CN101953133A - Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system - Google Patents
Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system Download PDFInfo
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- CN101953133A CN101953133A CN2009801060929A CN200980106092A CN101953133A CN 101953133 A CN101953133 A CN 101953133A CN 2009801060929 A CN2009801060929 A CN 2009801060929A CN 200980106092 A CN200980106092 A CN 200980106092A CN 101953133 A CN101953133 A CN 101953133A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]
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- 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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system. A frame for a broadcast service is generated using an in-band signaling scheme, and includes location information of control information in a next frame and indication information indicating a change/no-change in the control information in the next frame. The new frame structure minimizes power consumption of a receiver supporting the broadcast service.
Description
Technical field
The present invention relates generally to broadcast system, more specifically, relate to the apparatus and method that are used to send and receive the frame that comprises control information.
Background technology
Nowadays, development along with communication and broadcast technology, just attempting seeking the new mode that broadcast service is provided in broadcast system or mobile communication system, and current carrying out about can on the broadcast service channel, sending such as the common broadcast service of voice and image and such as the discussion of the high-level service of the newer service of grouped data.
In addition, broadcast service satisfies user and consumer for digitlization, multichannelization, broadband by adopting the various communication technologys, the needs of high-quality etc. and making progress.Particularly, universal gradually recent the increasing that comprises the portable broadcasting equipment of high definition digital television and portable multimedia player (PMP) to being used to support the various technology requirement of broadcast service.
Fig. 1 illustrates the frame structure of using broadcast service of the present invention.
With reference to figure 1, frame 101 comprise lead code 102, layer 1 (L1) signaling 103, layer 2 (L2) signaling 104 and at least one physical layer pipe (PLP) 105,106 ..., 107.Lead code 102 comprises the synchronous information that is used to obtain time and the Frequency Synchronization between transmitter and the receiver or is used to obtain frame boundaries.L1 signaling 103 as physical layer signaling comprises L1 static information 108, the configurable information 109 of L1 and L1 multidate information 110.As a reference, the L1 signaling sends on the P2 code element.
L1 static information 108 comprise in time through static basically information.For example, L1 static information 108 can comprise the information about cell identifier, network identifier, radio frequency (RF) channel number, frame length, pilot subcarrier position etc.
Though the configurable information 109 of L1 comprises the information that changes, still can change once in a while that is not based on frame by frame, that is, generally continue the information of a plurality of frames.For example, the configurable information 109 of L1 can comprise the information about service identifier, the modulation order (modulation order) that is used for the transfer of data of independent service, encoding rate etc.Here, the unit that the configurable information 109 of wherein L1 static information 108 and L1 is changed is defined as superframe, and it comprises at least one frame.
L1 multidate information 110 comprises can be based on the information that changes frame by frame.For example, L1 multidate information 110 can comprise with present frame in send the relevant information in position of each PLP.More specifically, L1 multidate information 110 can comprise about the starting point of corresponding PLP and the information of end point, that is, and and the positional information of a plurality of PLP that on frame, send.The position of these PLP experiences change in next frame.
L2 signaling 104 expression medium access control (MAC) signalings, the PLP that sends the L2 signaling therein is also referred to as PLP0.The L2 signaling comprises the link information of each PLP and broadcast service interchannel.That is, the L2 signaling comprises indication receives the information of specific broadcast service by which PLP.
PLP_1 105, PLP_2 106 and PLP_N 107 send one or more broadcast service channels.Send actual broadcast service data by PLP_1 105, PLP_2 106 and PLP_N 107.Therefore, PLP_1 105, PLP_2 106 and PLP_N 107 also can be called as data PLP.
Below, will the process that receive the broadcast service channel be described with reference to figure 1.
With reference to figure 1, receiver obtains synchronously by lead code 102 and frame 101, and the information that obtains such as data transmission scheme or frame lengths from L1 signaling 103.Afterwards, based on L2 signaling 104, receiver determines which PLP sends the broadcast service channel that its expectation receives.Afterwards, receiver receives actual broadcast data by the data PLP corresponding with PLP_1 105, PLP_2 106 and PLP_N 107.As mentioned above, in order to receive the broadcast service channel, receiver receives lead code 102, L1 signaling 103, L2 signaling 104 and data PLP 105 to 107 successively to each frame.
In communication system, propose in-band signalling and receive lead code 102, L1 signaling 103, L2 signaling 104 and data PLP 105 to 107 successively to prevent receiver every frame when its reception broadcast service channel reaches the time of pre-fixed length.The in-band signalling scheme uses special PLP to send the multidate information 110 of L1 signaling in the next frame.
Fig. 2 illustrates that support has the frame structure of the broadcast service of traditional in-band signalling scheme.More specifically, the continuous in time frame of Fig. 2 explanation.
With reference to figure 2, frame #k has followed 202 back frame # (k+1) 202.More specifically, continuous in time transmit frame #k 201 and frame # (k+1) 202 are used for the reception of broadcast service channel.Frame #k 201 and frame # (k+1) 202 comprise lead code 203 and 209, L1 signaling 204 and 210, L2 signaling 205 and 211 and data PLP 206,207,212,213 and 214 respectively.
Suppose that receiver is receiving specific broadcast service channel, and in frame #k 201, receiver receives the broadcast service channel by PLP_2 207, and when using the in-band signalling scheme, PLP_2 207 comprises the multidate information of indication as the position of PLP_2 among frame # (k+1) 202 of next frame.That is, according to the in-band signalling information 216 that comprises among the PLP_2 207 that receives in frame #k 201, receiver can obtain to be used for to obtain the information 217 as the PLP_2 213 of the frame # (k+1) 202 of the next frame that receives identical broadcast service channel.Thereby, the in-band signalling among the PLP_2 207 of dependence present frame, the position of the PLP_2 213 that sends broadcast data can be checked or discern to receiver, and need not to receive L1 signaling 210 by the P2 among the next frame # (k+1) 202.
More specifically, according to the in-band signalling scheme, finished among the frame #k 201 reception till the PLP_2 207 receiver can receive various information (as, lead code 209, L1 signaling 210 and L2 signaling 211) time close its equipment, receive the PLP_2 213 of next frame # (k+1) 202 up to it.As seen, the in-band signalling scheme is intended to reduce the power consumption of receiver.
Summary of the invention
Technical problem
Yet about the support to the actual broadcast service, the power that expectation may be failed directly or be obtained in fact to the receiver of use in-band signalling scheme in fact reduces effect.Generally, this is because in traditional in-band signalling scheme, and the P2 of the next frame # (k+1) of transmitter by following present frame #k only sends the multidate information in the L1 signaling 210.Owing to these reasons, actual receiver must be carried out the operation that receives L1 signaling 210 by the P2 among the frame # (k+1) 202, because receiver may normally not receive broadcast service, because it does not have the change/unaltered information about other information except multidate information in the L1 signaling 210 (that is the configurable information of L1 static information and L1).
Therefore, receiver is opened its receiving element so that receive other information except multidate information in the L1 signaling 210, that is, and and the configurable information of L1 static information and L1.As a result, traditional in-band signalling scheme fails to cause the power save of the receiver envisioned.
In addition, because traditional in-band signalling scheme only sends the multidate information of the P2-L1 signaling 210 in the next frame for time period of specific PLP, it may finally can't provide the change/unaltered information about the information of the L2 signaling 211 of the mapping relations of indicating each PLP and broadcast service interchannel.
More specifically, even if change by the information in the L2 signaling 211 of PLP0 transmission, if receiver fails to detect this change, then when receiver receives broadcast data after a while fatal error may take place.Therefore, even if traditional receiver utilizes the in-band signalling scheme, it still has to receive successively lead code 209, L1 signaling 210, L2 signaling 211 and data PLP 212 to 214.
Therefore, current broadcast system need solve the new in-band signalling scheme of the problem that the application by traditional in-band signalling scheme causes.In addition, need broadcast service method of sending and receiving more accurately, it still utilizes the in-band signalling scheme, but prevents some reception mistakes of broadcast data at least.
Technical scheme
The present invention is designed for the described at least problem of solution and/or shortcoming and following at least advantage is provided.Therefore, an aspect of embodiments of the invention is, a kind of apparatus and method that send the control information of broadcast service in broadcast system by the in-band signalling scheme of application enhancements expeditiously are provided.
Being on the other hand of embodiments of the invention, provide a kind of in broadcast system the in-band signalling scheme by application enhancements produce frame that is used for broadcast service and the apparatus and method that send this frame.
Being on the other hand of embodiments of the invention provides a kind of change/unaltered indication information that indication is included in the control information in the next frame in broadcast system to be included in the present frame and sends the apparatus and method of this frame.
Being on the other hand of embodiments of the invention, provide a kind of in broadcast system the in-band signalling scheme by application enhancements produce superframe that is used for broadcast service and the apparatus and method that send this superframe.
Being on the other hand of embodiments of the invention provides a kind of change/unaltered indication information that indication is included in the control information in next superframe in broadcast system to be included in the current superframe and sends the apparatus and method of this superframe.
Being on the other hand of embodiments of the invention provides a kind of apparatus and method of control information of it having been used the broadcast service of improved in-band signalling scheme that receive expeditiously in broadcast system.
Being on the other hand of embodiments of the invention provides a kind of and is received as frame that the in-band signalling scheme produces and by checking that the in-band signalling signal in the frame that is received receives the apparatus and method of the control information of change in broadcast system.
Being on the other hand of embodiments of the invention provides a kind of change of the control information by relying on the in-band signalling signal check next frame in the present frame in broadcast system/ change and come the optionally apparatus and method of receiving control information.
Being on the other hand of embodiments of the invention provides a kind of and receives the superframe produce based on the in-band signalling scheme and by checking that the in-band signalling signal in the superframe that is received optionally receives the apparatus and method of the control information that changes in next superframe in broadcast system.
Being on the other hand of embodiments of the invention provides a kind of receiving system and method for optionally controlling the control information in next superframe in broadcast system by the change/unaltered indication information that relies on current superframe inspection indication to be included in the control information in next superframe.
Being on the other hand of embodiments of the invention, provide a kind of in broadcast system by using improved in-band signalling scheme to send and receiving the receiving system and the method for saving the power of receiver about the control information of broadcast service.
According to an aspect of embodiments of the invention, provide a kind of method that in the system that supports broadcast service, sends the frame that comprises control information.This method comprises: produce the frame that comprises the change/unaltered indication information of the control information of broadcast service at least one physical layer pipe (PLP) and the indication next frame, this indication information is included among one of described at least one PLP; And send the frame produced.
According to embodiments of the invention on the other hand, provide a kind of device that in the system that supports broadcast service, sends the frame that comprises control information.This device comprises: the frame generator produces the frame that comprises at least one physical layer pipe (PLP); Transmitting element is used to send the frame that is produced; And controller, be used for the control frame generator to be created in the frame that one of described at least one PLP comprises the change/unaltered indication information of the control information that is used for indicating the next frame broadcast service.
According to embodiments of the invention on the other hand, provide a kind of method that in the system that supports broadcast service, receives the frame that comprises control information.This method comprises: receive the frame of change/unaltered indication information comprise at least one physical layer pipe (PLP) and to be used for indicating the control information of next frame broadcast service, this indication information is included among one of described at least one PLP; Extract this indication information; And determine to receive control information in the next frame, still be direct receiving data information and receiving control information not based on the indication information that is extracted.
According to embodiments of the invention on the other hand, provide a kind of device that in the system that supports broadcast service, receives the frame that comprises control information.This device comprises: receiving element, reception comprises at least one physical layer pipe (PLP) and is used for indicating the frame of change/unaltered indication information of the control information of next frame broadcast service that this indication information is included among one of described at least one PLP; The in-band signalling dector is used to extract this indication information; And controller, be used for based on the indication information that is extracted determine to receive next frame control information, still be direct receiving data information and receiving control information not, and selectively open or close receiving element.
Beneficial effect
State obviously so as can be known in the past, according to embodiments of the invention, transmitter sends the change/unaltered indication information of the control information be used to indicate next frame by the PLP in the present frame, make thus reception that receiver can optionally control control information with and be used for the power consumption of Data Receiving.Here, this frame comprises the frame that is used for broadcast service, and comprises the superframe that comprises at least one frame.
Therefore, receiver relies on this indication information to detect the change/change of the control information of next superframe in current superframe, and optionally opens or close its receiving element with receiving control information, makes it possible to accurately receive broadcast service.
In addition, receiver can use indication information to detect the change of the control information of next superframe in advance, makes the power consumption that can reduce its receiving element and receive broadcast service with still less fatal error thus.
Description of drawings
By the detailed description below in conjunction with accompanying drawing, above-mentioned and other aspects, feature and the advantage of embodiments of the invention will be more obvious, wherein:
Fig. 1 illustrates the frame structure of using broadcast service of the present invention;
Fig. 2 illustrates that support has the frame structure of the broadcast service of traditional in-band signalling scheme;
The operation of the transmitter of broadcast service is supported in Fig. 3 explanation according to an embodiment of the invention;
The operation of the receiver of broadcast service is supported in Fig. 4 explanation according to an embodiment of the invention;
Fig. 5 illustrates the structure of transmitter according to an embodiment of the invention; And
Fig. 6 illustrates the structure of receiver according to an embodiment of the invention.
In the accompanying drawing, identical accompanying drawing reference numerals will be interpreted as and refer to components identical, feature and structure.
Embodiment
Be discussed in more detail below different embodiments of the invention referring now to accompanying drawing.In the following description, for clear and succinct so, omit the known function incorporated into and the detailed description of configuration here.
Embodiments of the invention define the superframe that comprises at least one frame in broadcast system, and the term superframe that uses in the whole text of the specification unit of indicating L1 static information therein or the configurable information of L1 to change.For convenience, in the following description,, suppose that superframe only comprises a frame as example.Yet embodiments of the invention also are applicable to the superframe that comprises a plurality of frames.
Embodiments of the invention are provided at the scheme that is used to produce and send the broadcast service frame in the broadcast system, wherein transmitter comprises the change/unaltered indication information that is used for indicating the next frame control information in this frame, so that correctly receive broadcast service at the receiver place.Therefore, can to rely on the change of control information in the next frame/ change to determine to open by present frame still be specific (a plurality of) that close in its receiving element to receiver.That is, according to embodiments of the invention, the change of receiver by checking control information/ change and come receiving broadcast service data more accurately.
The operation of the transmitter of broadcast service is supported in Fig. 3 explanation according to an embodiment of the invention.
With reference to figure 3, before producing present frame, transmitter is determined the L1 signaling that will send by the P2 in the next frame and will be by the L2 signaling information of PLP0 transmission in step 301.Here, can comprise that L1 static information, the configurable information of L1 and L1 multidate information are as the L1 signaling.Transmitter determines that (that is, positional information PLP0) is as the L2 signaling information by its PLP that sends the L2 signaling.Equally, receiver is determined the positional information about the data PLP of broadcast service.
In step 302, transmitter determines whether the configurable information of L1 static information, L1 from present frame or PLP0 information change for the configurable information of L1 static information, L1 that will send at next frame or PLP0 information.When L1 static information, the configurable information of L1 or PLP0 information have changed, in step 303, transmitter is provided with the indication information of the change of L1 static information, the configurable information of L1 in the indication next frame or PLP0 information, and set indication information is included in the in-band signalling on the particular data PLP in the middle of the data PLP that will send in present frame.
Embodiments of the invention also are applicable to the situation of the change of L1 static information, the configurable information of L1, L1 multidate information or PLP0 information in the wherein said indication information indication next frame.Yet the indication information that embodiments of the invention definition described herein will be provided with does not contain the L1 multidate information, because the L1 multidate information is a kind of information variable in each frame.This definition can alternatively be selected by system operator.
Refer back to step 302, when L1 static information, the configurable information of L1 or PLP0 information do not change in the next frame, transmitter is provided with L1 static information, the configurable information of L1 in the indication next frame or PLP0 information in step 304 not have the indication information that changes, and the no indication information of change that will be provided with is included in the in-band signalling on each data PLP that will send in present frame.
Be provided with in the first method of indication information in step 303 and 304, can be with predetermined Bit Allocation in Discrete to the configurable information of L1 static information, L1 in the present frame or each the change in the PLP0 information with L1 static information, the configurable information of L1 or PLP0 information in the indication next frame.For example, for in L1 static information, the configurable information of L1 or the PLP0 information each is distributed a bit, so that have the change that the bit of the distribution of value ' 1 ' is indicated corresponding information, and the bit with value ' 0 ' indicates corresponding information not change, otherwise or.Equally, this concrete definition can be selected by system operator.
As the second method that indication information is set, distribute a bit for L1 static information, the configurable information of L1 or PLP0 information are all, indicate any change in three types the information of being distributed so that have the bit of the distribution of value ' 1 ', and anyly in three types the information that the bit indication with value ' 0 ' is distributed all not have a change, otherwise or.
As the third method that indication information is set, can distribute a plurality of bits for L1 static information, the configurable information of L1 or PLP0 information are all, with this information change of which frame after the indication present frame.
For example, when distributing 8 bits, ' 00000000 ' can indicate and not have information to change in the next frame, and the configurable information of L1 static information, L1 in the 10th frame after ' 00001010 ' (metric 10) the indication present frame or any one change in the PLP0 information.Therefore, can expand the Bit Allocation in Discrete that is used for L1 static information, the configurable information of L1 or PLP0 information.
Transmitter be provided with in present frame according to the present invention the indication next frame in control information change/unaltered indication information so that receiver can check with in-band signalling (promptly, but L1 static information, the configurable information of L1 or PLP0 information) the change/of each bit of indication information correspondence change, thereby receiver can suitably open or cut out.As a result, receiver can optionally reduce power consumption.
In step 305, transmitter produces or disposes present frame so that at least one data PLP that present frame can comprise lead code, L1 signaling, L2 signaling and comprise the change/unaltered indication information of L1 static information, the configurable information of L1 or PLP0 information in the indication next frame.Sender to receiver sends the present frame that is produced.
In step 306, transmitter produces next frame by the identical process of the next frame after the present frame being carried out above-mentioned steps 301 to 305.
Here, in other embodiments of the invention, also can use the change of indication information with L1 static information, the configurable information of L1, L1 multidate information or PLP0 information in the indication next frame.
The operation of the receiver of broadcast service is supported in Fig. 4 explanation according to an embodiment of the invention.
With reference to figure 4, in step 401, the in-band signalling the data PLP of receiver from the present frame #k that imports into obtains to be used for indicating the change/unaltered indication information of next frame L1 static information, the configurable information of L1 or PLP0 information.In addition, receiver obtains positional information or the L1 multidate information of PLP identical in the next frame.That is, in step 401, the change/unaltered indication information of the positional information that is used to indicate identical PLP (L1 multidate information), L1 static information, the configurable information of L1 or PLP0 information that the receiver storage obtains.Afterwards, receiver receives the broadcast service channel by (a plurality of) data PLP of the present frame that imports into.
After the reception of finishing the broadcast service channel that imports in the present frame, receiver prepares to receive next frame # (k+1) in step 402.
In step 403, receiver determines based on the indication information that obtains whether L1 static information, the configurable information of L1 or PLP0 information change at the starting point place of next frame.When indication information indication L1 static information, the configurable information of L1 or PLP0 information do not change, in step 404, receiver also can directly receive broadcast data in the position of corresponding data PLP and not be used among the next frame # (k+1) by P2 reception L1 signaling or by PLP0 reception L2 signaling.Therefore, receiver cuts out its receiving element at the acceptance point place of L1 signaling or L2 signaling, because it has detected L1 signaling that sends by P2 or the not change of L2 signaling that sends by PLP0.Afterwards, its receiving element is opened at the acceptance point place of the data PLP that receiver sends after the transmission of L1 signaling or L2 signaling, and receives the broadcast service channel that sends by data PLP.
On the contrary, if change in step S403 indication information indication L1 static information, the configurable information of L1 or PLP0 information, then in step 405, the change of L1 signaling that receiver sends by P2 based on the indication information identification of the change of indication L1 static information, the configurable information of L1 or PLP0 information or the L2 signaling that sends by PLP0.Therefore, receiver will receive the L1 signaling by P2 in next frame # (k+1), and L1 static information that acquires change or the configurable information of L1.In addition, receiver receives the L2 signaling by PLP0 in next frame # (k+1), and the L2 signaling information that acquires change, because the information that is included in L1 signaling or the L2 signaling is the important control information that directly relates to the reception of broadcast service data.
Therefore, after the configurable information of L1 static information, L1 or PLP0 information of the change that sends at the acceptance point place that is received in L1 signaling or L2 signaling, receiver receives the broadcast service channel by using the configurable information of L1 static information, L1 or the PLP0 information that change.
According to the third method that indication information is set of describing, provide as embodiments of the invention, when the change of receiver identification L1 static information, the configurable information of L1 or PLP0 information will be made after the one or more frames of process, receiver will receive the L1 signaling or receive the P2 signaling by PLP0 by P2 at the frame of the bit indication that is used for indication information by distribution.
For example, when the indication information that obtains in step 401 had the value ' 00001010 ' (metric 10) of 8 bits, receiver identification L1 static information, the configurable information of L1 or PLP0 information changed the 10th frame after present frame.Therefore, when present frame is assumed that the 10th frame, receiver will receive the L1 signaling or receive the P2 signaling by PLP0 by P2 in the 10th frame, and all need not receive the L1 signaling or receive the P2 signaling by any PLP0 by P2 up to the 9th frame.
That is, according to embodiments of the invention, receiver can directly receive the data PLP of the correspondence in the 10th frame after present frame, and all need not receive the L1 signaling or receive the P2 signaling by any PLP0 by P2 up to the 9th frame.Here, receiver can receive or not receive L1 and L2 signaling based on its available horsepower.
After completing steps 404 or 405, receiver returns step 401 and to next frame repeating step 402 to 405.
As implied above, though only comprise a frame as example superframe described herein, embodiments of the invention also are applicable to the superframe that comprises a plurality of frames.
Under this situation, can with the step 303 of Fig. 3 and 304 and the step 401 of Fig. 4 in the indication information that provides be defined as the change of L1 static information, the configurable information of L1 or PLP0 information in next superframe of indication/ change.In other cases, in other example embodiment of the present invention, indication information can be defined as the change/change of L1 static information, the configurable information of L1, L1 multidate information or PLP0 information in the indication next frame.Therefore, in step 403, receiver can be determined the change of control information/ change based on superframe one by one.
Fig. 5 illustrates the structure of transmitter according to an embodiment of the invention.
With reference to figure 5, transmitter comprises scheduler 501, controller 502, in-band signalling signal generator 503, frame generator 504, sends data buffer 505 and frame transmitter 506.Sending data buffer 505 can be the memory that for example is used to store the broadcast service data that provides from the upper strata.Be stored in the broadcast service data that sends in the data buffer 505 and send to receiver by several broadcast service channels.
After inspection is stored in the broadcast service data that sends data buffer 505, scheduler 501 operation dispatchings.This scheduling can comprise to be considered the broadcast service data that transmitter will send and determines control information in the particular frame, i.e. L1 static information, the configurable information of L1 or L1 multidate information, PLP0 information, and at least one data PLP.
For example, when supporting broadcast service on wireless communication system, the L1 static information information of frame length and RF channel number (that is, such as) can experience change.In addition, comprise that the modulation order of each service and the configurable information of L1 of data transfer rate are changeable according to specific broadcast service.Equally, the positional information of broadcast service channel and specific PLP is variable.Therefore, scheduler 501 considers that its broadcast service that will send is provided with L1 static information, the configurable information of L1, L1 multidate information, PLP0 information and data PLP.Scheduling result is provided for controller 502.
Controller 502 control in-band signalling signal generators 503 produce the in-band signalling signal.Here, in-band signalling signal generator 503 is given predetermined Bit Allocation in Discrete each the change/unaltered indication information to be provided for indicating this information in L1 static information, the configurable information of L1, L1 multidate information and the PLP0 information under controller 502 control.
Alternatively, in-band signalling signal generator 503 can distribute a bit to be used for the whole of L1 static information, the configurable information of L1, L1 multidate information and PLP0 information, to use this bit the change/unaltered indication information of this information of indication is set.
As another replacement, in-band signalling signal generator 503 can distribute a plurality of bits to be used for the whole of L1 static information, the configurable information of L1, L1 multidate information and PLP0 information, will comprise the indication information that information changes so that indication present frame which frame afterwards to be set.
In addition, controller 502 control frame generators 504 produce the frame that is used for broadcast service.Here, frame generator 504 under the control of controller 502, produce the L1 signaling that comprises lead code, send by P2, the L2 signaling (PLP0) that sends by PLP0 and the frame of at least one data PLP.
Particularly, according to embodiments of the invention, frame generator 504 receives the indication information that is provided with by in-band signalling signal generator 503, promptly, be used for indicating the change/unaltered indication information of next frame L1 static information, the configurable information of L1, L1 multidate information or PLP0 information, and this indication information be included among the specific PLP of present frame.That is, frame generator 504 produces the frame among the particular data PLP that will be included in present frame by the indication information that in-band signalling signal generator 503 is provided with.
Afterwards, frame transmitter 506 sends the frame that is produced by frame generator 504 to receiver.
According to embodiments of the invention, transmitter can use OFDM (OFDM) to send the frame that is produced.Equally, according to wireless communication system, transmitter can send the frame that is produced by code division multiple access (CDMA) or time division multiple access (TDMA).Transmitter also can use multiple-input and multiple-output (MIMO) communication plan via frame that a plurality of antenna transmission produced.
For example, when using OFDM, frame transmitter 506 can have the structure identical with the ofdm signal transmitter.Under this situation, frame transmitter 506 can by be used for the information of the broadcast service data PLP of broadcast service (that is, about) and wherein distribute the signaling PLP of control information to be mapped to the mapper of a specific subcarrier or a plurality of subcarriers, the inserter that is used for that time-domain signal is transformed to the inverse fast fourier transform device (IFFT) of frequency-region signal and is used for Cyclic Prefix (CP) is inserted into frequency-region signal sends this frame.
Though above with the transmitter illustration of Fig. 5 be described as comprising the independent assembly that is used for each function, promptly, the scheduler 501 that is used to dispatch, the controller 502 that is used to control other assemblies, the in-band signalling signal generator 503 that is used to carry out in-band signalling, the frame generator 504 that is used to produce frame, the transmission data buffer 505 that is used to cushion and the frame transmitter 506 that is used for transmit frame, but these assemblies that separate provide the restriction that is not to be read as so that explain embodiments of the invention.That is, the imagination embodiments of the invention also can realize by such transmitter, and at least some of the function of being carried out by the assembly that separates above are wherein carried out by single component, as the task of single component execution scheduler 501 and controller 502.
Fig. 6 illustrates the structure of receiver according to an embodiment of the invention.
With reference to figure 6, receiver comprises data PLP receiving element 601, signaling PLP receiving element 603, in-band signalling dector 602 and controller 604.Data PLP receiving element 601 is corresponding to the wireless signal processor in the common wireless communication system.That is, in ofdm system, data PLP receiving element 601 uses traditional ofdm signal receiving element to receive the frame that sends from transmitter.
In order to receive broadcast service, when receiver received initial frame, it came to obtain synchronously with this frame by receive lead code by the lead code receiving element (not shown) in the signaling PLP receiving element 603.In addition, receiver uses L1 signaling receiving element (not shown) to receive the L1 signaling information that sends by the P2 code element.More specifically, receiver obtains information about broadcast service network, frame length, the quantity that is used for the wireless channel of broadcast service, service identifier information, encoding rate etc. as the L1 signaling information, and checks the essential information of the broadcast service that is used to support that it will receive.In addition, the information by the annexation of each PLP of PLP0 code element transmission and broadcast service interchannel is indicated in the acquisition of receiver use L2 signaling receiving element (not shown), and inspection will receive the information of the position of data PLP at broadcast service about it.Afterwards, receiver uses the broadcast service channel that data PLP receiving element 601 receives among the data PLP that sends.
Yet, according to embodiments of the invention, when receiving non-initial frame, utilizing the indication information that extracts by in-band signalling dector 602, receiver can only receive broadcast service channel among the data PLP via data PLP receiving element 601.
More specifically, data PLP receiving element 601 can comprise the equipment of execution in conjunction with the inverse operation of the described transmitter of Fig. 5.Under this situation, receiver may further include: be used for from particular subcarriers separate the de-mapping device of the mapping code element corresponding with the information of broadcast service, the protection that is used for that frequency-region signal is transformed to the fast Fourier transformer (FFT) of time-domain signal and is used to remove CP removes device at interval.In the system that uses CDMA or TDMA radio communication system, receiver can utilize the structure corresponding with communication plan to receive data PLP.Yet,, will save its detailed description here because each structure of receiving element is not a feature of the present invention.
In-band signalling dector 602 extracts the change/unaltered indication information that is used for indicating next frame L1 static information, the configurable information of L1, L1 multidate information or PLP0 information, and this indication information is included in from the specific PLP that data PLP receiving element 601 provides.Promptly, in-band signalling dector 602 extracts indication as the configurable information of L1 static information, L1 of the L1 signaling information that sends by P2 in the next frame and the change/unaltered indication information of L1 multidate information from the specific PLP that obtains by data PLP receiving element 601, perhaps extract the in-band signalling signal as the change/unaltered indication information that is used to indicate the L2 signaling information that sends by PLP0.Equally, receiver extracts the change/unaltered indication information of indication as the L1 multidate information of the positional information of PLP identical in the next frame.
To offer controller 604 by the in-band signalling signal that in-band signalling dector 602 extracts.Controller 604 uses the in-band signalling signal at stop signaling PLP receiving element 603 that extracts, only to receive data PLP.Alternatively, controller 604 turn-on data PLP receiving elements 601 and signaling PLP receiving element 603 are to receive L1/L2 signaling information and data PLP.
More specifically, when changing when L1 static information from the indication information of in-band signalling signal extraction indication next frame, the configurable information of L1, L1 multidate information and/or by the L2 signaling information that PLP0 sends, controller 604 is opened signaling PLP receiving element 603 at the acceptance point place of L1 signaling or L2 signaling, to receive the signaling information that changes.The turn-on data PLP of the acceptance point place receiving element 601 of the data PLP that controller 604 sends after the transmission of L1 signaling or L2 signaling is so that receive the broadcast data that sends by the broadcast service channel.That is, controller 604 turn-on data PLP receiving elements 601 and signaling PLP receiving element 603 both can receive faultless broadcast data to receive L1 signaling or the L2 signaling that changes necessarily, to make.
Yet, when indication information indication L1 static information, the configurable information of L1, L1 multidate information and PLP information from in-band signalling signal extraction do not change, controller 604 cuts out signaling PLP receiving element 603 at the acceptance point place of L1 signaling or L2 signaling, and the turn-on data PLP of the acceptance point place receiving element 601 of the data PLP that sends after the transmission of L1 signaling or L2 signaling is so that receive broadcast data by the broadcast service channel.That is, when from the in-band signalling input to no change information or during the disappearance of the control information that changes, controller 604 is turn-on data PLP receiving element 601 only, receives this broadcast data to use existing control information.
As mentioned above, according to the present invention, controller 604 is checked the change/unaltered indication information (this indication information is to send by the current data PLP that is just receiving from in-band signalling dector 602) of control information in the indication next frame, and relies on this indication information selectively to open or close data PLP receiving element 601 or signaling PLP receiving element 603.In other words, controller 604 is by controlling the power consumption that receiving element 601 and 603 minimizes receiver expeditiously.In addition, because controller 604 detected the change/change of control information before the transmission of next frame, so receiver can determine inerrably to receive the broadcast service channel.
Though transmitter as Fig. 5, above with the receiver illustration of Fig. 6 be described as comprising the assembly that separates that is used for each function, be data PLP receiving element 601, signaling PLP receiving element 603, in-band signalling dector 602 and controller 604, but these assemblies that separate provide the restriction that is not to be read as so that explain embodiments of the invention.Promptly, the imagination embodiments of the invention also can be realized by such receiver, at least some of the function of being carried out by the assembly that separates are wherein carried out by single component, carry out the task of data PLP receiving element 601 and in-band signalling dector 602 as single component.
Although illustrate and describe the present invention, it will be apparent to those skilled in the art that and to carry out various changes in form and details here and do not deviate from the spirit and scope of the present invention that limit by claims and equivalent thereof with reference to some embodiment.
Claims (44)
1. method that in supporting the system of broadcast service, sends the frame that comprises control information, this system comprises frame generator and frame transmitter, this method comprises:
Produce the frame of change/unaltered indication information comprise at least one physical layer pipe (PLP) and to be used for indicating the control information of next frame broadcast service by the frame generator, this indication information is included among one of described at least one PLP; And
Send the frame that is produced by the frame transmitter.
2. method according to claim 1 is that unit changes this control information with the superframe according to broadcast service wherein, and this superframe comprises at least one frame.
3. method according to claim 2, wherein this control information is included in the configurable information that can change in each superframe.
4. method according to claim 3 comprises that also a plurality of bits that are utilized as its distribution are provided with this indication information,
Wherein these a plurality of bits are indicated the superframe that will change.
5. method according to claim 1 comprises that also a bit that is utilized as its distribution is provided with this indication information.
6. method according to claim 1 wherein is included in this indication information and will passes through among the data PLP of its broadcast data that sends broadcast service.
7. method according to claim 1 also comprises according to broadcast service based on changing this control information frame by frame.
8. method according to claim 7, wherein this control information comprises multidate information.
9. method according to claim 8, wherein this multidate information comprises the positional information of described at least one PLP.
10. method according to claim 1, wherein this control information comprises described at least one PLP and sends map information between the service channel of broadcast data of broadcast service by it.
11. a device that is used to send the frame that comprises control information in the system that supports broadcast service, this device comprises:
The frame generator produces the frame that comprises at least one physical layer pipe (PLP); With
Transmitting element is used to send the frame that is produced,
One of wherein said at least one PLP comprises the change/unaltered indication information of the control information that is used for indicating the next frame broadcast service.
12. device according to claim 11, wherein this frame comprises the superframe that comprises at least one frame.
13. device according to claim 12 also comprises scheduler, is used for operation dispatching to change configurable information based on superframe one by one.
14. device according to claim 13 also comprises:
The in-band signalling signal generator is used to distribute a plurality of bits to give indication information,
Wherein these a plurality of bits are indicated the superframe that will change.
15. device according to claim 11 also comprises:
The in-band signalling signal generator is used to distribute a bit to give indication information.
16. device according to claim 11, described one among wherein said at least one PLP comprises the data PLP that will send the broadcast data of broadcast service by it.
17. device according to claim 11 also comprises:
Scheduler is used to provide scheduling result, with according to broadcast service based on changing this control information frame by frame.
18. device according to claim 17, wherein this control information comprises multidate information.
19. device according to claim 18, wherein this control information also comprises the multidate information of the positional information that comprises described at least one PLP.
20. device according to claim 11 also comprises:
Scheduler is used to provide scheduling result to change control information, and wherein this control information comprises the map information between the service channel of described at least one PLP and broadcast data by its transmission broadcast service.
21. a method that is used to receive the frame that comprises control information in the system that supports broadcast service, this system comprises receiver and dector, and this method comprises:
Receive the frame of change/unaltered indication information comprise at least one physical layer pipe (PLP) and to be used for indicating the control information of next frame broadcast service by receiver, this indication information is included among one of described at least one PLP;
Extract this indication information by dector; And
Determine to receive control information in the next frame, still be receiving data information and do not receive control information in the next frame based on the indication information that extracts.
22. method according to claim 21, wherein this frame comprises the superframe that comprises at least one frame according to broadcast service.
23. method according to claim 22, wherein this control information comprises configurable information, and it is based on superframe change one by one.
24. method according to claim 23 comprises that also a plurality of bits that are utilized as its distribution are provided with this indication information,
Wherein these a plurality of bits are indicated the superframe that will change.
25. method according to claim 21 comprises that also a bit that is utilized as its distribution is provided with this indication information.
26. method according to claim 21 wherein is included in this indication information and will passes through among the data PLP of its broadcast data that sends broadcast service.
27. method according to claim 21 also comprises according to broadcast service based on changing this control information frame by frame.
28. method according to claim 27, wherein this control information comprises multidate information.
29. method according to claim 28, wherein this multidate information comprises the positional information of described at least one PLP.
30. method according to claim 21, wherein this control information comprises described at least one PLP and sends map information between the service channel of broadcast data of broadcast service by it.
31. method according to claim 21 also comprises:
When control information does not change in the indication information indication next frame that extracts, be closed in the receiving element of its place's receiving control information; And
Be open at the receiving element of its place's receiving data information.
32. method according to claim 21 also comprises:
When control information changes in the indication information indication next frame that extracts, be open at the receiving element of its place's receiving control information;
Receive the control information that changes; And
Be open at the receiving element that its place receives the data message corresponding with the control information that changes.
33. a device that is used to receive the frame that comprises control information in the system that supports broadcast service, this device comprises:
Receiving element receives the frame of change/unaltered indication information comprise at least one physical layer pipe (PLP) and to be used for indicating the control information of next frame broadcast service, and this indication information is included among one of described at least one PLP;
The in-band signalling dector is used to extract this indication information; And
Controller, be used for based on the indication information that extracts determine to receive next frame control information, still be receiving data information and receiving control information not, and selectively open or close receiving element.
34. device according to claim 33, wherein this frame comprises the superframe that comprises at least one frame.
35. device according to claim 34 wherein is provided with this indication information changing configurable information, and the in-band signalling dector extracts this indication information based on superframe one by one.
36. device according to claim 35, wherein this indication information comprises a plurality of bits of the superframe that indication will change.
37. device according to claim 33, wherein this indication information comprises a bit.
38. device according to claim 33, described one among wherein said at least one PLP comprises the data PLP that will send the broadcast data of broadcast service by it.
39. device according to claim 33 wherein is provided with this indication information with based on changing this control information frame by frame.
40. according to the described device of claim 39, wherein this control information comprises multidate information.
41. according to the described device of claim 40, wherein this multidate information comprises the positional information of described at least one PLP.
42. device according to claim 33, wherein this control information comprises described at least one PLP and sends map information between the service channel of broadcast data of broadcast service by it.
43. device according to claim 33, wherein when control information did not change in this indication information indication next frame, controller was closed in the receiving element of its place's receiving control information, and is open at the Data Receiving unit of its place's receiving data information.
44. device according to claim 33, wherein when control information changes in this indication information indication next frame, controller is open at the signaling receiving element of its place's receiving control information, and is open at the Data Receiving unit that its place receives the data message corresponding with the control information of the change that receives by the signaling receiving element.
Applications Claiming Priority (7)
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| KR10-2008-0024086 | 2008-03-14 | ||
| KR1020080024086A KR101162805B1 (en) | 2008-02-21 | 2008-03-14 | Apparatus and method for transmitting/receiving control information in a wireless digital broadcasting system |
| PCT/KR2009/000825 WO2009104927A2 (en) | 2008-02-21 | 2009-02-20 | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
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| CN101953133A true CN101953133A (en) | 2011-01-19 |
| CN101953133B CN101953133B (en) | 2014-12-10 |
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| JP (1) | JP5175942B2 (en) |
| KR (1) | KR101162805B1 (en) |
| CN (1) | CN101953133B (en) |
| AU (1) | AU2009216037B2 (en) |
| ES (2) | ES2677345T3 (en) |
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| CN106464640A (en) * | 2015-03-24 | 2017-02-22 | Lg 电子株式会社 | Device and method for transmitting and receiving broadcast signal |
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| EP2597805A4 (en) * | 2011-06-24 | 2013-07-24 | Panasonic Corp | Transmission device, transmission method, receiving device and receiving method |
| KR101869222B1 (en) * | 2013-09-15 | 2018-07-19 | 엘지전자 주식회사 | Broadcast receiving device and method for operating the same |
| CN107078847B (en) * | 2015-02-04 | 2020-10-23 | Lg 电子株式会社 | Apparatus and method for transceiving broadcast signals |
| JP2017011689A (en) * | 2015-06-19 | 2017-01-12 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | Transmission method, reception method, transmission device and reception device |
| EP4340508A2 (en) * | 2015-06-19 | 2024-03-20 | Panasonic Intellectual Property Corporation of America | Transmitting method, receiving method, transmitting apparatus and receiving apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101162805B1 (en) | 2012-07-05 |
| AU2009216037A1 (en) | 2009-08-27 |
| JP2011517377A (en) | 2011-06-02 |
| RU2450474C2 (en) | 2012-05-10 |
| ES2677344T3 (en) | 2018-08-01 |
| KR20090090968A (en) | 2009-08-26 |
| AU2009216037B2 (en) | 2013-05-02 |
| ES2677345T3 (en) | 2018-08-01 |
| RU2010134894A (en) | 2012-02-27 |
| CN101953133B (en) | 2014-12-10 |
| MY157527A (en) | 2016-06-15 |
| JP5175942B2 (en) | 2013-04-03 |
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