CN202488728U - Receiving terminal device in wireless digital communication - Google Patents
Receiving terminal device in wireless digital communication Download PDFInfo
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- CN202488728U CN202488728U CN2011203700854U CN201120370085U CN202488728U CN 202488728 U CN202488728 U CN 202488728U CN 2011203700854 U CN2011203700854 U CN 2011203700854U CN 201120370085 U CN201120370085 U CN 201120370085U CN 202488728 U CN202488728 U CN 202488728U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The utility model discloses a receiving terminal device in wireless digital communication, and relates to the technical field of wireless communication. The receiving terminal device can improve the flexibility of communication in a wireless audio transmission system, improve the resource utilization rate of the system, and effectively reduce the power consumption of the system. The receiving terminal device in wireless digital communication provided by the embodiment of the utility model comprises an adjustment information receiving unit and a frame structure adjusting unit. The adjustment information receiving unit is used for receiving frame structure adjustment information from a sending terminal, wherein the frame structure adjustment information comprises radio frequency packet adjustment information, the frame structure adjustment information is generated by the sending terminal based on communication state indication information when the sending terminal acquires that a communication state changes, and the communication state indication information indicates a receiving terminal state and/or a channel state. The frame structure adjusting unit is used for adjusting a used frame structure by using the frame structure adjustment information and communicates with the sending terminal based on the adjusted frame structure. The scheme is suitable for a plurality of wireless communication systems with a high requirement for transmission quality.
Description
Technical field
The utility model relates to wireless communication technology field, especially relates to the receiving device in a kind of radio digital communication.
Background technology
Along with the progress of wireless transmission technology, particularly based on the 2.4GHz frequency range, integrate the appearance of the SOC(system on a chip) of characteristics such as low-power consumption, low radiation, low cost, making wireless transmission technology be used for the wireless digital audio product in a large number becomes possibility.
The wireless digital audio transmission techniques mainly comprises three types of Radio Transmission Technologys based on Wireless Fidelity (WiFi), bluetooth and 2.4G at present.Wherein, have the advantage of high bandwidth based on the ANTENNAUDIO transmission technology of WiFi, but, cause problems such as highly energy-consuming and high radiation because the WiFi transmitting power is bigger; ANTENNAUDIO transmission technology based on bluetooth is relatively ripe, but on the synchronous transmission of audio frequency, has higher time-delay; Radio Transmission Technology based on 2.4G has advantages such as low-power consumption, low radiation and low cost.
Because the Related product of wireless digital audio system generally uses powered battery; So system is relatively stricter to the requirement of power consumption; And the characteristics that the nearly body of wireless digital earphone system uses have also proposed the requirement of low radiation to system; Moreover, the wireless digital earphone system also requires wireless system to have low delay and high reliability as a kind of system of voice data synchronous transmission.To sum up, in low-power consumption, low delay, the wireless digital earphone system of following present stage of requirement of low radiation adopts the 2.4G transmission technology mostly.
Yet, at present also not overripened based on the ANTENNAUDIO transmission technology of 2.4G.In the audio system of present stage based on the Radio Transmission Technology of 2.4G; The main frame structure that adopts the fixed RF bag; For the pre-specified employed frame structure of the earphone end in the system also is that this earphone end is reserved corresponding bandwidth resource; When carrying out radio communication, according to predetermined frame structure transmitting audio data on bandwidth reserved.
Existing this processing mode has caused the waste of system bandwidth resource, has increased system power dissipation, for example; Existing wireless audio communication mode only is directed against the communication system of fixed scene; Set in advance frame structure also is only applicable to transmitting terminal and the earphone end in this fixed scene, the communication mode underaction, and when communication scenes changes; The frame structure that is provided with in advance can't be applicable to new scene probably again, causes carrying out the transmission of voice data; And for packet a plurality of retransmission packets are set in the existing frame structure; And when the packet normal transmission, need not to carry out the re-transmission of data, existing this processing mode; Under any circumstance; All comprise a plurality of retransmission packets in each frame that is transmitted, both wasted the bandwidth of system, increased the power consumption of transmitting terminal and earphone end again.
The utility model content
The utility model embodiment provides the receiving device in a kind of radio digital communication, can improve the flexibility of communicating by letter in the wireless audio transmission system, improves usage factor of system resource, effectively reduces the power consumption of system.
For achieving the above object, the technical scheme of the utility model embodiment is achieved in that
The utility model embodiment provides the receiving device in a kind of radio digital communication, and this equipment comprises:
The adjustment information receiving element; Be used to receive frame structure adjustment information from transmitting terminal; Said frame structure adjustment information comprises radio frequency bag adjustment information; Said frame structure adjustment information is that transmitting terminal generates according to the communications status indication information when knowing that communications status changes, said communications status indication information indication receiving-end state and/or channel status;
The frame structure adjustment unit is used to utilize said frame structure adjustment information to adjust employed frame structure, and carries out data communication according to adjusted frame structure and said transmitting terminal.
Further, when transmitting terminal generates said frame structure adjustment information according to the receiving-end state of the receiving terminal that connected,
When last at least one first receiving terminal of communications status indication information indication connects; And current communications status indication information indicates said first receiving terminal to break off connection; When the radio frequency bag adjustment information indication that is generated is deleted corresponding to the response packet of said first receiving terminal in frame structure; Said frame structure adjustment unit; Specifically be used for utilizing the radio frequency bag adjustment information that is received to set up the retransmission packet that is not more than the shared radio frequency bandwidth of all first receiving terminal response packets, and/or the sequential position of response packet is sent in adjustment in frame structure at frame structure; Perhaps,
Indicates at least one second receiving terminal when a last communications status indication information and do not connect, and current communications status indication information indicates said second receiving terminal successfully to connect,
When the radio frequency bag adjustment information indication that is generated is added corresponding to the response packet of said second receiving terminal in frame structure; Said frame structure adjustment unit; Specifically be used for utilizing the radio frequency bag adjustment information that is received to be not less than the retransmission packet of the shared radio frequency bandwidth of all second receiving terminal response packets in the frame structure deletion; And/or, the sequential position of sending response packet in the adjustment frame structure.
Further, when the receiving-end state that whether successfully receives the corresponding data bag according to receiving terminal at transmitting terminal generates said frame structure adjustment information,
All packets all successfully receive in the retransmission packet sphere of action of said communications status indication information indication respective frame; Said frame structure adjustment unit; Specifically be used in each frame period, utilize in the adjusted frame structure of radio frequency bag adjustment information that is received not comprise retransmission packet; Perhaps,
There is the data-bag lost situation in the retransmission packet sphere of action of said communications status indication information indication respective frame; Said frame structure adjustment unit; Specifically be used in each frame period; Utilize the radio frequency bag adjustment information that is received to know the retransmission packet sequence that is adopted, and in frame structure, adjust the position of the pairing packet of retransmission packet according to this retransmission packet sequence.
Further; When transmitting terminal generates said frame structure adjustment information according to the channel status of the current channel quality of the communication system that gets access to; Said frame structure adjustment information also comprises the relative position adjustment information, and the cycle that the indication of said relative position adjustment information is used to carry out the frame structure saltus step is with respect to the sequential position in the cycle that is used to send respective frame structural adjustment information:
Said frame structure adjustment unit; Specifically be used for according to adjusting employed frame structure with the corresponding to frame structure adjustment information of transmitting terminal; And when the cycle with the saltus step of the corresponding to execution frame structure of transmitting terminal arrives; According to adjusted frame structure, receive radio frequency bag from transmitting terminal, send response packet to transmitting terminal.
Further, said frame structure adjustment unit also specifically was used in each frame period; According to adjusting employed frame structure with the corresponding to frame structure adjustment information of transmitting terminal; And, receive radio frequency bag from transmitting terminal according to adjusted frame structure, send response packet to transmitting terminal.
Further, said receiving device also comprises:
First receives control unit, is used for when the present frame from transmitting terminal comprises retransmission packet, if according to the statistics to the radio frequency bag that received, affirmation does not have data-bag lost in the present frame retransmission range, then reject the retransmission packet from transmitting terminal; Perhaps,
Second receives control unit, is used for behind at least one retransmission packet that receives present frame, and when confirming in the present frame retransmission range, not have data-bag lost, refusal continues to receive the retransmission packet from transmitting terminal; Perhaps,
The 3rd receives control unit, is used for when not comprising required retransmission packet in the retransmission packet of confirming not receive in the present frame, rejecting the retransmission packet from transmitting terminal when according to the retransmission packet sequence of being known that transmitting terminal adopted.
Further, said frame structure adjustment unit also specifically is used for the every frame radio frequency bag from transmitting terminal to receiving, and repeatedly retransmits response packet to transmitting terminal; Wherein, when having a plurality of receiving terminal, repeatedly retransmit the response packet of each receiving terminal according to set sequential position to transmitting terminal, two adjacent in set sequential position response packets belong to the different received end.
Further, said adjustment information receiving element specifically is used for the frame structure adjustment information that receiving end/sending end issues through packet, and said frame structure adjustment information is carried in the said packet; Perhaps, the frame structure adjustment information that receiving end/sending end issues through controlling packet, said controlling packet generates according to the frame structure adjustment information.
By above-mentioned visible; The technical scheme of the utility model embodiment provides a kind of novel wireless digital voice communication scheme; This scheme is made corresponding adjustment strategy according to the practical communication state of the system that gets access to, and the frame structure adjustment information of passing through to be generated makes receiving terminal and transmitting terminal know the adjustment strategy; Thereby realized a kind of communication that dynamically changes employed frame structure according to communications status; Significantly improved the flexibility of wireless audio transmission system, guaranteed that multiple communication scenes subaudio frequency successful communication realizes, has improved user experience.
Further; This programme can be provided with the particular content of the radio frequency bag of required transmission flexibly, thereby control the required system resource that takies through the dynamic adjustment to frame structure; Can be under the requirement of satisfying high reliability, low delay and low radiation; Reduce system power dissipation to greatest extent, improve usage factor of system resource, have stronger feasibility and wider application prospect.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Receiving device structural representation in a kind of radio digital communication that Fig. 1 provides for the utility model embodiment one;
The basic framework sketch map of a kind of wireless digital earphone system that Fig. 2 provides for the utility model embodiment two;
The communication means schematic flow sheet of a kind of wireless digital earphone that Fig. 3 provides for the utility model embodiment two;
Employed frame structure sketch map in the communication of a kind of wireless digital earphone that Fig. 4 provides for the utility model embodiment two;
Fig. 5 provide for the utility model embodiment two with respect to new earphone end of scene of Fig. 5 and the transmitting terminal frame structure sketch map that the back adjustment obtains that connects;
Earphone end of scene with respect to Fig. 6 that Fig. 6 provides for the utility model embodiment two is connected with transmitting terminal loses the frame structure sketch map that the back adjustment obtains;
The sketch map of the frame structure that a kind of transition stage adopted that Fig. 7 provides for the utility model embodiment two;
Frame structure sketch map when the transmitting terminal that Fig. 8 provides for the utility model embodiment two connects a plurality of earphone end;
A kind of frame structure sketch map when the employing that Fig. 9 provides for the utility model embodiment two repeatedly retransmits response packet;
Another frame structure sketch map when the employing that Figure 10 provides for the utility model embodiment two repeatedly retransmits response packet.
Embodiment
The accompanying drawing that will combine the utility model below carries out clear, intactly description to the technical scheme of the utility model, and obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the utility model is protected.
The data transmission problems that communication means solved that this programme provides; It is a basic problem in radio digital communication field; Its two ends that come from radio digital communication are separate individualities; So need in the both sides of communication link, realize a kind of communication means, this method guarantees the operate as normal of communication link, and guarantees the normal transmission and the reception of radio frequency bag.Be appreciated that this programme is not limited to wireless headphone system, also applicable to other communication systems that transmission quality is had higher requirements, such as wireless video system, wireless data acquisition system or wireless system for transmitting data etc.
The technical conceive of the utility model mainly is according to the communications status in the wireless digital earphone system; Quantity like system's headphone end; Communication channel quality etc.; Dynamically change the frame structure of periodic transfer radio frequency bag in the communication link, thereby realize a kind of high-quality of wireless digital earphone system use, the communication means of high reliability, improve the wireless transmission bandwidth utilization and reduce system power dissipation effectively.
The utility model embodiment one provides the receiving device in a kind of radio digital communication, and referring to Fig. 1, this receiving device 110 comprises like lower unit:
Adjustment information receiving element 111; Be used to receive frame structure adjustment information from transmitting terminal; Said frame structure adjustment information comprises radio frequency bag adjustment information; Said frame structure adjustment information is that transmitting terminal generates according to the communications status indication information when knowing that communications status changes, said communications status indication information indication receiving-end state and/or channel status;
Frame structure adjustment unit 112 is used to utilize said frame structure adjustment information to adjust employed frame structure, and carries out data communication according to adjusted frame structure and said sending ending equipment.
Further; Above-mentioned receiving-end state can be indicated the receiving terminal that connects with transmitting terminal; As under the scene of wireless digital earphone communication, above-mentioned receiving-end state is an earphone end state, the earphone end that this earphone end state indication and transmitting terminal connect; Perhaps, above-mentioned receiving-end state also can indicate receiving terminal whether successfully to receive the corresponding data bag.The current channel quality of above-mentioned channel status indication communication system.
Further; With under one-period; Adopted when transmitting terminal and the structural adjustment of receiving terminal conducting frame the frame structure adjustment information should be consistent, to guarantee that in transmitting terminal communicates with the identical frame structure of receiving terminal employing with the transmission of the radio frequency bag of one-period.
Be appreciated that; Be applicable to the scene of asynchronous transmission for some; In radio frequency bag transmission with one-period; Transmitting terminal and receiving terminal can adopt frame structure inequality to communicate, then with under one-period, adopted when transmitting terminal and the structural adjustment of receiving terminal conducting frame the frame structure adjustment information should also can be inequality.
According to the difference of real network structure, above-mentioned receiving device 110 can realize that above-mentioned receiving device can be the earphone end in the radio communication earphone system by different devices.Above-mentioned receiving-end state can be indicated the receiving terminal that connects with transmitting terminal; As under the scene of wireless digital earphone communication; Above-mentioned receiving-end state is an earphone end state; The earphone end that this earphone end state indication and transmitting terminal connect, perhaps, above-mentioned receiving-end state also can indicate receiving terminal whether successfully to receive the corresponding data bag.The current channel quality of above-mentioned channel status indication communication system.
When the radio frequency bag adjustment information that generated indication when deletion is corresponding to the response packet of the first earphone end in frame structure; The radio frequency bag adjustment information that is generated is also indicated the retransmission packet of in frame structure, setting up the shared radio frequency bandwidth of response packet that is not more than deletion; And/or; Receive the sequential position of a plurality of response packets in the adjustment frame structure, then above-mentioned frame structure adjustment unit 112 specifically is used for utilizing the radio frequency bag adjustment information that is received to set up the retransmission packet that is not more than the shared radio frequency bandwidth of all first earphone end response packets at frame structure; And/or, the sequential position that the adjustment frame sends response packet in structure;
When the response packet corresponding to the second earphone end is added in the indication of the radio frequency bag adjustment information that generated in frame structure; The radio frequency bag adjustment information that is generated is also indicated the retransmission packet of in frame structure, deleting the shared radio frequency bandwidth of response packet that is not less than interpolation; And/or; The sequential position of the response packet of the required reception of adjustment in frame structure, then the frame structure adjustment unit 112, specifically are used for utilizing the radio frequency bag adjustment information that is received to be not less than the retransmission packet of the shared radio frequency bandwidth of all second earphone end response packets in the frame structure deletion; And/or the sequential position of response packet is sent in adjustment in frame structure.
When if whether above-mentioned earphone end state indication earphone end successfully receives the corresponding data bag; In each frame period; When all packets all successfully receive in the retransmission packet sphere of action of knowing respective frame according to the communications status indication information; Said frame structure adjustment unit 112 specifically was used in each frame period, utilized in the adjusted frame structure of radio frequency bag adjustment information that is received not comprise retransmission packet; Perhaps; In each frame period, when having the data-bag lost situation in the retransmission packet sphere of action of knowing respective frame according to the communications status indication information, according to the definite retransmission packet sequence that is adopted of re-transmission policy; The position of the radio frequency bag adjustment information indication pairing packet of retransmission packet in frame structure that is generated; At this moment, frame structure adjustment unit 112 specifically was used in each frame period; Utilize the radio frequency bag adjustment information that is received to know the retransmission packet sequence that is adopted, and in frame structure, adjust the position of the pairing packet of retransmission packet according to this retransmission packet sequence.And said frame structure adjustment unit 112 in each frame period, according to adjusting employed frame structure with the corresponding to frame structure adjustment information of transmitting terminal, and according to adjusted frame structure, receives the radio frequency bag from transmitting terminal, sends response packet to transmitting terminal.At this moment, receiving device 110 can also utilize the 3rd reception control unit to finish the retransmission packet reception in advance or need not receive retransmission packet, to save power consumption.
If the current channel quality of above-mentioned channel status indication communication system; Above-mentioned frame structure adjustment information also comprises the relative position adjustment information, and the cycle that the indication of this relative position adjustment information is used to carry out the frame structure saltus step is used for the sequential position in the cycle of respective frame structural adjustment information with respect to transmission.
Be provided with frame structure trip point or frame structure hop period in this programme, delta frame structural adjustment information before this frame structure hop period, when the frame structure hop period arrived, transmitting terminal and earphone end adopted new frame structure to communicate simultaneously.Transmitting terminal can be utilized in the frame structure adjustment information generate after, frame structure hop period all frame periods before arriving, the earphone end broadcast frame structural adjustment information that in system, exists.Through the setting of frame structure hop period, guaranteed that transmitting terminal and earphone end can both be known the frame structure adjustment information before the frame structure adjustment, thereby guaranteed the successful realization of adjustment operation.
Then above-mentioned frame structure adjustment unit 112; Specifically be used for according to adjusting employed frame structure with the corresponding to frame structure adjustment information of transmitting terminal; And when the cycle with the saltus step of the corresponding to execution frame structure of transmitting terminal arrives; According to adjusted frame structure, receive radio frequency bag, and send response packet to transmitting terminal from transmitting terminal.
Further, be sent to earphone end equipment in the packet, perhaps, generate controlling packet, controlling packet is sent to receiving device according to the frame structure adjustment information when transmitting terminal is carried at the frame structure adjustment information; At this moment, corresponding, above-mentioned adjustment information receiving element 111 specifically is used for the frame structure adjustment information that receiving end/sending end issues through packet or controlling packet.
Further, receiving terminal can initiatively or according to the information from transmitting terminal finish the retransmission packet reception in advance or need not receive retransmission packet, and to save power consumption, at this moment, above-mentioned receiving device also comprises:
First receives control unit, is used for when the present frame from transmitting terminal comprises retransmission packet, if according to the statistics to the radio frequency bag that received, affirmation does not have data-bag lost in the present frame retransmission range, then reject the retransmission packet from transmitting terminal; And/or,
Second receives control unit, is used for behind at least one retransmission packet that receives present frame, and when confirming in the present frame retransmission range, not have data-bag lost, refusal continues to receive the retransmission packet from transmitting terminal; And/or,
The 3rd receives control unit, is used for when not comprising required retransmission packet in the retransmission packet of confirming not receive in the present frame, rejecting the retransmission packet from transmitting terminal when according to the retransmission packet sequence of being known that transmitting terminal adopted.Here, the retransmission packet that does not receive has two kinds of situation, and a kind of situation is that the retransmission packet no one from transmitting terminal is received; Another kind of situation is to the retransmission packet from transmitting terminal, has received a part, also has the remaining retransmission packet that does not have reception.
Further, this programme also provides the frame structure of another kind of form, referring to Figure 10 and 11; Adopted the frame structure that repeatedly retransmits response packet; Under this frame structure, the every frame radio frequency bag from transmitting terminal of receiving terminal to receiving returns at least two identical response packets to transmitting terminal.And; When having a plurality of receiving terminal, repeatedly retransmit the response packet of each receiving terminal according to set sequential position to transmitting terminal, wherein; Two adjacent in set sequential position response packets belong to different earphone ends, promptly between the response packet of different receiving terminals are alternately to arrange.At this moment, above-mentioned frame structure adjustment unit 112 also specifically is used for the every frame radio frequency bag from transmitting terminal to receiving, and repeatedly retransmits response packet to transmitting terminal; Wherein, when having a plurality of receiving terminal, repeatedly retransmit the response packet of each receiving terminal according to set sequential position to transmitting terminal, two adjacent in set sequential position response packets belong to the different received end.
Further, said adjustment information receiving element 111 specifically is used for the frame structure adjustment information that receiving end/sending end issues through packet, and said frame structure adjustment information is carried in the said packet; Perhaps, the frame structure adjustment information that receiving end/sending end issues through controlling packet, said controlling packet generates according to the frame structure adjustment information.
The concrete working method of each equipment and unit is referring to the related content among the utility model embodiment two among the utility model embodiment one.
By above-mentioned visible; The technical scheme of the utility model embodiment provides a kind of novel wireless digital voice communication scheme; This scheme is made corresponding adjustment strategy according to the practical communication state of the system that gets access to, and the frame structure adjustment information of passing through to be generated makes earphone end and transmitting terminal know the adjustment strategy; Thereby realized a kind of communication that dynamically changes employed frame structure according to communications status; Significantly improved the flexibility of wireless audio transmission system, guaranteed that multiple communication scenes subaudio frequency successful communication realizes, has improved user experience.
Further; This programme can be provided with the particular content of the radio frequency bag of required transmission flexibly, thereby control the required system resource that takies through the dynamic adjustment to frame structure; Can be under the requirement of satisfying high reliability, low delay and low radiation; Reduce system power dissipation to greatest extent, improve usage factor of system resource, have stronger feasibility and wider application prospect.
For the ease of the clear technical scheme of describing the utility model embodiment; In the embodiment of utility model; Adopted printed words such as " first ", " second ", " 1 ", " 2 " function to be distinguished with essentially identical identical entry of effect or similar item, it will be appreciated by those skilled in the art that these printed words and number designation do not limit quantity and execution order with number designation.
Below in conjunction with accompanying drawing 2 to 10, the receiving device in the radio digital communication that the utility model embodiment two is provided describes.In the utility model embodiment; The scene of carrying out radio digital communication with transmitting terminal and earphone end is that example describes; Be appreciated that this programme is not limited to wireless digital earphone communication system, also goes for other communication systems; Like wireless video system, wireless data acquisition system or wireless system for transmitting data etc.For the ease of clearly demonstrating this programme,, at first the application scenarios of the utility model embodiment is described below referring to Fig. 2.
Fig. 2 has shown a kind of basic framework sketch map of wireless digital earphone system.This wireless digital earphone system is made up of a transmitting terminal 100 and a plurality of earphone ends, and like earphone end 1 to earphone end N, N is a label, and the numerical value of N can change according to the actual conditions in the system.Transmitting terminal 100 transmits to each earphone end through radio-frequency module 101 and comprises voice data radio frequency bag, can comprise packet 103 (or controlling packet 103) in this radio frequency bag and receive the response packet 102 that each earphone end returns.The radio-frequency module of each earphone end through separately, as radio-frequency module 111, radio-frequency module 121 receiving end/sending ends send in the middle of the channel packet 103 (or controlling packet 103) and to transmitting terminal echo reply bag 102.
Be appreciated that; When fundamental block diagram shown in Figure 2 is applicable to other radio digital communication systems; These radio digital communication systems comprise a data transmitting terminal and a plurality of data receiver; Data sending terminal sends data, the data of data receiver receiving end/sending end and echo reply bag to each receiving terminal.
In the wireless digital earphone system, transmitting terminal sends to the voice data that obtains in the middle of the channel with the form packing of radio frequency bag and through radio-frequency module, and the earphone end is through radio-frequency module received RF bag and be reduced into voice data in the middle of channel.
Related frame structure is meant the institutional framework of employed periodic radio frequency bag in radio digital communication system among each embodiment of the utility model; Frame structure needs the radio frequency bag number of actual transmissions by this frame, needs to send/decisions such as response packet number that receive.The above-mentioned radio frequency bag that need transmit can comprise one or more in packet, gravity treatment bag, response packet and the controlling packet etc. as required in this programme.
Interior voice data that needs transmission of frame period of above-mentioned data packet transmission, the size of packet is by system's radio-frequency module decision, and quantity of data packets is by frame period and the decision of audio data samples rate.
Above-mentioned response packet transmission earphone end is to the descriptor of all radio frequency bag reception conditions in the frame period.
Required control information in the above-mentioned controlling packet transport communication, in this programme, the frame structure adjustment information that can utilize the controlling packet transmission to be generated.
Consider the existence of channel disturbance, in the ordinary course of things, the form that this programme utilizes packet to add retransmission packet is organized the frame structure of radio frequency transmission, through adopting retransmission packet to guarantee the reliable transmission of voice data.The number of retransmission packet can be confirmed by radio frequency bandwidth, in high bandwidth system communication, can use more retransmission packet to guarantee the reliable transmission of voice data.
The packet of having lost in the time range before the above-mentioned retransmission packet transmission current frame period; Concrete; The packet that needs re-transmission in above-mentioned this retransmission packet sphere of action of retransmission packet transmission; As far as a certain retransmission packet, above-mentioned retransmission packet sphere of action refer to this retransmission packet the scope of the packet before the current frame period that can retransmit.For example, the sphere of action of the employed retransmission packet of wireless digital earphone system is 8 frame periods, so under current frame period N retransmission packet A, the packet that can retransmit is the packet that arbitrary in (N-8) frame period to (N-1) frame period lost.(N-8) frame period here to (N-1) frame period is called the sphere of action of N frame retransmission packet.
Referring to Fig. 4; Shown scene to a transmitting terminal and an earphone end; The example of a kind of frame structure that the utility model embodiment is provided, maximum 1 controlling packet of use, 6 packets, 9 retransmission packets and 1 response packet supported of the transmission bandwidth of radio frequency in this example.
Based on basic framework shown in Figure 2, referring to Fig. 3, the communication means of the wireless digital earphone of the utility model embodiment specifically comprises following processing:
31: transmitting terminal obtaining communication status indication information.
Above-mentioned communications status indication information indication earphone end state and channel status, according to the difference of communications status indicating information contents, the concrete mode of obtaining this information is also different, for example,
Indicate the earphone end that has connected when earphone end state; Promptly this earphone end and transmitting terminal connect; Then transmitting terminal detects through the connection status to the earphone end, and obtaining communication status indication information and record promptly obtain the earphone end state and the record of the earphone end that has connected;
Indicate the earphone end when earphone end state and whether successfully receive the corresponding data bag, transmitting terminal obtains said communications status indication information according to the response packet from the earphone end that receives, and promptly obtains the earphone end state whether the earphone end successfully receives the corresponding data bag;
When the current channel quality of channel status indication communication system, transmitting terminal is through detecting channel status, obtaining communication status indication information, the i.e. channel status of the current channel quality of obtaining communication system;
32: judge whether communications status changes, if execution in step 33 if not, still utilizes current frame structure to carry out transfer of data.
Know that according to the communications status indication information communications status changes, for example:
When a last communications status indication information (like t-1 communications status indication information) the indication first earphone end and the transmitting terminal that get access to have connected; And current communications status indication information (like t communications status indication information) the indication first earphone end is connected with the transmitting terminal disconnection; Confirm that then communications status changes; Promptly there is the earphone end to connect and loses, from wireless communication system, break away from.
When a last communications status indication information (like t-1 communications status indication information) the indication second earphone end and the transmitting terminal that get access to do not connect; And current communications status indication information (like t communications status indication information) indication second earphone end and transmitting terminal successfully connect; Confirm that then communications status changes, and promptly has new earphone end to join in the wireless communication system.
When the channel quality of the first communications status indication information (like t communications status indication information) that gets access to indication is higher than the indicated channel quality of second communication status indication information (like t-3 communications status indication information); Confirm that then communications status changes; Be that improvement has taken place channel conditions, channel quality has improved.
33: delta frame structural adjustment information.
Transmitting terminal has learnt the practical communication state that system is present through above-mentioned communications status indication information; Make corresponding adjustment strategy; And the frame structure adjustment information of passing through to be generated makes earphone end and transmitting terminal know the adjustment strategy; The changing content of communications status indication information indication is different, and the particular content of the frame structure adjustment information that is generated is also different, comprises following four kinds of situation at least:
First kind of situation
In this case; The earphone end that earphone end state indication in the communications status indication information and transmitting terminal connect; Know at least one second earphone end of existence according to the communications status indication information; The condition that this second earphone end satisfies is: a last communications status indication information indicates said second earphone end and transmitting terminal not to connect, and current communications status indication information indicates said second earphone end and transmitting terminal successfully to connect, and promptly has new earphone end to join in the wireless communication system.
Above-mentioned frame structure adjustment information comprises radio frequency bag adjustment information, and at this moment, the response packet corresponding to the second earphone end is added in the radio frequency bag adjustment information indication that is generated in frame structure.At this; Scene in conjunction with shown in Figure 4 specifies, if Fig. 4 show be exemplified as the frame structure before communications status changes the time, then referring to Fig. 5; Shown the frame structure example that adjustment obtains behind the last new earphone end of connection in the system, promptly Fig. 5 has shown the frame structure example after communications status changes.
The frame structure of frame structure among Fig. 5 in Fig. 4; The main distinction is to have reduced in the frame structure of transmitting terminal the number of retransmission packet; Reducing retransmission packet is in order to discharge the shared bandwidth resources of this retransmission packet; Response packet (response packet 2 shown in Figure 4) to give newly-increased earphone end 2 (i.e. the second earphone end) distributes bandwidth, thereby accomplishes the transmission of the response packet of earphone end 2.
Because frame structure shown in Figure 4 has reached the maximum tenability of the transmission bandwidth of radio frequency; So at this, add fashionablely as new earphone end, must reduce retransmission packet; And; Here 1 retransmission packet that reduces is an example description, also can reduce a plurality of retransmission packets, as long as guarantee in frame structure, to delete the retransmission packet that required radio frequency bandwidth is not less than the shared radio frequency bandwidth of response packet of interpolation.When the shared radio frequency bandwidth of retransmission packet was identical with the shared radio frequency bandwidth of response packet, the quantity of the retransmission packet that is reduced was greater than the quantity that equals required newly-increased response packet.Be appreciated that if bandwidth resources are sufficient in the system, also can need not to reduce retransmission packet.
From the above mentioned; When the response packet corresponding to the second earphone end is added in the indication of the radio frequency bag adjustment information that generated in frame structure; Above-mentioned radio frequency bag adjustment information can also be indicated: deletion is not less than the retransmission packet of the shared radio frequency bandwidth of response packet of interpolation in the transmitting terminal frame structure; The required radio frequency bandwidth of the retransmission packet of promptly being deleted is not less than the shared radio frequency bandwidth of response packet of interpolation, perhaps, in the transmitting terminal frame structure, deletes the retransmission packet of the shared radio frequency bandwidth of response packet that is not less than interpolation and adjusts the sequential position that receives earphone end response packet in the frame structure; Perhaps, only adjust the sequential position that receives earphone end response packet in the frame structure.
At the earphone end; Accordingly; Utilize the radio frequency bag adjustment information that is received in frame structure, to delete the retransmission packet that is not less than the shared radio frequency bandwidth of all second earphone end response packets; Promptly the required radio frequency bandwidth of the retransmission packet of deleting be not less than the shared radio frequency bandwidth of all second earphone end response packets, perhaps, deletion is not less than the sequential position of sending response packet in retransmission packet and the adjustment frame structure of the shared radio frequency bandwidth of all second earphone end response packets; Perhaps, only adjust the sequential position of sending response packet in the frame structure.
Second kind of situation
In this case; The earphone end that earphone end state indication in the communications status indication information and transmitting terminal connect; Know at least one first earphone end of existence according to the communications status indication information, the condition that this first earphone end satisfies is: a last communications status indication information indicates the first earphone end and transmitting terminal successfully to connect, and current communications status indication information indicates the first earphone end and transmitting terminal disconnection to be connected; Promptly there is the earphone end to connect and loses, from wireless communication system, break away from.
Above-mentioned frame structure adjustment information comprises radio frequency bag adjustment information, at this moment, corresponding to the response packet of the first earphone end, promptly no longer comprises the response packet corresponding to the first earphone end in the frame structure of transmitting terminal in the radio frequency bag adjustment information indication delete frame structure that is generated.At this; Scene in conjunction with shown in Figure 5 specifies, if Fig. 5 show be exemplified as the frame structure example before communications status changes the time, then referring to Fig. 6; Shown that the frame structure example that the back adjustment obtains is lost in an earphone end connection in the system, the frame structure example after promptly communications status changes.
Fig. 6 connects 2 earphone ends to transmitting terminal to explain to the frame structure variation of losing an earphone end., uses transmitting terminal frame structure as shown in Figure 5 when connecting last two earphone ends; The transmitting terminal frame structure that transmitting terminal uses in this structure can be referred to as transmitting terminal frame structure 2; Earphone end 1 uses earphone end frame structure can be referred to as earphone end frame structure 1, and earphone end 2 uses earphone end frame structure can be referred to as earphone end frame structure 2; After earphone end 1 breaks off connection (or connection is lost), need use frame structure shown in Figure 6 so, transmitting terminal uses the transmitting terminal frame structure can be referred to as transmitting terminal frame structure 1 in this structure, and earphone end 2 uses earphone end frame structures can be referred to as earphone end frame structure 3.
Comparison through Fig. 5 and Fig. 6 can be found out, after earphone end 1 is lost, has increased the number of retransmission packet in the frame structure of transmitting terminal (transmitting terminal frame structure 1), and no longer keeps the response packet (response packet 1 shown in Figure 5) of the earphone end of losing 1; Correspondingly; Increased retransmission packet in the frame structure of earphone end 2 (earphone end frame structure 1), because the deletion of response packet 1 can not impact the sequential position of response packet 2, whether the response packet 2 in these 9 pairs of earphone ends 2 of retransmission packet of mainly considering to increase impacts; If not; Then need not to adjust the sequential position of response packet 2 in the earphone end frame structure 2, if then need adjust the sequential position of response packet 2 in the earphone end frame structure 2; In the scene of Fig. 6 the sequential position of response packet 2 adjusted to the position of response packet 1 in the earphone end frame structure 1, obtain earphone end frame structure 3.
At this, the operation that has increased the retransmission packet number is not necessary, can keep original retransmission packet quantity constant, perhaps, when detecting current channel quality when better, can also reduce the number of retransmission packet, to save system bandwidth.Be not more than the shared radio frequency bandwidth of response packet of deletion as long as guarantee the required radio frequency bandwidth of retransmission packet set up, mainly the scene when identical with the shared radio frequency bandwidth of response packet is the example explanation with the shared radio frequency bandwidth of retransmission packet in above-mentioned description to Fig. 5 and Fig. 6.
From the above mentioned; When in the radio frequency bag adjustment information that the generated indication delete frame structure during corresponding to the response packet of the first earphone end; Above-mentioned radio frequency bag adjustment information can also be indicated: transmitting terminal is set up the retransmission packet of the shared radio frequency bandwidth of response packet that is not more than deletion in frame structure; The required radio frequency bandwidth of the retransmission packet of promptly being set up is not more than the shared radio frequency bandwidth of response packet of deletion; Perhaps, in frame structure, set up the retransmission packet of the shared radio frequency bandwidth of response packet that is not more than deletion and adjust in the frame structure sequential position that receives earphone end response packet; Perhaps, only adjust the sequential position that receives earphone end response packet in the frame structure.
At the earphone end; Accordingly; Utilize the radio frequency bag adjustment information that is received in frame structure, to set up the retransmission packet that is not more than the shared radio frequency bandwidth of all first earphone end response packets, perhaps, in frame structure, set up the retransmission packet that is not more than the shared radio frequency bandwidth of all first earphone end response packets and adjust the sequential position of sending response packet in the frame structure; Perhaps, only adjust the sequential position of sending response packet in the frame structure.
Because available technology adopting is the mode of earphone end reserved bandwidth resource in advance; Even the earphone end is in not-connected status, can't carry out the transmission of data, system still is that this earphone end keeps respective bandwidth; Cause the waste of bandwidth resources, caused bandwidth availability ratio lower.In order to address this problem, further, transmitting terminal is after earphone end 1 is lost, and discharging is this earphone end bandwidth reserved resource in advance, the bandwidth resources that discharged is redistributed, thereby further improved usage factor of system resource.
The third situation
In this case, whether the indication of the earphone end state in communications status indication information earphone end successfully receives the corresponding data bag.Transmitting terminal obtains said communications status indication information according to the response packet from the earphone end that receives.Because response packet has been described the reception condition of radio frequency bag in each frame period, so transmitting terminal can learn according to response packet whether the earphone end successfully receives the corresponding data bag.
Under the third situation, under each frame period, decision-making does not comprise retransmission packet in frame structure according to re-transmission policy by transmitting terminal, does not send retransmission packet to the earphone end.Employed determining method when re-transmission policy is meant retransmission packet sequence and the quantity of sending retransmission packet according to this frame of the response packet of a plurality of earphone ends decision needs at transmitting terminal.
For example, transmitting terminal does not comprise retransmission packet in the frame structure of the radio frequency bag adjustment information indication that is generated when all packets all successfully receive in the retransmission packet sphere of action of knowing respective frame according to the communications status indication information.Above-mentioned respective frame is the reference frame that foundation is adjusted in selected conduct in the adjustment frame structure; When all packets successfully receive in the retransmission packet sphere of action of respective frame; The retransmission packet of promptly deleting this respective frame can not influence the reception of data, then thinks not comprise that retransmission packet also can guarantee the normal reception of data in the adjusted frame structure.
At this moment, corresponding, do not comprise retransmission packet in the adjusted frame structure of radio frequency bag adjustment information that the utilization of earphone end is received.
Further, this programme also provides a kind of scheme of frame structure adjustment, retransmission packet (like the retransmission packet sequence) is adjusted according to the reception condition of retransmission packet in each frame period, and is specific as follows:
In each frame period; When in transmitting terminal is known the retransmission packet sphere of action of respective frame, having the data-bag lost situation, confirm the retransmission packet sequence that adopted according to re-transmission policy, according to the position of retransmission packet in this retransmission packet sequence adjustment frame structure; And this retransmission packet sequence informed corresponding earphone end; For example, this retransmission packet sequence is carried at is issued to the earphone end in the controlling packet, to carry out data communication according to adjusted frame structure and said earphone end.
This mode is confirmed the retransmission packet sequence in advance by transmitting terminal in frame structure, the retransmission packet sequence is indicated the position of the pairing packet of different retransmission packets.
Accordingly, at the earphone end, the packet that the radio frequency bag adjustment information that utilization is received is retransmitted according to the retransmission packet sequential reception of knowing from transmitting terminal.
Under this processing mode; Transmitting terminal is confirmed can pass through controlling packet (or packet) after the good retransmission packet sequence that needs to retransmit; Earphone ends all in system are broadcasted the retransmission packet sequence information; The earphone end receives that then the earphone end will finish the reception of retransmission packet in advance, with the saving system power dissipation when retransmission packet sequence of finding current received frame after the controlling packet does not comprise the retransmission packet of self needss.
From the above mentioned, not to earphone end transmission retransmission packet and in advance according to two kinds of scenes of the definite retransmission packet sequence that is adopted of re-transmission policy, can under each frame period, carry out in the third situation; Then in each frame period, transmitting terminal is adjusted employed frame structure according to the frame structure adjustment information, and according to adjusted frame structure; Send the radio frequency bag to the earphone end, and receive response packet from the earphone end, corresponding; The earphone end is according to adjusting employed frame structure with the corresponding to frame structure adjustment information of transmitting terminal; And, receive radio frequency bag, and send response packet to transmitting terminal from transmitting terminal according to adjusted frame structure.
In this case, after delta frame structural adjustment information this frame structure adjustment information adjustment frame structure capable of using, need not to wait for the arrival of frame structure trip point, reached the effect of real-time adjustment frame structure.
Be appreciated that this programme in the third situation also and be not precluded within the mode of carrying out the frame structure adjustment after the arrival of frame structure trip point again.
The 4th kind of situation
In this case, know that according to the communications status indication information current channel quality compares former channel quality and improved or reduced.Transmitting terminal can be through detecting the obtaining communication status indication information to channel status.
At this, current channel quality, former channel quality all are the measurement statisticses to some frame period channel qualities in the certain limit.
" current " refers to carry out Channel Detection and generates the frame period scope that this is used to adjust the communications status indication information of frame structure; This frame period scope is generally a plurality of frame periods, and current channel quality is the result that channel quality statistics in the current frame period scope is obtained.
Be provided with frame structure trip point or frame structure hop period in this programme, delta frame structural adjustment information before this frame structure hop period, when the frame structure hop period arrived, transmitting terminal and earphone end adopted new frame structure to communicate simultaneously.Transmitting terminal can be utilized in the frame structure adjustment information generate after, frame structure hop period all frame periods before arriving, the earphone end broadcast frame structural adjustment information that in system, exists.Through the setting of frame structure hop period, guaranteed that transmitting terminal and earphone end can both be known the frame structure adjustment information before the frame structure adjustment, thereby guaranteed the successful realization of adjustment operation.
Above-mentioned frame structure adjustment information comprises the relative position adjustment information, and the cycle that the indication of this relative position adjustment information is used to carry out the frame structure saltus step is with respect to the sequential position in the cycle that is used to send respective frame structural adjustment information; When the indicated channel quality of the first communications status indication information was higher than the indicated channel quality of second communication status indication information, the numerical value of the sequential position that the relative position adjustment information that then generates according to the first communications status indication information is indicated was less than the numerical value of the indicated sequential position of the relative position adjustment information that generates according to the second communication status indication information.
34: the frame structure adjustment information is sent to corresponding earphone end.
Transmitting terminal can be carried at the frame structure adjustment information and be sent to the earphone end in the packet, perhaps, generates controlling packet by the frame structure adjustment information, as the frame structure adjustment information being packaged into a controlling packet separately, controlling packet is sent to the earphone end.
Accordingly, the frame structure adjustment information that earphone end receiving end/sending end issues through packet, this frame structure adjustment information is carried in the packet; Perhaps, the frame structure adjustment information that earphone end receiving end/sending end issues through controlling packet, this controlling packet generates according to the frame structure adjustment information.
35: adjust employed frame structure, and carry out data communication according to adjusted frame structure.
After the frame structure hop period arrives; Transmitting terminal and earphone end are all adjusted employed frame structure according to the frame structure adjustment information of being known; And when the cycle of carrying out the frame structure saltus step arrives; According to adjusted frame structure, transmitting terminal sends the radio frequency bag to the earphone end, and receives the response packet from the earphone end.
Further, utilizing before said frame structure adjustment information adjusts employed frame structure, promptly in the transition stage of waiting for that the frame structure hop period arrives, this method also comprises:
Response packet is forbidden receiving in the position of the corresponding first earphone end in the response packet of current institute use frame structure.Also need certain power consumption because transmitting terminal starts radio frequency bag receiving function and is in accepting state,, further reduced power consumption through forbidding receiving function.
Referring to Fig. 7; The sketch map that has shown the frame structure that a kind of transition stage adopted; Transmitting terminal thinks that earphone end 1 loses; The employed frame structure of the framing control transition stage of going on the air, transmitting terminal forbids receiving response packet to reduce power consumption in the position of the response packet (response packet 1) of earphone end 1 in this frame structure.
Only with a transmitting terminal and an earphone end, perhaps a transmitting terminal and two earphone ends are that example is illustrated in the foregoing description.Yet this programme is not limited thereto, and this programme can be suitable for the scene that comprises a plurality of earphone ends flexibly, referring to Fig. 8, has shown the frame structure sketch map when transmitting terminal connects a plurality of earphone end.When x earphone end gone up in the transmitting terminal connection; The frame structure of system is made up of 1 controlling packet, 6 packets, a n retransmission packet and x response packets, and wherein, x response packet is corresponding to x earphone end; For example; Response packet 1 is corresponding to earphone end 1, and response packet 2 is corresponding to earphone end 2, and response packet x is corresponding to earphone end x.The maximum number of the earphone end of the maximum of x system's support just here, x is determined by the factors such as size of radio frequency bandwidth, frame period length and radio frequency bag jointly.
Further, this programme also is provided with a kind of mechanism that retransmission packet receives that initiatively finishes for the earphone end, comprises following processing:
When comprising retransmission packet in the present frame from transmitting terminal; If according to statistics to the radio frequency bag that received; Affirmation does not have data-bag lost in the present frame retransmission range, then reject the retransmission packet from transmitting terminal, and promptly all packets all successfully receive; Do not need to carry out again the reception of retransmission packet, to save power consumption; Perhaps,
Behind at least one retransmission packet that receives present frame; When affirmation does not have data-bag lost in the present frame retransmission range; Refusal continues to receive the retransmission packet from transmitting terminal; Promptly through current with the retransmission packet that receives successfully received the current frame period retransmission packet all packets in the ability sphere of action, then finish the reception operation of retransmission packet in advance, to save power consumption.
Because the re-transmission policy that this programme adopted is to be based upon response packet to return transmitting terminal, describe by response packet on the basis of radio frequency bag reception condition, so, need guarantee the correct transmission of response packet as far as possible for the optimum that guarantees re-transmission policy uses.
For reaching this effect, this programme also provides the frame structure of another kind of form, referring to Fig. 9 and 10; Adopted the frame structure that repeatedly retransmits response packet; Under this frame structure, the every frame radio frequency bag from transmitting terminal of earphone end to receiving returns at least two response packets to transmitting terminal.The concrete number of times that is adopted or the number of response packet are confirmed according to system factors such as radio frequency bandwidth, system power dissipations.Clear in order to narrate, Fig. 9 has provided system with Figure 10 and has been connected the frame structure that later on employed 2 response packets of a plurality of earphone ends retransmit.Frame structure among relative Fig. 9; Figure 10 has carried out temporal dislocation with the re-transmission of response packet; Promptly adjusted the sequential position of response packet, caused whole the losing of same earphone end response packet, guaranteed that response packet can successfully transfer to transmitting terminal with the bursty interference of avoiding the short time.
By above-mentioned visible; The technical scheme of the utility model embodiment provides a kind of novel wireless digital voice communication scheme; This scheme is made corresponding adjustment strategy according to the practical communication state of the system that gets access to, and the frame structure adjustment information of passing through to be generated makes earphone end and transmitting terminal know the adjustment strategy; Thereby realized a kind of communication that dynamically changes employed frame structure according to communications status; Significantly improved the flexibility of wireless audio transmission system, guaranteed that multiple communication scenes subaudio frequency successful communication realizes, has improved user experience.
Further; This programme can be provided with the particular content of the radio frequency bag of required transmission flexibly, thereby control the required system resource that takies through the dynamic adjustment to frame structure; Can be under the requirement of satisfying high reliability, low delay and low radiation; Reduce system power dissipation to greatest extent, improve usage factor of system resource, have stronger feasibility and wider application prospect.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the scope of the utility model protection.
Claims (1)
1. the receiving device in the radio digital communication is characterized in that said equipment comprises:
The adjustment information receiving element; Be used to receive frame structure adjustment information from transmitting terminal; Said frame structure adjustment information comprises radio frequency bag adjustment information; Said frame structure adjustment information is that transmitting terminal generates according to the communications status indication information when knowing that communications status changes, said communications status indication information indication receiving-end state and/or channel status;
The frame structure adjustment unit is used to utilize said frame structure adjustment information to adjust employed frame structure, and carries out data communication according to adjusted frame structure and said transmitting terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203700854U CN202488728U (en) | 2011-09-30 | 2011-09-30 | Receiving terminal device in wireless digital communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203700854U CN202488728U (en) | 2011-09-30 | 2011-09-30 | Receiving terminal device in wireless digital communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202488728U true CN202488728U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203700854U Expired - Lifetime CN202488728U (en) | 2011-09-30 | 2011-09-30 | Receiving terminal device in wireless digital communication |
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| Country | Link |
|---|---|
| CN (1) | CN202488728U (en) |
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2011
- 2011-09-30 CN CN2011203700854U patent/CN202488728U/en not_active Expired - Lifetime
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
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Granted publication date: 20121010 |
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