Device and method for implenting dynamic adjustmenting bandwidth of data in a transmission device
A method and a device for realizing dynamic adjustment of data bandwidth of the invention are disclosed. The method comprises adding a control channel in a PCM trunk link to describe occupancy condition of time slots for current services. The device comprises a control word process circuit, a time slot distribution circuit and a CPU interface circuit, wherein the control word process circuit is designed to complete abstraction and insertion of control information in a control channel of E1/T1 link, the time slot distribution circuit completes separating voice time slots from Ethernet data time slots and rebuilding the data, and the CPU interface circuit implements time slot distribution control. The method and the device can implement dynamic adjustment of Ethernet data bandwidth while ensuring voice services, to make effective use of trunk bandwidth and enhance user's data service bandwidth, without error code and interruption of data service during bandwidth adjustment.
1. A method for realizing dynamic adjustment of data bandwidth in transmission equipment, comprising adding, by a device for realizing dynamic adjustment of data bandwidth in transmission equipment, a control channel in a trunk link of the transmission equipment for describing occupancy on time slots by a current service, and further comprising informing a time slot distribution circuit by CPU of time slots to be occupied by a voice service as voice call begins when the current service is multiplexed to a direction of E1/T1 link;
releasing the time slots from data service by the time slot distribution circuit, and distributing to the voice service;
informing the time slot distribution circuit by the CPU of the time slot having been released by the voice service after voice call finishes; and
distributing the time slots to data service by the time slot distribution circuit, whereby dynamic adjustment of data service is implemented.
2. The method for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 1 , wherein the control channel implements dynamic distribution on time slots in PCM line under control of the CPU.
3. The method for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 2 , wherein the dynamic distribution on time slots is controlled by channel control words written in the control channel, and the control channel comprises one or more time slots.
4. The method for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 1 , wherein the current service comprises voice service and data service.
5. The method for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 1 , wherein the method is applied in peer networking.
6. The method for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 1 , wherein the device for realizing dynamic adjustment of data bandwidth in transmission equipment comprises: a control word process circuit, a time slot distribution circuit and a CPU interface circuit, the control word process circuit is designed to complete extraction and insertion of control information in the control channel of E1/T1 link; the time slot distribution circuit is designed to complete separating voice time slots from Ethernet data time slots, and rebuilding data; the CPU interface circuit implements controlling on time slot distribution.
7. A device for realizing dynamic adjustment of data bandwidth in transmission equipment, comprising: a control word process circuit, a time slot distribution circuit and a CPU interface circuit, wherein the control word process circuit is designed to complete extraction and insertion of control information describing occupancy on time slots by a current service in control channel of E1/T1 link; the time slot distribution circuit is designed to complete separating voice time slots from Ethernet data time slots, and rebuilding data; the CPU interface circuit implements controlling on time slot distribution and informing the time slot distribution circuit by the CPU of time slots to be occupied by a voice service as voice call begins.
8. The device for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 7 , wherein the device further comprises High Level Data Link Control (HDLC), Media Access Control (MAC) frame process circuit to implement processing HDLC link for Ethernet data, checking integrity of MAC frame, comparing and learning MAC addresses.
9. The device for realizing dynamic adjustment of data bandwidth in transmission equipment of claim 7 , wherein the time slot distribution circuit is controlled by channel control words written in the control channel, and the control channel comprises one or more time slots.