CA2025969A1 - Transposed multi-channel switching - Google Patents

Transposed multi-channel switching

Info

Publication number
CA2025969A1
CA2025969A1 CA 2025969 CA2025969A CA2025969A1 CA 2025969 A1 CA2025969 A1 CA 2025969A1 CA 2025969 CA2025969 CA 2025969 CA 2025969 A CA2025969 A CA 2025969A CA 2025969 A1 CA2025969 A1 CA 2025969A1
Authority
CA
Canada
Prior art keywords
subset
frame
segment
time
channels
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.)
Granted
Application number
CA 2025969
Other languages
French (fr)
Other versions
CA2025969C (en
Inventor
Maged E. Beshai
L. Anne Garrett
Ian R. Stewart
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA 2025969 priority Critical patent/CA2025969C/en
Publication of CA2025969A1 publication Critical patent/CA2025969A1/en
Application granted granted Critical
Publication of CA2025969C publication Critical patent/CA2025969C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

ABSTRACT
A synchronous time division multiplexing system for multi-channel calls involves dividing each frame into a first segment and a second segment each containing substantially the same number of time slots and dividing the number of channels of the multi-channel call into a first subset and a second subset each containing approximately the same number of channels.
Thereafter, the first subset is assigned to the first segment of the first frame and the second subset to the second segment of the first frame. The invention involves in a first time switching stage transposing the first subset to the second segment of the first frame such that the channels within the first subset occupy eligible free slots and retain their relative order and transposing the second subset to the first segment of the next frame such that the channels within the second subset occupy eligible free slots and retain their relative order. The call subsets are thus transposed during a single stage of time switching. By assigning the selected slots in each segment in an ascending order, the output samples of a call will appear in the proper order but will not be properly positioned in the frame.
When the transposed subsets are likewise switched in a second time-switching stage, the call samples will be positioned properly in the frame. Thus, traversing an even number of time switches, from source to termination, guarantees both frame consistency and the desirable slot order.
CA 2025969 1990-09-21 1990-09-21 Transposed multi-channel switching Expired - Fee Related CA2025969C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2025969 CA2025969C (en) 1990-09-21 1990-09-21 Transposed multi-channel switching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2025969 CA2025969C (en) 1990-09-21 1990-09-21 Transposed multi-channel switching

Publications (2)

Publication Number Publication Date
CA2025969A1 true CA2025969A1 (en) 1992-03-22
CA2025969C CA2025969C (en) 1993-04-20

Family

ID=4146031

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2025969 Expired - Fee Related CA2025969C (en) 1990-09-21 1990-09-21 Transposed multi-channel switching

Country Status (1)

Country Link
CA (1) CA2025969C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115038164A (en) * 2021-03-04 2022-09-09 华为技术有限公司 Communication method and communication device

Also Published As

Publication number Publication date
CA2025969C (en) 1993-04-20

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