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US 2011/0085454 A1Published application
System and Method for Auto 10BASE-T/10BASE-Te Selection Based on Cable Characteristics
AssigneeBroadcom Corporation
InventorsWael William Diab, Minshine Shih
Life of this patent
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Abstract
A system and method for auto 10BASE-T/10BASE-Te selection based on cable characteristics. IEEE 802.3az defines a new 10BASE-Te PHY type for energy efficiency that runs on Category 5 or better cabling. Configuration of a PHY that supports both 10BASE-T and 10BASE-Te operating modes is based on measurements that provide an indication of channel characteristics.
Claims22
A method for selecting an operating mode in a physical layer device, comprising:
- measuring, by a first physical layer device, channel characteristics of an Ethernet cable that connects said first physical layer device to a second physical layer device, wherein said first physical layer device supports both 10BASE-T and 10BASE-Te operating modes;
- determining whether said measured channel characteristics indicate that said 10BASE-Te operating mode is supported by said Ethernet cable;
- transmitting, by said first physical layer device to said second physical layer device, autonegotiation information that identifies support by said first physical layer device of said 10BASE-Te operating mode when said determination indicates that said 10BASE-Te operating mode is supported by said Ethernet cable.
A method for selecting an operating mode in a physical layer device, comprising:
- measuring, by a first physical layer device, channel characteristics of an Ethernet cable that connects said first physical layer device to a second physical layer device, wherein said first physical layer device supports both 10BASE-T and 10BASE-Te operating modes;
- and
- transmitting, by said first physical layer device to said second physical layer device, autonegotiation information that is generated based on said measured channel characteristics, said autonegotiation information enabling said second physical layer device to identify whether said 10BASE-Te operating mode can be used.
A method for selecting an operating mode in a physical layer device, comprising:
- measuring, by a first physical layer device, channel characteristics of an Ethernet cable that connects said first physical layer device to a second physical layer device, wherein said first physical layer device supports both 10BASE-T and 10BASE-Te operating modes;
- and
- transmitting, by said first physical layer device to said second physical layer device, information generated based on said measured channel characteristics, said information enabling an autonegotiation process to determine whether at least one of said first and second physical layer devices can use said 10BASE-Te operating mode.
Dependencies are inferred from the claim text.