Operation method of coordinator and node supporting block ACK scheme and link adaptation for multi-rate transmission

Patent metadata

Field	Value
Publication number	US-9844092-B2
Application number	US-201514887703-A
Country	US
Kind code	B2
Filing date	Oct 20, 2015
Priority date	Oct 22, 2014
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

Provided is an operation method of a coordinator, the method including receiving a data packet from a node, configuring bitmap information indicating whether the data packet is received, and broadcasting a beacon packet including the bitmap information indicating whether the data packet is received.

First claim

What is claimed is:

1. An operation method of a coordinator, the method comprising:
receiving a data packet from a node;
configuring bitmap information indicating whether the data packet is received;
determining data modulation information from the data packet;
determining, based on the data modulation information, a determination result indicating whether to adjust either one or both of a transmission format indication (TFI) value of a guaranteed time slot (GTS) length of the node; and
broadcasting a beacon packet comprising the bitmap information and the determination result.

2. The method of claim 1 , wherein the configuring of the bitmap information comprises configuring, for the node, the bitmap information indicating whether the data packet is received in a GTS section.

3. The method of claim 2 , wherein the broadcasting of the beacon packet comprises broadcasting the beacon packet by including the bitmap information configured for the node in a beacon payload of the beacon packet.

4. The method of claim 3 , wherein the beacon payload of the beacon packet comprises at least one of a number of bitmap information, an address of the node, a bitmap of the node, and a TFI of the node.

5. The method of claim 4 , wherein the TFI of the node is used for the coordinator to control a link adaptation.

6. The method of claim 1 ,
wherein the data modulation information comprises a modulation method and a modulation rate of the data packet.

7. The method of claim 6 , wherein the determining of the data modulation information comprises determining the data modulation information based on channel state information of the data packet.

8. The method of claim 6 , further comprising:
setting the TFI value of the node comprised in a beacon payload of the beacon packet based on the determined data modulation information.

9. The method of claim 6 , further comprising:
calculating a number of guaranteed time slots (GTSs) allocated to the node based on the determined data modulation information.

10. The method of claim 6 , further comprising:
changing the GTS length based on the determined data modulation information.

11. The method of claim 10 , wherein the broadcasting of the beacon packet comprises broadcasting, to the node, the beacon packet comprising a GTS field including the changed GTS length and a GTS starting slot.

12. The method of claim 1 , further comprising:
receiving the data packet comprising a block acknowledgement (ACK) information field comprising a guaranteed time slot (GTS) change determined by the node and a changed GTS length.

13. The method of claim 12 , further comprising:
adjusting values of a GTS field based on information of the block ACK information field comprised in the data packet; and
broadcasting the adjusted values of the GTS field through a next beacon packet.

14. An operation method of a node, the method comprising:
determining data modulation information based on channel state information of a beacon packet received from a coordinator or bitmap information comprised in the beacon packet;
determining, based on the data modulation information or on the bitmap information, a determination result indicating whether to change a guaranteed time slot (GTS) length of the node;
configuring a media access control (MAC) payload comprising a block acknowledgement (ACK) information field, the ACK information field comprising a block ACK, the data modulation information, and the determination result; and
transmitting a data packet comprising the MAC payload to the coordinator.

15. The method of claim 14 , wherein the block ACK information field further comprises at least one of a block ACK sequence number, a GTS change in association with a data modulation, and the GTS length.

16. The method of claim 14 , further comprising:
setting a GTS change comprised in the block ACK information field of the data packet based on the determination result.

17. The method of claim 16 , further comprising:
changing a GTS length according to the GTS change.

18. The method of claim 17 , further comprising:
transmitting, to the coordinator, the data packet comprising the GTS change and the changed GTS length.

19. A non-transitory computer-readable storage medium comprising a program comprising instructions to cause a computer to perform the method of claim 1 .

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Tae Seok
• Hong Young Jun

Classifications

• H04L1/1614 Primary

  using bitmaps · CPC title

• H04W76/002

  Electricity · mapped topic

• H04L1/1621

  Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers · CPC title

• H04W4/008

  Electricity · mapped topic

• H04W48/00

  Access restriction (access security to prevent unauthorised access H04W12/08); Network selection; Access point selection · CPC title