Abstract: A computer-implemented method for determining time synchronisation parameters of a communication apparatus in a wireless network. The method comprising transmitting an uplink message at a first time, the first time being the start of a time period (Tperiod) and receiving at least one downlink message, each downlink message being associated with a first round trip delay (TroundAi), a second round trip delay (TroundB(n+1?i)), a first reply time (TreplyA(n+1?i)) and a second reply time (TreplyB1). The method further comprising determining a first difference between the first round trip delay (TroundAi) and the first reply time (TreplyA(n+1?i)); determining a second difference between the second round trip time (TroundB(n+1?i)) and the second reply time (TreplyB1); and calculating an estimated propagation delay (i) based on the sum of the first difference (TroundAi?TreplyA(n+1?i)) and the second difference (TroundB(n+1?i)?TreplyBi).

Abstract: A method of randomly accessing wireless communication resources in a LTE uplink comprising transmitting, by a user device, a plurality of random access requests wherein each request is transmitted on a different communication channel from a plurality of communication channels and each request comprises a preamble generated using a different root sequence. The method further comprises receiving, at the user device, at least one random access response via the plurality of communication channels; and completing a random access procedure on the communication channel which conveyed the random access response.

Abstract: A method of randomly accessing wireless communication resources in a LTE uplink comprising transmitting, by a user device, a plurality of random access requests wherein each request is transmitted on a different communication channel from a plurality of communication channels and each request comprises a preamble generated using a different root sequence.