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CN-122028210-A - Method for transmitting and receiving data in wireless communication system and wireless communication terminal

CN122028210ACN 122028210 ACN122028210 ACN 122028210ACN-122028210-A

Abstract

The present invention relates to a method of transmitting and receiving data in a wireless communication system and a wireless communication terminal. A method of transmitting and receiving a PPDU in a wireless communication system is disclosed. The terminal receives a frame indicating transmission of a PPDU from an Access Point (AP) to one or more terminals, and transmits the PPDU based on an AID12 subfield included in the frame. At this time, when the PPDU transmitted by the frame indication is an Extremely High Throughput (EHT) PPDU, the value of the AID12 subfield is set to one value among a plurality of values other than at least one specific value used to allocate resources for uplink orthogonal frequency division multiple access (UORA) of at least one terminal supporting High Efficiency (HE).

Inventors

  • GAO JIANZHONG
  • SUN ZHOUHENG
  • JIN XIANGXIAN
  • Guo Zhensan

Assignees

  • 韦勒斯标准与技术协会公司

Dates

Publication Date
20260512
Application Date
20210713
Priority Date
20200713

Claims (18)

  1. 1. A terminal configured to operate in a wireless communication system, comprising: communication module, and A processor configured to control the communication module, Wherein the processor is configured to: receiving a trigger frame from an access point, AP, indicating uplink transmissions to one or more terminals, and In response to the trigger frame, transmitting a trigger-based physical layer protocol data unit, TB PPDU, Wherein the trigger frame includes a common information field and one or more user information fields for the one or more terminals, Wherein, based on a combination of i) the common information field, and ii) a user information field corresponding to the terminal among the one or more user information fields, it is recognized whether the type of the TB PPDU is a legacy type or a non-legacy type, and Wherein the common information field includes an uplink length field used to set a value of a length field included in the TB PPDU.
  2. 2. The terminal according to claim 1, Wherein when the type of the TB PPDU is indicated as the non-legacy type, the TB PPDU is an EHT TB PPDU, an Wherein, when the type of the TB PPDU is indicated as the legacy type, the TB PPDU is an HE TB PPDU.
  3. 3. The terminal according to claim 1, Wherein each of the one or more user information fields includes an association identifier 12 aid12 subfield used to identify a resource unit allocated to a corresponding terminal among the one or more terminals.
  4. 4. A terminal according to claim 3, Wherein, when the type of the TB PPDU is designated as the non-legacy type, the AID12 subfield is not set to one of AID values related to a resource unit for random access.
  5. 5. A terminal according to claim 3, Wherein, when the type of the TB PPDU is indicated as the non-legacy type, the AID12 subfield is set to one of a plurality of values different from at least one specific value, and Wherein when the type of the TB PPDU is indicated as the legacy type, the at least one specific value is used to indicate a resource for random access.
  6. 6. The terminal according to claim 5, Wherein the at least one particular value includes "0" and "2045".
  7. 7. A terminal according to claim 3, Wherein, when the type of the TB PPDU is the non-legacy type, the AID12 subfield is set within a first range, Wherein, when the type of the TB PPDU is the legacy type, the AID12 subfield is set in a second range, and Wherein the first range is included in the second range.
  8. 8. The terminal according to claim 1, Wherein the trigger frame includes a specific user information field, Wherein, when the type of the trigger frame is a multi-user block acknowledgement request MU-BAR, the specific user information field includes a trigger dependent user information field having a length of 4 octets, and Wherein the specific user information field does not include the trigger dependent user information field when the type of the trigger frame is a multicast GCR MU-BAR with retry.
  9. 9. The terminal according to claim 1, Wherein the value of the length field included in the TB PPDU is differently set depending on whether the type of the TB PPDU is the legacy type or the non-legacy type based on the value of the uplink length field included in the common information field.
  10. 10. A method for transmitting frames by a terminal configured to operate in a wireless communication system, the method comprising: Receiving a trigger frame from an access point AP indicating uplink transmissions to one or more terminals, and In response to the trigger frame, transmitting a trigger-based physical layer protocol data unit, TB PPDU, Wherein the trigger frame includes a common information field and one or more user information fields for the one or more terminals, Wherein, based on a combination of i) the common information field, and ii) a user information field corresponding to the terminal among the one or more user information fields, it is recognized whether the type of the TB PPDU is a legacy type or a non-legacy type, and Wherein the common information field includes an uplink length field used to set a value of a length field included in the TB PPDU.
  11. 11. The method according to claim 10, Wherein when the type of the TB PPDU is indicated as the non-legacy type, the TB PPDU is an EHT TB PPDU, an Wherein, when the type of the TB PPDU is indicated as the legacy type, the TB PPDU is an HE TB PPDU.
  12. 12. The method according to claim 10, Wherein each of the one or more user information fields includes an association identifier 12 aid12 subfield used to identify a resource unit allocated to a corresponding terminal among the one or more terminals.
  13. 13. The method according to claim 12, Wherein, when the type of the TB PPDU is designated as the non-legacy type, the AID12 subfield is not set to one of AID values related to a resource unit for random access.
  14. 14. The method according to claim 12, Wherein, when the type of the TB PPDU is indicated as the non-legacy type, the AID12 subfield is set to one of a plurality of values different from at least one specific value, and Wherein when the type of the TB PPDU is indicated as the legacy type, the at least one specific value is used to indicate a resource for random access.
  15. 15. The method according to claim 14, Wherein the at least one particular value includes "0" and "2045".
  16. 16. The method according to claim 12, Wherein, when the type of the TB PPDU is the non-legacy type, the AID12 subfield is set within a first range, Wherein, when the type of the TB PPDU is the legacy type, the AID12 subfield is set in a second range, and Wherein the first range is included in the second range.
  17. 17. The method according to claim 10, Wherein the trigger frame includes a specific user information field, Wherein, when the type of the trigger frame is a multi-user block acknowledgement request MU-BAR, the specific user information field includes a trigger dependent user information field having a length of 4 octets, and Wherein the specific user information field does not include the trigger dependent user information field when the type of the trigger frame is a multicast GCR MU-BAR with retry.
  18. 18. The method according to claim 10, Wherein the value of the length field included in the TB PPDU is differently set depending on whether the type of the TB PPDU is the legacy type or the non-legacy type based on the value of the uplink length field included in the common information field.

Description

Method for transmitting and receiving data in wireless communication system and wireless communication terminal The present application is a divisional application of patent application with international application number 202180060642.9 (international application number PCT/KR 2021/009004) filed on 1/13/2023, 7/13, and entitled "method of transmitting and receiving data in wireless communication system and wireless communication terminal". Technical Field The present invention relates to a wireless communication system, and more particularly, to a wireless communication method and a wireless communication terminal for effectively signaling uplink multi-user information in a wireless communication system. Background In recent years, as the supply of mobile devices expands, wireless local area network (WIRELESS LAN) technology capable of providing rapid wireless internet services to mobile devices has been paid attention to. Wireless LAN technology allows mobile devices, including smart phones, smart tablets, laptop computers, portable multimedia players, embedded devices, etc., to wirelessly access the internet in a home or company or special service providing area based on short-range wireless communication technology. Since the initial wireless LAN technology was supported using a frequency of 2.4GHz, the Institute of Electrical and Electronics Engineers (IEEE) 802.11 has commercialized or developed various technical standards. First, IEEE 802.11b supports a maximum communication speed of 11Mbps when using frequencies of the 2.4GHz band. Compared to the frequency of the significantly congested 2.4GHz band, the IEEE 802.11a commercialized after the IEEE 802.11b uses frequencies other than the 2.4GHz band but the 5GHz band to reduce the influence of interference, and increases the communication speed to a maximum of 54Mbps by using the OFDM technology. However, the disadvantage of IEEE 802.11a is that the communication distance is shorter than IEEE 802.11b. Further, similar to IEEE 802.11b, IEEE 802.11g uses a frequency of 2.4GHz band to achieve a communication speed of a maximum of 54Mbps and satisfies backward compatibility to be significantly focused, and further, is superior to IEEE 802.11a in terms of communication distance. Further, as a technical standard established to overcome a limitation of a communication speed pointed out as a vulnerability in a wireless LAN, IEEE 802.11n has been provided. IEEE 802.11n aims to increase the speed and reliability of the network and to extend the working distance of the wireless network. In more detail, IEEE 802.11n supports High Throughput (HT), in which a data processing speed is 540Mbps or more at maximum, and further, is based on a multiple input and multiple output (Multiple Inputs Multiple Outputs, MIMO) technology, in which a plurality of antennas are used at both sides of a transmitting unit and a receiving unit to minimize a transmission error and optimize a data speed. Furthermore, the standard can use a compilation scheme that sends multiple copies that are superimposed on each other in order to increase data reliability. With the supply of activated wireless LANs, and further, with the diversification of applications using wireless LANs, the demand for new wireless LAN systems supporting higher throughput (very high throughput (Very High Throughput, VHT)) than the data processing speed supported by IEEE 802.11n has been attracting attention. Among them, IEEE 802.11ac supports a wide bandwidth (80 to 160 MHz) in 5GHz frequency. The IEEE 802.11ac standard is defined only in the 5GHz band, but the original 11ac chipset supports operation even in the 2.4GHz band for backward compatibility with existing 2.4GHz band products. Theoretically, according to this standard, the wireless LAN speeds of a plurality of stations can be made to be a minimum of 1Gbps, and the maximum single link speed can be made to be a minimum of 500Mbps. This is achieved by expanding the concept of the wireless interface received by 802.11n, such as wider wireless frequency bandwidth (max 160 MHz), more MIMO spatial streams (max 8), multi-user MIMO, and high density modulation (max 256 QAM). In addition, as a scheme for transmitting data by using a 60GHz band instead of the existing 2.4GHz/5GHz, IEEE 802.11ad has been provided. IEEE 802.11ad is a transmission standard that provides a maximum speed of 7Gbps by using a beamforming technique, and is suitable for high bit rate moving image streams such as large-scale data or uncompressed HD video. However, since the 60GHz band is difficult to pass through an obstacle, it has a disadvantage in that the 60GHz band can be used only among devices in a close space. As wireless LAN standards after 802.11ac and 802.11ad, the IEEE 802.11ax (high-efficiency wireless LAN (HIGH EFFICIENCY WLAN, HEW)) standard for providing a high-efficiency and high-performance wireless LAN communication technology in a high-density environment where APs and termi