CN112566081B - Bluetooth multichannel receiving method and system and electronic equipment - Google Patents
Bluetooth multichannel receiving method and system and electronic equipment Download PDFInfo
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- CN112566081B CN112566081B CN202011266995.8A CN202011266995A CN112566081B CN 112566081 B CN112566081 B CN 112566081B CN 202011266995 A CN202011266995 A CN 202011266995A CN 112566081 B CN112566081 B CN 112566081B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention provides a Bluetooth multichannel receiving method, and relates to the field of Bluetooth communication. The method comprises the following steps: receiving cyclic redundancy check information and load data of each Bluetooth receiving branch in the multipath Bluetooth receiving branches; in one mode, when the cyclic redundancy check information in at least one Bluetooth receiving branch is correct, determining not to retransmit. The invention also provides a Bluetooth multichannel receiving system and electronic equipment. The retransmission times of the Bluetooth system are effectively reduced to improve the communication efficiency, and high-quality and reliable Bluetooth information transmission is completed.
Description
The invention is as follows: on the year 09 of 2018, the patent application number is 201810136533.0, and the invention is a divisional application of a China patent application of 'Bluetooth multichannel receiving method, system and electronic equipment'.
Technical Field
The present invention relates to bluetooth communication technology, and in particular, to a bluetooth multichannel receiving method, system and electronic device.
Background
The wide development of bluetooth technology makes bluetooth products and services part of life of people, and especially audio applications such as bluetooth headphones and bluetooth speakers bring great life convenience to people. However, as requirements of people on audio performance, communication distance and communication reliability are higher and higher, the disadvantage of the bluetooth technology designed with low cost and low power consumption as targets on communication distance and reliability is more and more obvious. The audio transmission of bluetooth mainly adopts a transmission technology without error correction coding and an error automatic retransmission mechanism based on 16-bit cyclic redundancy check (CRC: cyclic Redundancy Check). In increasingly complex interference and fading environments, the number of retransmissions required will be greater, resulting in a reduction in the effective bandwidth or an increase in the audio delay of asynchronous communications, and in a limited number of retransmissions of the voice synchronous link being insufficient to meet the requirements of high quality call performance. And the probability of CRC resulting in a cyclic redundancy check being absent but actual data errors is becoming increasingly intolerable relative to long reliable transmission or long audio transmission requirements.
The Bluetooth wireless communication system mainly adopts a frequency diversity technology based on an adaptive frequency modulation and automatic retransmission mechanism to resist interference and frequency selective fading. Based on the low cost and low power consumption, the Bluetooth wireless communication system does not consider the space diversity technology of effective multi-antenna transceiving to resist interference and fading from the aspect of system design. Even with multi-antenna reception, existing designs employ antenna selection diversity techniques or demodulation techniques that combine equal gain and maximum ratio. The antenna selection diversity technology is to select a receiving branch with the largest receiving energy (the smallest space fading) to demodulate a signal, so that the performance loss caused by signal fading can be reduced to a certain extent, and the transmission performance is improved. The demodulation technique of equal gain and maximum ratio combining is coherent combining based on coherent demodulation. The Bluetooth wireless communication system adopts Gaussian frequency shift keying (GFCK: gauss frequency Shift Keying) modulation and differential phase (DPSK: differential Phase Shift Keying) modulation, and is not specially designed for coherent adjustment or coherent combination, nor is the channel estimation mechanism designed for coherent combination.
Disclosure of Invention
In view of the above, the embodiments of the present invention are expected to provide a bluetooth multichannel receiving method, system and electronic device, which are aimed at solving the problems of the prior art in the bluetooth wireless communication system of the multi-antenna receiving or multi-antenna diversity technology.
In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:
an embodiment of the present invention provides a bluetooth multichannel receiving method, where the method includes:
receiving cyclic redundancy check information and load data of each Bluetooth receiving branch in the multipath Bluetooth receiving branches;
in one mode, when the cyclic redundancy check information in at least one Bluetooth receiving branch is correct, determining not to retransmit.
The second aspect of the embodiment of the invention also provides a Bluetooth multichannel receiving system, which comprises a multipath Bluetooth receiving branch and a retransmission processor, wherein the Bluetooth receiving branch comprises a receiving antenna, a radio frequency receiver and a baseband processor;
a receiving antenna for receiving an external wireless signal;
a radio frequency receiver for converting a wireless signal into a baseband signal;
the baseband processor is used for analyzing the cyclic redundancy check information and the load data from the baseband signal;
a retransmission processor configured to perform the steps of the method according to the first aspect of the embodiment of the invention.
A third aspect of the embodiment of the present invention provides an electronic device, where the electronic device includes the bluetooth multichannel receiving system according to the second aspect of the embodiment of the present invention.
The beneficial effects of the invention are as follows: the invention adopts a multipath Bluetooth receiving branch to receive cyclic redundancy check information and load data, then under different working modes, determines whether retransmission is required according to the cyclic redundancy check information and/or the load data, screens out output data from the load data which is not required to be retransmitted, and under the premise of providing a more efficient working mode, does not need to carry out retransmission judgment only on the basis of the existing cyclic redundancy check, does not need to modify a Bluetooth protocol, realizes multi-antenna space diversity to improve Bluetooth wireless transmission efficiency, thereby effectively reducing retransmission times of a Bluetooth system to improve communication efficiency and finishing high-quality reliable Bluetooth information transmission.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a flowchart of a bluetooth multichannel receiving method according to embodiment 1 of the present invention;
fig. 2 is a retransmission determination flow chart according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a bluetooth multichannel receiving system according to embodiment 2 of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of exemplary embodiments of the present invention is provided in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention and not exhaustive of all embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
Example 1
As shown in fig. 1, this embodiment proposes a bluetooth multichannel receiving method, which includes:
s101, cyclic redundancy check information and load data in a plurality of Bluetooth receiving branches are received.
Specifically, in the bluetooth multichannel receiving method of the embodiment, multiple bluetooth receiving branches are adopted to receive wireless signals, wherein the multiple bluetooth receiving branches are mutually independent and do not interfere with each other. More specifically, each path of bluetooth receiving branch has the same composition structure, and the bluetooth receiving branch comprises a receiving antenna, a radio frequency receiver and a baseband processor, wherein the receiving antenna receives wireless signals and sends the wireless signals to the radio frequency receiver for conversion of baseband signals, and the baseband processor analyzes the baseband signals to obtain cyclic redundancy check information and load data. And then carrying out subsequent retransmission analysis through the cyclic redundancy check information and the load data.
S102, determining a current working mode, and determining whether load data in the multi-path Bluetooth receiving branch is retransmitted or not according to cyclic redundancy check information and/or load data in the multi-path Bluetooth receiving branch in the current working mode.
Specifically, the cyclic redundancy check information and the load data obtained in step S101 will be used as important indicators for determining whether the information needs to be retransmitted. In this embodiment, two alternative processing modes for retransmission decisions are provided, including a first mode (efficient transmission mode) and a second mode (reliable transmission mode). As shown in fig. 2, in the efficient transmission mode, when the cyclic redundancy check information in at least one bluetooth receiving branch is correct, the retransmission is ended, otherwise, retransmission is applied until the retransmission is overtime or there is no retransmission times. And in a reliable transmission mode, when the cyclic redundancy check information in at least two paths of Bluetooth receiving branches is correct and the load data in the two paths of Bluetooth receiving branches is completely the same, stopping retransmission, otherwise, reserving the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information, comparing with the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information in the next retransmission, and applying for retransmission. The above is simply a summary illustrating the workflow in the two processing modes below, each of which is specifically analyzed.
Efficient transmission mode: if the cyclic redundancy check information in one Bluetooth receiving branch is correct, retransmission is not required, and if the cyclic redundancy check information of all Bluetooth receiving branches is incorrect, retransmission is required. Because of parallel multi-branch reception, the retransmission times are inevitably reduced to improve the transmission efficiency, or the communication quality under the same limitation of the retransmission times is improved.
From the above description, it can be obtained that the case where retransmission is not required in the efficient transmission mode includes:
when the cyclic redundancy check information in at least one Bluetooth receiving branch is judged to be correct,
or judging that the cyclic redundancy check information in all Bluetooth receiving branches is incorrect and the retransmission time exceeds the preset retransmission time,
or when the cyclic redundancy check information in all Bluetooth receiving branches is incorrect and the residual retransmission times are smaller than or equal to the preset retransmission times, sending a retransmission stopping request.
The preset retransmission time and retransmission times are set according to the delay requirement of a specific application, for example, the retransmission times of voice transmission can be set to 3 times, the maximum retransmission time of music playing can be set to 10 times, and the retransmission times of link information can be infinite. The preset retransmission time and retransmission times described below can also refer to the above schemes.
Correspondingly, the case that retransmission is needed in the efficient transmission mode includes:
judging that the cyclic redundancy check information in all Bluetooth receiving branches is incorrect and the retransmission time does not exceed the preset retransmission time,
or when the cyclic redundancy check information in all Bluetooth receiving branches is incorrect and the residual retransmission times are larger than the preset retransmission times, sending an application retransmission request.
Reliable transmission mode: and if the cyclic redundancy check information of at least two paths of Bluetooth receiving branches is correct and the load data contrast is identical, stopping retransmission, otherwise, requesting retransmission. The cyclic redundancy check information is correct, but the data is stored in comparison with different data, so that the cyclic redundancy check information can be conveniently compared with load data with the correct cyclic redundancy check information received by the next retransmission multi-channel.
From the above description, it can be obtained that the case where retransmission is not required in the reliable transmission mode includes:
when the cyclic redundancy check information in at least two paths of Bluetooth receiving branches is judged to be correct and the load data in at least two paths of Bluetooth receiving branches are the same,
or when the cyclic redundancy check information in at least one Bluetooth receiving branch is judged to be correct and the retransmission time exceeds the preset retransmission time,
or when the cyclic redundancy check information in at least one Bluetooth receiving branch is judged to be correct and the residual retransmission times are smaller than or equal to the preset retransmission times, sending a retransmission stopping request.
Correspondingly, the case where retransmission is required in the reliable transmission mode includes:
when the cyclic redundancy check information in at least one Bluetooth receiving branch is judged to be correct and the retransmission time is not preset,
or when the cyclic redundancy check information in at least one Bluetooth receiving branch is judged to be correct and the residual retransmission times are larger than the preset retransmission times, the first load data in the Bluetooth receiving branch with the correct cyclic redundancy check information is reserved, and a retransmission request is sent until a second load data identical to the first load data appears after retransmission, and the retransmission request is sent.
The second load data is the same load data as the first load data in other Bluetooth receiving branches with correct cyclic redundancy verification information after retransmission.
S103, screening out output data from the load data which is not retransmitted.
Specifically, the load data that need not be retransmitted has been acquired in step S102 through two processing modes, and a process of screening output data from the load data that need not be retransmitted is specifically described below.
First, in the efficient transmission mode:
when judging that the cyclic redundancy check information in only one Bluetooth receiving branch is correct, taking the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information as output data;
when the cyclic redundancy check information in the multiple Bluetooth receiving branches is judged to be correct, and load data in at least two Bluetooth receiving branches in the Bluetooth receiving branches with the correct cyclic redundancy check information are the same, the same load data is selected as output data;
and when the cyclic redundancy check information in the multipath Bluetooth receiving branches is judged to be correct and the load data in the Bluetooth receiving branches with the correct cyclic redundancy check information are different, selecting the load data in the Bluetooth receiving branch with the largest received signal strength in the Bluetooth receiving branches with the correct cyclic redundancy check information as output data.
Second, in reliable transmission mode:
when the cyclic redundancy check information in at least two paths of Bluetooth receiving branches is judged to be correct and the load data in at least two paths of Bluetooth receiving branches are the same, the same load data is used as output data;
judging that the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time, or judging that the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the residual retransmission times are smaller than or equal to the preset retransmission times, if only the cyclic redundancy check information in one path of Bluetooth receiving branch is correct, taking the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information as output data;
judging that the cyclic redundancy check information in the two paths of Bluetooth receiving branches is correct and the retransmission time exceeds the preset retransmission time, or when judging that the cyclic redundancy check information in the two paths of Bluetooth receiving branches is correct and the residual retransmission times are smaller than or equal to the preset retransmission times, if the load data in the two paths of Bluetooth receiving branches are different, selecting the load data in the Bluetooth receiving branches with high received signal strength from the two paths of Bluetooth receiving branches as output data;
and when the cyclic redundancy check information in more than two Bluetooth receiving branches is judged to be correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in more than two Bluetooth receiving branches is judged to be correct and the residual retransmission times are smaller than or equal to the preset retransmission times, if the load data in more than two Bluetooth receiving branches are different, the load data in three Bluetooth receiving branches with the maximum received signal strength are selected from the more than two Bluetooth receiving branches to be used as 1/3 decoded results to be the most output data.
The working principle of 1/3 decoding is as follows: the comparison of the three bits at the same position selects 2 or 3 identical bits as the correct result.
The above process completes the output data screening under different processing modes, and after the output data is determined, the output data is sent to the Bluetooth protocol processor for subsequent processing. All retransmission judgment flows are completed.
Example 2
As shown in fig. 3, the present embodiment provides a bluetooth multichannel receiving system, where the system includes a multipath bluetooth receiving branch and a retransmission processor, and the bluetooth receiving branch includes a receiving antenna, a radio frequency receiver, and a baseband processor;
a receiving antenna for receiving an external wireless signal;
a radio frequency receiver for converting a wireless signal into a baseband signal;
the baseband processor is used for analyzing the cyclic redundancy check information and the load data from the baseband signal;
a retransmission processor configured with operational instructions executable by the retransmission processor to perform operations comprising:
receiving cyclic redundancy check information and load data in a plurality of Bluetooth receiving branches;
judging a current working mode, wherein the working mode comprises a first mode and a second mode;
in the current working mode, determining whether load data in the multi-path Bluetooth receiving branch are retransmitted or not according to cyclic redundancy check information and/or load data in the multi-path Bluetooth receiving branch;
and screening out output data from the load data which does not need to be retransmitted.
Specifically, in this embodiment, on the basis of the existing bluetooth single-path receiver, at least one bluetooth receiving branch and a retransmission processor are added in parallel, where the retransmission processor is connected to the bluetooth protocol processor and is configured to receive output data sent by the retransmission processor. In addition, before the Bluetooth receiving branch receives the wireless signal, the Bluetooth protocol processor sets a receiving channel, a synchronous code and a receiving time according to the frequency calculated by the frequency modulation algorithm. After the wireless signals are received by the receiving antenna, the wireless signals are respectively processed into baseband signals by the radio frequency receiver, cyclic redundancy check information and load data are analyzed by the baseband processor, and then the baseband signals are transmitted to the retransmission processor for further retransmission judgment processing.
The retransmission processor of the present embodiment is provided with two operation modes, wherein one operation mode is an efficient transmission mode, and the other operation mode is a reliable transmission mode.
When the retransmission processor is set to be in the efficient transmission mode, judging whether the cyclic redundancy check information of at least one path in the multipath Bluetooth receiving branches is correct or not:
if all the cyclic redundancy check information of the Bluetooth receiving branches are incorrect, and if the retransmission is judged not to be overtime or the number of the remaining retransmission times, the Bluetooth protocol processor applies for retransmission.
If all the cyclic redundancy check information of the Bluetooth receiving branches are incorrect, and the retransmission is overtime or the retransmission times are not carried out, the retransmission is stopped, and the subsequent processing is carried out through the Bluetooth protocol processor.
If only one path of the cyclic redundancy check information of the Bluetooth receiving branch passes, the load data of the Bluetooth receiving branch is sent to the Bluetooth protocol processor as a final result to be processed and retransmission is stopped.
If the cyclic redundancy information of the multiple Bluetooth receiving branches is correct and the load data of at least two Bluetooth receiving branches are the same, the same load data is selected as output data to be sent to a Bluetooth protocol processor for processing and retransmission is stopped.
If the load data in all the Bluetooth receiving branches with the correct cyclic redundancy check information are different, selecting the load data in the Bluetooth receiving branch with the maximum received signal strength and the correct cyclic redundancy check information as output data to be sent to a Bluetooth protocol processor for processing and stopping retransmission.
When the retransmission processor is set to a reliable transmission mode, judging whether the cyclic redundancy check information of at least two paths of Bluetooth receiving branches passes or not and the load data are the same (the accumulated meaning is that all Bluetooth receiving branches with the accumulated cyclic redundancy check information being correct in the process of repeated retransmission):
when the cyclic redundancy check information of at least two paths of Bluetooth receiving branches passes and the load data are the same, the same load data are sent to a Bluetooth protocol processor as output data to be processed, and retransmission is stopped.
When the cyclic redundancy check information of the two paths of the Bluetooth receiving branches do not pass through and the load data are the same, and the retransmission is judged to have no timeout or the residual retransmission times, the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information are reserved, the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information received in the next retransmission is compared, and retransmission is applied through a Bluetooth protocol processor.
When the cyclic redundancy check information of two paths of the Bluetooth receiving branches do not pass and the load data are the same, judging that retransmission is overtime or retransmission times are not carried out, if only one path of cyclic redundancy check information is correct, the load data of the two paths of Bluetooth receiving branches are used as output data to be sent to a Bluetooth protocol processor for processing, and retransmission is stopped.
When the cyclic redundancy check information of the two paths of accumulated Bluetooth receiving branches does not pass and the load data are the same, judging that retransmission is overtime or retransmission times are not carried out, if the cyclic redundancy check information of the two paths of accumulated Bluetooth receiving branches is correct, selecting the load data of the path of Bluetooth receiving branches with the maximum received signal strength and the correct cyclic redundancy check information as output data to be delivered to a Bluetooth protocol processor for processing, and stopping retransmission.
When the cyclic redundancy check information of the two paths of the Bluetooth receiving branches do not pass and the load data are the same, judging that retransmission is overtime or retransmission times are not carried out, if more than three paths of the cyclic redundancy check information are correct, selecting the result of 1/3 decoding of the load data of the three paths of the Bluetooth receiving branches with the maximum received signal strength and the correct cyclic redundancy check information as output data, and delivering the output data to a Bluetooth protocol processor for processing, and stopping retransmission.
The working principle of 1/3 decoding is as follows: the comparison of the three bits at the same position selects 2 or 3 identical bits as the correct result.
Example 3
The embodiment of the invention provides electronic equipment, which comprises the Bluetooth multichannel receiving system disclosed in the embodiment 2 of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. A bluetooth multichannel reception method, the method comprising:
receiving cyclic redundancy check information and load data of each Bluetooth receiving branch in the multipath Bluetooth receiving branches;
in one mode, when the cyclic redundancy check information in at least one Bluetooth receiving branch is correct, determining not to retransmit;
screening output data from the load data which is not retransmitted;
in the above mode, when the cyclic redundancy check information in each path of bluetooth receiving branch is incorrect and the retransmission time exceeds the preset retransmission time, or when the cyclic redundancy check information in each path of bluetooth receiving branch is incorrect and the remaining retransmission times are less than or equal to the preset retransmission times, determining to not retransmit.
2. The method according to claim 1, characterized in that it further comprises:
in the one mode, when the cyclic redundancy check information in each path of bluetooth receiving branch is incorrect and the retransmission time does not exceed the preset retransmission time, or when the cyclic redundancy check information in each path of bluetooth receiving branch is incorrect and the residual retransmission times are greater than the preset retransmission times, determining retransmission.
3. The method according to claim 1, characterized in that it further comprises:
in the one mode, the output data is screened from the load data which is not retransmitted, and the method specifically comprises the following steps:
when the cyclic redundancy check information in one Bluetooth receiving branch is correct, taking the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information as output data;
when the cyclic redundancy check information in each path of Bluetooth receiving branch is correct and the load data in at least two paths of Bluetooth receiving branches with the correct cyclic redundancy check information are the same, taking the same load data as output data;
and when the cyclic redundancy check information in each Bluetooth receiving branch is correct and the load data in the Bluetooth receiving branch with the correct cyclic redundancy check information are different, taking the load data in the Bluetooth receiving branch with the largest received signal strength in the Bluetooth receiving branch with the correct cyclic redundancy check information as output data.
4. The method according to claim 1, characterized in that it further comprises:
in another mode, when the cyclic redundancy check information in at least two paths of Bluetooth receiving branches is correct and the load data in at least two paths of Bluetooth receiving branches are the same, determining not to retransmit.
5. The method according to claim 4, further comprising:
in the other mode, when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time, or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the residual retransmission times are smaller than or equal to the preset retransmission times, determining to not retransmit.
6. The method according to claim 4, further comprising:
in the other mode, when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time does not exceed the preset retransmission time, or when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the residual retransmission times are larger than the preset retransmission times, determining to retransmit the load data, and reserving the first load data in the Bluetooth receiving branch with the correct cyclic redundancy check information until a second load data identical to the first load data appears after retransmission, and sending a retransmission stopping request, wherein the second load data is the load data identical to the first load data in other Bluetooth receiving branches with the correct cyclic redundancy check information appearing after retransmission.
7. The method according to claim 4, further comprising:
and in the other mode, screening output data from the load data which is not retransmitted, wherein the method specifically comprises the following steps of:
when the cyclic redundancy check information in at least two paths of Bluetooth receiving branches is correct and the load data in the at least two paths of Bluetooth receiving branches are the same, taking the same load data as output data;
when the cyclic redundancy check information in at least one path of Bluetooth receiving branch is correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in at least one path of Bluetooth receiving branch is judged to be correct and the residual retransmission times are smaller than or equal to the preset retransmission times, if only the cyclic redundancy check information in one path of Bluetooth receiving branch is correct, load data in the Bluetooth receiving branch with the correct cyclic redundancy check information is used as output data;
when the cyclic redundancy check information in the two paths of Bluetooth receiving branches is correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in the two paths of Bluetooth receiving branches is correct and the residual retransmission times are less than or equal to the preset retransmission times, if the load data in the two paths of Bluetooth receiving branches are different, the load data in the Bluetooth receiving branches with high received signal strength are selected as output data;
when the cyclic redundancy check information in more than two paths of Bluetooth receiving branches is correct and the retransmission time exceeds the preset retransmission time, or the cyclic redundancy check information in more than two paths of Bluetooth receiving branches is correct and the residual retransmission times are smaller than or equal to the preset retransmission times, if the load data in the more than two paths of Bluetooth receiving branches are different, the load data in the three paths of Bluetooth receiving branches with the highest received signal strength are selected as output data, wherein the load data in the three paths of Bluetooth receiving branches with the highest received signal strength are 1/3 decoded.
8. A bluetooth multichannel receiving system, characterized in that the system comprises a plurality of bluetooth receiving branches and a retransmission processor, wherein the bluetooth receiving branches comprise a receiving antenna, a radio frequency receiver and a baseband processor;
the receiving antenna is used for receiving external wireless signals;
the radio frequency receiver is used for converting the wireless signal into a baseband signal;
the baseband processor is used for resolving cyclic redundancy check information and load data from the baseband signal;
the retransmission processor configured to perform the steps of the method according to any one of claims 1 to 7.
9. An electronic device comprising the bluetooth multichannel reception system according to claim 8.
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2018
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112566081A (en) | 2021-03-26 |
| CN108430055A (en) | 2018-08-21 |
| CN108430055B (en) | 2021-01-19 |
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