# US 10,321,453 B2 · System and method for allocating periodic resources

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- Number: US 10,321,453 B2
- Document ID: US10321453B2
- Status: Granted
- Kind: B2
- Application number: 13/925,365
- Filed: 2013-06-24
- Published: 2013-12-26
- Granted: 2019-06-11
- Earliest claimed: 2012-06-26
- Assignees: Futurewei Technologies, Inc.
- Applicants: FutureWei Technologies, Inc.
- Inventors: Young Hoon Kwon; Yunsong Yang; Zhigang Rong
- Web page: https://patentgrep.com/patent/US10321453B2

## CPC

- H04W 72/27: between access points
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 52/0219: {where the power saving management affects multiple terminals}
- H04W 74/04: Scheduled access (hybrid access H04W74/02)
- H04W 74/006: {in the downlink, i.e. towards the terminal}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A method for operating an access point includes broadcasting reservation information for a periodic group resource, assigning a resource in the periodic resource to a first station and transmitting information about the resource in the periodic group resource allocated to the first station to the first station, wherein the transmitting occurs during one of an association procedure with the first station and a reconfiguration of a resource assignment for the first station. The method also includes exchanging data with the first station during the resource in the periodic group resource allocated to the first station.

## Claims

### Claim 1

A method implemented by an access point, the method comprising:
broadcasting, by the access point, a beacon frame comprising a periodic restricted access window (PRAW) allocation message, each instance of the PRAW being an interval for accessing a channel by one or more stations, wherein the PRAW allocation message indicates a message type of the PRAW allocation message, and wherein the PRAW allocation message further indicates a period of the PRAW as an integer multiple of a short beacon interval;
transmitting, by the access point, an association response frame to a first station that includes information about a time slot of the PRAW that is assigned to the first station; and
transmitting or receiving, by the access point, data to or from the first station during the assigned time slot of the PRAW.

### Claim 2 (depends on 1)

The method of claim 1, wherein the PRAW allocation message further indicates a duration of the PRAW and a time to a first time slot of the one or more time slots of the PRAW.

### Claim 3 (depends on 1)

The method of claim 1, wherein the information about the time slot in the association response frame includes a start time of the time slot, a duration of the time slot, and a period of the time slot.

### Claim 4 (depends on 1)

The method of claim 1, wherein the PRAW allocation message further indicates allowed stations permitted to exchange data during the PRAW.

### Claim 5 (depends on 1)

The method of claim 1, wherein the PRAW allocation message is transmitted less frequently than every beacon frame.

### Claim 6 (depends on 1)

The method of claim 1, wherein the time slot of the one or more time slots of the PRAW is allocated to a group of stations, wherein the group of stations includes the first station.

### Claim 7

A method implemented by a station, the method comprising:
receiving, by the station, a beacon frame comprising a periodic restricted access window (PRAW) allocation message, each instance of the PRAW being an interval for accessing a channel by one or more stations, wherein the PRAW allocation message indicates a message type of the PRAW allocation message, and wherein the PRAW allocation message further indicates a period of the PRAW as an integer multiple of a short beacon interval; and
transmitting or receiving, by the station, data to or from an access point during a time slot of the PRAW upon determining that the station is in a list of allowed stations permitted to utilize the PRAW.

### Claim 8 (depends on 7)

The method of claim 7, wherein the PRAW allocation message includes information about a duration of the PRAW and a time to a first time slot of one or more time slots of a PRAW.

### Claim 9 (depends on 7)

The method of claim 7, wherein the PRAW allocation message further includes a number of time slots in the PRAW and durations of the time slots of the PRAW.

### Claim 10 (depends on 7)

The method of claim 7, wherein the PRAW allocation message further indicates allowed long sleep stations permitted to exchange data during the PRAW.

### Claim 11 (depends on 7)

The method of claim 7, wherein a list of allowed stations is transmitted in a short beacon frame.

### Claim 12 (depends on 7)

The method of claim 7, wherein the PRAW allocation message is received at a greater period than a period of the list of allowed stations.

### Claim 13

An access point comprising:
a memory storage comprising instructions; and
one or more processors in communication with the memory, wherein the one or more processors execute the instructions to:
broadcast a beacon frame comprising a periodic restricted access window (PRAW) allocation message, each instance of the PRAW being an interval for accessing a channel by one or more stations, wherein the PRAW allocation message indicates a message type of the PRAW allocation message, and wherein the PRAW allocation message further indicates a period of the PRAW as an integer multiple of a short beacon interval; and
transmit an association response frame to a first station that includes information about a time slot of the PRAW that is assigned to the first station; and
transmit or receive data to or from the first station during the assigned time slot of the PRAW.

### Claim 14 (depends on 13)

The access point of claim 13, wherein the PRAW allocation message further indicates a duration of the PRAW and a time to a first time slot of the one or more time slots of the PRAW.

### Claim 15 (depends on 13)

The access point of claim 13, wherein the information about the time slot of the PRAW in the association response frame includes a start time of the time slot of the PRAW, a duration of the time slot of the PRAW, and a period of the time slot of the PRAW.

### Claim 16 (depends on 13)

The access point of claim 13, wherein the one or more processors execute the instructions to transmit the PRAW allocation message with the information about the assigned time slot to the first station.

### Claim 17

A station comprising:
a memory storage comprising instructions; and
one or more processors in communication with the memory, wherein the one or more processors execute the instructions to:
receive a beacon frame comprising a periodic restricted access window (PRAW) allocation message, each instance of the PRAW being an interval for accessing a channel by one or more stations, wherein the PRAW allocation message indicates a message type of the PRAW allocation message, and wherein the PRAW allocation message further indicates a period of the PRAW as an integer multiple of a short beacon interval; and
transmit or receive data to or from an access point during a time slot of the PRAW upon determining that the station is in a list of allowed stations permitted to utilize the PRAW.

### Claim 18 (depends on 17)

The station of claim 17, wherein the PRAW allocation message further indicates a duration of the PRAW and a time to a first time slot of one or more time slots of a PRAW of the PRAW.

### Claim 19 (depends on 17)

The station of claim 17, wherein the PRAW allocation message further includes a number of time slots of the PRAW and durations of the time slots of the PRAW.

### Claim 20 (depends on 17)

The station of claim 17, wherein the PRAW allocation message further includes a first indicator of allowed long sleep stations permitted to exchange data during the PRAW.

### Claim 21 (depends on 17)

The station of claim 17, wherein the station is a regular station.

### Claim 22

A method implemented by an access point in an Institute of Electrical and Electronics Engineers (IEEE) 802.11 compliant communications system, the method comprising:
periodically broadcasting, by the access point, a Beacon frame comprising a periodic restricted access window (PRAW) allocation message, each instance of the PRAW being an interval for accessing a channel by one or more stations, wherein the PRAW allocation message indicates a message type of the PRAW allocation message, and wherein the PRAW allocation message further indicates a period of the PRAW as an integer multiple of a short beacon interval;
transmitting, by the access point, a management frame to a first station, the management frame including information about a time slot of the PRAW that is assigned to the first station; and
transmitting or receiving, by the access point, data to or from the first station during the assigned time slot of the PRAW.

### Claim 23 (depends on 22)

The method of claim 22, wherein the management frame is an association response frame.

### Claim 24 (depends on 22)

The method of claim 22, wherein the PRAW allocation message includes at least one of a group identifier of the PRAW, a start time of the PRAW, a duration of the PRAW, or a start offset of the PRAW.

### Claim 25 (depends on 22)

The method of claim 22, wherein the first station is a long sleep station.