High-Speed Audio Data Transmission Method and Apparatus

Patent metadata

Field	Value
Publication number	US-2020374030-A1
Application number	US-202016992600-A
Country	US
Kind code	A1
Filing date	Aug 13, 2020
Priority date	Feb 14, 2018
Publication date	Nov 26, 2020
Grant date	—

Abstract

An audio data transmission method includes encapsulating, based on a physical layer frame header, a protocol data unit (PDU) including audio data, to obtain an audio data packet, where the physical layer frame header is modulated using a first digital modulation scheme, the PDU is modulated using a second digital modulation scheme, a value of a modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate, and a value of a modulation rate of the second digital modulation scheme is less than the value of the data transmission rate, and sending the audio data packet on a BLUETOOTH low energy (BLE) physical channel at the data transmission rate.

First claim

1 . An audio data transmission method, comprising:
encapsulating, based on a physical layer frame header, a protocol data unit (PDU) comprising audio data to obtain an audio data packet, wherein the physical layer frame header is modulated using a first digital modulation scheme, wherein a first modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate of audio data transmission, wherein the PDU is modulated using a second digital modulation scheme, wherein a second modulation rate of the second digital modulation scheme is less than the value of the data transmission rate; and sending the audio data packet on a BLUETOOTH Low Energy (BLE) physical channel at the data transmission rate.

2 . The audio data transmission method of claim 1 , further comprising:
generating a modulation scheme identifier of the BLE physical channel; based on the modulation scheme identifier, determining whether the physical layer frame header uses the first digital modulation scheme and determining whether the PDU uses the second digital modulation scheme; and sending the modulation scheme identifier.

3 . The audio data transmission method of claim 1 , wherein the data transmission rate is N times the value of the modulation rate of the second digital modulation scheme, and wherein N is an integer greater than 1.

4 . The audio data transmission method of claim 1 , wherein the PDU comprises a control layer frame header and a payload, wherein the payload carries the audio data, and wherein the control layer frame header comprises indication information that indicates a length of the audio data.

5 . The audio data transmission method of claim 1 , wherein a bandwidth of the BLE physical channel is 2 megahertz (MHz).

6 . The audio data transmission method of claim 1 , wherein the first digital modulation scheme comprises Gaussian frequency-shift keying (GFSK), and wherein the second digital modulation scheme comprises either differential quadrature phase-shift keying (DQPSK) or 8-differential phase-shift keying (8DPSK).

7 . The audio data transmission method of claim 6 , wherein a modulation factor of the GFSK ranges from 0.45 to 0.55.

8 . The audio data transmission method of claim 1 , further comprising:
querying a codec parameter using a logical link control and adaptation protocol (L2CAP), wherein the codec parameter comprises a coding parameter of the audio data; and encoding original audio data to obtain the audio data based on the coding parameter.

9 . An audio data transmission method, comprising:
receiving an audio data packet on a BLUETOOTH Low Energy (BLE) physical channel, wherein the audio data packet comprises a physical layer frame header and a protocol data unit (PDU); and demodulating the physical layer frame header using a first digital modulation scheme, wherein a first modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate of audio data transmission; and demodulating the PDU using a second digital modulation scheme to obtain audio data, wherein a second modulation rate of the second digital modulation scheme is less than the value of the data transmission rate.

10 . The audio data transmission method of claim 9 , further comprising:
receiving a modulation scheme identifier of the BLE physical channel; determining that the physical layer frame header uses the first digital modulation scheme based on the modulation scheme identifier; and determining that the PDU uses the second digital modulation scheme based on the modulation scheme identifier.

11 . The audio data transmission method of claim 9 , wherein the value of the data transmission rate is N times the value of the modulation rate of the second digital modulation scheme, and wherein N is an integer greater than 1.

12 . The audio data transmission method of claim 9 , wherein after obtaining the audio data, the audio data transmission method further comprises returning an acknowledgement message indicating a receiving status of the audio data.

13 . An audio data transmission apparatus, comprising:
a baseband processor configured to:
encapsulate, based on a physical layer frame header, a protocol data unit (PDU) comprising audio data, to obtain an audio data packet, wherein the physical layer frame header is modulated using a first digital modulation scheme, wherein a first modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate, wherein the PDU is modulated using a second digital modulation scheme, wherein a second modulation rate of the second digital modulation scheme is less than the value of the data transmission rate; and
a transmitter coupled to the baseband processor and configured to send the audio data packet on a BLUETOOTH Low Energy (BLE) physical channel at the data transmission rate.

14 . The apparatus of claim 13 , wherein the apparatus further comprises an audio codec coupled to the baseband processor and configured to generate a modulation scheme identifier of the BLE physical channel, wherein the baseband processor is further configured to:
based on the modulation scheme identifier, determine whether the physical layer frame header uses the first digital modulation scheme and determine whether the PDU uses the second digital modulation scheme, and wherein the transmitter is further configured to send the modulation scheme identifier.

15 . The apparatus of claim 13 , wherein the data transmission rate is N times the modulation rate of the second digital modulation scheme, and wherein N is an integer greater than 1.

16 . The apparatus of claim 13 , wherein the PDU comprises a control layer frame header and a payload, wherein the payload carries the audio data, and wherein the control layer frame header comprises indication information that indicates a length of the audio data.

17 . The apparatus of claim 13 , wherein a bandwidth of the BLE physical channel is 2 megahertz (MHz).

18 .- 20 . (canceled)

21 . The audio data transmission method of claim 1 , wherein a bandwidth of the BLE physical channel is 4 MHz, and wherein the bandwidth is based on a combination of two adjacent physical channels each having a bandwidth of 2 MHz.

22 . The apparatus of claim 13 , wherein a bandwidth of the BLE physical channel is 4 MHz, and wherein the bandwidth is based on a combination of two adjacent physical channels each having a bandwidth of 2 MHz.

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Huazhang
• Yu Zhan
• Chen Tong

Classifications

• H04W4/80

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• H04L2212/00

  Encapsulation of packets · CPC title

• H04L69/323

  in the physical layer [OSI layer 1] · CPC title

• H04L45/74

  Address processing for routing · CPC title

• H04L27/18

  Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) · CPC title