Uplink exchange circuit of asymmetric input and output port and its exchange method
A technology of input and output ports and switching circuits, which is applied in the direction of electrical components, multiplexing system selection devices, selection devices, etc., can solve the problems of large memory occupation and rising device costs, and achieve reduced occupation, device cost reduction, The effect of reducing the number
Active Publication Date: 2011-05-11
ZTE CORP
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Problems solved by technology
In fact, whether it is from more input to less output or from less input to more output, the final effective exchange data is only limited by the data of less ports. The existing exchange scheme obviously has defects in storage, especially in the case of more and less ports. When the quantity differs greatly, the memory occupation is very large, which will lead to a serious increase in the cost of the device
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Embodiment 2
[0071] In order to reduce the cost of changing the selection unit to 36MUX1, the 36MUX1 in Embodiment 1 is simplified to a certain extent to obtain the uplink switch circuit in Embodiment 2. like Figure 8 As shown, will Figure 7 The 36MUX1 in the simplification is that the output terminals of three 12MUX1s are connected to the input terminals of one 3MUX1.
[0072] Below, refer to Figure 9 Embodiment 3 of the present invention is described.
[0073] Embodiment 3 of the present invention uses a combination of six 6MUX1s and one 6MUX1 to simplify the operation of the 36MUX1 in Embodiment 1, that is, to connect the output ends of six 6MUX1s to the input end of one 6MUX1.
[0074] The crux of the problem is that the complexity of selecting cells has negligible impact on device cost, while the reduction of storage capacity is crucial to device cost. In practical applications, assuming we use xilinx's V4LX15 to implement 12MUX1, three 4-input lookup tables (LUT, Look-Up-Table...
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The invention discloses a uplink exchange circuit for asymmetric input and output terminal port and its exchange method which can be used for interchange between N input terminal ports and M output terminal ports, N and M being integer, 0<N<M. Input link comprises n time slots, output link comprises m time slots, n and m is integer bigger than zero. The circuit comprises at least N*n memory cell,at least M*m selected cell, at least M*m exchange control unit and at least M assembling unit. Data in every time slot of N input links is stored corresponding memory cell; when first output link of M output links outputs, selected cell selects memory cell of corresponding time slot corresponding to input link for reading time slot data according to control signal provided by exchange control unit; Assembling unit assembles time slot data read by selected cell into output link according to time slot sequence. So the invention reduces occupation for precious memory resource to a large extent.
Description
technical field [0001] The invention relates to a switching module widely present in various switching devices in the field of communication, in particular to an uplink switching circuit of an asymmetric input and output port and a switching method thereof. Background technique [0002] A switching device is generally included in the communication system to complete the switching between input and output signals of different single boards, so as to achieve the purpose of flexible distribution of signals. For example, in the application of wireless communication systems, multiple baseband resources / single boards can be flexibly switched to multiple radio frequency units / single boards. According to system capacity requirements, the switching unit is generally composed of multiple single boards. In the direction, the input is connected to all baseband resources / single boards, and the output is connected to the radio frequency units / single boards that share the capacity; the opp...
Claims
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IPC IPC(8): H04Q11/00H04Q3/00
Inventor 和宏海
Owner ZTE CORP