Adaptation to traffic

Traffic in mobile subscriber communication systems is quite non-stationary. Attempts are made currently to describe it on the basis of self-similar hierarchical models. The analysis becomes more complicated due to multi-level priority arrangements used in the praxis. Under these conditions, the fixed equal distribution of the resources between uplinks and downlinks (though the traffic itself has a significant shift to downlink) is an essential limitation in terms of adaptation. The McWiLL system applies the TDD mode with a flexible control over the radio-channel resource distribution between downlink and uplink in proportions from 1:7 to 7:1. The McWiLL system also implements sufficiently small discrete steps in distributing the radio-channel’s resource among individual subscriber connections. So, in the systems of LTE standard the basic mode of operation assumes the minimal portion of the frequency resource  in the subscriber channel equal to 360 kHz while in the McWiLL system such a portion is equal to (1/8)*62.5 kHz = 7.81 kHz. As a result, the economy of the resource becomes significant for low-speed communication channels. Also among the peculiarities of the McWiLL systems is the support of several types of the passive mode for subscriber terminals. These are so called “usual sleeping” mode and “deep sleeping” mode. These two modes differ in periods of subscriber terminals’ check for possible incoming calls. In intermittent states the subscriber equipment remains disconnected. It ensures an additional economy on accumulator charging and on the resource of the broadcast calling channel.  These modes demonstrated their usefulness in the case of collecting data from many sensors.