Multiplex communications – Wide area network – Packet switching
Patent
1987-12-01
1989-07-04
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 58, H04J 302
Patent
active
048457108
ABSTRACT:
In a communication apparatus of the type performing ISDN LAPD signal processing, the assignment of buffers each for temporarily storing a received data signal is supervised. Idle buffers are reserved in a common idle buffer pool while transmit buffers and receive buffers are supervised for each of service access points. The number of buffers awaiting processing or transmission is monitored at each predetermined period, on the identifier basis. As the number of idle buffers reserved in the idle buffer pool decreases to a value which is less than a predetermined value, the idle buffer assignment allowable for processing is restricted in number on the service access point basis and in a matching relationship to a function of the current number of waiting buffers and a predetermined threshold value. The restriction may be provided with a plurality of different levels, in which case a restriction level border value for a transition in a restriction tightening direction is selected to be smaller than that for a transition in a restriction relaxing direction with respect to the number of idle buffers. The number of idle buffers and the restriction level border value may each be defined per unit time.
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H. Takamura et al., "A Study on Buffer Control for ISDN Switching System", The Institute of Electronics and Communication Engineers of Japan, Technical Report SE86-56, pp. 43-48 (1986).
T. Nakamura et al., "I-Interface Signalling Equipment and the Method of Verification & Estimation of Them", General Conference of the 70th Anniversary of The Institute of Electronics and Communication Engineers of Japan, No. 1850, (1987).
Bamba Hiroshi
Furuhashi Toru
Inagaki Toshihiko
Kishino Kuniaki
Nakamura Tamiya
Jung Min
OKI Electric Industry Co., Ltd.
Olms Douglas W.
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