Wireless communication method using trigger information, and wireless communication terminal

• US 10,554,370 B2
• Filed: 02/15/2018
• Issued: 02/04/2020
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: SK Telecom Co., Ltd., WILUS Inc.
• Original Assignee: WILUS Inc.
• Inventors: Son, Juhyung, Kwak, Jinsam, Ko, Geonjung
• Primary Examiner(s): Ahmed, Atique
• Application Number:
  US15/898,226
• Publication Number:
  US 20180175991A1
• Time in Patent Office: 719 Days
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1664 the supervisory signal being transmitted together with payload signals; piggybacking
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 65/40 Support for services or applications
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Provided is a wireless communication terminal that wirelessly communicates with a base wireless communication terminal. The wireless communication terminal includes: a transceiver; and a processor. The processor is configured to receive trigger information and data from the base wireless communication terminal by using the transceiver, and transmits ACK information indicating whether the data is received to the base wireless communication terminal based on the trigger information. The trigger information is information for triggering transmission of the wireless communication terminal.

Claims

1. A base wireless communication terminal that wirelessly communicates with a plurality of wireless communication terminal, the base wireless communication terminal comprising:

a transceiver; and

a processor,

wherein the processor is configured to

transmit an Aggregate-MAC Protocol Data Unit (A-MPDU) comprising a trigger MPDU including trigger information and one or more data MPDUs including data to a wireless communication terminal by using the transceiver, wherein the trigger information triggers an uplink (UL) transmission of the wireless communication terminal to the base wireless communication terminal and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal, and

receive ACK information indicating that the data is received, wherein the ACK information is transmitted from the wireless communication terminal based on the information on the RU,

wherein the A-MPDU is capable of including a plurality of trigger MPDUs including the trigger information.

2. The base wireless communication terminal of claim 1, wherein when the A-MPDU includes the plurality of trigger MPDUs, the processor is configured to transmit one of the plurality of the trigger MPDUs first among the plurality of the trigger MPDUs and one or more data MPDUs.

3. The base wireless communication terminal of claim 1, wherein when the A-MPDU includes the plurality of trigger MPDUs, each of the plurality of trigger MPDUs includes the same trigger information.

4. The base wireless communication terminal of claim 1, wherein the processor is configured to transmit a PLCP Protocol Data Unit (PPDU) including the A-MPDU to the wireless communication terminal and other wireless communication terminal, and

allocate, by using the trigger information, a frequency band to the wireless communication terminal, wherein the frequency band is included in a frequency band through which the PPDU is transmitted.

5. The base wireless communication terminal of claim 1, wherein the processor is configured to insert the trigger information into a MAC header of the one or more data MPDUs.

6. The base wireless communication terminal of claim 1, wherein the processor is configured to set an ACK policy of the one or more data MPDUs to be a value which indicates that an immediate response is needed,

transmit a PLCP Protocol Data Unit (PPDU) including the A-MPDU to the wireless communication terminal and other wireless communication terminal, and

receive the ACK information, within a predetermined time from a time point at the end of transmitting the PPDU, simultaneously with receiving ACK information from the other wireless communication terminal.

7. A wireless communication terminal that wirelessly communicates with a base wireless communication terminal, the wireless communication terminal comprising:

a transceiver; and

a processor,

wherein the processor is configured to

obtain trigger information from an Aggregate-MAC Protocol Data Unit (A-MPDU) when the wireless communication terminal receives the A-MPDU comprises a trigger MPDU including the trigger information and one or more data MPDUs including data from the base wireless communication terminal by using the transceiver, wherein the trigger information triggers an uplink (UL) transmission of the wireless communication terminal to the base wireless communication terminal and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal, and

transmits ACK information indicating that the data is received to the base wireless communication terminal based on the information on the RU,

wherein the A-MPDU is capable of including a plurality of trigger MPDUs including the trigger information.

8. The wireless communication terminal of claim 7, wherein when the A-MPDU includes the plurality of trigger MPDUs, one of the plurality of trigger MPDUs is the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs,

wherein the processor is configured to obtain the trigger information from the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs.

9. The wireless communication terminal of claim 7, wherein when the A-MPDU includes the plurality of trigger MPDUs, each of the plurality of trigger MPDUs includes the same trigger information.

10. The wireless communication terminal of claim 7, wherein a PLCP Protocol Data Unit (PPDU) including the A-MPDU is transmitted to the wireless communication terminal and other wireless communication terminal, and

wherein the processor is configured to transmit the ACK information through a frequency band which is included in a frequency band through which the PPDU is transmitted.

11. The wireless communication terminal of claim 7, wherein the one or more data MPDUs include a MAC header including the trigger information.

12. The wireless communication terminal of claim 7, wherein the trigger information comprises information indicating one or more Resource Unit (RU)s allocated to a random access,

wherein the processor is configured to obtain a counter value randomly within a predetermined range, and determine whether to perform a random access based on the counter value and the number of the one or more RUs allocated to the random access.

13. The wireless communication terminal of claim 7, wherein the processor is configured to transmit the ACK information, through a RU indicated by the information on the RU, within a predetermined time from a time point at the end of receiving a PLCP Protocol Data Unit (PPDU) including the A-MPDU.

14. A method of operating a wireless communication terminal that wirelessly communicates with a base wireless communication terminal, the method comprising:

obtaining trigger information from an Aggregate-MAC Protocol Data Unit (A-MPDU) when the wireless communication terminal receives the A-MPDU comprises a trigger MPDU including the trigger information and one or more data MPDUs including data from the base wireless communication terminal by using the transceiver, wherein the trigger information triggers an uplink (UL) transmission of the wireless communication terminal to the base wireless communication terminal and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal, and

transmitting ACK information indicating that the data is received to the base wireless communication terminal based on the information on the RU,

wherein the A-MPDU is capable of including a plurality of trigger MPDUs including the trigger information.

15. The method of claim 14, wherein when the A-MPDU includes the plurality of trigger MPDUs, one of the plurality of trigger MPDUs is the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs,

obtaining the trigger information from the A-MPDU comprises

obtaining the trigger information from the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs.

16. The method of claim 14, wherein when the A-MPDU includes the plurality of trigger MPDUs, each of the plurality of trigger MPDUs includes the same trigger information.

17. The method of claim 14, wherein a PLCP Protocol Data Unit (PPDU) including the A-MPDU is transmitted to the wireless communication terminal and other wireless communication terminal, and

wherein the transmitting the ACK information comprises

transmitting the ACK information through a frequency band which is included in a frequency band through which the PPDU is transmitted.