Method for regulating transmission power in a radio system
AssigneeSeimens Aktiengesellschaft
InventorVolker Sommer
Life of this patent
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Abstract
The invention relates to a method for regulating the transmission power of a transmitter (BS) in a radio system, for a transmission of data (D) to a receiver (MS) by means of a radio interface. The receiver (MS) determines an actual value (PR) for a qualitative parameter of the received signal, makes a comparison with a set value (Psoll) and, thereafter, transmits comparison information (TPC) on the result of the comparison to the transmitter. Adjustment of the transmission power (PT) of the transmitter (BS) is made based on a correction value for the set value (Psoll) of the qualitative parameter of the received signal, in addition to comparison information (TPC) from the receiver (MS).
Claims9
A method for regulating the transmit power of a transmitter (BS) in a radio system for transmission of data (D) to a receiver (MS) via a radio interface, in which
- the data (D) are transmitted in consecutive timeframes (T),
- information (TFCI) relating to a set value (SIRSoll) of a quality parameter of the receive signal is transmitted in a temporarily recurring manner to the receiver (MS),
- the receiver (MS) determines an actual value (SIRIst) of the quality parameter of the receive signal and, following a comparison (CMP) with the set value (SIRSoll) transmits comparison information (TPC) relating to the result of the comparison to the transmitter,
- the receiver (MS) carries out the set/actual value comparison of the quality parameter of the receive signal in each time frame (T) and thereby uses the respective set value (SIRSoll) last notified in one of the preceding timeframes (T−1) with the corresponding information, and
- when the transmit power (P) of the transmitter (BS) is regulated, a correction value for the set value (SIRSoll) of the quality parameter of the receive signal is additionally taken into account along with the comparison information (TPC) transferred by the receiver (MS), if the set value (SIRSoll) of the preceding time frame (T−1) differs from the set value of the current time frame (T).
The method as claimed in one of the preceding claims, in which
- transport formats which are in each case permitted for the transmission of corresponding data (D) are defined for a plurality of services,
- data of a combination of a plurality of the services are transmitted via a commonly used physical channel, and
- information relating to the combination, used in the current time frame (T), of the transport formats of the services used for data transmission is transmitted from the transmitter (BS) to the receiver (MS) as set value information (TFCI).
A radio system with a transmitter (BS) and a receiver (MS), and with a radio interface for transmission of data (D),
- whose transmitter transmits the data (D) in consecutive time frames (T),
- whose transmitter transfers information (TFCI) relating to a set value (SIRSoll) of a quality
- whose receiver (MS) determines an actual value (SIRIst) of a quality parameter of the receive signal and, following a comparison with the set value (SIRSoll) transfers comparison information (TPC) relating to the result of the comparison to the transmitter,
- whose receiver (MS) carries out the set/actual value comparison of the quality parameter of the receive signal in each time frame (T) and thereby uses the respective set value (SIRSoll) last notified in one of the preceding timeframes (T−1) with the corresponding information, and
- whose transmitter (BS), when setting its transmit power (P), takes into account a correction value for the set value (SIRSoll) of the quality parameter of the receive signal, in addition to the comparison information (TPC) transferred by the receiver (MS), if the set value (SIRSoll) which is used differs from the set value of the preceding time frame (T−1).
Dependencies are inferred from the claim text.