Multiplex system for sub-channels which have various priority levels
First Claim
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1. A multiplex transmission system having a main transmission channel, an overflow transmission channel, and a plurality of sub-channels having various relative priorities;
- sub-channels which have priorities above a predetermined priority level being high priority sub-channels, access to said overflow transmission channel being authorized only for certain of said high priority sub-channels;
the priority of a sub-channel and whether it has overflow authorization being signified by a priority identification code signal which is transmitted therein when a sub-channel requests access to a transmission channel;
characterized in that said system comprises;
a main multiplexing unit coupled to all of said sub-channels for providing multiplexed access to said main transmission channel for a plurality of sub-channels;
an overflow multiplexing unit coupled to those of said high priority sub-channels which have overflow authorization for providing multiplexed access to said overflow transmission channel for a plurality of high priority sub-channels which have overflow authorization; and
a management unit coupled to all of said sub-channels and which, in response to priority identification code signals from a plurality of sub-channels concurrently requesting access to a transmission channel, is adapted to;
i. control said main multiplexing unit to provide access to the main transmission channel for up to a first limited number of requesting sub-channels in accordance with their relative priorities; and
ii. control said overflow multiplexing unit to provide access to the overflow transmission channel for up to a second limited number of requesting high priority sub-channels which have overflow authorization but do not qualify for access to the main transmission channel.
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Abstract
A multiplex system having a main transmission channel (MC) for transmitting or not, within a pass-band corresponding to the information rate, information signals coming from a plurality of sub-channels in accordance with the priority levels of the sub-channels. A priority level having overflow authorization is assigned to certain of the sub-channels, an overflow transmission channel (OC) being provided for transmission by sub-channels having overflow authorization when the main channel (MC) is saturated.
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2 Claims
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1. A multiplex transmission system having a main transmission channel, an overflow transmission channel, and a plurality of sub-channels having various relative priorities;
- sub-channels which have priorities above a predetermined priority level being high priority sub-channels, access to said overflow transmission channel being authorized only for certain of said high priority sub-channels;
the priority of a sub-channel and whether it has overflow authorization being signified by a priority identification code signal which is transmitted therein when a sub-channel requests access to a transmission channel;
characterized in that said system comprises;a main multiplexing unit coupled to all of said sub-channels for providing multiplexed access to said main transmission channel for a plurality of sub-channels; an overflow multiplexing unit coupled to those of said high priority sub-channels which have overflow authorization for providing multiplexed access to said overflow transmission channel for a plurality of high priority sub-channels which have overflow authorization; and a management unit coupled to all of said sub-channels and which, in response to priority identification code signals from a plurality of sub-channels concurrently requesting access to a transmission channel, is adapted to; i. control said main multiplexing unit to provide access to the main transmission channel for up to a first limited number of requesting sub-channels in accordance with their relative priorities; and ii. control said overflow multiplexing unit to provide access to the overflow transmission channel for up to a second limited number of requesting high priority sub-channels which have overflow authorization but do not qualify for access to the main transmission channel. - View Dependent Claims (2)
- sub-channels which have priorities above a predetermined priority level being high priority sub-channels, access to said overflow transmission channel being authorized only for certain of said high priority sub-channels;
Specification