Title :
Improved TDD resource allocation through inter-mobile interference avoidance
Author :
Lindström, Magnus
Author_Institution :
Dept. of Signals, Sensors & Syst., R. Inst. of Technol., Stockholm, Sweden
Abstract :
Time division duplex systems, in a convenient way, facilitate the implementation of asymmetrical links which are required to efficiently handle the increasingly asymmetric traffic offered by current and future wireless applications. If boundaries between uplink and downlink time-slots are not synchronised among cells, e.g. when different asymmetries are required in different cells, inter-base station (IB) interference and inter-mobile (IM) interference arise. To keep the outage probability at a reasonable level this interference needs to be avoided. In a system with centralised resource allocation, information about IM link gains can be used to estimate IM interference. Measuring all IM link gains is often considered to be an intractable task. Thus, in this paper a simple method to estimate IM link gains and to avoid IM interference is proposed and evaluated. In a centralised system, for the critical case of heavier downlink traffic, the new method significantly improves system capacity
Keywords :
cellular radio; channel capacity; multiuser channels; probability; radio links; radiofrequency interference; telecommunication traffic; time division multiple access; IM link gains; TDD resource allocation; TDMA/TDD cellular system; asymmetric traffic; asymmetrical links; cellular radio; centralised resource allocation; centralised system; downlink time-slots; downlink traffic; inter-base station interference; inter-mobile interference avoidance; inter-mobile link; outage probability; system capacity; time division duplex systems; uplink time-slots; wireless applications; Base stations; Downlink; Gain measurement; Interference; Propagation losses; Radio communication; Resource management; Sensor systems and applications; Time division multiple access; Wireless sensor networks;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944534