Optimized sleep mode operation
View Patent ↗The invention relates to operations in TDD (time division duplex) mode in third generation cellular telecommunication systems. According to the invention, the power level of midamble of the burst sent in the slot of the PICH channel has a predefined relation to the power level of the bursts sent at the primary CCPCH channel. This allows the mobile communication means to receive only one burst for obtaining both desired pieces of information by decoding the PICH bits to find out if a paging message is to be received, and measuring the reception level of the midamble of the PICH burst for determining the quality of the radio connection.
1. Method for transmitting paging indicators in a cellular telecommunication system employing time division duplex mode, in which method information is carried in bursts over the air interface, and in which method paging indicators are carried in data part of certain bursts having at least a data part and a training sequence part,
wherein a transmission level of at least a training sequence part of a burst carrying paging indicators has a predefined relation to the transmission level of the training sequence part of a burst belonging to a channel which is used in measurements of radio link quality.
2. A method according to claim 1 , wherein said channel is the primary common control physical channel.
3. A method according to claim 1 , wherein said predefined relation is that the transmission level of at least the training sequence part of a burst carrying paging indicators is essentially the same as the transmission level of the training sequence part of a burst belonging to said channel.
4. A method in a mobile terminal of a cellular telecommunication network for measuring quality of a radio link between the mobile terminal and a base station of the network, which mobile terminal is arranged to employ time division duplex mode and to receive bursts carrying information from the base station, the bursts having at least a data part and a training sequence part, and which mobile terminal is arranged to receive paging indicators carried in certain bursts, wherein the method comprises steps, in which
a burst carrying paging indicators is received,
a reception level of the training sequence part of said burst is measured, and
a result value indicating the quality of the radio link is determined on a basis of said measurement of the reception level of the training sequence part of said burst.
5. A mobile terminal of a cellular telecommunication network, which mobile terminal is arranged to employ time division duplex mode and to receive bursts carrying information from a base station, the bursts having at least a data part and a training sequence part, and which mobile terminal is arranged to receive paging indicators carried in certain bursts, wherein the mobile terminal comprises:
means for receiving a paging indicator burst,
means for measuring a reception level of the training sequence part of said paging indicator burst, and
means for determining a result value indicating a quality of the radio link on a basis of the output of said means for measuring.
6. A system in a radio access network of a cellular telecommunication system employing time division duplex mode, in which mode information is carried in bursts over the air interface, and in which mode paging indicators are carried in data part of certain bursts having at least a data part and a training sequence part,
wherein the system comprises means for adjusting a transmission level of at least the training sequence part of a burst carrying paging indicators to a certain level, said certain level having a predefined relation to the transmission level of the training sequence part of a burst belonging to a channel which is used in measurements of radio link quality.
7. A system according to claim 6 , wherein said channel is the primary common control physical channel.
8. A system according to claim 6 , wherein said predefined relation is that the transmission level of at least the training sequence part of a burst carrying paging indicators is essentially the same as the transmission level of the training sequence part of a burst belonging to said channel.