System and method for wireless communication

• US 9,451,541 B2
• Filed: 01/11/2012
• Issued: 09/20/2016
• Est. Priority Date: 01/11/2012
• Status: Active Grant

• Current Assignee: Shenzhen HAC Telecom Technology Company Limited
• Original Assignee: Shenzhen HAC Telecom Technology Company Limited
• Inventors: Lei, Zhaojun
• Primary Examiner(s): Sinkantarakorn, Pao
• Assistant Examiner(s): Phillips, Michael
• Application Number:
  US14/113,580
• Publication Number:
  US 20140044032A1
• Time in Patent Office: 1,714 Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/15 Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes H03M13/17 takes precedence
• CPC Class Codes: H04W 52/0203 in the radio access network or backbone network of wireless communication networks
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and system for wireless communication are disclosed. The method comprises: the master device generates a sequence code through a specific encoder and transmits the sequence code to each slave device continuously within a preset period according to the communication demand, wherein the specific encoder is a feedback shift register constructed by a specific polynomial, of which the coefficients and the order are in correlation with the communication demand while all of the coefficients and initial values are not equal to 0 at the same time; the preset period is greater than or equal to the sum of a sleeping period and a detecting period of the slave device, which constitutes a sleeping-and-waking cycle; the slave device receives a continuous section of the sequence code in the detecting period, decodes the sequence code through a decoder corresponding to the encoder, and performs corresponding operation according to the decoding result.

Claims

1. A method for wireless communication used to transmit a message to a specific slave device when a master device demands communication, wherein comprising:

S1, the master device generating a sequence code through a specific encoder and transmitting the sequence code to each slave device continuously within a preset period according to the communication demand, wherein the specific encoder is a specific feedback shift register constructed by a specific polynomial, of which the coefficients and the order are in correlation with the communication demand, while all of the coefficients and initial values are not equal to 0;

the preset period is greater than or equal to the sum of a sleeping period and a detecting period of the slave device, which constitutes a sleeping-and-waking cycle;

S2, the specific slave device receiving a continuous section of the sequence code in the detecting period, decoding the continuous section of the sequence code through a decoder corresponding to the specific encoder, and performing corresponding operation according to the decoding result;

wherein after the specific slave device has decoded the continuous section of the sequence code through the decoder constructed by the specific feedback shift register, removing a same number of code elements as that of the order from received sequence code, and initializing the specific feedback shift register of the specific slave device with the initial value equal to that of the specific feedback shift register of the master device, then calculating a time when the master device starts transmitting the sequence code according to a baud rate of current communication, and synchronizing in time with the master device based on calculated time and/or calculating a time when the master device stops transmitting the sequence code within the preset period, wherein the specific slave device goes to sleep before the time that has been calculated to stop transmitting the sequence code.

2. The method for wireless communication of claim 1, wherein, the sequence code generated by the specific encoder is in the form of m-sequence and each slave device comprises the decoder corresponding to the specific encoder when the communication demand is to wake up all the slave devices through broadcasting.

3. The method for wireless communication of claim 1, wherein, the coefficients of the specific polynomial are the combination of a binary group number of a specific group of slave devices and a preset first fixed sequence while each slave device in the specific group comprises the decoder corresponding to the specific encoder when the communication demand is to wake up the slave devices in the specific group.

4. The method for wireless communication of claim 1, wherein, the coefficients of the specific polynomial are at least part of a binary ID number of the specific slave device or the combination of at least part of a binary ID number of the specific slave device and a preset second fixed sequence while the specific slave device comprise the decoder corresponding to the specific encoder when the communication demand is to wake up the specific slave device individually.

5. The method for wireless communication of claim 1, wherein, the coefficients of the specific polynomial are the combination of at least part of a binary ID number of the specific slave device and a binary sequence corresponding to a control instruction while the specific slave device comprises the decoder corresponding to the specific encoder when the communication demand is to transmit the control instruction to the specific slave device.

6. The method for wireless communication of claim 5, wherein, the coefficients of the specific polynomial are the combination of at least part of the binary ID number of the specific slave device and a binary sequence corresponding to a preset opening-valve or closing-valve instruction while the specific slave device comprises the decoder corresponding to the specific encoder when the communication demand is to transmit the opening-valve or closing-valve instruction to the specific slave device, wherein the opening-valve instruction and the closing-valve instruction correspond to different binary sequences, respectively.

7. The method for wireless communication of claim 2, wherein, when the specific slave device comprises at least two decoders, the specific slave device decodes the sequence code through the at least two decoders sequentially by adoption of heuristic method after receiving the sequence code, and performs the corresponding operation according to the decoding result.

8. The method for wireless communication of claim 3, wherein, when the specific slave device comprises at least two decoders, the specific slave device decodes the sequence code through the at least two decoders sequentially by adoption of heuristic method after receiving the sequence code, and performs the corresponding operation according to the decoding result.

9. The method for wireless communication of claim 4, wherein, when the specific slave device comprises at least two decoders, the specific slave device decodes the sequence code through the at least two decoders sequentially by adoption of heuristic method after receiving the sequence code, and performs the corresponding operation according to the decoding result.

10. The method for wireless communication of claim 5, wherein, when the specific slave device comprises at least two decoders, the specific slave device decodes the sequence code through the at least two decoders sequentially by adoption of heuristic method after receiving the sequence code, and performs the corresponding operation according to the decoding result.

11. The method for wireless communication of claim 6, wherein, when the specific slave device comprises at least two decoders, the specific slave device decodes the sequence code through the at least two decoders sequentially by adoption of heuristic method after receiving the sequence code, and performs the corresponding operation according to the decoding result.

12. The method for wireless communication of claim 1, wherein, in the step S1, encoding the logic 0 or 1 of the sequence code by means of Manchester encoding method, non-return-to-zero encoding method or return-to-zero encoding method after the sequence code is generated, and then transmitting the encoded sequence code by means of Manchester encoding method, non-return-to-zero encoding method or return-to-zero encoding method continuously to each slave device within the preset period.

13. The method for wireless communication of claim 1, wherein,

the specific slave device performing the corresponding operation according to the decoding result in step S2 comprises:

counting the number of continuous 0 in the output after decoding;

judging whether the number of the continuous 0 in the output exceeds a preset limit, and performing corresponding operation according to the order and coefficients of the polynomial of the decoder that has been used;

or

if the master device has reversed the generated sequence code, the specific slave device performing the corresponding operation according to the decoding result in step S2 comprises;

counting the number of continuous 1 in the output after decoding;

judging whether the number of the continuous 1 in the output exceeds a preset limit, and performing corresponding operation according to the order and coefficients of the polynomial of the decoder that has been used.

14. The method for wireless communication of claim 1, wherein,

if the master device has scrambled or merged the generated sequence code, in the step S2, the specific slave device will descramble or de-merge first, decode subsequently and perform corresponding operation according to the decoding result.

15. A system for wireless communication, which comprises a master device and at least one slave device, and the master device is operable to transmit a message to a specific slave device when demanding communication, wherein, the master device comprises:

an encoding module operable to generate a sequence code through a specific encoder, wherein the specific encoder is a specific feedback shift register constructed by a specific polynomial, and the coefficients and the order of the specific polynomial are in correlation with the communication demand, while all of the coefficients and the initial value of the polynomial are not equal to 0;

a transmitting module operable to transmit the sequence code to each slave device of the at least one slave device continuously within a preset period, wherein the preset period is greater than or equal to the sum of a sleeping period and a detecting period of the each slave device, which constitutes a sleeping-and-waking cycle;

the each slave device comprises;

a receiving module operable to receive the sequence code in the detecting period;

a decoding module operable to decode the sequence code through a decoder corresponding to the specific encoder;

a controlling module operable to perform corresponding operation according to the decoding result;

wherein after the specific slave device has decoded a continuous section of the sequence code through the decoder constructed by the specific feedback shift register, removing a same number of code elements as that of the order from received sequence code, and initializing the specific feedback shift register of the specific slave device with the initial value equal to that of the specific feedback shift register of the master device, then calculating a time when the master device starts transmitting the sequence code according to a baud rate of current communication, and synchronizing in time with the master device based on calculated time and/or calculating a time when the master device stops transmitting the sequence code within the preset period, wherein the specific slave device goes to sleep before the time that has been calculated to stop transmitting the sequence code.