Enhanced channel access mechanisms for an HPNA network

• US 7,779,150 B1
• Filed: 11/13/2006
• Issued: 08/17/2010
• Est. Priority Date: 02/20/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Sherman, Matthew J., Lin, Wei
• Primary Examiner(s): WANG, LIANG CHE A
• Application Number:
  US11/598,575
• Time in Patent Office: 1,373 Days
• Field of Search: 709/232, 709/236, 709/245, 370/400, 379/387.01
• US Class Current: 709/236
• CPC Class Codes: H04L 12/00 Data switching networks interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F13/00
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 12/40156 by using dedicated slots associated with a priority level
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2012/2845 Telephone line
• CPC Class Codes: H04L 2012/5603 Access techniques
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A method and a system is disclosed for providing access in a centralized manner to a communications medium that is suitable for allowing use of a plurality of Home Phoneline Network Association (HPNA) v2 frames. A plurality of messages are transmitted between a first enhanced station and a second enhanced station. Each transmitted message is transmitted in an enhanced frame that has timing to allow an Inter-Frame Gap (IFG). A blocking signal, such as a sine wave signal and a cosine wave signal, is transmitted during at least one IFG between enhanced frames to mask the presence of the IFG to a non-enhanced STA. Alternatively, the blocking signal can be transmitted during at least one reply message. Contention-free access to the communications medium is also provided by transmitting messages in a highest priority level available in an HPNA v2 frame.

Claims

1. A system comprising:

a Media Control station (MC STA) adapted to transmit a first message to a selected enhanced non-Media Controller station (non-MC STA), at least a portion of said first message comprised by at least one enhanced Phoneline Network Association version 2 (HPNA v2) frame having timing to allow an Inter-Frame Gap (IFG), said MC STA adapted to transmit a blocking signal during at least one IFG to mask a presence of said IFG to a non-enhanced station (STA), said presence of said IFG not masked to said selected enhanced non-MC STA, the at least one enhanced HPNA v2 frame comprising a Transmission Duration field in a frame header/preamble.

2. The system of claim 1, further comprising:

said non-enhanced STA.

3. The system of claim 1, further comprising:

a communications network comprising said MC STA, said selected enhanced non-MC STA, and a communications medium adapted to connect said MC STA and said selected enhanced non-MC STA.

4. The system of claim 1, further comprising:

said selected enhanced non-MC STA.

5. The system of claim 1, wherein said MC STA comprises a Quality of Service (QoS) management entity (QME) adapted to receive at least one end-to-end QoS message characterizing a user application, said at least one end-to-end QoS message comprising at least one QoS parameter set that is expressed at a layer that is higher than a-Media Access Control (MAC) sublayer of an HPNA v2 network and is to be passed down to said MAC sublayer of said MC STA to enable QoS traffic transport of said application.

6. The system of claim 1, wherein said MC STA comprises an admission control entity (ACE) adapted to perform an admission control decision relating to an application based on at least one end-to-end Quality of Service (QoS) message characterizing said application.

7. The system of claim 1, wherein said MC STA comprises a frame scheduling entity (FSE) adapted to maintain a frame scheduling table comprising scheduling information adapted to schedule transmission of Phoneline Network Association (HPNA) v2 frames.

8. The system of claim 1, wherein said MC STA comprises a frame classification entity (FCE) adapted to maintain a frame classification table comprising frame classifiers adapted to identify Quality of Service (QoS) parameter values associated with a frame.

9. The system of claim 1, wherein said MC STA is adapted to provide said selected enhanced non-MC STA preferential access to a communications medium, said non-enhanced STA not provided preferential access to said communications medium.

10. The system of claim 1, wherein said MC STA receives a second message from said selected enhanced non-MC STA, at least a portion of said second message comprised by an enhanced HPNA v2 frame.

11. The system of claim 1, wherein said MC STA further transmits said blocking signal during a second message.

12. The system of claim 1, wherein a second message is transmitted from said selected enhanced non-MC STA to at least one other non-MC STA.

13. The system of claim 1, wherein each HPNA v2 frame is timed to allow a plurality of physical layer priority level slots.

14. The system of claim 1, wherein the first message is transmitted with a highest physical layer priority level available in an HPNA v2 frame.

15. The system of claim 1, wherein said MC STA receives a second message from said selected enhanced non-MC STA, said second message started at a highest physical layer priority level shot available with an HPNA v2-formatted frame.

16. The system of claim 1, wherein said blocking signal is one of a sine wave signal and a cosine wave signal.

18. The system of claim 12, wherein said MS STA is adapted to provide said selected enhanced non-MS STA preferential access to a communications medium, said non-enhanced STA not provided preferential access to said communications medium.

17. A method comprising:

from a Media Control station (MC STA), transmitting a message to a selected enhanced non-Media Controller station (Non-MC STA), at least a portion of said message comprises by at least one enhanced Phoneline Network Association version 2 (HPNA v2) frame having timing to allow an Inter-Frame Gap (IFG), said MC STA adapted to transmit a blocking signal during at least one IFG to mask a presence of said IFG to a non-enhanced station (STA), said presence of said IFG not masked to said selected enhanced non-MC STA, the at least one enhanced HPNA v2 frame comprising a Transmission Duration field in a frame header/preamble.

19. A method comprising:

from a Media Control station (MC STA), transmitting a blocking signal during at least one Inter-Frame Gap IFG, said blocking signal adapted to mask a presence of said IFG to a non-enhanced station (STA), said presence of said IFG not masked to a selected enhanced non-Media Controller station (non-MC STA), said IFG associated with a transmitted message to said selected enhanced non-Media Controller station (non-MC STA), at least a portion of said transmitted message comprised by at least one enhanced Phoneline Network Association version 2 (HPNA v2) frame having timing to allow said IFG, said MC STA is adapted to provide said selected enhanced non-MC STA preferential access to a communications medium, said non-enhanced STA not provided preferential access to said communications medium.