[go: up one dir, main page]

GB1527370A - Communication network - Google Patents

Communication network

Info

Publication number
GB1527370A
GB1527370A GB5296075A GB5296075A GB1527370A GB 1527370 A GB1527370 A GB 1527370A GB 5296075 A GB5296075 A GB 5296075A GB 5296075 A GB5296075 A GB 5296075A GB 1527370 A GB1527370 A GB 1527370A
Authority
GB
United Kingdom
Prior art keywords
traffic
vac
nau
information
mask
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5296075A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/537,502 external-priority patent/US4009347A/en
Priority claimed from US05/537,212 external-priority patent/US4009344A/en
Priority claimed from US05/537,501 external-priority patent/US4009346A/en
Priority claimed from US05/537,211 external-priority patent/US4009343A/en
Priority claimed from US05/537,281 external-priority patent/US4009345A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1527370A publication Critical patent/GB1527370A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18528—Satellite systems for providing two-way communications service to a network of fixed stations, i.e. fixed satellite service or very small aperture terminal [VSAT] system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

1527370 Automatic exchange systems INTERNATIONAL BUSINESS MACHINES CORP 29 Dec 1975 [30 Dec 1974 (5) 26 June 1975] 52960/75 Heading H4K The Specification relates to the network access units, NAU, of the satellite communication system disclosed in American Specification 4,009,343 and the particular emphasis is on the function of the NAU as regards the reordering of information received from the satellite and the generation of a destination oriented VAC mask from the VAC masks transmitted by the branch exchanges 10. A full description of the complete system is given in US. The NAU receives from each branch exchange 10 in each 6 m.s. period a frame comprising a signalling channel, a VAC mask and 46, 24 byte, blocks of telecommunication traffic information. The VAC mask and the traffic bytes for each trunk are received in a respective input buffer INTICS and are then transferred to one of eight storage compartments of traffic buffer 12.2 to be eventually passed to the satellite as a traffic burst. Incoming traffic from the satellite for distribution at the NAU is stored in another partition of the traffic buffer 12.2. The VAC masks are recovered at 12.3 and are used to distinguish channels of traffic information scheduled for handling by the particular NAU 12. The masks are retained and utilized to perform relocational mapping of traffic buffer addresses containing the received traffic information relative to virtual channels of outletassociated digital links to which the information is to be passed. Thereafter the information is processed in virtual channel order to perform a reverse activity comparison when the virtual channel load of any branch digital trunk exceeds the actual link capacity of 46 channels, and also to form a destination-oriented VAC mask for each trunk. The unit utilizes stored programme control. For further details of the NAU and the rest of the system reference is directed to the above Specifications.
GB5296075A 1974-12-30 1975-12-29 Communication network Expired GB1527370A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US05/537,502 US4009347A (en) 1974-12-30 1974-12-30 Modular branch exchange and nodal access units for multiple access systems
US05/537,212 US4009344A (en) 1974-12-30 1974-12-30 Inter-related switching, activity compression and demand assignment
US05/537,501 US4009346A (en) 1974-12-30 1974-12-30 Distributional activity compression
US05/537,211 US4009343A (en) 1974-12-30 1974-12-30 Switching and activity compression between telephone lines and digital communication channels
US05/537,281 US4009345A (en) 1974-12-30 1974-12-30 External management of satellite linked exchange network
US59954775A 1975-06-26 1975-06-26

Publications (1)

Publication Number Publication Date
GB1527370A true GB1527370A (en) 1978-10-04

Family

ID=27560108

Family Applications (4)

Application Number Title Priority Date Filing Date
GB5295875A Expired GB1525100A (en) 1974-12-30 1975-12-29 Communication network
GB5295975A Expired GB1526960A (en) 1974-12-30 1975-12-29 Communication network
GB5296275A Expired GB1526230A (en) 1974-12-30 1975-12-29 Communication network
GB5296075A Expired GB1527370A (en) 1974-12-30 1975-12-29 Communication network

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB5295875A Expired GB1525100A (en) 1974-12-30 1975-12-29 Communication network
GB5295975A Expired GB1526960A (en) 1974-12-30 1975-12-29 Communication network
GB5296275A Expired GB1526230A (en) 1974-12-30 1975-12-29 Communication network

Country Status (1)

Country Link
GB (4) GB1525100A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026328A2 (en) * 1979-09-28 1981-04-08 International Business Machines Corporation Demand assignment method and system for a time division multiple access satellite communication network
US4397018A (en) 1979-10-17 1983-08-02 Ibm Corporation Baton passing method and apparatus for maintaining synchronization in a TDMA satellite communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026328A2 (en) * 1979-09-28 1981-04-08 International Business Machines Corporation Demand assignment method and system for a time division multiple access satellite communication network
EP0026328A3 (en) * 1979-09-28 1981-04-22 International Business Machines Corporation Demand assignment method and system for a time division multiple access satellite communication network
US4397018A (en) 1979-10-17 1983-08-02 Ibm Corporation Baton passing method and apparatus for maintaining synchronization in a TDMA satellite communication system

Also Published As

Publication number Publication date
GB1526960A (en) 1978-10-04
GB1526230A (en) 1978-09-27
GB1525100A (en) 1978-09-20

Similar Documents

Publication Publication Date Title
EP0179979B1 (en) Synchronous packet voice/data communications system
US5214642A (en) ATM switching system and adaptation processing apparatus
US4903261A (en) Synchronous packet voice/data communication system
US4910731A (en) Switching system and method of construction thereof
US5524007A (en) Network interface architecture for a packet switch communication system
ES443930A1 (en) Inter-related switching, activity compression and demand assignment
JPS63294036A (en) Header driving type packet switchboard
GB1525127A (en) Switching networks
US3848093A (en) Apparatus and method for increasing the transmission capacity of a time division synchronous satellite telecommunication system
ES8205092A1 (en) Time division switching system.
GB2267016B (en) Multi-equipment routing method and master station for layered protocol communication network system
EP0809380A2 (en) Switching system for switching a fixed-length cell
US4935866A (en) Multiprocessor control system
US4598404A (en) Data format arrangement for communication between the peripheral processors of a telecommunications switching network
GB1483273A (en) Switching network for coded messages
GB1527370A (en) Communication network
CA1229154A (en) Remote data link controller having multiple data link handling capabilities
GB1529086A (en) Electronic tdm data switching systems
US4166198A (en) Process for operating sub-zones of a digital t.d.m. telecommunications network for long distance traffic
GB1465076A (en) Pcm tdm telecommunications systems
EP0226688B1 (en) Serial link adapter for a communication controller
US6044078A (en) Method of and system for exchanging information of payload fields of ATM cells
JPS5927554B2 (en) signal blocking device
JPH04120898A (en) In-band signal exchange method
ES8500692A1 (en) Integrated communication system.

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee