Method and entity for transmitting in a communications system

• US 10,375,732 B2
• Filed: 07/22/2015
• Issued: 08/06/2019
• Est. Priority Date: 07/22/2015
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Mestanov, Filip, Soder, Johan, Tayamon, Soma, Wang, Yu, Wikstrom, Gustav
• Primary Examiner(s): Taha, Shukri
• Application Number:
  US15/746,722
• Publication Number:
  US 20180220460A1
• Time in Patent Office: 1,476 Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/566 of the information or information source or recipient
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

The disclosure relates to a method (50) performed in an entity (11, 12) for transmitting in a communications system (10). The method (50) comprises assessing (51) a channel to be available for transmission by establishing an on-going transmission to have a received signal strength such as to allow simultaneous 5 transmission in view of a first clear channel assessment threshold; establishing (52) type of transmission of the on-going transmission; and determining (53), based on the established type of transmission, whether to transmit or to defer transmitting. A corresponding entity (11, 12), computer programs and computer program products are also provided. 10

Claims

1. A method performed in an entity for transmitting in a communications system, the method comprising:

assessing a channel to be available for transmission by establishing an on-going transmission to have a received signal strength such as to allow simultaneous transmission in view of a first clear channel assessment threshold;

establishing type of transmission of the on-going transmission; and

determining, based on the established type of transmission, whether to transmit or to defer transmitting.

2. The method of claim 1, wherein the determining comprises determining to defer transmitting when the type of transmission comprises a first type and else determining to transmit simultaneously.

3. The method of claim 1, wherein the determining is further based on a second clear channel assessment threshold.

4. The method of claim 3, wherein the establishing comprises establishing that the on-going transmission is of a first type, and wherein the determining comprises determining to transmit simultaneously when the on-going transmission has a received signal strength such as to allow simultaneous transmission in view of the second clear channel assessment threshold.

5. The method of claim 2, wherein the first type of transmission comprises one or more of:

a transmission addressed to two or more recipients, a transmission carrying information classified as important, a transmission comprising a request-to-send message, a transmission comprising a clear-to-send message, a multi-user multiple input multiple output transmission, an orthogonal frequency division multiple access transmission, a beacon frame, a control frame, a trigger frame preceding a first type of transmission.

6. The method of claim 1, wherein the establishing type of transmission comprises one of:

decoding a medium access control (MAC) header and establishing type of transmission based on information in the MAC header; and

decoding a physical layer (PHY) header and establishing type of transmission based on information in the PHY header.

7. The method of claim 1, wherein the establishing type of transmission comprises decoding a trigger frame preceding a first type of transmission and establishing type of transmission based on the trigger frame.

8. The method of claim 1, wherein the assessing comprises establishing the first clear channel assessment threshold by a dynamic sensitivity threshold adjustment method.

9. A computer program product comprising a non-transitory computer readable medium storing a computer program for handling transmissions, the computer program comprising computer program code, which, when executed on at least one processor of an entity causes the entity to perform the method of claim 1.

10. An entity for transmitting in a communications system, the entity comprising:

a memory; and

a processor coupled to the memory, wherein the entity is configured to;

assess a channel to be available for transmission by establishing an on-going transmission to have a received signal strength such as to allow simultaneous transmission in view of a first clear channel assessment threshold,

establish type of transmission of the on-going transmission, and

determine, based on the established type of transmission, whether to transmit or to defer transmitting.

11. The entity of claim 10, wherein the entity is further configured to determine to defer transmitting as a result of determining that the type of transmission comprises a first type.

12. The entity of claim 10, wherein the entity is further configured to determine further based on a second clear channel assessment threshold.

13. The entity of claim 12, wherein the entity is further configured to establish by establishing that the on-going transmission is of a first type, and configured to determine to transmit simultaneously as a result of determining that the on-going transmission has a received signal strength such as to allow simultaneous transmission in view of the second clear channel assessment threshold.

14. The entity of claim 11, wherein the first type of transmission comprises one or more of:

a transmission addressed to two or more recipients, a transmission carrying information classified as important, a transmission comprising a request-to-send message, a transmission comprising a clear-to-send message, a multi-user multiple input multiple output transmission, an orthogonal frequency division multiple access transmission, a beacon frame, a control frame, a trigger frame preceding a first type of transmission.

15. The entity of claim 10, wherein the entity is further configured to establish type of transmission by performing a processing comprising one of:

decoding a medium access control (MAC) header and configured to establish type of transmission based on information in the MAC header; and

decoding a physical layer (PHY) header and establishing type of transmission based on information in the PHY header.

16. The entity of claim 10, wherein the entity is further configured to establish type of transmission by decoding a trigger frame preceding a first type of transmission and configured to establish type of transmission based on the trigger frame.

17. The entity of claim 10, wherein the entity is further configured to assess by establishing the first clear channel assessment threshold by a dynamic sensitivity threshold adjustment method.

18. A method for transmitting in a communications system, the method comprising:

storing in a transmit buffer a frame to be transmitted over a channel;

after storing the frame in the transmit buffer and before transmitting the frame over the channel, detecting a transmission on the channel and determining a type associated with the detected transmission;

determining that the determined type matches a particular transmission type; and

based at least in part on the determined type, delaying transmission of the frame regardless of whether or not the signal strength of the detected transmission is less than a first clear channel assessment threshold.

19. The method of claim 18, further comprising determining that the signal strength of the detected transmission is greater than a second clear channel assessment threshold that is different than the first clear channel assessment threshold, wherein

the delaying step is performed as a result of determining that the determined type matches a particular transmission type and determining that the signal strength of the detected transmission is greater than the second clear channel assessment threshold.