Radio base station device and mobile communication system
First Claim
1. A base transceiver station apparatus comprising:
- an analyzing means for analyzing a header of an IP packet received by the base transceiver station apparatus;
a routing means for transferring said IP packet to another base transceiver station based on a route table when a result of analyzing said header by said analyzing means indicates that said IP packet is not destined for the local base transceiver station, and for transferring said IP packet to a transmitting unit of the local base transceiver station when the result of analyzing said header by said analyzing means indicates that said IP packet is destined for the local base transceiver station; and
said transmitting unit including a means for, when transmitting a packet to a mobile node which is communicating with the local base transceiver station, acquiring a base station control packet sent from an RNC via said routing means, and dividing and converting transmission processing information on said mobile node into plural pieces of information in units of TTI in which information is transferred between L1 and MAC based on said base station control packet, said TTI being equal to a-time interval during which information is transmitted between layers of transport block set, an error correction coding means for inputting said transport blocks into which the transmission processing information is divided and converted, and for error correction coding said transport blocks, a modulating means for inputting the coded data outputted from said error correction coding means, and for modulating the coded data, and a transmitting means for converting digital baseband data which is the modulated, coded data output by said modulation means into an analog baseband signal, for converting a frequency of the analog baseband signal to a transmission carrier frequency, for performing a band limit on the analog baseband signal on the transmission carrier frequency and for amplifying it so that it has desired transmission power, and for separating signals lying within a transmission frequency band and signals lying within a reception frequency band from each other using a duplexer so as to transmit the analog baseband signal on the transmission carrier frequency and having the desired transmission power, as a radio signal, to said mobile node via a transmit/receive antenna.
1 Assignment
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Accused Products
Abstract
When carrying out a downlink handover, a source base transceiver station from which a mobile node is moving receives packets to be transmitted, via a wireless section, to the mobile node from an IP network, and copies and transfers them to a destination base transceiver station to which the mobile node is moving. On the other hand, when carrying out an uplink handover, the source base transceiver station compares the reliability of transport blocks which are received via a wireless section, from the mobile node and which are demodulated and decoded by the local station with that of transport blocks which are received via an IP network, from another base transceiver station and which are demodulated and decoded thereby, packetizes selected transport blocks with a better quality, and transmits them to a communications-partner node according to a route table, thereby implementing distribution of traffic via the IP network.
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Citations
20 Claims
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1. A base transceiver station apparatus comprising:
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an analyzing means for analyzing a header of an IP packet received by the base transceiver station apparatus; a routing means for transferring said IP packet to another base transceiver station based on a route table when a result of analyzing said header by said analyzing means indicates that said IP packet is not destined for the local base transceiver station, and for transferring said IP packet to a transmitting unit of the local base transceiver station when the result of analyzing said header by said analyzing means indicates that said IP packet is destined for the local base transceiver station; and said transmitting unit including a means for, when transmitting a packet to a mobile node which is communicating with the local base transceiver station, acquiring a base station control packet sent from an RNC via said routing means, and dividing and converting transmission processing information on said mobile node into plural pieces of information in units of TTI in which information is transferred between L1 and MAC based on said base station control packet, said TTI being equal to a-time interval during which information is transmitted between layers of transport block set, an error correction coding means for inputting said transport blocks into which the transmission processing information is divided and converted, and for error correction coding said transport blocks, a modulating means for inputting the coded data outputted from said error correction coding means, and for modulating the coded data, and a transmitting means for converting digital baseband data which is the modulated, coded data output by said modulation means into an analog baseband signal, for converting a frequency of the analog baseband signal to a transmission carrier frequency, for performing a band limit on the analog baseband signal on the transmission carrier frequency and for amplifying it so that it has desired transmission power, and for separating signals lying within a transmission frequency band and signals lying within a reception frequency band from each other using a duplexer so as to transmit the analog baseband signal on the transmission carrier frequency and having the desired transmission power, as a radio signal, to said mobile node via a transmit/receive antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A base transceiver station apparatus comprising:
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an analyzing means for analyzing a header of an IP packet received by the local base transceiver station; a routing means for transferring said IP packet to another base transceiver station based on a route table when a result of analyzing said header by said analyzing means indicates that said IP packet is not destined for the local base transceiver station, and for transferring said IP packet to a transmitting unit of the local base transceiver station when the result of analyzing said header by said analyzing means indicates that said IP packet is destined for the local base transceiver station; and said transmitting unit including a means for, when transmitting a packet to a mobile node which is communicating with the local base transceiver station, acquiring a base station control packet sent from an RNC via said routing means, and dividing and converting transmission processing information on said mobile node into plural pieces of information in units of TTI in which information is transferred between L1 and MAC based on said base station control packet, said TTI being equal to a time interval during which information is transmitted between layers of transport block set, an error correction coding means for inputting said transport blocks into which the transmission processing information is divided and converted, and for error correction coding said transport blocks, a modulating means for inputting the coded data outputted from said error correction coding means, and for modulating the coded data, and a transmitting means for converting digital baseband data which is the modulated, coded data output by said modulation means into an analog baseband signal, for converting a frequency of the analog baseband signal to a carrier frequency, for performing a band limit on the analog baseband signal and for amplifying it so that it has desired transmission power, and for separating signals lying within a transmission frequency band and signals lying within a reception frequency band from each other using a duplexer so as to transmit the analog baseband signal having the desired transmission power, as a radio signal, to said mobile node via a transmit/receive antenna, and wherein said means for dividing and converting a packet into transport blocks comprises; a storing means for outputting the divided and converted transport blocks to the error correction coding means at a next stage, and for storing the transport blocks in a temporary memory; another storing means for outputting the transport blocks stored in said temporary memory to the error correction coding means in response to a resending request (NACK) from the mobile node again, and for storing said transport blocks in said temporary memory again; an erasing means for erasing the transport blocks which the mobile node has finished receiving from said temporary memory in response to an acknowledgment signal (ACK) indicating the reception of the packet from said mobile node; a means for, when said mobile node is carrying out a handover to move from a source base transceiver station which is the local base transceiver station to a destination base transceiver station, transferring the packet to the destination base transceiver station; a handover means for, when said mobile node is carrying out a handover to move from a source base transceiver station to a destination base transceiver station and the local base transceiver station is either the source base transceiver station or the destination base transceiver station, performing a handover using SSDT so as to output the packet to the local station'"'"'s error correction coding means when determining that the local base transceiver station is a primary cell, and so as not to output the packet to the local station'"'"'s error correction coding means when determining that the local base transceiver station is a non-primary cell; and a means for transferring the packet to either the local station'"'"'s internal circuit block or the destination base transceiver station regardless of whether a base transceiver station which has transmitted a packet to the mobile node last time is the source base transceiver station or the destination base transceiver station so as to resend the packet in response to said resending request when the local base transceiver station is a primary cell now. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A base transceiver station apparatus comprising:
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an analyzing means for analyzing a header of an IP packet received by the base transceiver station apparatus; a routing means for transferring said IP packet to another base transceiver station based on a route table when a result of analyzing said header by said analyzing means indicates that said IP packet is not destined for the local base transceiver station, and for transferring said IP packet to a transmitting unit of the local base transceiver station when the result of analyzing said header by said analyzing means indicates that said IP packet is destined for the local base transceiver station; and said transmitting unit including a means for, when transmitting a packet to a mobile node which is communicating with the local base transceiver station, acquiring a base station control packet sent from an RNC via said routing means, and dividing and converting transmission processing information on said mobile node into plural pieces of information in units of TTI in which information is transferred between L1 and MAC based on said base station control packet, said TTI being equal to a time interval during which information is transmitted between layers of transport block set, an error correction coding means for inputting said transport blocks into which the transmission processing information is divided and converted, and for error correction coding said transport blocks, a modulating means for inputting the coded data outputted from said error correction coding means, and for modulating the coded data, and a transmitting means for converting digital baseband data which is the modulated, coded data output by said modulation means into an analog baseband signal, for converting a frequency of the analog baseband signal to a carrier frequency, for performing a band limit on the analog baseband signal and for amplifying it so that it has desired transmission power, and for separating signals lying within a transmission frequency band and signals lying within a reception frequency band from each other using a duplexer so as to transmit the analog baseband signal having the desired transmission power, as a radio signal, to said mobile node via a transmit/receive antenna, wherein said means for dividing and converting a packet into transport blocks comprises; a storing means for outputting the divided and converted transport blocks to the error correction coding means at a next stage, and for storing the transport blocks in a temporary memory; another storing means for outputting the transport blocks stored in said temporary memory to the error correction coding means in response to a resending request (NACK) from the mobile node, and for storing said transport blocks in said temporary memory again; an erasing means for erasing the transport blocks which the mobile node has finished receiving from said temporary memory in response to an acknowledgment signal (ACK) indicating the reception of the packet from said mobile node; and a first transferring means for, when said mobile node is carrying out a handover to move from a source base transceiver station which is the local base transceiver station to a destination base transceiver station, transferring the packet to the destination base transceiver station; a handover means for, when said mobile node is carrying out a handover to move from a source base transceiver station to a destination base transceiver station and the local base transceiver station is either the source base transceiver station or the destination base transceiver station, performing a handover using SSDT so as to output the packet to the local station'"'"'s error correction coding means when determining that the local base transceiver station is a primary cell, and so as not to output the packet to the local station'"'"'s error correction coding means when determining that the local base transceiver station is a non-primary cell; and a second transferring means for transferring the packet to either the local station'"'"'s internal circuit block or the destination base transceiver station regardless of whether a base transceiver station which has transmitted a packet to the mobile node last time is the source base transceiver station or the destination base transceiver station so as to resend the packet in response to said resending request when the local base transceiver station is a primary cell now; a means for receiving an MIMO transmission request signal, which is transmitted by said mobile node when receiving cell search signals transmitted by two or more base transceiver stations including the local base transceiver station, each of the two or more cell search signals having reception power which exceeds a predetermined threshold, determining that it can carry out communications with the two or more base transceiver stations simultaneously, and requiring higher-speed packet communications, via the transmit/receive antenna, and for detecting MIMO transmission request data from the error correction decoding means; a means for transferring transport blocks to the two or more base transceiver stations which have transmitted cell search signals having reception power exceeding the predetermined threshold and which have IP addresses respectively corresponding to cell identifiers which are transmitted from the mobile node; a means for deriving parameters required for MIMO transmission including a coding rule, a modulation rule, and a number of pilot symbols for estimation of a transmission route via which data is to be transmitted to the mobile node based on transfer rate information which is included in the detected MIMO transmission request data and which is requested by the mobile node; and a means for, when the local base transceiver station has been communicating with the mobile node since before receiving the MIMO transmission request signal, transferring transport blocks to a cell identifier of the local base transceiver station, and for packetizing the parameters required for MIMO transmission including said encoding rule, said modulation rule, and said number of pilot symbols into packets to transmit them onto an IP network. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification