Method for wireless capability discovery and protocol negotiation, and wireless device including same

• US 7,519,393 B2
• Filed: 08/05/2005
• Issued: 04/14/2009
• Est. Priority Date: 05/01/2002
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bahl, Pradeep, Hassan, Amer
• Primary Examiner(s): Eisen; Alexander
• Assistant Examiner(s): CAI, WAYNE HUU
• Application Number:
  US11/197,802
• Publication Number:
  US 20060116148A1
• Time in Patent Office: 1,348 Days
• Field of Search: 455/507, 455/557, 455/517, 455/73, 348/143, 370/401, 370/310
• US Class Current: 455/557
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A protocol and method for establishing wireless data sessions between wireless clients, each of which support multiple wireless protocols is presented. A commonly supported wireless protocol is utilized to share the wireless protocols supported by the clients'"'"' circuitry. A wireless data session is then established based on the common capabilities of the wireless clients. Where multiple common protocols are supported, user preferences are utilized to determine which of the commonly supported protocols will be utilized for the wireless data session. Once a data session is established, the control channel may be idled periodically to conserve power. Alternatively, the protocol utilized in the wireless data session may be used to transmit control messages using the protocol of the present invention.

Claims

1. A method of establishing a wireless data session between a first wireless device capable of wireless communication via at least a first wireless protocol and a second wireless device capable of wireless communication via at least the first wireless protocol, comprising the steps of:

establishing a wireless control channel between the first and the second wireless devices using the first wireless protocol;

exchanging wireless capability information between the first and the second wireless devices via the wireless control channel to determine common wireless capabilities including at least two common wireless protocols activating a first profile stored on the first wireless device and a second profile stored on the second wireless device when establishing the wireless control channel, each respective profile comprising preference information indicating a connection priority for the at least two common wireless protocols;

negotiating a preferred wireless protocol based on the preference information, wherein negotiating comprises;

exchanging messages between the first wireless device and the second wireless device via the wireless control channel, the messages indicating the preference information for the respective wireless devices, and selecting the preferred wireless protocol as the one of the at least two common wireless protocols having a highest connection priority as indicated by the exchanged preference information; and

establishing a wireless data session utilizing the preferred wireless protocol between the first and the second wireless devices.

2. The method of claim 1, further comprising the step of dynamically changing the preferred wireless protocol utilized for the wireless data session.

3. The method of claim 2, wherein the step of dynamically changing the preferred wireless protocol comprises the steps of:

transmitting a control message on the wireless control channel via the first wireless protocol requesting a change in wireless protocol for the wireless data session to a different wireless protocol;

re-establishing the wireless data session using the different wireless protocol.

4. The method of claim 2, wherein the step of dynamically changing the preferred wireless protocol comprises the steps of:

transmitting a control message during the wireless data session requesting a change in wireless protocol to a different wireless protocol;

re-establishing the wireless data session using the different wireless protocol.

5. The method of claim 1, wherein the step of establishing a wireless control channel using the first wireless protocol, comprises the step of establishing a wireless control channel using IEEE 802.11b wireless protocol.

6. A method of establishing a wireless data session between a first and a second wireless device, each device supporting multiple wireless capabilities, comprising the steps of:

establishing wireless communication between the first and the second wireless devices;

exchanging information identifying each wireless devices'"'"' wireless capabilities;

determining common wireless capabilities including at least two common wireless protocols;

activating a first profile stored on the first wireless device and a second profile stored on the second wireless device when establishing wireless communication between the first and the second wireless devices, each respective profile comprising preference information indicating a connection priority for the at least two common wireless protocols;

negotiating a preferred wireless protocol based on the preference information, wherein negotiating comprises;

(A) exchanging messages between the first wireless device and the second wireless device, the messages including the preference information for the respective wireless devices; and

(B) selecting the preferred wireless protocol as the one of the at least two common wireless protocols having a highest connection priority as indicated by the exchanged preference information; and

utilizing the preferred wireless protocol in the wireless data session.

7. The method of claim 6, wherein the step of establishing wireless communication comprises the step of establishing wireless communication via IEEE 802.11b wireless protocol.

8. The method of claim 6, further comprising the steps of:

transmitting a request to change from the preferred wireless protocol used in the wireless data session to another common wireless protocol; and

re-establishing the wireless data session using the another common wireless protocol.

9. The method of claim 8, wherein the step of transmitting the request to change from the preferred wireless protocol used in the wireless data session to another common wireless protocol comprises the step of transmitting the request utilizing the preferred wireless protocol.

10. The method of claim 8, wherein the step of establishing wireless communication between the first and the second wireless devices comprises the step of utilizing a first wireless protocol for the wireless communication, wherein the step of negotiating the preferred wireless protocol results in utilizing a second wireless protocol in the wireless data session, and wherein the step of transmitting the request to change from the preferred wireless protocol used in the wireless data session to another common wireless protocol comprises the step of transmitting the request utilizing the first wireless protocol.

11. A first wireless device, comprising:

a wireless network interface including communication circuitry adapted to communicate in accordance with at least one wireless protocol; and

a network driver including a wireless capabilities manager, the wireless capabilities manager configuring the wireless network interface to utilize a particular wireless protocol to establish wireless communication with a second wireless device,

wherein the wireless capabilities manager;

(A) provides first information of wireless capabilities supported by the first wireless device to the wireless network card for transmission via the particular wireless protocol;

(B) receives second information of wireless capabilities supported by the second wireless device via the particular wireless protocol;

(C) compares the first information with the second information to determine common wireless capabilities including at least two common wireless protocols;

(D) negotiates a preferred wireless protocol from the at least two common wireless protocols based on preference information stored on the first wireless device and the second wireless device, the preference information indicating connection priorities for the at least two common wireless protocols on each of the respective wireless devices, wherein negotiating comprises;

i. exchanging messages between the first wireless device and the second wireless device, the messages indicating the preference information for the respective wireless devices; and

ii. selecting the preferred wireless protocol as the one of the at least two common wireless protocols having a highest connection priority as indicated by the exchanged preference information; and

(E) configures the wireless interface to utilize the preferred wireless protocol.

12. The first wireless device of claim 11, wherein the wireless capabilities manager disables all communication circuitry not required to communicate via the preferred wireless protocol.

13. The first wireless device of claim 11, wherein the wireless network interface includes communication circuitry adapted to communicate in accordance with a plurality of wireless protocols, and wherein the wireless capabilities manager disables the communication circuitry adapted to communicate in accordance with all wireless protocols other than the particular wireless protocol used to establish wireless communication with the second wireless device.