Method and devices for power control

Abstract

The embodiment of the invention discloses a power control method comprising the following steps: a network side collocates an acknowledgement indicator channel E-HICH on an auxiliary carrier and sendsinformation of the collocated E-HICH; and a receiving terminal calculates instantaneous path loss according to the received information of the E-HICH and performs power control on an enhanced physical uplink channel (E-PUCH) on the auxiliary carrier according to the instantaneous path loss. The embodiment of the invention also discloses a power control device of the network side and a power control device of a user equipment side. The method and the devices can perform power control on the E-PUCH on the auxiliary carrier by only utilizing the collocated E-HICH resource without increasing extra code channel resources, thereby effectively saving network resources while finishing power control.

Description

technical field [0001] The present invention relates to power control technology, in particular to a power control method and device. Background technique [0002] In Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, due to the upgrade of Radio Access Network (RAN) and User Equipment (UE), High Speed ​​Uplink Packet Access (HSUPA) can be supported on primary carrier and secondary carrier services, which can improve the uplink performance and capacity of the system, and increase the competitiveness of the system and equipment. However, while supporting the HSUPA service, the system also needs to control the power of the uplink, so as to reduce the large interference to the local cell and adjacent cells, so as to avoid the performance degradation of the local or the entire network. [0003] At present, when performing power control on the UE through a dedicated physical channel (DPCH), the transmit power (P e-base +L') to perform power control, that ...

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Problems solved by technology

[0010] However, when the UE needs to transmit HSUPA services on the secondary carrier, since there is no PCCPCH on the secondary carrier, the UE will not be able to estimate the instantaneous path loss, and thus cannot perform effective power control on the E-PUCH

In this case, if the UE switches back to the primary carrier and calculates the instantaneous path loss on the secondary carrier based on the PCCPCH on the primary The estimation accuracy of instantaneous path loss will reduce the power control performance; in addition, if a beacon signal such as PCCPCH signal is sent on the secondary carrier, and the instantaneous path loss is estimated based on the beacon signal, the sent beacon signal will be Increase the interference to the time slot TS0 and may occupy additional code channel resources

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