CN101247326B - Wireless transmission device and correlated method - Google Patents
Wireless transmission device and correlated method Download PDFInfo
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- CN101247326B CN101247326B CN200710084930XA CN200710084930A CN101247326B CN 101247326 B CN101247326 B CN 101247326B CN 200710084930X A CN200710084930X A CN 200710084930XA CN 200710084930 A CN200710084930 A CN 200710084930A CN 101247326 B CN101247326 B CN 101247326B
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Abstract
The invention relates to a wireless transmission method for broadcasting groups to a plurality of receive devices, which includes that: the a plurality of the groups are broadcasted to the receive devices; signals transmitted by the receive devices are received, a plurality of estimated results are generated by the signals which are transmitted by the receive devices, every estimated result corresponds to receive quality of the groups received by every receive device.; every receive device is determined whether the groups are received by the receive device or not according to every estimated result and a receive condition, and at least one of the receive devices for receiving the groups is applicably stored; information corresponding to at least one of the receive device is judged whether a broadcasted group is necessarily re-received or not according to the information and the signal transmitted by at least one of the receive device which is applicable to receive the groups.
Description
Technical field
The present invention relates to a kind of radio transmitting device and method, relate in particular to a kind of radio transmitting device and method that can be used to carry out data broadcasting.
Background technology
Generally speaking; Point-to-point data transfer mode transfers to receiving system by wireless network access point with the form of divide into groups (packet) in WLAN at present; If this receiving system correctly receives a certain grouping; Then this receiving system can return an acknowledge message (ACK) to wireless network access point; So, represent that then this grouping is not correctly received by this receiving system, therefore if wireless network access point does not receive this acknowledge message in a scheduled time; Wireless network access point can retransmit this grouping till this grouping is by correct the reception or till after wireless network access point has retransmitted a pre-determined number, abandoning this grouping; Yet the point-to-point data transfer mode of this kind is not suitable for being used for broadcast data, and it is former because if wireless network access point need consider that whether each receiving system has the pairing acknowledge message of a certain grouping of passback to select to retransmit this groupings or transmits next one grouping; Then must after transfer operation each time, inquire through the network address of specifying each receiving system whether each receiving system correctly receives this grouping, and this will reduce the available bandwidth of wireless network itself significantly.Prior art discloses a kind of data broadcasting mechanism in addition, and when wireless network access point operates in broadcast mode following time, access point can directly be broadcasted away dividing into groups and do not considered that whether previous grouping is by correct reception; Though this kind data broadcasting mode possibly not have too big problem when the broadcasting general data; Yet; If when this kind data broadcasting mode is used for broadcast video/audio programs, some receives the situation (situation that the grouping that for example lacks possibly cause image frame to pause) that bad receiving system but produces audio-visual bad most probably.
In addition, the network bandwidth of wireless network can reach 20Mbps at least at present, if only broadcast a program to a plurality of receiving systems, owing to only expend the bandwidth about 6Mbps, so do not have too big problem; Yet; For transmitting a plurality of image and sound programs; When for example broadcasting has the grouping of one of three image and sound program data; Then can be because of being not that all receiving systems all can correctly receive this grouping (for example some receiving system possibly usually can't correctly receive this grouping and need wireless network access point often to retransmit this grouping) and cause the overall transfer limited bandwidth in the receiving system that usually can't correctly receive grouping, thereby cause other receiving systems can't successfully watch image and sound program.
Summary of the invention
Therefore one of the object of the invention is to provide a kind of radio transmitting device and correlation technique thereof of in WLAN, broadcasting a plurality of image and sound programs to a plurality of receiving systems immediately and can keep preferable audio-visual ornamental quality simultaneously, to solve above-mentioned said problem; Simultaneously; The present invention provides a kind of in addition and in WLAN, transmits/receive the method for broadcast data with the broadcast data that can right the wrong through coding/decoding computing and interleaving/de-interleaving computing; To solve packet error probability in the network environment (packet errorrate, PER) too high problem.
According to embodiments of the invention, it discloses a kind of radio transmitting device that is used for broadcasting the packets to a plurality of receiving systems.This radio transmitting device comprises a transfer circuit, a receiving circuit and an estimating circuit; Wherein this transfer circuit is used for broadcasting the packets to these receiving systems; This receiving circuit is used for receiving the signal that arbitrary this receiving system sends; And this estimating circuit couples this receiving circuit; Be used for the signal and the condition of acceptance that send according to these receiving systems; To judge whether these receiving systems are fit to receive the broadcast packe of this radio transmitting device; This estimating circuit comprises a signal quality estimating circuit, a control circuit and a storage element, and wherein this signal quality estimating circuit signal of being used for sending according to these receiving systems to be producing a plurality of estimated results, the receiving quality when corresponding each receiving system of each estimated result receives the broadcast packe of this radio transmitting device; And this control circuit couples this signal quality estimating circuit; Be used for according to each estimated result and this condition of acceptance, whether be fit to receive the broadcast packe of this radio transmitting device to determine each receiving system, this storage unit stores be fit to receive this radio transmitting device broadcast packe should/information of one of them at least of those receiving systems; And this radio transmitting device according to the stored information of this control circuit and be fit to receive this radio transmitting device broadcast packe should/one of them signals that sends at least of those receiving systems; Judge this information pairing should/in those receiving systems whether one of them need receive the grouping broadcasted again at least, if then broadcast the grouping that this has been broadcasted again.
According to embodiments of the invention, it discloses a kind of radio transmitting method that is used for broadcasting the packets to a plurality of receiving systems, and it comprises: broadcast a plurality of groupings to these receiving systems; Receive the signal that these receiving systems send; According to the signal that these receiving systems sent, to produce a plurality of estimated results, the receiving quality when corresponding each receiving system of each estimated result receives these groupings; According to each estimated result and a condition of acceptance, divide into groups to determine each receiving system whether to be fit to receive these, and store be fit to receive these groupings should/information of one of them at least of those receiving systems; And according to this information and be fit to receive these groupings should/one of them signals that sends at least of those receiving systems; Judge this information pairing should/in those receiving systems whether one of them need receive the grouping broadcasted again at least; If then broadcast the grouping that this has been broadcasted again.
Description of drawings
Fig. 1 a is the wireless broadcast system sketch map of one embodiment of the invention.
Fig. 1 b is the sketch map of the SNR estimating circuit of one embodiment of the invention.
Fig. 2 disposes the sketch map of embodiment of radio transmitting device and the receiving system of Error-Correcting Circuit for the present invention.
The main element symbol description
100 radio transmitting devices, 105 signal strength detectors
110 SNR mapping tables, 115 control circuits
200 receiving systems, 205 coding modules
210 transfer circuits, 215 receiving circuits
220 decoder modules
Embodiment
The invention discloses a kind of radio transmitting device and method, it can be used to carry out radio broadcasting.Fig. 1 a is a wireless broadcast system sketch map of the present invention; It has shown the transmission relation of radio transmitting device of the present invention 100 and a plurality of receiving system RX_A, RX_B, RX_C, RX_D, RX_E, RX_F; Can know by figure; The transmission range that these receiving systems RX_A, RX_B, RX_C, RX_D, RX_E, RX_F and radio transmitting device are 100 is not quite similar; Wherein the transmission range of receiving system RX_F and radio transmitting device 100 farthest; Therefore generally speaking, when radio transmitting device 100 broadcast packe, for example during video-audio signal such as broadcast TV program; The receiving quality of receiving system RX_F maybe be the poorest; And then possibly usually require radio transmitting device 100 to retransmit the grouping that does not receive, thereby can drag down the transmission usefulness that former instinct reaches between radio transmitting device 100 and other receiving system RX_A, RX_B, RX_C, RX_D, RX_E, so radio transmitting device of the present invention 100 can be got rid of the receiving system (for example ignoring the signal re-transmission requirement of the receiving system RX_F that does not meet this condition of acceptance) that does not meet this condition of acceptance according to a condition of acceptance; And can in meeting a plurality of receiving systems of condition of acceptance, determine one with reference to receiving system (for example being range wireless transmission device 100 second receiving system RX_E far away), with its as whether again the foundation of broadcast packe.Please note; Except that transmission range; The design of receiving system itself and other environmental factor etc. also possibly influence the receiving quality of receiving system; Radio transmitting device of the present invention decides how to carry out data broadcasting through the receiving quality of judging receiving system, need not directly go to weigh the various factors that possibly influence the receiving quality of receiving system.In addition; The embodiment of radio transmitting device 100 of the present invention is wireless local network connecting point (wireless local area network access point; WLAN AP), so this non-limitation of the present invention needs only according to open radio transmitting device or method to realize of the present invention; For example one have a radio broadcasting function computer, personal digital assistant, mobile phone, STB (set-top box) etc., the scope that all contains in the present invention.In addition, the present invention removes and can be applicable to the WLAN transmission technology, also can be applicable to Wireless USB (wireless USB) transmission technology, bluetooth (bluetooth) transmission technology etc.
Hold the above; And please continue 1a with reference to figure; Radio transmitting device 100 includes a transfer circuit (transmitter), a receiving circuit (receiver) and an estimating circuit (not being presented among Fig. 1 a); Wherein this transfer circuit and this receiving circuit be present technique field those of ordinary skill known circuit; Be used for broadcasting the packets to these receiving systems respectively and be used for receiving the signal that arbitrary these receiving systems send, and this estimating circuit configurable be a signal to noise ratio (signal-to-noise ratio, SNR) estimating circuit and/or a packet error probability (packet error rate; PER) estimating circuit; It is used for estimating the receiving quality of receiving system RX_A, RX_B, RX_C, RX_D, RX_E, RX_F, and then gets rid of the receiving system that does not meet this condition of acceptance according to the receiving quality and a condition of acceptance (for example a critical SNR value and/or a minimum PER value) of each receiving system of measuring, and can in meeting the receiving system of this condition of acceptance, determine one with reference to receiving system; Make radio transmitting device 100 when this retransmits a certain grouping with reference to the receiving system requirement, broadcasting should be divided into groups again.Note that radio transmitting device 100 of the present invention also can be when arbitrary receiving system that meets this condition of acceptance requires to retransmit a certain grouping, broadcasting should be divided into groups again.
Hold the above; When the wireless broadcast system initialization shown in Fig. 1 a; Radio transmitting device 100 can decide the required flow (throughput) of broadcasting according to the information number of required broadcasting; Determine the packet format (packet format) of wireless transmission or the data rate (datarate) of physical layer (physical layer) etc. thus; And determine aforesaid critical SNR value and/or minimum PER value so that whether it can be stablized the foundation that receives as broadcast message; Generally speaking; Heal when high when required flow, the receiving system that can satisfy this flow possibly more lack, that is more lacks receiving system and can stablize receiving broadcasting information; Therefore; Radio transmitting device 100 of the present invention can decide the required flow of broadcasting through a preset mechanism (for example detecting the information number that can broadcast at present), perhaps select for the user with the corresponding receiving system number that receives this broadcast message of stablizing to show the broadcast message number of being supported through a user interface (the for example user interfaces that possessed of this radio transmitting device 100 itself or the personal computer that connects outer network with having of coupling of this radio transmitting device 100 etc.), that is the user can be more via this user interface selection/less broadcast message number is less to let/more receiving system can stablize this broadcast message of reception.In an embodiment of the present invention; Corresponding relation between parameters such as above-mentioned broadcast message number, flow, packet format, data rate, critical SNR value, minimum PER value can be stored in a mapping table (mapping table), and radio transmitting device 100 decides other parameter according to the information number of required broadcasting to utilize this mapping table.Execution mode as for mapping table itself is that present technique field those of ordinary skill institute is known, does not repeat them here.
The embodiment of aforementioned SNR estimating circuit is shown in Fig. 1 b, and it comprises a signal strength detector 105, a SNR mapping table 110 (SNR mapping table) and a control circuit 115.When a certain receiving system is desired with radio transmitting device 100 lines; Can send a signal to radio transmitting device 100; This moment, the SNR estimating circuit of radio transmitting device 100 promptly carried out the SNR estimation according to this signal, and SNR estimating circuit function mode is following: signal strength detector 105 is estimated the intensity of these signals; SNR mapping table 110 according to the intensity of this signal to produce a corresponding SNR value; Control circuit 115 is got rid of the receiving system that does not meet this condition of acceptance according to this a SNR value and a SNR critical value, and in the receiving system that meets this SNR critical value, selects at least one with reference to receiving system.In the present embodiment, control circuit 115 will meet all receiving systems of this SNR critical value and should be recorded in the tabulation with reference to receiving system, and this tabulation is stored by a storage element, and radio transmitting device 100 can decide broadcast mechanism according to this tabulation.Please note; SNR estimating circuit shown in Fig. 1 b is not to be used for limiting enforcement of the present invention; Those of ordinary skills' various known methods capable of using are carried out SNR and are estimated; For example utilize radio transmitting device 100 intrinsic baseband circuits to handle the signal that receiving system sends, estimating the pairing SNR value of this signal, the receiving system that control circuit 115 is fit to receiving broadcasting information according to this SNR value and the decision of SNR critical value more why.
Aforementioned PER estimating circuit is used for estimating the pairing packet error probability of each receiving system; The embodiment of PER estimating circuit comprises: a control circuit; Be used for notifying this test packet (training packet) that radio transmitting device 100 sends some and fixed modulation form to give specific receiving system; The form of this test packet can be bi-phase shift keying (binary phase-shift keying; BPSK), QPSK (quadrature phase-shift keying; QPSK), 16 quadrature amplitude modulation (16 quadratureamplitude modulation, 16QAM), form such as 64 quadrature amplitude modulation, 128 quadrature amplitude modulation or 256 quadrature amplitude modulation, these forms be present technique field those of ordinary skill the known and corresponding different flow of different-format (throughput); When this specific receiving system correctly receives the test packet of a certain form, just can send a notification signal (ACK) to notify this radio transmitting device 100; One counter is used for counting the ACK number that is produced when this specific receiving system receives the test packet of a certain form, the ACK number of generation the more, the packet error probability of representing this specific receiving system when receiving the test packet of this a certain form, to be produced is lower; And this control circuit is learnt each packet error probability that corresponding each packet format of this specific receiving system is produced according to the count value of counter; And then judge the maximum stream flow that this specific receiving system can satisfy; In the present embodiment; This control circuit can be after this radio transmitting device 100 be accomplished the test packet of sending a certain form; This counter is reseted; And the test packet of notice radio transmitting device 100 another forms of transmission, counter just can be counted the ACK number that this specific receiving system is produced respectively when receiving the test packet of different-format thus, and control circuit also can be judged the maximum stream flow that this specific receiving system can satisfy according to these ACK values.Moreover after the test of completion to this specific receiving system, the PER estimating circuit can carry out PER to another specific receiving system and estimate; The rest may be inferred; After the PER estimating circuit is accomplished the test to all receiving systems, can get rid of the receiving system that is not inconsistent the critical PER value of unification according to test result, and with packet error probability less than and the receiving system of approaching this critical PER value be made as with reference to receiving system; In the present embodiment; The PER estimating circuit will meet all receiving systems of this critical PER value and should be recorded in the tabulation with reference to receiving system, and this tabulation is stored by a storage element, and radio transmitting device 100 can decide broadcast mechanism according to this tabulation.
The control circuit of aforementioned SNR/PER estimating circuit implements to be included in the medium access control of radio transmitting device 100, and (media access control MAC) in the circuit, below will further specify the operation of this control circuit.
Please refer to Fig. 1 a, Fig. 1 b and aforementioned related description, according to embodiments of the invention, the performed step of the control circuit of SNR/PER estimating circuit comprises:
Step 1: the receiving ability of judging receiving system RX_F according to the SNR/PER estimated result is not good, so only receiving system RX_A, RX_B, RX_C, RX_D, RX_E are listed in the tabulation that can stablize receiving broadcasting information;
Step 2: judge in the receiving system that to stablize receiving broadcasting information according to the SNR/PER estimated result; The receiving ability of receiving system RX_E a little less than; So setting RX_E is with reference to receiving system; When the packet error of receiving with reference to receiving system RX_E (packet error) or when not receiving grouping (packetloss); Just can not send ACK to radio transmitting device 100, when this control circuit is found not receive the ACK of the corresponding a certain grouping of being sent from receiving system RX_E according to one pre-conditioned (a for example Preset Time), just can broadcast this a certain grouping again; And when radio transmitting device 100 is received the ACK that is sent with reference to receiving system RX_E; Control circuit just can be inferred receiving system RX_A, RX_B, RX_C, RX_D, RX_E packet error or packet drop all not taken place; Just need not to broadcast again this grouping this moment; Also even the more weak receiving system RX_E of receiving ability can correctly receive this grouping, but other stronger receiving systems of inference receiving ability also can correctly receive this grouping, and this inference meets actual application;
Step 3: the continuous transmission number of times TX_count that sets each grouping; It is adjustable should transmitting number of times TX_count continuously; When its value is bigger, represent radio transmitting device 100 continuously these groupings of transmission number of times the more, so can reduce the packet error probability of all receiving systems; In the present embodiment; Can determine whether and how adjust this according to the packet error probability with reference to receiving system RX_E and transmit number of times TX_count continuously, for example this control circuit finds that the ACK number (with respect to the ACK number that should send) that is sent with reference to receiving system RX_E is fewer in the unit interval, and control circuit just should transmit number of times TX_count continuously and transfer greatlyyer;
Step 4: even owing to the situation that packet error or packet drop do not take place with reference to receiving system RX_E; Packet error or packet drop also possibly take place in other arbitrary receiving system RX_A, RX_B, RX_C or RX_D; Therefore control circuit can be inquired the grouping of receiving system RX_A, RX_B, RX_C, the required heavy receipts of RX_D according to a predetermined condition T_D, and wherein this predetermined condition T_D can be a predetermined period or a predetermined packet of packets quantity;
Step 5: come again execution in step 1 and step 2 and/or step 3 according to a predetermined condition T_M; Upgrade thus the tabulation can stablize receiving broadcasting information with reference to receiving system and/or upgrade the setting that transmits number of times TX_count continuously, wherein this predetermined condition T_M can be a predetermined period or a predetermined packet of packets quantity; And
Step 6: time beyond radio transmitting device 100 broadcast messages or when enough transmittabilities are still arranged, allow radio transmitting device 100 and suitable receiving system to carry out the data communication of conventional wlan (wireless local area network).
In the above-mentioned steps 3, as far as each grouping, each transmits number of times TX_count continuously and can be equal values, or is a fixed value.In addition, above-mentioned steps 3,4,5,6 all can be according to user's setting or preset condition and is optionally opened or close.And if radio transmitting device 100 and receiving system can be operated in a plurality of passages of a plurality of transmission bands (for example two kinds of transmission bands of 2.4G/5G) or identical frequency band simultaneously; Then radio transmitting device 100 can use wherein that one frequency band/passage comes broadcast packe; And the grouping of using another frequency band/passage to retransmit need to retransmit, make the execution sane (robust) more of above-mentioned steps thus.
According to another embodiment of the present invention, the control circuit of SNR/PER estimating circuit is carried out the following step according to a predetermined time-histories:
Step 1: the receiving ability of judging receiving system RX_F according to the SNR/PER estimated result is not good, so only receiving system RX_A, RX_B, RX_C, RX_D, RX_E are listed in the tabulation that can stablize receiving broadcasting information;
Step 2: according to the re-transmission priority of SNR/PER estimated result decision receiving system RX_A, RX_B, RX_C, RX_D, RX_E and/or distribute the re-transmission up duration of receiving system RX_A, RX_B, RX_C, RX_D, RX_E; For example learn that according to the SNR/PER estimated result receiving ability of receiving system is RX_A＞RX_B＞RX_C＞RX_D＞RX_E; Then will retransmit priority and be made as RX_E＞RX_D＞RX_C＞RX_B＞RX_A, and will retransmit up duration and be made as RX_E >=RX_D >=RX_C >=RX_B >=RX_A.From the above mentioned; Radio transmitting device 100 can preferentially be responded the re-transmission requirement of the most weak receiving system RX_E of the receiving ability receiving system of packet error or packet drop (that is find the most easily); If arbitrary receiving system RX_A, RX_B, RX_C or RX_D also have the re-transmission requirement for same grouping; Then require and again after this same grouping of broadcasting, radio transmitting device 100 possibly need not to respond the re-transmission requirement of other receiving system for this same grouping in the re-transmission that radio transmitting device 100 is responded receiving system RX_E.In addition, be set as RX_E >=RX_D >=RX_C >=RX_B >=RX_A owing to retransmit up duration, so radio transmitting device 100 can use the more time to respond the re-transmission requirement of the most weak receiving system RX_E of receiving ability.In addition, but control circuit elasticity is adjusted above-mentioned re-transmission up duration, also can come each receiving system of poll (polling) whether to still have unsatisfied re-transmission requirement according to retransmitting priority;
Step 3: control radio transmitting device 100 during one sets in continuous broadcast packe;
Step 4: re-transmission priority and re-transmission up duration according to step 2 determined retransmit the grouping that needs re-transmission;
Step 5: in during one sets, allow radio transmitting device 100 and suitable receiving system to carry out the data communication of conventional wlan (wireless local area network);
Step 6: execution in step 1 is to step 6.Step 6 can be according to different designs demand or user's request and is adjusted, and for example step 6 can be adjusted to step 1 of every execution, just carries out step 2 to step 5 twice, and then execution in step 6.
A corresponding fixed time period of above-mentioned each step or an adjustable time cycle.In addition, can adjust during the setting of step 3 and step 5, step 5 item can optionally be opened or close according to user's setting or preset condition.Again if radio transmitting device 100 and receiving system can be operated in a plurality of passages of a plurality of transmission bands (for example two kinds of transmission bands of 2.4G/5G) or identical frequency band simultaneously; Then radio transmitting device 100 can use wherein that one frequency band/passage comes broadcast packe; And the grouping of using another frequency band/passage to retransmit need to retransmit, make the execution sane (robust) more of above-mentioned steps thus.
In addition, for reducing the generation of packet error or packet loss, the radio transmitting device 100 shown in Fig. 1 a and each receiving system also can dispose an Error-Correcting Circuit respectively.See also Fig. 2; It disposes the radio transmitting device 100 and the embodiment sketch map that disposes the receiving system 200 of Error-Correcting Circuit of Error-Correcting Circuit, can know that by figure the coding module 205 of radio transmitting device 100 is encoded received primary data; Transfer circuit 210 produces according to the primary data after encoding and divides into groups; And with transmitted in packets to receiving system 200, the receiving circuit 215 of receiving system 200 produces coded data according to dividing into groups, and decoder module 220 is decoded this coded data again to produce this primary data; Because primary data has been passed through coding before carrying out wireless transmission; So even the wireless transmission process causes this coded data that the part mistake is arranged, decoder module 220 also can be proofreaied and correct the mistake of this coded data with the corresponding decoding algorithm of coded data according to one, and then produces this primary data.
Hold the above; In the present embodiment; Coding module 205 comprises an encoder (encoder) and an interleaver (interleaver); Encoder can come this primary data is encoded according to any known coded mode; For example encode, and interleaver can be piece type (block type) interleaver, Conlution Integral (convolution type) interleaver or other stochastic pattern (random type) interleaver etc. according to Rui Desuoluomen type error correcting code (Reed-Solomon (RS) type error correctioncode, it comprises the RS code of RS code, RS product code or other related variation); It can with encoder continuously the data of output disperse and reconfigure, to produce the primary data behind the aforementioned coding.Decoder module 220 then comprises and coding module 205 corresponding deinterleavers (deinterleaver) and decoder (decoder); The data that deinterleaver is used for that receiving circuit 215 is exported are replied and are aforementioned coded data; Decoder then is used for this coded data is decoded, to produce this primary data.Because the present technique field that is embodied as the individually those of ordinary skill institute of aforementioned transfer circuit 210, receiving circuit 215, encoder, interleaver, deinterleaver and decoder is known, so do not repeat them here.
According to the above; The present invention has under the prerequisite of limited transmission bandwidth at radio transmitting device; A kind of efficient broadcast mechanism is provided, and decapacitation improves the bandwidth constraints that point-to-point transmission mechanism produced in the WLAN, can also take into account the receiving quality of receiving system.
The above is merely the preferred embodiments of the present invention, and all equalizations of being done according to claim limited range of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (40)
1. a radio transmitting device is used for broadcasting the packets to a plurality of receiving systems, and this radio transmitting device comprises:
One transfer circuit is used for broadcasting the packets to these receiving systems;
One receiving circuit is used for receiving the signal that arbitrary this receiving system sends; And
One estimating circuit; Couple this receiving circuit; Be used for the signal and the condition of acceptance that send according to these receiving systems; Determining that whether these receiving systems are fit to receive the grouping that this radio transmitting device is broadcasted, and each receiving system decision that will be fit to receive the grouping that this radio transmitting device broadcasts is a target receiving system, and this estimating circuit comprises:
One signal quality estimating circuit is used for the signal that sends according to these receiving systems, producing a plurality of estimated results, and the receiving quality when corresponding each receiving system of each estimated result receives the grouping that this radio transmitting device broadcasts;
One control circuit couples this signal quality estimating circuit, is used for according to each estimated result and this condition of acceptance, and whether be this target receiving system to determine each receiving system; And
One storage element couples this control circuit, is used for storing this/information of one of them at least of those destination apparatus;
Wherein this radio transmitting device according to this information and should/one of them signals that sends at least of those destination apparatus; Judge this/in those destination apparatus whether one of them need receive the grouping broadcasted again at least; If then broadcast the grouping that this has been broadcasted again.
2. radio transmitting device as claimed in claim 1, it decides a flow according to a preset mechanism, or comes according to a user's setting determining this flow through a user interface, and according to this this condition of acceptance of flow decision.
3. radio transmitting device as claimed in claim 2, wherein this condition of acceptance is a preset signal to noise ratio and/or a packet error probability, this signal quality estimating circuit is a SNR estimation circuit and/or a packet error probability estimating circuit.
4. radio transmitting device as claimed in claim 3, wherein this SNR estimation circuit comprises:
One signal strength detector couples this receiving circuit, is used for detecting the intensity of the signal that these receiving systems send, to produce a plurality of testing results, the intensity of the signal that corresponding each receiving system of each testing result is sent; And
One mapping table couples this signal strength detector and this control circuit, is used for producing these estimated results according to these testing results.
5. radio transmitting device as claimed in claim 3; It sends grouping to arbitrary this receiving system of a plurality of specific formats; This receiving system is accomplished the grouping that receives each specific format and is just transmitted a notification signal to this radio transmitting device, and this packet error probability estimating circuit comprises:
One counter couples this receiving circuit and this control circuit, be used for according to should/those notification signals produce one of them of these estimated results.
6. radio transmitting device as claimed in claim 5, wherein this specific format is bi-phase shift keying BPSK, QPSK QPSK, 16 quadrature amplitude modulation QAM, 64 quadrature amplitude modulation, 128 quadrature amplitude modulation or 256 quadrature amplitude modulation.
7. radio transmitting device as claimed in claim 1, wherein this control circuit judges whether these estimated results satisfy this condition of acceptance, to determine whether each receiving system is this target receiving system, and store this/information of those target receiving systems.
8. radio transmitting device as claimed in claim 7; Its according to this information and should/signal that those target receiving systems are sent; Judge whether arbitrary this destination apparatus need receive the grouping that this has been broadcasted again, if then broadcast the grouping that this has been broadcasted again.
9. radio transmitting device as claimed in claim 7; Wherein this control circuit is according to the difference of each estimated result and this condition of acceptance, cause should/select one with reference to receiving system in those destination apparatus, and store this information with reference to receiving system; This radio transmitting device is according to this information and be somebody's turn to do the signal with reference to receiving system sent; Judge whether this need receive the grouping that this has been broadcasted again with reference to receiving system, if then broadcast the grouping that this has been broadcasted again.
10. radio transmitting device as claimed in claim 9; Wherein this control circuit is when arriving a Preset Time; Judge whether this need receive the grouping that this has been broadcasted again with reference to receiving system; And when arriving a predetermined period or satisfying a predetermined packet of packets quantity, judge this with reference to receiving system and/or other should/whether those target receiving systems need receive the grouping that this has been broadcasted again.
11. radio transmitting device as claimed in claim 10 wherein arrives the required time of this Preset Time less than arriving said predetermined period or satisfying the required time of this predetermined packet of packets quantity.
12. radio transmitting device as claimed in claim 9, wherein this control circuit according to this with reference to the packet error probability of receiving system to determine the continuous transmission number of times of each grouping that this radio transmitting device is broadcasted.
13. radio transmitting device as claimed in claim 7; Wherein this control circuit is according to the difference of each estimated result and this condition of acceptance; Determine one of each target receiving system to retransmit priority and/or and retransmit up duration, this radio transmitting device according to should/those retransmit priority and/or should/those retransmit up durations and come to broadcast again the grouping that this has been broadcasted.
14. radio transmitting device as claimed in claim 1; Wherein this control circuit is according to the difference of each estimated result and this condition of acceptance, cause should/select one with reference to receiving system in those target receiving systems, and store this information with reference to receiving system; This radio transmitting device is according to this information and be somebody's turn to do the signal with reference to receiving system sent; Judge whether this need receive the grouping that this has been broadcasted again with reference to receiving system, if then broadcast the grouping that this has been broadcasted again.
15. radio transmitting device as claimed in claim 14, wherein this control circuit according to this with reference to the receiving system packet error probability to determine the continuous transmission number of times of each grouping that this radio transmitting device is broadcasted.
16. radio transmitting device as claimed in claim 1, it further comprises:
One encoder, the primary data that is used for encoding is to produce a coded data; And
One interleaver couples this encoder and this delivery module, this coded data that is used for interweaving, and to produce a coding back primary data, this transfer circuit comes broadcast packe according to this coding back primary data.
17. radio transmitting device as claimed in claim 1; It utilizes one first frequency band with broadcast packe; And utilize one second frequency band to broadcast the grouping that this has been broadcasted again; And at least one this target receiving system utilizes this first frequency band receiving the grouping of this first frequency band, and utilizes this second frequency band to receive the grouping that this has been broadcasted.
18. radio transmitting device as claimed in claim 1; It utilizes one first channel with broadcast packe; And utilize one second channel to broadcast the grouping that this has been broadcasted again; And at least one this target receiving system utilizes this first channel receiving the grouping of this first channel, and utilizes this second channel to receive the grouping that this has been broadcasted.
19. radio transmitting device as claimed in claim 1, wherein this control circuit allow this radio transmitting device during one sets in and arbitrary this receiving system carry out data communication.
20. radio transmitting device as claimed in claim 1, it is a wireless local network connecting point, a personal computer, a personal digital assistant, a mobile phone or a STB.
21. a radio transmitting method is used for broadcasting the packets to a plurality of receiving systems, this method comprises:
Broadcast a plurality of groupings to these receiving systems;
Receive the signal that these receiving systems send;
According to signal that these receiving systems sent producing a plurality of estimated results, the receiving quality when corresponding each receiving system of each estimated result receives these and divides into groups;
According to each estimated result and a condition of acceptance, divide into groups to determine each receiving system whether to be fit to receive these, and each receiving system decision that will be fit to receive these groupings is a target receiving system;
Store this/those target receiving systems in the information of one of them at least; And
According to this information and should/those target receiving systems in one of them signal that sends at least; Judge this/in those target receiving systems whether one of them need receive the grouping broadcasted again at least; If then broadcast the grouping that this has been broadcasted again.
22. method as claimed in claim 21, it further comprises:
Decide a flow and/or come according to a user's setting determining this flow according to a preset mechanism through a user interface, and according to this this condition of acceptance of flow decision.
23. method as claimed in claim 22, wherein this condition of acceptance is a preset signal to noise ratio and/or a packet error probability.
24. method as claimed in claim 23, the step that wherein produces these estimated results comprises a SNR estimation step, and it comprises:
Detect the intensity of the signal that these receiving systems send, to produce a plurality of testing results, the intensity of the signal that corresponding each receiving system of each testing result is sent; And
Produce these estimated results according to these testing results.
25. method as claimed in claim 23, the step that wherein produces these estimated results comprises a packet error probability estimating step, and it comprises:
Send grouping to arbitrary this receiving system of a plurality of specific formats, this receiving system completes successfully the grouping that receives each specific format and just sends a notification signal;
Receive and be somebody's turn to do/those notification signals; And
Count this/those notification signals produce one of them of these estimated results.
26. method as claimed in claim 25, wherein this specific format is bi-phase shift keying BPSK, QPSK QPSK, 16 quadrature amplitude modulation QAM, 64 quadrature amplitude modulation, 128 quadrature amplitude modulation or 256 quadrature amplitude modulation.
27. method as claimed in claim 21 determines that wherein whether each receiving system is that the step of this target receiving system comprises:
Whether judge whether these estimated results satisfy this condition of acceptance, be this target receiving system to determine each receiving system; And
Store this/information of those target receiving systems.
28. method as claimed in claim 27, wherein judge this/one of them step that whether need receive this grouping of having broadcasted again at least in those target receiving systems comprises:
According to this information and should/signal that those target receiving systems are sent, judge whether arbitrary this target receiving system need receive the grouping that this has been broadcasted again, if then broadcast the grouping that this has been broadcasted again.
29. method as claimed in claim 27, wherein judge this/one of them step that whether need receive this grouping of having broadcasted again at least in those target receiving systems comprises:
According to the difference of each estimated result and this condition of acceptance, cause should/select one with reference to receiving system in those target receiving systems, and store this information with reference to receiving system; And
According to this information and should judge whether this need receive the grouping that this has been broadcasted again with reference to receiving system, if then broadcast the grouping that this has been broadcasted again with reference to the signal that receiving system sent.
30. method as claimed in claim 29, wherein judge this/one of them step that whether need receive this grouping of having broadcasted again at least in those target receiving systems comprises:
When arriving a Preset Time, judge whether this need receive the grouping that this has been broadcasted again with reference to receiving system; And
When arriving a predetermined period or satisfying a predetermined packet of packets quantity, judge this with reference to receiving system with and/or other be fit to receive this radio transmitting device broadcast packe should/whether needs receive the grouping that this has been broadcasted to those receiving systems again.
31. method as claimed in claim 30 wherein arrives the pairing time of this Preset Time less than arriving this predetermined period or satisfying the pairing time of this predetermined packet of packets quantity.
32. method as claimed in claim 29, it further comprises:
According to this with reference to the packet error probability of receiving system to determine the continuous transmission number of times of these each groupings in dividing into groups.
33. method as claimed in claim 27, wherein judge this/one of them step that whether need receive this grouping of having broadcasted again at least in those target receiving systems comprises:
According to the difference of each estimated result and this condition of acceptance, determine one of each target receiving system to retransmit priority and/or and retransmit up duration; And
According to should/those retransmit priority and/or should/those retransmit up durations and come to broadcast again the grouping that this has been broadcasted.
34. method as claimed in claim 21, wherein judge this/one of them step that whether need receive the grouping broadcasted again at least in those target receiving systems comprises:
According to the difference of each estimated result and this condition of acceptance, cause should/select one with reference to receiving system in those target receiving systems, and store this information with reference to receiving system; And
According to this information and should judge whether this need receive the grouping that this has been broadcasted again with reference to receiving system, if then broadcast the grouping that this has been broadcasted again with reference to the signal that receiving system sent.
35. method as claimed in claim 34, it further comprises:
According to this with reference to the packet error probability of receiving system to determine the continuous transmission number of times of these each groupings in dividing into groups.
36. method as claimed in claim 21 is wherein broadcasted these and is divided into groups to comprise to the step of these receiving systems:
The primary data of encoding is to produce a coded data;
This coded data that interweaves is to produce a coding back primary data;
Produce these groupings according to this coding back primary data; And
Broadcast these groupings.
37. method as claimed in claim 21 is wherein broadcasted these and is divided into groups to comprise to the step of these receiving systems:
Utilize one first frequency band to divide into groups, and utilize one second frequency band to broadcast the grouping that this has been broadcasted again to broadcast these;
Wherein at least one this target receiving system utilizes this first frequency band to receive these groupings, and utilizes this second frequency band to receive the grouping that this has been broadcasted.
38. method as claimed in claim 21 is wherein broadcasted these and is divided into groups to comprise to the step of these receiving systems:
Utilize one first channel to divide into groups, and utilize one second channel to broadcast the grouping that this has been broadcasted again to broadcast these;
Wherein at least one this target receiving system utilizes this first channel to receive these groupings, and utilizes this second channel to receive the grouping that this has been broadcasted.
39. method as claimed in claim 21, it further comprises:
During one sets with this/those receiving systems carry out data communication.
40. method as claimed in claim 21, it is applied to a wireless local network connecting point, a personal computer, a personal digital assistant, a mobile phone or a STB.
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| CN200710084930XA CN101247326B (en) | 2007-02-16 | 2007-02-16 | Wireless transmission device and correlated method |
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| CN200710084930XA CN101247326B (en) | 2007-02-16 | 2007-02-16 | Wireless transmission device and correlated method |
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| CN102118782B (en) * | 2010-01-05 | 2014-10-08 | 中国移动通信集团公司 | Uplink transmission method, system and equipment |
| CN103124432A (en) * | 2013-01-23 | 2013-05-29 | 中兴通讯股份有限公司 | Wireless message transmitting device and method |
| CN105208577B (en) * | 2015-08-21 | 2019-01-04 | 北京岩与科技有限公司 | A kind of signal quality evaluating method based on low rate wireless network |
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