CN101170775A - A method and terminal for receiving emergent broadcast under dormancy status - Google Patents
A method and terminal for receiving emergent broadcast under dormancy status Download PDFInfo
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- CN101170775A CN101170775A CNA2007101774391A CN200710177439A CN101170775A CN 101170775 A CN101170775 A CN 101170775A CN A2007101774391 A CNA2007101774391 A CN A2007101774391A CN 200710177439 A CN200710177439 A CN 200710177439A CN 101170775 A CN101170775 A CN 101170775A
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Abstract
The invention discloses a method for receiving emergency announcement under sleeping state and a terminal thereof. The method comprises a terminal under sleeping state determines the starting time of an searching interval at regular intervals according to the receiving signal synchronizing with a receiving signal set in the terminal, and receives the searching interval when it is indicated that the searching interval has an emergency announcement. The terminal comprises a decoding module for receiving signal from a broadcasting network; a control module for closing the decoding module when there is no broadcasting command from an application layer, determining the starting time of the searching interval once the decoding module is turned off for a certain time TW according to the information of the receiving signal synchronizing with the receiving signal set in the terminal and awaking the decoding module to receive the searching interval, and judging whether there is an emergency announcement in the searching interval, and if yes, instructing the decoding module to receive. By the invention, the mobile terminal can receive emergency announcement even under sleeping state. And, the invention has electricity-saving effect.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of in resting state the method and the terminal of receiving emergent broadcast.
Background technology
In existing mobile multimedia broadcast system, include several TS (Time Slot, time slot) in the frame, comprise a beacon and some OFDM (OFDM) symbol in each time slot, data and control information are carried on these time slots.
The broadcast channel physical layer provides broadcast channel by physical layer logic channel PLCH for upper-layer service; The physical layer logic channel is divided into control logic channel CLCH and service logical channels SLCH; Wherein the control logic channel is used to carry the broadcast system control information, and service logical channels is used to carry broadcasting service; Receiving-transmitting sides is appointed the time slot that control logic channel and service logical channels take separately in advance.The time slot of control logic channel occupancy is called the index time slot; For example, in existing China Mobile multimedia broadcasting CMMB, physical layer has only a fixing control logic channel, and this logic channel takies a time slot, with first time slot TS0 of each frame as this index time slot.
Under some situation, some important informations need be sent to terminal as early as possible, make the user can in time receive these information, these information are called urgent broadcast, comprising warning information, user related information and system information etc., can be written form, or other multimedia form.The transmission of urgent broadcast can continue for some time, such as 5 minutes; Send in the frame of urgent broadcast, in the index time slot, include indication information, belong to urgent broadcast to make things convenient for terminal to recognize this frame.
And at present when portable terminal when being in resting state, decoder module comprises that receive channel and decoding circuit all can be closed, to save electric energy.Therefore during this period, can't receiving emergent broadcast.And if the user can not in time receive urgent broadcast, gently normal receiving multimedia broadcast business then also may cause the loss of life danger or property when serious.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of in resting state the method and the terminal of receiving emergent broadcast, thereby make the portable terminal also can receiving emergent broadcast when dormancy, reach power savings simultaneously.
For solving the problems of the technologies described above, the invention provides a kind of in resting state the method for receiving emergent broadcast, comprising:
Terminal at regular intervals, is determined zero hour of index time slot according to the received signal information that changes synchronously with received signal that is provided with in this terminal when being in resting state, the reception hint time slot receives when index time slot middle finger is shown with urgent broadcast.
Further, described method specifically may further comprise the steps:
Behind A, the starting terminal, the received signal information that received signal changes synchronously is set in this terminal;
B, when not having the playing request order, carry out step C;
C, terminal enter resting state;
Behind D, the dormancy certain hour, terminal is determined zero hour of index time slot, reception hint time slot according to described received signal information; If index time slot middle finger is shown with urgent broadcast then receives; Otherwise return C.
Further, in the described steps A, the received signal information that changes synchronously with received signal is set is meant: terminal according to received signal in the same frequency of time slot frequency begin the time slot counting, and when count value reaches N, start from scratch and count again.
Further, described step C comprises: close decoder module;
Among the step D, terminal is determined zero hour of index time slot according to the time slot count value, and the reception hint time slot is meant: according to the time slot count value, X time slot wakes decoder module reception hint time slot the zero hour up in frame;
Time span T between the zero hour of described X time slot to its place frame end moment
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value.
Further, in the described steps A, the received signal information that changes synchronously with received signal is set also refers to: terminal carry out with received signal in the symbol count of sign synchronization, and the counting again of when count value reaches M+1, starting from scratch; Described symbol comprises OFDM symbol and beacon;
Described step C comprises: close decoder module;
Among the step D, terminal is determined zero hour of index time slot according to the time slot count value, and the reception hint time slot is meant: according to time slot count value and symbol count value, wake decoder module reception hint time slot in X time slot during Y sign-on up in frame;
The method that described X determines is: the zero hour of X time slot is to the time span T between the zero hour of next index time slot in the frame
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value;
Definite method of described Y is: Y sign-on constantly and the time span of next index time slot between the zero hour more than or equal to Δ T, and Y+1 sign-on moment and the time span of next index time slot between the zero hour are less than Δ T.
Further, also comprise among the described step C: reset when terminal enters resting state and start a timer;
Among the described step D, be meant behind the dormancy certain hour: timer then after.
Further, the time span of described timer setting is 10 to 120 seconds.
The present invention also provide a kind of in resting state the terminal of receiving emergent broadcast, comprise decoder module, control module; Described decoder module comprises receive channel and decoding circuit, is used for from the radio network received signal; Described control module is used for closing decoder module when not having the order of application layer playing request;
It is characterized in that: described control module also is used for whenever closing certain time interval T at decoder module
WAfter, determine zero hour of index time slot to wake decoder module reception hint time slot up according to the received signal information that changes synchronously with received signal that is provided with in this terminal; Be used for also judging whether the index time slot has indicated urgent broadcast, if having then the reception of instruction decoding module.
Further, described control module also is used for behind starting up of terminal the signal that receives according to decoder module, in this terminal, be provided with one with the received signal received signal information of variation synchronously; Also be used for closing described decoder module when indication does not have urgent broadcast when the index time slot.
Further, described terminal also comprises counter; Described counter comprises time slot counter at least;
Described control module is provided with a received signal information that changes synchronously with received signal and is meant in this terminal: the signal that control module receives according to decoder module, with the frequency configuration of described time slot counter is consistent with the frequency of time slot in the received signal, the zero hour of each time slot count value add 1, and when its count value arrives N with its zero clearing.
Further, described control module is determined to be meant the zero hour of index time slot according to described received signal information: control module inquiry time slot counter, wake decoder module reception hint time slot up when its count value arrives the count value of X time slot correspondence;
Time span T between the zero hour of described X time slot to its place frame end moment
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value.
Further, described counter also comprises symbol counter;
Described control module is provided with a received signal information that changes synchronously with received signal and also refers in this terminal: control module make described symbol counter the zero hour of each symbol count value add 1, and when its count value arrives M+1 with its zero clearing;
Described control module is determined to be meant the zero hour of index time slot according to described received signal information: the count value in the control module inquiry time slot counter, when arriving the count value of X time slot correspondence, count value in the query token counter is waken decoder module reception hint time slot up when arriving the count value of Y symbol correspondence;
Time span T between the zero hour of described X time slot to its place frame end moment
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value;
Described Y sign-on constantly and the time span of next index time slot between the zero hour more than or equal to Δ T, and Y+1 sign-on moment and the time span of next index time slot between the zero hour are less than Δ T.
Further, described terminal also comprises timer, is used for the time interval of waking decoder module up is carried out timing;
Described control module also is used for resetting at every turn and starting this doze output when closing decoder module, and learns then that at this doze output decoder module closed certain hour.
Further, the time span of described timer setting is 10 to 120 seconds.
Technical scheme of the present invention can make portable terminal also can receive urgent broadcast when dormancy, and still can economize on electricity; Prioritization scheme of the present invention can also make the running time of decoder module in the portable terminal short as much as possible, thereby saves electric energy under the prerequisite of reliable reception urgent broadcast to greatest extent.
Description of drawings
Fig. 1 be of the present invention in resting state the concrete implementing procedure figure of the method for receiving emergent broadcast;
Fig. 2 be of the present invention in resting state the concrete enforcement block diagram of the terminal of receiving emergent broadcast;
Fig. 3 is the flow chart of application example of the present invention;
Fig. 4 is decoder module opening time schematic diagram in the application example of the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Core concept of the present invention is: be to ensure the reception of urgent broadcast, need make the terminal still can be synchronous with received signal under resting state; Among the present invention, when terminal entered resting state, the received signal information that changes synchronously with received signal that is provided with in this terminal according to received signal in the time of still can be by normal receive was determined the zero hour of index time slot.After terminal entered resting state, at regular intervals, according to described received signal message pick-up one secondary index time slot, and whether inquiry had urgent broadcast; If there is not urgent broadcast, then after receiving the index time slot, continue to enter resting state; Otherwise receiving emergent broadcast.Terminal can also be determined the zero hour of index time slot when the dormancy according to described received signal information, therefore can spend the too many time waiting on the index time slot, thereby guaranteed at utmost to economize on electricity under the prerequisite of terminal still good urgent broadcast excessively when dormancy.
For convenient explanation to the embodiment of the invention, suppose to comprise N time slot in the frame, comprise M OFDM symbol and a beacon in each time slot, for convenience of description, hereinafter OFDM symbol and beacon in the time slot are referred to as symbol; The length of a time slot is T.
Provided by the present invention in resting state the method for receiving emergent broadcast, its embodiment may further comprise the steps as shown in Figure 1:
A, starting terminal are realized synchronously with received signal; Terminal is provided with a received signal information that changes synchronously with received signal according to received signal in this terminal.
When terminal enters resting state, just can determine the zero hour of index time slot according to described received signal information.
In the described steps A of the embodiment of the invention, terminal is provided with received signal information according to received signal and is meant: terminal is carried out the time slot counting according to the frequency the same with time slot frequency in the received signal, and the counting again of starting from scratch when count value reaches N.
In the described steps A of the embodiment of the invention, terminal is provided with received signal information according to received signal and can also comprises: terminal carry out with received signal in the symbol count of sign synchronization, and the counting again of when count value reaches M+1, starting from scratch.
Therefore after received signal information was set, even do not receiving under the situation of signal, terminal also continued counting, can rely on count value learn at present to receive which time slot/symbol, thereby determined index time slot zero hour.
The described steps A of the embodiment of the invention specifically can but be not limited to realize in the following manner: synchronous with received signal behind the starting terminal, the control module in the terminal is provided with counter according to the signal that decoder module receives.The described counter of the embodiment of the invention can but be not limited to drive with the high precision clock source.
The described counter of the embodiment of the invention comprises time slot counter at least, can also comprise symbol counter; Described control module makes the slot synchronization in time slot counter and the received signal, makes the sign synchronization in symbol counter and the received signal.
In the described steps A of the embodiment of the invention, described time slot counter is used to locate the moment of at every turn waking decoder module up, and symbol counter is used for moment of further accurately determining to wake up decoder module.
In the described steps A of the embodiment of the invention, described control module makes time slot counter be meant with slot synchronization in the received signal: described control module with the frequency configuration of described time slot counter for received signal in the frequency of time slot consistent, and make its zero hour (also being the finish time of a last time slot) count value add 1 at each time slot, and when its count value arrives N with its zero clearing; Can also but be not limited to make described time slot counter first time slot from receive frame---begin when being TS0 the counting, can certainly from receive any time slot begin the counting; Control module just can know currently can receive which time slot in the frame by the count value in the time slot counter like this.
In the described steps A of the embodiment of the invention, described control module is meant the sign synchronization in symbol counter and the received signal: described control module make symbol counter the zero hour of each symbol (also being the finish time of a last symbol) count value add 1, and when its count value arrives M+1 with its zero clearing; Can also but be not limited to make described symbol counter first sign-on counting from receive time slot, can certainly begin counting when receiving any symbol; Control module just can know currently can receive which symbol in the time slot by the count value in the symbol counter like this.
When having symbol counter, the count value that can at every turn work as symbol counter arrives M+1 makes time slot counter add 1.
In the described steps A of the embodiment of the invention, terminal is provided with received signal information according to received signal and also can be meant: terminal is provided with a timer, and its time span regularly is identical with the time span of a frame; Terminal starts this timer in the zero hour of index time slot, after this reset after then at every turn and start this timer once more.
In the described steps A of the embodiment of the invention, terminal is provided with received signal information according to received signal and can also be meant: terminal is provided with a timer, start this timer in the zero hour of index time slot, when the time span of the time span of its timing and a frame is identical with its zero clearing and start this timer once more.
Because the fixed-site of index time slot in every frame, so terminal just can be determined the zero hour of index time slot according to timer or timer.The method that received signal information is set by timer or timer is not limited to top description, and the method that meets this realization thought can adopt.
Compare with the mode that adopts timer or timer, adopt the mode of tracking frequency, it is more accurate promptly to adopt counter to be used as received signal information.
If B does not have the playing request order of application layer, then carry out step C; If the playing request order is arranged, then play, carry out step B after the broadcast again.
C, terminal enter resting state; Terminal can also pick up counting simultaneously.
Among the described step C of the embodiment of the invention, when entering resting state, terminal closes decoder module; Also can close application module AP this moment.
Terminal pick up counting simultaneously specifically can but be not limited to be meant: when closing decoder module, reset and start a timer, for steps A in the timer mentioned distinguish mutually, this timer is called doze output.
After decoder module was closed, because received signal information still changes synchronously with received signal, so can guarantee when decoder module does not receive external signal, terminal still can obtain correct TS information.
The described doze output of the embodiment of the invention is used for waking the time interval of decoder module up---and be the time T of each dormancy
wCarry out timing, its time length is predetermined, and the method for determining is to get a compromise value in economize on electricity and reliability, and too little if this time is obtained, then decoder module can frequently be waken up, and can't reach the target of economize on electricity; If this time is obtained the lasting transmitting time greater than each urgent broadcast, then may make terminal miss urgent broadcast; The time of described doze output can be set between 10 to 120 seconds.
D, dormancy certain time interval T
WAfter, terminal is determined zero hour of index time slot according to described received signal information, thus the reception hint time slot; Whether indicated urgent broadcast in the terminal judges index time slot, if having then receive, otherwise, after receiving the index time slot, return step C.
Among the described step D of the embodiment of the invention, certain time interval T
WAfter can be meant described doze output then after.
Among the described step D of the embodiment of the invention, after terminal is determined the zero hour of index time slot according to count value, wake decoder module reception hint time slot up.
Among the described step D of the embodiment of the invention, need guarantee when the reception hint time slot, decoder module is a starting state, therefore consider that the decoder module startup needs the time, counter may produce drift in a small amount in addition, so can before receiving the index time slot, wake described decoder module up, make decoder module after startup, just can receive the index time slot.
The hypothesis decoding module adds that guard time is Δ T start-up time; To be start-up time decoder module finish from being waken up to that to start the needed time different because of terminal to decoder module, can obtain by actual measurement; The described guard time of the embodiment of the invention is used to revise count value, and drift back decoder module still can start before receiving the index time slot to guarantee producing in a small amount by counter, and its length is determined according to system's actual measurement or emulation; Δ T determines that in emission system and terminal the back is just confirmable.
Fairly simple scheme is the dormancy certain time interval T
WAfter, terminal is according to the time slot count value, and X time slot wakes decoder module reception hint time slot the zero hour up in frame.The choosing method of described X is: the zero hour that guarantees X time slot in the frame is to the time span T between the zero hour of next index time slot
XMore than or equal to Δ T; This scheme can guarantee that decoder module finishes startup before next index time slot arrives, but work as T after waking up
XDuring＞Δ T, understand some the running time of decoder module and be wasted in the wait; The choosing method of optimizing some is T
XJust more than or equal to Δ T, the implication of " just greater than " is T
XWith the difference of Δ T less than T.
Above-mentioned simple scheme specifically can but be not limited to comprise: control module doze output then after, by the count value of inquiry time slot counter, X time slot wakes decoder module reception hint time slot the zero hour up in frame.In the practical application, can be earlier determine the count value of X time slot correspondence, and this count value is stored in the control module according to Δ T and the time slot that begins to count; Described doze output then after, the count value in the control module inquiry time slot counter is waken decoder module reception hint time slot up when arriving the count value of X time slot correspondence.
And optimum scheme X time slot (T after the zero hour in frame
X-Δ T) constantly wakes up, can determine (T with symbol counter
X-Δ T) length, Y sign-on in X time slot wakes decoder module reception hint time slot constantly up.The choosing method of described Y is: guarantee in the time slot that Y the sign-on moment and the time span of this time slot between the zero hour are less than or equal to (T
X-Δ T), and Y+1 sign-on constantly and the time span of this time slot between the zero hour greater than (T
X-Δ T); Certainly choosing method also can be: Y sign-on constantly and the time span of next index time slot between the zero hour more than or equal to Δ T, and Y+1 sign-on moment and the time span of next index time slot between the zero hour are less than Δ T.
Above-mentioned prioritization scheme specifically can but be not limited to comprise: the dormancy certain time interval T
WAfter, terminal is according to time slot count value and symbol count value, and Y sign-on of X time slot wakes decoder module reception hint time slot constantly up in frame; This scheme is that the Δ T before receiving the index time slot wakes decoder module reception hint time slot constantly up, thereby makes the time of decoder module operation short as far as possible when guaranteeing reliability.
Above-mentioned prioritization scheme further can specifically comprise: control module doze output then after, determine the zero hour of X time slot in the frame by the count value of inquiry time slot counter, and after this zero hour the count value of query token counter, determine the zero hour of Y symbol in this time slot, and wake decoder module reception hint time slot constantly up at this.In the practical application, can be earlier determine X time slot and Y each self-corresponding count value of symbol and be stored in the control module according to Δ T and the time slot that begins to count, symbol, the count value of control module in doze output back inquiry then time slot counter, when arriving the count value of X time slot correspondence, count value in the query token counter is waken decoder module reception hint time slot up when arriving the count value of Y symbol correspondence.
Certainly, also can finish (T in the practical application with a timer
XDetermining-Δ T) in order to be different from the timer of preamble, is called back off timer with this timer; The time of back off timer is made as (T
X-Δ T), then above-mentioned prioritization scheme specifically comprises: the count value of control module in doze output back inquiry then time slot counter, when arriving the count value of X time slot correspondence, reset and start back off timer, and wake decoder module reception hint time slot then up at back off timer.
Among the described step D of the embodiment of the invention, carry out respective handling behind the receiving emergent broadcast, can but be not limited to wake up that application layer module is handled or the prompting user responds this urgent broadcast; If urgent broadcast is carried out do not need to use decoder module in the process of respective handling, then also can execution in step C.In the practical application, if user's response within a certain period of time can also be set, or after application layer module disposes, execution in step C.
Implementation when adopting the mode of timer or timer to represent received signal information similar when adopting counter repeats no more here.
The present invention also provide a kind of in resting state the terminal of receiving emergent broadcast, as shown in Figure 2, comprise decoder module, control module, can also comprise counter, timer.
The described decoder module of the embodiment of the invention comprises receive channel and decoding circuit, is used for from the radio network received signal.
The described control module of the embodiment of the invention is used for behind starting up of terminal the signal that receives according to decoder module, in this terminal, be provided with one with the received signal received signal information of variation synchronously; Also be used for when having the order of application layer playing request, not making terminal enter resting state---close decoding circuit; Also be used for closing certain time interval T at decoder module
WAfter, determine zero hour of index time slot to wake decoder module reception hint time slot up according to described received signal information; Be used for also judging whether the index time slot has indicated urgent broadcast,, then after receiving the index time slot, to close decoder module if having then the reception of instruction decoding module.
The described terminal of the embodiment of the invention can also comprise timer.
The described timer of the embodiment of the invention comprises doze output, is used for waking the time interval T of decoder module up
WCarry out timing, described T
WSelection with the same in the method, repeat no more here.
The described control module of the embodiment of the invention also is used for resetting at every turn and starting this doze output when closing decoder module, and judges the time of closing decoder module according to this doze output, learns decoder module then when it and has closed certain time interval T
W
The described terminal of the embodiment of the invention can also comprise counter.
The described counter of the embodiment of the invention can but be not limited to drive by the high precision clock source, comprise time slot counter at least, can also comprise symbol counter.Described time slot counter is used to locate the moment of at every turn waking decoder module up, and symbol counter is used for moment of further accurately determining to wake up decoder module.
The described control module of the embodiment of the invention is provided with a received signal information that changes synchronously with received signal and is meant in this terminal: control module is provided with counter according to the signal that decoder module receives, and makes itself and received signal synchronous.
The described control module of the embodiment of the invention is used for according to the signal that decoder module receives counter being set, make its with received signal synchronously specifically can but be not limited to comprise: control module with the frequency configuration of described time slot counter for received signal in the frequency of time slot consistent, the zero hour of each time slot (also being the finish time of a last time slot) count value add 1, and when its count value arrives N with its zero clearing; Can also indicate described time slot counter from receive frame, to begin counting during first time slot.
The described control module of the embodiment of the invention is used for according to the signal that decoder module receives counter being set, itself and received signal can also be comprised synchronously: control module make described symbol counter the zero hour of each symbol (also being the finish time of a last symbol) count value add 1, and when its count value arrives M+1 with its zero clearing; Can also comprise and make described symbol counter from receive time slot, begin counting during first symbol.When having symbol counter, the count value arrival M+1 that control module also can be worked as symbol counter at every turn makes time slot counter add 1.
The described control module of the embodiment of the invention is determined the zero hour of index time slot according to described received signal information, wake up decoder module reception hint time slot can but be not limited to be meant: the count value in the control module inquiry time slot counter, when arriving the count value of X time slot correspondence, count value in the query token counter is waken decoder module reception hint time slot up when arriving the count value of Y symbol correspondence.The meaning of concrete analysis and each parameter repeats no more with consistent described in the method.
The same with above-mentioned method, the described control module of the embodiment of the invention also can only be inquired about time slot counter then at timer, wakes decoder module reception hint time slot when its count value arrives the count value of X time slot correspondence up.
The described timer of the embodiment of the invention can also comprise back off timer, is used for (T
X-Δ T) carries out timing.The described control module of the embodiment of the invention can be in the count value in the doze output back inquiry then time slot counter, when arriving the count value of X time slot correspondence, reset and start back off timer, and wake decoder module reception hint time slot then up at back off timer.
With the same in the method, the described control module of the embodiment of the invention is provided with a received signal information that changes synchronously with received signal and also can realizes with a timer or a timer in this terminal, repeat no more here.
Further be illustrated with an application example of the present invention below.
Should be with in the example, each frame comprises 40 time slots, is respectively TS0～TS39, and each slot length T is 25ms; Comprise 53 OFDM symbols and a beacon in each time slot, totally 54 symbols, beacon is placed on the first place in the time slot, and should be with in the example, beacon length be identical with the OFDM symbol; Decoder module starts the required time and adds guard time altogether for 35ms; The index time slot is TS0.
As shown in Figure 3, should may further comprise the steps with example:
A, wireless terminal start, and the signal that control module receives according to decoder module is provided with time slot counter, symbol counter; Control module begins counting when making the beacon of symbol counter from receive time slot, add 1 in the synchronization count value of a sign-on, and arrive at 54 o'clock with its zero clearing in count value, and make time slot counter add 1; Arrive at 40 o'clock with its zero clearing in the time slot counter count value.
B, judge whether the playing request order of application layer, if having then continue to play and continue step b playing the back; If do not have then execution in step c;
C, terminal enter resting state, and control module is closed decoder module, and reset when closing and start timer; Described timer is set to 60 seconds.
D, timer then after, control module is at first inquired about the count value of time slot counter.
Should be with in the example, Δ T=35ms will guarantee the time span T between zero hour to its place frame end moment of X time slot
XJust greater than Δ T, so X should be 39, and T
XBe 50ms; (T
X-Δ T) be 15ms, the time interval between the zero hour (i.e. the finish time of the 32nd symbol) of the 33rd symbol (i.e. the 32nd OFDM symbol) and the zero hour of X time slot is 14.8ms, less than (T
X-Δ T), and the time interval between the zero hour of the zero hour of the 34th symbol and X time slot is 15.3ms, greater than (T
X-Δ T), therefore select Y=33.
Should be with in the example, the count value of the 39th time slot correspondence is 38; Therefore inquire about time slot counter, if its count value is not equal to 38 then continue inquiry, if equal 38, execution in step e then; It is pointed out that if adopt fairly simple scheme promptly control module is by the count value of inquiry time slot counter, the 39th time slot (being TS38) just wakes up the zero hour in frame, then do not need to carry out step e here, directly execution in step f.
The count value of e, control module query token counter, the count value of if symbol counter are not equal to 33 and continue inquiry, if equal 33, represent the 33rd sign-on, execution in step f.
F, control module are waken decoder module up; After decoder module starts, receive the information among the TS0, judged whether urgent broadcast,, and wake the application layer module processing up if having then receives; Otherwise, after receiving TS0, return step c.
As from the foregoing, adopt prioritization scheme after, decoder module is waken up the back at every turn and continues time of starting as shown in Figure 4, only be T+ Δ T=25ms+35ms=60ms, so just can save electric energy to greatest extent under the prerequisite of good urgent broadcast.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (14)
1. the method for a receiving emergent broadcast in resting state is characterized in that, comprising:
Terminal at regular intervals, is determined zero hour of index time slot according to the received signal information that changes synchronously with received signal that is provided with in this terminal when being in resting state, the reception hint time slot receives when index time slot middle finger is shown with urgent broadcast.
2. the method for claim 1 is characterized in that, specifically may further comprise the steps:
Behind A, the starting terminal, the received signal information that changes synchronously with received signal is set in this terminal;
B, when not having the playing request order, carry out step C;
C, terminal enter resting state;
Behind D, the dormancy certain hour, terminal is determined zero hour of index time slot, reception hint time slot according to described received signal information; If index time slot middle finger is shown with urgent broadcast then receives; Otherwise return C.
3. method as claimed in claim 2, it is characterized in that, in the described steps A, the received signal information that changes synchronously with received signal is set is meant: terminal according to received signal in the same frequency of time slot frequency begin the time slot counting, and when count value reaches N, start from scratch and count again.
4. method as claimed in claim 3 is characterized in that described step C comprises: close decoder module;
Among the step D, terminal is determined zero hour of index time slot according to the time slot count value, and the reception hint time slot is meant: according to the time slot count value, X time slot wakes decoder module reception hint time slot the zero hour up in frame;
Time span T between the zero hour of described X time slot to its place frame end moment
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value.
5. method as claimed in claim 3, it is characterized in that, in the described steps A, the received signal information that changes synchronously with received signal is set also refers to: terminal carry out with received signal in the symbol count of sign synchronization, and the counting again of when count value reaches M+1, starting from scratch; Described symbol comprises OFDM symbol and beacon;
Described step C comprises: close decoder module;
Among the step D, terminal is determined zero hour of index time slot according to the time slot count value, and the reception hint time slot is meant: according to time slot count value and symbol count value, wake decoder module reception hint time slot in X time slot during Y sign-on up in frame;
The method that described X determines is: the zero hour of X time slot is to the time span T between the zero hour of next index time slot in the frame
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value;
Definite method of described Y is: Y sign-on constantly and the time span of next index time slot between the zero hour more than or equal to Δ T, and Y+1 sign-on moment and the time span of next index time slot between the zero hour are less than Δ T.
6. as each described method in the claim 2 to 5, it is characterized in that, also comprise among the described step C: reset when terminal enters resting state and start a timer;
Among the described step D, be meant behind the dormancy certain hour: timer then after.
7. method as claimed in claim 6 is characterized in that: the time span of described timer setting is 10 to 120 seconds.
8. the terminal of a receiving emergent broadcast in resting state comprises decoder module, control module; Described decoder module comprises receive channel and decoding circuit, is used for from the radio network received signal; Described control module is used for closing decoder module when not having the order of application layer playing request;
It is characterized in that: described control module also is used for whenever closing certain time interval T at decoder module
WAfter, determine zero hour of index time slot to wake decoder module reception hint time slot up according to the received signal information that changes synchronously with received signal that is provided with in this terminal; Be used for also judging whether the index time slot has indicated urgent broadcast, if having then the reception of instruction decoding module.
9. terminal as claimed in claim 8 is characterized in that, described control module also is used for behind starting up of terminal the signal that receives according to decoder module, in this terminal, be provided with one with the received signal received signal information of variation synchronously; Also be used for closing described decoder module when indication does not have urgent broadcast when the index time slot.
10. terminal as claimed in claim 9 is characterized in that, also comprises counter; Described counter comprises time slot counter at least;
Described control module is provided with a received signal information that changes synchronously with received signal and is meant in this terminal: the signal that control module receives according to decoder module, with the frequency configuration of described time slot counter is consistent with the frequency of time slot in the received signal, the zero hour of each time slot count value add 1, and when its count value arrives N with its zero clearing.
11. terminal as claimed in claim 10, it is characterized in that, described control module is determined to be meant the zero hour of index time slot according to described received signal information: control module inquiry time slot counter, wake decoder module reception hint time slot up when its count value arrives the count value of X time slot correspondence;
Time span T between the zero hour of described X time slot to its place frame end moment
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value.
12. terminal as claimed in claim 10 is characterized in that: described counter also comprises symbol counter;
Described control module is provided with a received signal information that changes synchronously with received signal and also refers in this terminal: control module make described symbol counter the zero hour of each symbol count value add 1, and when its count value arrives M+1 with its zero clearing;
Described control module is determined to be meant the zero hour of index time slot according to described received signal information: the count value in the control module inquiry time slot counter, when arriving the count value of X time slot correspondence, count value in the query token counter is waken decoder module reception hint time slot up when arriving the count value of Y symbol correspondence;
Time span T between the zero hour of described X time slot to its place frame end moment
XMore than or equal to Δ T; Described Δ T adds guard time start-up time for decoder module; Described guard time is used to revise count value;
Described Y sign-on constantly and the time span of next index time slot between the zero hour more than or equal to Δ T, and Y+1 sign-on moment and the time span of next index time slot between the zero hour are less than Δ T.
13., it is characterized in that: also comprise timer, be used for the time interval of waking decoder module up is carried out timing as each described terminal in the claim 9 to 12;
Described control module also is used for resetting at every turn and starting this doze output when closing decoder module, and learns then that at this doze output decoder module closed certain hour.
14. terminal as claimed in claim 13 is characterized in that: the time span of described timer setting is 10 to 120 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101774391A CN101170775A (en) | 2007-11-15 | 2007-11-15 | A method and terminal for receiving emergent broadcast under dormancy status |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101774391A CN101170775A (en) | 2007-11-15 | 2007-11-15 | A method and terminal for receiving emergent broadcast under dormancy status |
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| Publication Number | Publication Date |
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| CN101170775A true CN101170775A (en) | 2008-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101774391A Pending CN101170775A (en) | 2007-11-15 | 2007-11-15 | A method and terminal for receiving emergent broadcast under dormancy status |
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| Country | Link |
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| CN (1) | CN101170775A (en) |
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| WO2010031287A1 (en) * | 2008-09-22 | 2010-03-25 | 华为技术有限公司 | Method, system and device for warning in public emergency broadcasting system |
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