Protocol for voice and data priority virtual channels in a wireless local area networking system

• US 6,847,653 B1
• Filed: 04/19/2000
• Issued: 01/25/2005
• Est. Priority Date: 11/09/1999
• Status: Expired due to Fees

• Current Assignee: Altobridge Limited (Singapore Technologies Engineering Limited)
• Original Assignee: Interwave Communications International SA (Alvarion Limited)
• Inventors: Smiroldo, Michael
• Primary Examiner(s): Olms, Douglas
• Assistant Examiner(s): Pizarro, Ricardo M.
• Application Number:
  US09/552,286
• Time in Patent Office: 1,742 Days
• Field of Search: 370/462, 370/458, 370/459, 370/460, 370/461, 370/449, 370/455, 370/342, 370/343, 370/345, 370/346, 370/348, 370/322, 370/326, 370/468, 370/498, 370/431, 370/441, 370/442, 370/434
• US Class Current: 370/462
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/02 Hybrid access
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

The present invention is a communications protocol which provides for voice and data priority channels in order that both voice and data information have equal opportunity to transmit over a communications network. This is achieved by splitting the 25 millisecond FCC dwell time into two 12.5 millisecond halves, and dedicating one half to voice packets and the other half to data frames. In the voice priority channel, the frequency hopping interval is doubled. Additionally, both channels operate independently, each maintaining independent bidding, data transmission, acknowledgement and retransmission. Pad packets are used to insure voice channel connectivity.

Claims

1. In a communications network, a communications protocol having a data mode channel and a voice mode channel comprising:

having dwell time, and doubling frequency hopping interval in a voice mode priority channel;

independently operating bidding, data transmission, acknowledgment, and retransmission of the data mode and voice mode channels; and

inserting pad packets to promote voice mode channel connectivity.

5. The communications protocol of claim 1, wherein inserting said pad packets ensures voice mode channel connectivity.

2. In a two channel (voice/data) environment in which a fixed percentage of RF bandwidth is reserved for the data priority channel, a communications protocol comprising:

regulating the reserved data channel percentage via two independent poll lists;

creating voice dwells and data dwells to permit variable reserved percentages of the data channel; and

interleaving of data and voice dwells to promote fixed latency in the voice channel.

6. The communications protocol of claim 2, wherein inserting said pad packets ensures fixed latency in the voice channel.

7. The communications protocol of claim 2, wherein inserting said pad packets guarantees fixed latency in the voice channel.

3. A method to arbitrate channels of communications between a first device and at least one second device of a plurality of devices, comprising the steps of:

dividing dwell time into as many segments as there are desired communication channels;

dedicating each divided segment to the desired communication channel;

independently operating bidding, data transmission, acknowledgment, and retransmission of the communication channels; and

inserting pad packets to promote connectivity of the communication channels.

8. The method of claim 3, wherein inserting said pad packets ensures connectivity of the communication channels.

4. A method to arbitrate channels of communications between a first device and at least one second device of a plurality of second devices, comprising the steps of:

dividing dwell time and dedicating a first half of the divided dwell time as a voice channel and remaining half as a data channel;

doubling frequency hopping interval of the voice channel;

independently operating bidding, data transmission, acknowledgment, and retransmission of the communication channels; and

inserting pad packets to promote voice channel connectivity.

9. The method of claim 4, wherein inserting said pad packets ensures voice channel connectivity.