CA2025969A1 - Transposed multi-channel switching - Google Patents
Transposed multi-channel switchingInfo
- 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
Links
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
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.
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.
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)
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 |
-
1990
- 1990-09-21 CA CA 2025969 patent/CA2025969C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2025969C (en) | 1993-04-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |