Traffic specifications for polling requests of periodic sources
View Patent ↗An apparatus and method for informing a coordinator of the particular characteristics of a periodic traffic source are disclosed. A station that generates a periodic traffic stream encodes the temporal period and temporal offset of the traffic stream within a quality-of-service (QoS) traffic specification, and transmits the traffic specification with a poll request. The coordinator, upon receiving a polling request, processes the associated traffic specification and, via appropriate decoding logic, determines whether the requesting station generates periodic traffic, and if so, the temporal period and temporal offset of the traffic stream. The coordinator subsequently can establish, based on the temporal period and temporal offset, a polling schedule that minimizes the delay between (i) the station generating a frame, and (ii) the station transmitting the frame (and thus the destination receiving the frame).
1. A computer implemented method comprising:
populating, by a computer, a first field of a traffic specification with a function of one of a temporal period and a temporal offset, wherein said temporal period and said temporal offset are for a plurality of expected future transmissions;
populating a second field of said traffic specification with the value of said first field, wherein said first field is a Minimum Service Interval field and said second field is a Maximum Service Interval field, wherein said Minimum Service Interval field is populated with a larger value than said Maximum Service Interval field; and
transmitting a polling request with said traffic specification.
2. The method of claim 1 wherein said first field and said second field are defined in an IEEE 802.11 specification.
3. The method of claim 1 wherein said transmitting is via a shared-communications channel, and wherein said temporal offset is relative to an IEEE 802.11 beacon.
4. The method of claim 1 further comprising:
generating a frame in accordance with said temporal period and said temporal offset; receiving a poll; and
transmitting said frame in response to said poll.
5. A method comprising:
populating, by a computer, a first field of a traffic specification with a first function of at least one of a temporal period and a temporal offset, wherein said temporal period and said temporal offset are for a plurality of expected future transmissions;
populating a second field of said traffic specification with a second function of at least one of said temporal period and said temporal offset, wherein said first field is a Minimum Service Interval field and said second field is a Maximum Service Interval field, wherein said Minimum Service Interval field is populated with a larger value than said Maximum Service Interval field; and
transmitting a polling request with said traffic specification.
6. The method of claim 5 wherein said first field and said second field are defined in an IEEE 802.11 specification.
7. The method of claim 5 further comprising:
generating a frame in accordance with said temporal period and said temporal offset;
receiving a poll; and
transmitting said frame in response to said poll.
8. A method comprising:
receiving, by a computer, a polling request and a traffic specification that specifies a first field and a second field, wherein said first field is a Minimum Service Interval field and said second field is a Maximum Service Interval field, wherein said Minimum Service Interval field has a larger value than said Maximum Service Interval field; and
determining one of a temporal period and a temporal offset from said first field.
9. The method of claim 8 wherein said first field and said second field are defined in an IEEE 802.11 specification.
10. The method of claim 8 wherein said receiving is via a shared-communications channel, and wherein said temporal offset is relative to an IEEE 802.11 beacon.
11. A method comprising:
receiving, by a computer, a polling request and a traffic specification that specifies a first field and a second field; and
determining a temporal period and a temporal offset from said first field and said second field, wherein said first field is a Minimum Service Interval field and said second field is a Maximum Service Interval field, wherein said Minimum Service Interval field has a larger value than said Maximum Service Interval field.
12. The method of claim 11 wherein said first field and said second field are defined in an IEEE 802.11 specification.
13. The method of claim 11 further comprising establishing a polling schedule based on said temporal period and said temporal offset.
14. The method of claim 13 further comprising transmitting a poll to the sender of said polling request in accordance with said polling schedule.