Apparatus and method for integrating short-range wireless personal area networks for a wireless local area network infrastructure

• US 8,165,102 B1
• Filed: 09/29/2011
• Issued: 04/24/2012
• Est. Priority Date: 03/14/2005
• Status: Active Grant

• Current Assignee: Ozmo Licensing LLC
• Original Assignee: Ozmo, Inc. (Microchip Technology Incorporated)
• Inventors: Vleugels, Katelijn, Peeters, Roel
• Primary Examiner(s): Wong, Warner
• Assistant Examiner(s): TANG, KIET G
• Application Number:
  US13/249,059
• Time in Patent Office: 208 Days
• Field of Search: 370/509, 370/338, 455/41.2, 455/1, 709/227, 710/1
• US Class Current: 370/338
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 52/0212 managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A network system comprises a first logic block providing a link to a first network via an access point of a WLAN and a second logic block communicating with a node of a second network (such as a WPAN) and configured to provide a link between the node and the first network via the access point. The network system is configured to maintain continuous connections to both the access point and the node while receiving power. The second logic block can communicate with the node using a modified communication protocol that is only partially compliant with an 802.11x communications protocol. A wireless hub can integrate a WPAN with a WLAN including, in part, a wireless circuit compliant with the WLAN standard (such as an 802.11x standard), a processor, and a memory. The wireless circuit can connect to the WPAN without losing connectivity (such as association and synchronization) to the WLAN.

Claims

1. A network-enabled hub, usable for facilitating data communications between two or more wireless devices that are configured to communicate indirectly with each other via the network-enabled hub, comprising:

an interface to a wireless radio circuit that can send and receive data wirelessly, providing the hub with bi-directional wireless data communication capability;

logic for processing data received via the wireless radio circuit;

logic for generating data to be transmitted by the wireless radio circuit;

logic for initiating and maintaining network connections with nodes of a wireless network external to the network-enabled hub, maintaining at least a first network connection using a first network protocol and a second network connection using a second network protocol, that can be maintained, at times, simultaneously with each other, wherein the second network protocol is an overlay protocol with respect to the first network protocol in that communications using the second network protocol are partially consistent, but not entirely consistent, with the first network protocol; and

data forwarding logic, implemented in the network-enabled hub using hardware and/or software, that forwards data between an originating node and a destination node, wherein the originating node is a node in of one of the first and second networks and the destination node is a node in the other of the first and second networks, the data forwarding logic also capable of identifying an address of the destination node in the data packet in order to use that address to transmit data into the second network.

2. The network-enabled hub of claim 1, further comprising a routing module for receiving a poll request that contains information required to unambiguously identify a station that is a node in the second network, wherein the routing module coordinates retrieval of information from the station.

3. The network-enabled hub of claim 1, wherein the first network connection provides a link via an access point of a wireless LAN and the second network connection provides a link to a personal area network (“

PAN”

) serving PAN devices, such that network nodes that have access to the wireless LAN can address packets to PAN devices that are nodes on the PAN.

4. The network-enabled hub of claim 3, wherein the network-enabled hub is configured to accept packets from the PAN devices where the packets are addressed to network devices that are accessible only via the network-enabled hub.

5. The network-enabled hub of claim 3, further comprising:

at least one software module forming a software platform that allows the wireless radio circuit to connect to both the wireless LAN and the PAN; and

an operating system that enables operation of the network-enabled hub and execution of user-written application-specific application software for the network-enabled hub.

6. The network-enabled hub of claim 1, wherein the second network protocol is a protocol that requires lower average power consumption over time relative to the first network protocol.

7. The network-enabled hub of claim 1, wherein the first network protocol is an 802.11x wireless protocol and the second network protocol is a modification of the 802.11x wireless protocol that is not entirely compliant with the 802.11x wireless protocol of the first network but can be maintained in a common wireless space as the 802.11x wireless protocol.

8. The network-enabled hub of claim 7, wherein the second network protocol is a protocol that allows for the network-enabled hub and the node in the second network to maintain the second network connection during a mutually agreeable inactivity period during which one or both of the network-enabled hub and the node is configurable such that it can enter an inactivity period wherein at least some communication function is disabled such that less power per unit time is consumed to power consumed when the communication function is not disabled.

9. The network-enabled hub of claim 1, wherein the network-enabled hub and a device at the node in the second network other than network-enabled hub are configured to support a discovery mode using the second network, wherein the network-enabled hub and the device include logic, in one or both of the network-enabled hub and the device, for initiating device discovery by sending broadcast discovery requests on a pre-defined channel, further wherein both the network-enabled hub and the device are configured to have knowledge of the definition of the pre-defined channel, known prior to initiation of discovery.

10. The network-enabled hub of claim 9, wherein the network-enabled hub and the device further include logic, in one or both of the network-enabled hub and the device, for indicating characteristics and/or state of the network-enabled hub and/or device.

11. The network-enabled hub of claim 1, wherein the network-enabled hub includes logic to coordinate a mutually agreeable inactivity period between the network-enabled hub and wireless personal area network (“

WPAN”

) devices such that the WPAN devices can enter a sleep mode and occasionally wake up to transmit or receive data and/or control signals, with the network-enabled hub and WPAN devices synchronized so that the network-enabled hub is able to communicate with WPAN devices when WPAN devices wake up.

12. The network-enabled hub of claim 11, wherein the network-enabled hub is configured to sleep for at least a portion of the mutually agreeable inactivity period.

13. The network-enabled hub of claim 1, further comprising the wireless radio circuit interfaced to the logic for processing data, wherein the wireless radio circuit supports communications on both the first network and the second network.

14. The network-enabled hub of claim 1, further comprising a housing into which electronic components can be housed internally.

15. The network-enabled hub of claim 1, further comprising a power module that receives power from an integrated wall plug.

16. The network-enabled hub of claim 1, wherein the network-enabled hub is embedded into a personal computer, a cellular phone, or home entertainment equipment.

17. The network-enabled hub of claim 1, wherein a device that is a node of the second network is one of a wireless mouse, wireless keyboard, wireless headset, personal digital assistant (“

PDA”

), or portable printer.

18. The network-enabled hub of claim 17, further comprising a power module that receives power from an integrated wall plug.

19. A computing device having therein a network-enabled hub, comprising hardware and software, usable for facilitating data communications between two or more wireless devices that are configured to communicate indirectly with each other via the network-enabled hub, comprising:

a wireless radio circuit that can send and receive data wirelessly, providing the hub with bi-directional wireless data communication capability, the radio circuit configured to handle 802.11x packet transmissions, and wherein the wireless radio circuit supports communications on both a wireless local area network (“

WLAN”

) and wireless personal area network (“

WPAN”

);

logic for processing data received via the wireless radio circuit;

logic for generating data to be transmitted by the wireless radio circuit;

logic for initiating and maintaining network connections with nodes of the WLAN and WPAN external to the network-enabled hub, maintaining at least a first network connection using a first network protocol, of the WLAN, and a second network connection using a second network protocol, of the WPAN, that can be maintained, at times, simultaneously with each other, wherein the second network protocol is an overlay protocol with respect to the first network protocol in that communications using the second network protocol are partially consistent, but not entirely consistent, with the first network protocol, and wherein the first network protocol is an 802.11x wireless protocol and the second network protocol is a modification of the 802.11x wireless protocol that is not entirely compliant with the 802.11x wireless protocol of the first network but can be maintained in a common wireless space as the 802.11x wireless protocol;

logic for data forwarding between an originating node that is a node in of one of the first and second networks and a destination node that is a node in of the other of the first and second networks, the logic for data forwarding including logic for processing a data packet from the originating node to identify an address of the destination node in the data packet and using that address to transmit data into the second network, wherein a received poll request contains information required to unambiguously identify a station that is at the destination node in the second network;

at least one software module forming a software platform that allows the wireless radio circuit to connect to both the WLAN and the WPAN, and coordinate retrieval of information from the station; and

an operating system that enables operation of the network-enabled hub and execution of user-written application-specific application software for the network-enabled hub,

wherein the first network connection provides a link via an access point of the WLAN and the second network connection provides a link to the WPAN serving PAN devices, such that network nodes that have access to the WLAN can address packets to WPAN devices that are nodes on the WPAN and packets can be conveyed from a WPAN device, through the network-enabled hub, to the access point and from there to a destination over the Internet from the access point, and wherein the WPAN device'"'"'s access to the Internet is via the network-enabled hub.

20. The computing device of claim 19, wherein the network-enabled hub includes logic to coordinate a mutually agreeable inactivity period between the network-enabled hub and WPAN devices such that the WPAN devices can enter a sleep mode and occasionally wake up to transmit or receive data and/or control signals, with the network-enabled hub and WPAN devices synchronized so that the network-enabled hub is able to communicate with WPAN devices when WPAN devices wake up, and wherein the network-enabled hub is configured to sleep for at least a portion of the mutually agreeable inactivity period, while maintaining connections between the network-enabled hub and the WPAN devices and between the network-enabled hub and the access point.

21. The computing device of claim 19, wherein the WPAN devices are IP-addressable.

22. The computing device of claim 19, configured to communicate with WPAN devices having externally supplied power.

23. The computing device of claim 22, wherein the WPAN devices having externally supplied power include a printer with a power cord to supply electrical power to the printer.

24. The computing device of claim 19, wherein the WPAN devices are a computer accessory, a telephone accessory, a wearable device, a wireless headset, a wireless mouse, a wireless keyboard, a wireless recorder, or a wireless telephone.

25. The computing device of claim 19, wherein the a network-enabled hub is a component of a portable computing device, a mobile computing device, a communications device with computing capability, a laptop computer, a desktop computer, a handheld computing device, a pager, or a cellular telephone.