Communication terminal device, base station device, and transmission power control method
一种发送功率、通信终端的技术，应用在功率管理、选择装置、无线通信等方向，能够解决不满足等问题
Inactive Publication Date: 2005-08-17
PANASONIC CORP
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Problems solved by technology
Therefore, as described above, when the transmission power of the downlink HS-DPCCH decreases as the transmission power of the downlink A-DPCH decreases, the SIR of the downlink HS-DPCCH may not be correct in the communication terminal. Cases where the required SIR is met
[0014] In addition, not only in Fast-UL, but also in HSDPA, the above problems also occur
Method used
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Embodiment Construction
[0028] Embodiments of the present invention will be described below. Figure 4 is a block diagram showing the configuration of a communication terminal device according to one embodiment of the present invention. This communication terminal device is used in a mobile communication system that implements Fast-UL and HSDPA.
[0029] The reception unit 100 is composed of a radio reception unit 14 , a despreading unit 16 , a demodulation unit 18 and a decoding unit 20 .
[0030] The wireless receiving unit 14 performs processes such as frequency down conversion, AGC (Auto Gain Control, automatic gain control) and A / D conversion on the signal received via the antenna 12 . This received signal includes a TPC command for the uplink A-DPCH and an offset between the transmission power of the uplink HS-DPCCH and the transmission power of the uplink A-DPCH. In addition, the communication terminal receives the TPC command from the base station through the A-DPCH in the downlink direction...
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In a wireless communication system operating in a mixed channel environment involving A-DPCH (Associated-Dedicated Physical CHannel) to which soft handover applies and HS-DPCCH (High Speed-Dedicated Physical Control CHannel) to which hard handover applies, in order to keep the received SIR of HS-DPCCH at the required SIR by performing transmission power control for HS-DPCCH appropriately, HO judgment section 30 judges whether A-DPCH is in a soft handover state or not, transmission radio section 42 sets the transmission power of HS-DPCCH into a power equal to the transmission power of A-DPCH when A-DPCH is not in a soft handover state, whereas the transmission power of HS-DPCCH is set at an addition of the transmission power of A-DPCH and an offset when A-DPCH is in a soft handover state.In a radio communication system containing A-DPCH (Associated - Dedicated Physical Channel) to which soft handover is applied and HS-DPCCH (High Speed - Dedicated Physical Control Channel) to which hard handover is applied, it is possible to perform an appropriate transmission power control for the HS-DPCCH and maintain reception SIR of the HS-DPCCH at a predetermined SIR. An HO judgment section (30) judges whether the A-DPCH is in the soft handover state. When the A-DPCH is not in the soft handover state, a transmission radio section (42) sets the HS-DPCCH transmission power to power equal to the A-DPCH transmission power. When the A-DPCH is in the soft handover state, the transmission radio section (42) sets the HS-DPCCH transmission power to the A-DPCH transmission power added by an offset.
Description
technical field [0001] The present invention relates to a communication terminal device, a base station device, and a transmission power control method Background technique [0002] In the field of wireless communication systems, HSDPA (High Speed Downlink Packet Access) has been proposed, which shares a high-speed and large-capacity downlink channel with multiple communication terminals to perform high-speed packet transmission through the downlink Technology. Also, recently, a technique for increasing an uplink packet transmission rate (hereinafter, this technique will be referred to as Fast-UL (Fast-Uplink) in this specification) is being studied. In HSDPA, such as HS-PDSCH (High Speed-Physical Downlink Shared Channel, high-speed physical downlink shared channel), A-DPCH (Associated-Dedicated Physical Channel, with dedicated physical channel), HS-DPCCH (High Speed-Dedicated Physical Control Channel, high-speed dedicated physical control channel) and other channels. I...
Claims
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IPC IPC(8): H04B7/26H04B7/005H04W52/04H04W52/28H04W52/40
CPCH04W52/286H04W52/04H04W52/40
Inventor 西尾昭彦
Owner PANASONIC CORP