System for, and method of, managing voice congestion in a network environment

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels through a network including network nodes and data links between the network nodes and between the network nodes and the channels, comprising the steps at the second channel of:

• receiving a congested encountered signal from an individual one of the nodes between the first and second channels when packets of voice signals are transmitted from the first channel in a particular bandwidth and with a particular compression,
• entering a remote congested state in the second channel after receiving a congestion encountered signal from the individual one of the
• thereafter transmitting the congestion encountered signal to the first channel to provide for the reduction in the bandwidth from the particular value and the increase in the compression from the particular value in the voice signals transmitted from the first channel to the second channel,
• receiving the packets of the voice signals transmitted from the first channel at the reduced bandwidth and the increased compression,
• providing a congestion clear signal when the second channel receives, without any congestion continuously for a particular period of time, the packets of the voice signals transmitted by the first channel at the reduced bandwidth and the increased compression, and
• thereafter transmitting the congestion clear signal to the first channel to obtain the transmission of the packets of voice signals from the first channel to the second channel at the particular bandwidth and with the particular compression.

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels through a network including network nodes and data links between the network nodes and between the network nodes and the channels, the steps at the second channel of:

• receiving a congested encountered signal from an individual one of the nodes between the first and second channels when voice signals are transmitted from the first channel in a particular bandwidth and with a particular compression,
• transmitting the congestion encountered signal to the first channel to provide for the reduction in the bandwidth from the particular value and the increase in the compression from the particular value in the voice signals transmitted from the first channel to the second channel,
• receiving the voice signals transmitted from the first channel at the reduced bandwidth and the increased compression,
• providing a congestion clear signal when the second channel receives, without any congestion for a particular period of time, the voice signals transmitted by the first channel at the reduced bandwidth and the increased compression,
• transmitting the congestion clear signal to the first channel to obtain the transmission of the voice signals from the first channel to the second channel at the particular bandwidth and with the particular compression,
• entering a remote congested state in the second channel after receiving a congested encountered signal from the individual one of the nodes and before transmitting the congested encountered signal to the first channel, and
• providing a congestion clear state when the second channel receives, without any congestion for a particular period of time, the voice signals transmitted by the first channel at the reduced bandwidth and the increased compression before it transmits the congestion clear signal to the first channel.

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels through a network including network nodes and data links between the network nodes between the network nodes and the channels, comprising the steps of:

• providing successive packets of voice signals each containing a plurality of bits representing voice information in compressed form and each containing at least one particular bit indicating whether or not congestion has been encountered,
• detecting the encounter of congestion at an individual one of the different nodes between the first channel and the second channel,
• indicating in the particular bit in the packet the encounter of congestion at one of the different nodes between the first channel and the second channel;
• receiving the packets at the second channel with the particular bit indicating the encounter of congestion,
• sending from the second channel to the first channel an acknowledgement of the sending of the successive packets of voice signals, the acknowledgement including an indication of the encounter of congestion in the transmission of the packets of voice signals between the first and second channels, and
• thereafter sending the successive packets of voice signals at a reduced bandwidth and with an increased compression from the first channel to the second channel.

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels through a network including network nodes and data links between the network nodes and between the network nodes and the telephone channels, the steps at the first channels of:

• providing successive packets of voice signals each containing bits indicating the characteristics of the voice signals in the packets and each providing at least one additional bit to indicate the presence or absence of packet congestion at any one of the successive nodes between the first and second channels and each having a particular bandwidth,
• receiving an acknowledgement from the second channel of the receipt at the second channel of the packets of voice signals, each acknowledgement containing an indication of the presence or absence of packet congestion at any one of the successive nodes between the first and second channels,
• reducing below the particular bandwidth the bandwidth of the voice signals in the packets transmitted from the first channel to the second channel when the first channel receives an acknowledgement with an indication of the presence of packet congestion at one of the successive nodes between the first and second channels,
• providing the voice signals in each packet with a particular compression when the voice signals have the particular bandwidth, and
• providing the voice signals in each packet with an increased compression greater than the particular compression when the voice signals have a bandwidth less than the particular bandwidth.

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels including network nodes and data links between the network nodes and between the network nodes and the telephone channels, comprising the steps at the second channel of:

• receiving the voice signals in successive packets at a particular bandwidth and with a particular compression after the travel of these signals from the first channel through the network nodes and the data links to the second channel, each of the packets having a plurality of bits representing voice information and at least one particular bit representing the occurrence of congestion or lack of congestion of the packets of voice signals in the network nodes and the data links,
• acknowledging to the first channel the reception of the packets of voice signals from the first channel at the particular bandwidth and with the particular compression and any indication in such packets of the congestion of the voice signals, and
• thereafter receiving the packets of the voice signals from the first channel, at a reduced bandwidth relative to the particular bandwidth and an increased compression relative to the particular compression, of the voice signals in the packets when the second channel provides an indication to the first channel of a congestion in the voice signals in the network nodes and the data links.

In a method of preventing congestion in the transmission of voice signals between first and second voice channels through a network including network nodes and data links between the network nodes and between the network nodes and the channels, comprising the steps of:

• providing the voice signals with a particular bandwidth and with a particular compression at the first channel,
• sending the voice signals with the particular bandwidth and the particular compression from the first channel through the data links and the network nodes to the second channel,
• detecting congestion of the voice signals at an individual one of the network nodes,
• generating a congestion encountered signal at the individual one of the nodes for transmission through the data links and the nodes to the second channel,
• transmitting a congestion encountered signal from the second channel to the first channel when the congestion encountered signal is received at the second channel, the congestion encountered signal indicating only the existence or lack of existence of a congestion, and
• reducing below the particular bandwidth the voice signals provided at the first channel for transmission to the second channel and simultaneously increasing the compression of the voice signals at the first channel above the particular compression, and
• thereafter transmitting a signal from the second channel to the first channel, after the transmission by the first channel of the signals at the reduced bandwidth and the increased compression for a particular period of time and the reception of such signals at the second channel, to indicate that the congestion encountered state at the second channel has been eliminated.

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels through a network including network nodes and data links between the network nodes and between the network nodes and the telephone channels, comprising the steps at the first channel of:

• providing at the first channel successive packets of voice signals each containing binary bits indicating the characteristics of the voice signals in the packets and each having a particular bandwidth and a particular compression,
• receiving at the first channel an acknowledgement from the second channel of the receipt at the second channel of the packets of voice signals, each acknowledgement containing an indication in an additional binary bit of the presence or absence of packet congestion at any one of the successive nodes between the first and second channels,
• reducing below the particular bandwidth at the first channel the bandwidth of the voice signals in the packets transmitted from the first channel to the second channel, and increasing the compression of the voice signals above the particular compression, when the first channel receives an acknowledgement from the second channel with an indication in the additional binary bit of the presence of packet congestion at one of the successive nodes between the first and second channels, and
• increasing the bandwidth of the voice signals at the first channel to the particular bandwidth, and reducing the compression of the voice signals to the particular compression, when the first channel receives an acknowledgement from the second channel in the additional binary bit that the packet congestion has been eliminated at the second channel.

In a method of preventing congestion in the transmission of voice signals between first and second voice channels through a network including network nodes and data links between the network nodes and between the network nodes and between the channels, comprising the steps of:

• providing the voice channels at the first channel with a particular bandwidth and a particular compression,
• sending the voice signals from the first channel with the particular bandwidth and the particular compression through the data links and the network nodes to the second channel,
• detecting congestion of the voice signals at an individual one of the network nodes,
• generating a congestion encountered signal at the individual one of the network nodes for transmission through the data links and the network nodes to the second channel,
• entering a remote congested state at the second channel when a congestion encountered signal is generated at the individual one of the network nodes,
• sending a congestion encountered signal from the second channel to the first channel, the congestion encountered signal indicating only the entering or lack of entering of the remote congested state at the second station,
• entering at the first channel the congested encountered signal transmitted from the second channel, and
• reducing the bandwidth of the voice signals below the particular bandwidth and increasing the compression of the voice signals above the particular compression, in response to the local congested state entered at the first channel, in the voice signals sent from the first channel to the second channel.

In a method of preventing congestion in the transmission of voice signals between first and second telephone channels including network nodes and data links between the network nodes and between the network nodes and the telephone channels, comprising the steps at the second channel of:

• receiving the voice signals in successive packets at a particular bandwidth and a particular compression after the travel of these signals from the first channel through the network nodes and the data links to the second channel, each of the packets having a plurality of bits representing voice information and at least one particular bit representing the occurrence or lack of occurrence of congestion of the packets of voice signals in the network nodes and the data links,
• entering a remote congested state in the second channel when congestion has been encountered in one of the network nodes and data links between the first and second channels,
• returning a congestion encountered signal from the second channel to the first channel, the congestion encountered signal indicating only the entering or lack of entering of the remote congested state in the second station,
• receiving the packets of the voice signals from the first channel, at a reduced bandwidth and an increased compression relative to the particular bandwidth and the particular compression, after the return of the congestion encountered signal from the second channel to the first channel, and
• clearing the remote congested state in the second channel after the second channel has received the voice signals from the first channel at the reduced bandwidth and the increased compression for a particular period of time without any congestion.