WIRELESS COMMUNICATION METHOD USING TRIGGER INFORMATION, AND WIRELESS COMMUNICATION TERMINAL

• US 20200136785A1
• Filed: 12/19/2019
• Published: 04/30/2020
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: SK Telecom Co., Ltd., WILUS Inc.
• Original Assignee: SK Telecom Co., Ltd., WILUS Inc.
• Inventors: SON, Juhyung, KWAK, Jinsam, KO, Geonjung
• Granted Patent: US 11,018,836 B2
• Time in Patent Office: 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

1-20. -20. (canceled)

21. 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;

generate a trigger MPDU including trigger information which triggers an uplink (UL) transmission of a 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, wherein the RU allocated to the wireless communication terminal is included in one or more RUs through which a PLCP Protocol Data Unit (PPDU) is to be transmitted,

transmit the PPDU including an Aggregate-MAC Protocol Data Unit (A-MPDU) comprising the trigger MPDU including the trigger information and one or more data MPDUs including data to the wireless communication terminal by using the transceiver, 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,

when the A-MPDU includes the plurality of trigger MPDUs, each of the plurality of trigger MPDUs includes the same trigger information.

22. The base wireless communication terminal of claim 21, 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.

23. The base wireless communication terminal of claim 21, wherein the processor is configured to insert the trigger information into a MAC header of the one or more data MPDUs.

24. The base wireless communication terminal of claim 21, 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, 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.

25. 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;

receive, from the base wireless communication terminal, a PLCP Protocol Data Unit (PPDU) including an Aggregate-MAC Protocol Data Unit (A-MPDU) which includes a trigger MPDU including trigger information and one or more data MPDUs including data 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, wherein the RU allocated to the wireless communication terminal is included in one or more RUs through which the PPDU is to be transmitted,

obtain the trigger MPDU from the A-MPDU, and

transmit ACK information indicating that the data is received to the base wireless communication terminal based on the information on the RU of the trigger information included in the obtained trigger MPDU,

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

when the A-MPDU includes the plurality of trigger MPDUs, each of the plurality of trigger MPDUs includes the same trigger information.

26. The wireless communication terminal of claim 25, 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.

27. The wireless communication terminal of claim 25, wherein the one or more data MPDUs include a MAC header including the trigger information.

28. The wireless communication terminal of claim 25, wherein the trigger information comprises information indicating one or more RUs 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.

29. The wireless communication terminal of claim 25, 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 the PPDU.

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

receiving, from the base wireless communication terminal, a PLCP Protocol Data Unit (PPDU) including an Aggregate-MAC Protocol Data Unit (A-MPDU) which includes a trigger MPDU including trigger information and one or more data MPDUs including data, 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, wherein the RU allocated to the wireless communication terminal is included in one or more RUs through which the PPDU is to be transmitted,

obtaining the trigger MPDU from the A-MPDU, and

transmitting ACK information indicating that the data is received to the base wireless communication terminal based on the information on the RU of the trigger information included in the obtained trigger MPDU,

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

when the A-MPDU includes the plurality of trigger MPDUs, each of the plurality of trigger MPDUs includes the same trigger information.

31. The method of claim 30, 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 MPDU 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.