Method for implementing dimming, and dimming apparatus

• US 9,509,403 B2
• Filed: 09/18/2013
• Issued: 11/29/2016
• Est. Priority Date: 06/27/2013
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Lv, Ning, Zhi, Zhou, Yu, Zhong
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): Kaiser, Syed M
• Application Number:
  US14/901,086
• Publication Number:
  US 20160142137A1
• Time in Patent Office: 1,168 Days
• Field of Search: 315/307
• US Class Current: 1/1
• CPC Class Codes: G08C 23/04 using light waves, e.g. infrared
• CPC Class Codes: H04B 10/116 Visible light communication
• CPC Class Codes: H04L 12/282 based on user interaction within the home receiver circuitry for displaying additional information being controlled by a remote control apparatus H04N21/42204
• CPC Class Codes: H04Q 11/0003 Details
• CPC Class Codes: H05B 47/10 Controlling the light source
• CPC Class Codes: H05B 47/195 the transmission using visible or infrared light

Abstract

A method and apparatus for implementing dimming are disclosed. The method includes: at an MAC layer, dividing an MSDU into two or more sub-MSDUs with a same length; encapsulating each sub-MSDU obtained after dividing into a separate MPDU, and generating a compensation frame for each MPDU; and aggregating the MPDUs and the compensation frames with the same addresses into a PSDU part of a PPDU and transmitting a physical frame.

Claims

1. A method for implementing dimming, comprising:

dividing a media access control (MAC) service data unit (MSDU) into two or more sub-MSDUs with a same length;

encapsulating each sub-MSDU obtained after dividing into a separate MAC protocol data unit (MPDU), and generating a compensation frame (CF) used for adjusting a brightness of a light source in a data transmission process for each MPDU; and

aggregating the MPDUs and the CFs with same addresses into a physical service data unit (PSDU) part of a physical protocol data unit (PPDU) and transmitting a physical frame.

2. The method according to claim 1, further comprising:

judging that an address of the MSDU is a unicast address.

3. The method according to claim 2, wherein,

the CF of the each MPDU and the MPDU in which the CF is located have a same target address.

4. The method according to claim 3, wherein,

a proportional relation between the each MPDU and the CF corresponding to the each MPDU in a PSDU satisfies the following formula:

5. The method according to claim 1, wherein,

there is a one-to-one correspondence between the MPDU and the CF corresponding to the MPDU.

6. The method according to claim 5, wherein,

the brightness variation of the light source after the dimming is less than a brightness variation that can be sensed by human eyes.

7. The method according to claim 5, wherein,

when the CF is used for brightening, a value of a data part of the CF is an all-1-sequence.

8. The method according to claim 7, wherein,

lengths of the all 1 sequences are different, and different lengths correspond to different brightening degrees.

9. A dimming apparatus, comprising:

a processing module, a storage module and an optical driver transmission module, wherein,

the storage module is configured to;

save dimming information with different lengths used for adjusting a brightness of a light source;

the processing module is configured to;

divide a received media access control MAC service data unit (MSDU) into two or more sub-MSDUs with a same length;

encapsulate each sub-MSDU obtained after dividing into a separate MAC protocol data unit (MPDU), and generate a compensation frame (CF) for each MPDU; and

aggregate the MPDUs and the CFs with same addresses into a physical service data unit (PSDU) part of a physical protocol data unit (PPDU) to transmit to the optical driver transmission module; and

the optical driver transmission module is configured to;

implement data transmission, light source brightness adjustment and lighting;

wherein, dimming information in the CF is read from the storage module.

10. The dimming apparatus according to claim 9, wherein,

the dimming information is all-1-sequences with different lengths.

11. The dimming apparatus according to claim 9, wherein,

the dimming apparatus is configured in a sending end of a visible light communication system, or is separately configured at a sending side of a visible light system.

12. The dimming apparatus according to claim 10, wherein,

the dimming apparatus is configured in a sending end of a visible light communication system, or is separately configured at a sending side of a visible light system.