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US 2004/0170148 A1Published application
Frequency hopping control channel in a radio communication system
OwnerJarri Parkkinen, Esa Jarvelainventors
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OwnerJarri Parkkinen, Esa Jarvelainventors
Estimating the term…
The invention relates to a method for positioning mandatory time division multiple access (TDMA) frames which are mandatory to be transmitted during discontinuous transmissions (DTX) of TDMA frames in traffic channels (TCH) by a fixed sub-system of a radio communications system. It is assumed that said TDMA frames are transmitted using cyclic frequency hopping with two different frequencies. In order to improve air interface measurement methods in a radio access system, it is proposed that said mandatory TDMA frames are positioned for each sub-channel that can be employed as TCH in a way that said mandatory TDMA frames are always transmitted using both of said two different frequencies in the respective sub-channel within a predetermined number of TDMA frames. The invention equally relates to a corresponding radio communications network, a corresponding base station and mobile terminal and a corresponding subset of mandatory TDMA frames.
Method for positioning mandatory time division multiple access (TDMA) frames which are mandatory to be transmitted during discontinuous transmissions (DTX) of TDMA frames in traffic channels (TCH) by a fixed sub-system of a radio communications system, wherein said TDMA frames are transmitted using cyclic frequency hopping with two different frequencies, and wherein said mandatory TDMA frames are positioned for each channel that can be employed as traffic channel in a way that said mandatory TDMA frames are always transmitted using both of said two different frequencies in the respective channel within a predetermined number of TDMA frames.
Method according to one of the preceding claims, wherein said predetermined number of TDMA frames is 104.
Method according to one of the preceding claims, wherein said traffic channels include sub-channels employed for half rate transmissions.
Method according to one of the preceding claims, wherein a mobile terminal receiving said transmitted mandatory TDMA frames measures the signal level of said mandatory TDMA frames for determining a RXLEV_SUB value indicative of the level of received signals.
Method according to one of the preceding claims employed in a GSM communications system.
Method according to one of the preceding claims employed in an EDGE communications system.
A mobile terminal comprising means for receiving time division multiple access (TDMA) frames and for measuring during discontinuous transmissions (DTX) of a fixed sub-system of a radio communications system employing a cyclic frequency hopping with two different frequencies at least the reception levels of received mandatory TDMA frames, wherein the mandatory TDMA frames were transmitted for each channel employed as traffic channel (TCH) in a way that both frequencies are used within a predetermined number of TDMA frames
Subset of time division multiple access (TDMA) frames of a first of two sub-channels used as half rate traffic channels (TCH) for transmissions from a fixed sub-system to mobile terminals of a radio communications system, which subset defines TDMA frames which are mandatory to be transmitted in discontinuous transmissions (DTX) on said first sub-channel, said subset comprising the TDMA frames with frame numbers modulo 104 of “39”, “41”, “143”, “145”, “91”, “193”, “951”, and “197”.
Dependencies are inferred from the claim text.