert pilot symbols including Pl and P2 to
- FIG. 5 shows an example of a receiver of TFS system according to the present invention.
- signals received by Front End (102) can be synchronized by the Sync (202) using guard interval and other information.
- synchronized signals can be demodulated by OFDM demod (203) by using predetermined Pl symbol parameters. Afterwards, P2 symbols, FFT size of data symbol, and guard interval can be extracted by Mode detection (204).
- the extracted P2 symbols, the FFT size of data symbol, and the guard interval can be transmitted to OFDM demod (203) and OFDM can be performed for symbols other than Pl symbol.
- information extracted from Mode detection (204) can be transmitted to Sync (202) and Front End (201).
- Equalizer (206) can correct errors.
- TFS parameter detection (205) can obtain P2 symbol, TFS frame structure information, and physical layer information from data symbol.
- the above information can be transmitted to Front End (201) and Sync (202) for a proper synchronization.
- other necessary information can be transmitted to Service decoding (209).
- a receiver can get information of TFS frame structure information and can locate the location of service.
- physical layer data can be equalized by Equalizer (206) by using pilot symbols such as continual pilots, scattered pilots, then can be transformed by Deinterleaving (207) and QAM De-mapping (208), then can be decoded by Service decoding (209) and outputted as streams.
- the role of Pl symbol in TFS system can be enabling a receiver to detect Pl fast, giving a receiver information about FFT size, and enabling a receiver to perform coarse frequency and timing synchronization.
- novel Pl symbol can be designed to enhance the aforementioned roles.
- Pl symbol of TFS frame can be constructed such that every even numbered pilot be used as carrier pilot and every odd numbered pilot be used as null carrier or unused carrier.
- every even numbered pilot can be used as null carrier or unused carrier and every odd numbered pilot can be used as carrier pilot.
- Pilot symbols according to present invention can be called Even or Odd-numbered symbol as opposed to pilot symbols according to prior art. Pilot symbols according to present invention can have more pilot carriers than pilot symbols in prior art.
- Fig. 6 shows an example of Even-numbered pilot according to present invention.
- TFS frame in various fashion.
- pilot symbol structure can be applied while keeping parameters of prior art such as 1/4 guard interval and 2k mode.
- receiver can use 2k FFT to detect Pl symbols according to present invention. Processes performed afterwards can be conventional methods.
- Pl symbols can be transmitted in a mode which has the biggest FFT size and a longest guard interval at the FFT size in a TFS system.
- Pl symbols transmitted using fixed parameters can be detected accordingly.
- a Pl symbol transmitted in that fashion can provide channel information that can be used to decode a P2 symbol which follows the Pl symbol.
- P2 symbol is a symbol that can transmit combined information of FFT size and all guard interval. According to present invention, for a situation where Pl symbol is transmitted with the biggest FFT size and the longest guard interval at the FFT size, even with the longest delay spread that can be defined by system, channel information for all FFT sizes of P2 can be gathered without loss.
- Pl symbols according to conventional art show irregular pattern which can make it difficult to obtain channel information or can cause loss.
- structure according to present invention channel information can be easily obtained because Pl symbols are arranged in an orderly fashion.
- Fig. 7 shows a receiver to perform P2 symbol decoding according to prior art.
- P2 pilot extraction (701) can gather channel information by extracting P2 pilot.
- Equalizer (703) requires the channel information to decode P2, thus, P2 data should be buffered by buffering (702) while P2 pilot extraction and a channel information calculation are performed. Consequently, there can be a delay in synchronization.
- FIG. 8 shows a receiver decoding P2 symbol using Pl according to the present invention.
- the receiver according to the present invention can apply information gathered from Pl at Mode detection (801) to P2 and perform decoding through Equalizer (802). Consequently, data buffering and latency for gathering channel information which shows channel status of P2, as shown in the conventional art, can be reduced. In turn, this can reduce a synchronization time for the whole system.
- Fig. 9 shows a combination of FFT size that can be applied to TFS system and guard intervals. According to the figure, Pl symbol can be transmitted as a symbol having size of 32K FFT and 1/8 guard interval.
- Pl and P2 symbols can be transmitted in a mode which has the biggest FFT size and the longest guard interval at that FFT size.
- receiver can detect and decode Pl and P2 symbols based on already known fixed FFT size and guard interval without additional calculation for detecting P2 symbol.
- channel estimation using Pl symbol for P2 decoding correlation calculation, data buffering, and processing latency required in a conventional receiver can be reduced.
- channel information gathered from P2 symbol may not have loss of information just like information gathered from Pl, thus, the channel information gathered from P2 symbol can be used as an initial channel information for data symbol which follows P2 symbol.
- FFT size of data symbol can be transmitted in P2.
- later expansion of FFT size can be easily realized and FFT size detection can be simplified.
- Fig. 10 shows an example of system using Pl and P2 according to the present invention.
- Mode detection (204) can be eliminated.
- New Equalizer (1001) and TFS parameter detection (1002) can perform signaling of information of FFT size of data symbol and guard interval information.
- Sync (1003) and OFDM demod (1004) can perform calculation for data symbols according to TFS parameters obtained from synchronization and calculation for predetermined Pl and P2 symbols.
- Pl and P2 symbols can be transmitted in a mode which has same FFT size and guard interval as data symbol.
- load at a receiver side can be reduced while advantages from the third example of the present invention are maintained.
- the receiver can perform calculation to get location of OFDM symbol and can obtain the FFT size at the same time. Guard interval correlation characteristics can be used to get the location of OFDM symbol and FFT size can be obtained. By acquiring OFDM symbol location and FFT size at the same time, PRBS decoding process of Pl for gathering FFT size can become unnecessary.
- a receiver shown in Fig. 10 can be used. It can operate in a simple fashion because, as opposed to the third example, it can work in a mode which uses a single FFT size and a guard interval acquired by OFDM demod (1004) and Sync (1003).
- Fig. 11 shows a TFS frame structure according to the present invention.
- Pl and P2 symbols can be dispersed in time domain in a fashion as shown in Fig. 11 as opposed to conventional art. In this way, P2 symbol can have diversity gain in both frequency and time domains.
- TFS frame may occur in conventional art.
- receiver can obtain P2 for that RF channel while switching to a next RF channel, thus, latency required to decode P2 can be reduced.
- P2 symbol has same FFT size and guard interval as data symbol.
- Pl symbol PRBS pattern should be extracted and data symbol and guard interval in P2 symbol should be detected.
- Detecting P2 symbol has a close relationship with delay in performing syn- chronization in TFS system, thus, can affect system performance. This invention can provide an easier way to detect P2 symbol.
- P2 guard interval mode In addition to transmitting Pl symbol with FFT size of P2 in PRBS pattern, P2 guard interval mode can be added. Guard interval mode information can be included to part of Pl symbol pilot carriers. In this case, calculation and processing latency that might occur for extracting P2 symbol guard interval mode can be reduced.
- Fig. 12 shows a system which uses guard interval signaling of Pl symbol according to present invention.
- P2 and data symbol detection and decoding can be performed fast.
- FFT size or guard interval mode can be transmitted as a predetermined combination. This can allow a receiver to detect the FFT size and guard interval easily.
- advantages from aforementioned combination with Pl can be obtained. This is similar as the example shown in Fig. 10.
- P2 symbol can be composed of multiple OFDM symbols, a single
- OFDM symbol having 16K, 32K FFT size, or additional symbols depending on required amount of information.
- information in P2 can be encoded using error correction code and can be interleaved in P2 to acquire robustness against impulse noise.
- receiver To deinterleave P2 symbols, receiver must know the number of OFDM symbols in P2 symbol. To do this, information about number of OFDM symbols which comprises P2 symbols can be included in a first OFDM symbol of either Pl symbol or P2 symbol. To be able to do that, number of OFDM symbols which comprise P2 symbols can be included in specific carriers of Pl or P2 symbol.
- TFS system uses service multiplexing to process multiple RF channels.
- Each service takes slot assigned by service multiplexer.
- Information such as location of service and size can be included in P2 and can be transmitted so that receiver can restore the service.
- location of service can be included in each OFDM cell, i.e., each carrier.
- OFDM symbol number should be known. Thus, if each OFDM symbol can include an OFDM symbol number in a frame, receiver can locate service more efficiently.
- a receiver can switch RF channels periodically to receive a service.
- the time passed during switching RF channels can be varied, thus, number of OFDM symbols during the switching can be also varied. Consequently, if a location of OFDM symbol in a frame is known, wherein the OFDM symbol is received during RF channel switching, service location can be easily calculated regardless of when the RF channel is switched.
- scattered pilots are inserted into data symbol to extract channel that the data symbol has gone through.
- the scattered pilot can show different patterns periodically.
- location of scattered pilots should be obtained. At this time, if receiver has OFDM symbol number, scattered pilot location can be obtained by just using the number.
- OFDM symbol numbering method can eliminate additional calculation for extracting scattered pilot location and service location to decode data symbol.
- Fig. 14 shows a receiver which can be used in TFS system according to a prior art.
- Time detection (1401) can detect actual time passed while acquiring service location after RF channel is switched.
- Address detector (1402) can obtain service address and OFDM symbol number using the above passed time information.
- Symbol parser (1403) can obtain services. However, in real application, it may not be easy to detect the actual time passed.
- Fig. 15 shows an example of a receiver according to present invention which can be used when service address is obtained from obtaining OFDM symbol from data symbol.
- OFDM symbol number detection (1501) can obtain OFDM symbol number by using data symbol numbering information coming from Equalizer (206).
- Address detector (1502) can obtain service address using the number.
- Symbol Parser (1503) can obtain services required.
- OFDM symbol numbering numerous methods can be used. As one of simplest way, specific carrier of data symbol can be assigned during OFDM symbol numbering.
- Ll This can include FFT size, guard interval mode, and number of physical layer channel for services in TFS frame.
- service layer information can be transmitted by Ll signaling. The aforementioned information does not change much and is not necessary to be transmitted in each TFS frame, thus, can be regarded as static layer information (Ll static).
- channel information used by TFS ensemble can be included in next_tfs_ensemble field.
- Information about whether layer information is renewed or not can be included in Ll_sat_ver field.
- FFT size can be included in fft size field.
- receiver should scan to find all frequency range such as UHF/VHF to find the multiple TFS services. This can be time consuming and ineffective.
- next_tfs_ensemble can have different value, and for this case, Ll_stat_ver value can be renewed and saved. Consequently, receiver can automatically recognize newly added TFS ensemble.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US97157107P | 2007-09-11 | 2007-09-11 | |
KR1020080064942A KR20090027136A (en) | 2007-09-11 | 2008-07-04 | Data transmitting apparatus in a time-frequency slicing system and method thereof |
PCT/KR2008/005364 WO2009035271A2 (en) | 2007-09-11 | 2008-09-11 | Method and system for transmitting and receiving signals |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2188914A2 true EP2188914A2 (en) | 2010-05-26 |
EP2188914A4 EP2188914A4 (en) | 2011-05-04 |
Family
ID=40694883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08793760A Withdrawn EP2188914A4 (en) | 2007-09-11 | 2008-09-11 | Method and system for transmitting and receiving signals |
Country Status (3)
Country | Link |
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EP (1) | EP2188914A4 (en) |
KR (1) | KR20090027136A (en) |
WO (1) | WO2009035271A2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006131797A2 (en) * | 2005-06-09 | 2006-12-14 | Nokia Corporation | Signaling network id in tps bits |
WO2007083940A1 (en) * | 2006-01-19 | 2007-07-26 | Lg Electronics Inc. | Method for transmitting and receiving tranffic information and apparatus thereof |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100895173B1 (en) * | 2005-08-31 | 2009-05-04 | 삼성전자주식회사 | Handover method and apparatus for digital multimedia broadcasting systems |
-
2008
- 2008-07-04 KR KR1020080064942A patent/KR20090027136A/en not_active Application Discontinuation
- 2008-09-11 EP EP08793760A patent/EP2188914A4/en not_active Withdrawn
- 2008-09-11 WO PCT/KR2008/005364 patent/WO2009035271A2/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006131797A2 (en) * | 2005-06-09 | 2006-12-14 | Nokia Corporation | Signaling network id in tps bits |
WO2007083940A1 (en) * | 2006-01-19 | 2007-07-26 | Lg Electronics Inc. | Method for transmitting and receiving tranffic information and apparatus thereof |
Non-Patent Citations (2)
Title |
---|
DVB ORGANIZATION: "T2_0200 CfT response Teracom TFS_concept.pdf", DVB, DIGITAL VIDEO BROADCASTING, C/O EBU - 17A ANCIENNE ROUTE - CH-1218 GRAND SACONNEX, GENEVA - SWITZERLAND, 4 June 2007 (2007-06-04), XP017817443, * |
See also references of WO2009035271A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP2188914A4 (en) | 2011-05-04 |
KR20090027136A (en) | 2009-03-16 |
WO2009035271A2 (en) | 2009-03-19 |
WO2009035271A3 (en) | 2009-05-22 |
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