Base station apparatus of mobile communication system
First Claim
1. A communication system comprising a first communication apparatus and a second communication apparatus, whereinthe first communication apparatus comprises:
- reception means for receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the second communication apparatus from the second communication apparatus;
first control means for carrying out transmission power control of the first communication apparatus in accordance with a predetermined control pattern before the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, the predetermined control pattern being fixed and invariable; and
second control means for carrying out transmission power control of the first communication apparatus in accordance with the transmission power control information received from the second communication apparatus after the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, andthe second communication apparatus comprises;
transmission means for transmitting the transmission power control information which is based on SIR measurement results in the second communication apparatus to the first communication apparatus.
2 Assignments
0 Petitions
Accused Products
Abstract
A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
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Citations
32 Claims
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1. A communication system comprising a first communication apparatus and a second communication apparatus, wherein
the first communication apparatus comprises: -
reception means for receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the second communication apparatus from the second communication apparatus; first control means for carrying out transmission power control of the first communication apparatus in accordance with a predetermined control pattern before the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, the predetermined control pattern being fixed and invariable; and second control means for carrying out transmission power control of the first communication apparatus in accordance with the transmission power control information received from the second communication apparatus after the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, and the second communication apparatus comprises; transmission means for transmitting the transmission power control information which is based on SIR measurement results in the second communication apparatus to the first communication apparatus. - View Dependent Claims (2, 3, 4)
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5. A communication apparatus comprising:
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reception means for receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in another communication apparatus; first control means for carrying out transmission power control of the communication apparatus in accordance with a predetermined control pattern before the communication apparatus becomes able to receive the transmission power control information from the another communication apparatus, the predetermined control pattern being fixed and invariable; and second control means for carrying out transmission power control of the communication apparatus in accordance with the transmission power control information received from the another communication apparatus after the communication apparatus becomes able to receive the transmission power control information from the another communication apparatus. - View Dependent Claims (6, 7, 8)
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9. A communication system comprising a first communication apparatus and a second communication apparatus, wherein
the first communication apparatus comprises: -
first transmission means for transmitting transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the first communication apparatus to the second communication apparatus; and second transmission means for transmitting information regarding an initial value of transmission power of the second communication apparatus to the second communication apparatus, and the second communication apparatus comprises; first reception means for receiving the transmission power control information which is based on SIR measurement results in the first communication apparatus from the first communication apparatus; control means for carrying out transmission power control of the second communication apparatus in accordance with the transmission power control information received from the first communication apparatus after the second communication apparatus becomes able to receive the transmission power control information from the first communication apparatus; and second reception means for receiving the information regarding the initial value of the transmission power from the first communication apparatus, and wherein the control means sets an initial value of transmission power of the second communication apparatus in accordance with the information regarding the initial value of the transmission power and starts the transmission power control with the initial value. - View Dependent Claims (10, 11)
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12. A communication apparatus comprising:
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first reception means for receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in another communication apparatus; control means for carrying out transmission power control of the communication apparatus in accordance with the transmission power control information received from the another communication apparatus after the communication apparatus becomes able to receive the transmission power control information from the another communication apparatus; and second reception means for receiving information regarding an initial value of transmission power of the communication apparatus, wherein the control means sets an initial value of transmission power of the communication apparatus in accordance with the information regarding the initial value of the transmission power and starts the transmission power control with the initial value. - View Dependent Claims (13)
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14. A communication apparatus comprising:
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first transmission means for transmitting transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the communication apparatus to another communication apparatus; and second transmission means for transmitting information regarding an initial value of transmission power of the another communication apparatus to said another communication apparatus, wherein the first transmission means transmits transmission power control information for regularly raising the transmission power of the another communication apparatus instead of the transmission power control information based on SIR measurement results before said communication apparatus becomes able to synchronize with a signal from said another communication apparatus. - View Dependent Claims (15, 16)
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17. A communication method at a communication system comprising a first communication apparatus and a second communication apparatus, comprising:
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a transmission step of transmitting, at the second communication apparatus, transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the second communication apparatus to the first communication apparatus; a first control step of carrying out, at the first communication apparatus, transmission power control of the first communication apparatus in accordance with a predetermined control pattern before the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, the predetermined control pattern being fixed and invariable; a reception step of receiving, at the first communication apparatus, the transmission power control information which is based on SIR measurement results in the second communication apparatus from the second communication apparatus; and a second control step of carrying out, at the first communication apparatus, transmission power control of the first communication apparatus in accordance with the transmission power control information received from the second communication apparatus after the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus. - View Dependent Claims (18, 19, 20)
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21. A communication method at a communication apparatus, comprising:
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a reception step of receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in another communication apparatus from the another communication apparatus; a first control step of carrying out transmission power control of the communication apparatus in accordance with a predetermined control pattern before the communication apparatus becomes able to receive the transmission power control information from the another communication apparatus, the predetermined control pattern being fixed and invariable; and a second control step of carrying out transmission power control of the communication apparatus in accordance with the transmission power control information received from the another communication apparatus after the communication apparatus becomes able to receive the transmission power control information from the another communication apparatus. - View Dependent Claims (22, 23, 24)
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25. A communication method at a communication system comprising a first communication apparatus and a second communication apparatus, comprising:
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a first transmission step of transmitting, at the first communication apparatus, transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the first communication apparatus to the second communication apparatus; a second transmission step of transmitting, at the first communication apparatus, information regarding an initial value of transmission power of the second communication apparatus to the second communication apparatus; a first reception step of receiving, at the second communication apparatus, the transmission power control information which is based on SIR measurement results in the first communication apparatus from the first communication apparatus; a second reception step of receiving, at the second communication apparatus, the information regarding the initial value of the transmission power from the first communication apparatus; and a control step of carrying out, at the second communication apparatus, transmission power control of the second communication apparatus in accordance with the transmission power control information received from the first communication apparatus after the second communication apparatus becomes able to receive the transmission power control information from the first communication apparatus, wherein the control step sets an initial value of transmission power of the second communication apparatus in accordance with the information regarding the initial value of the transmission power and starts the transmission power control with the initial value. - View Dependent Claims (26, 27)
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28. A communication method at a communication apparatus, comprising:
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a first reception step of receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in another communication apparatus; a control step of carrying out transmission power control of the communication apparatus in accordance with the transmission power control information received from the another communication apparatus after the communication apparatus becomes able to receive the transmission power control information from the another communication apparatus; and a second reception step of receiving information regarding an initial value of transmission power of the communication apparatus, wherein the control step sets an initial value of transmission power of the communication apparatus in accordance with the information regarding the initial value of the transmission power and starts the transmission power control with the initial value. - View Dependent Claims (29)
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30. A communication method at a first communication apparatus, comprising:
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a first transmission step of transmitting transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the first communication apparatus to a second communication apparatus; and a second transmission step of transmitting information regarding an initial value of transmission power of the second communication apparatus to the second communication apparatus, wherein the first transmission step transmits transmission power control information for regularly raising the transmission power of the second communication apparatus instead of the transmission power control information based on SIR measurement results before the first communication apparatus becomes able to synchronize with a signal from the second communication apparatus. - View Dependent Claims (31, 32)
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Specification