WO2007063546A2 - Novel distributed base station architecture - Google Patents

Novel distributed base station architecture Download PDF

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Publication number
WO2007063546A2
WO2007063546A2 PCT/IL2006/001383 IL2006001383W WO2007063546A2 WO 2007063546 A2 WO2007063546 A2 WO 2007063546A2 IL 2006001383 W IL2006001383 W IL 2006001383W WO 2007063546 A2 WO2007063546 A2 WO 2007063546A2
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WIPO (PCT)
Prior art keywords
data signal
signal
protocol
generating
coupled
Prior art date
Application number
PCT/IL2006/001383
Other languages
French (fr)
Other versions
WO2007063546A3 (en
Inventor
Tuvia Apelewicz
Zohar Zeev Barzilai
Original Assignee
Tuvia Apelewicz
Zohar Zeev Barzilai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Tuvia Apelewicz, Zohar Zeev Barzilai filed Critical Tuvia Apelewicz
Priority to EP06821603A priority Critical patent/EP1966918A2/en
Priority to JP2008542941A priority patent/JP2009526421A/en
Priority to US12/093,596 priority patent/US20090296632A1/en
Publication of WO2007063546A2 publication Critical patent/WO2007063546A2/en
Priority to IL191757A priority patent/IL191757A/en
Publication of WO2007063546A3 publication Critical patent/WO2007063546A3/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Definitions

  • This invention relates to cellular networks and more particularly to a method and apparatus using a multiplexer (MUX) and a de-multiplexer (DEMUX) to combine signals from multiple spatially placed base stations for overcoming deployment barriers, and for mobile coverage enhancement.
  • MUX multiplexer
  • DEMUX de-multiplexer
  • Deployment for mobile coverage of, third generation and beyond, cellular networks includes having a core network that is connected to base-station- controllers (BSC).
  • BSC base-station- controllers
  • the BSC also known as radio-network-controller (RNC)
  • RNC radio-network-controller
  • Each base station contains at least one sector, and each sector connects to and controls cellular phones that are within its radio coverage area.
  • the communication channel between the base-station-controller and each base station is unique and dedicated to said base station and will be referred herein to as lub communication channel.
  • the lub communication channel enables the exchange of control, management, and traffic data between the base station and the base-station-controller.
  • the base-station-controller has limited resources and can control only limited amount of individual base stations. Thus a problem exists in deploying a base-station-controller that controls a massive amount of base stations.
  • a general object of the invention is a distributed base station cellular network having a multiplexer (MUX) for combining several base stations lub channels into one base-station-controller lub channel, and a de-multiplexer (DEMUX) for the distribution of one base-station-controller lub channel onto several base stations lub channels, thus enhancing the capacity of the base-station- controller.
  • MUX multiplexer
  • DEMUX de-multiplexer
  • a novel distributed base station architecture comprising a DEMUX, a base station sector transmitter, a base station sector receiver, and a MUX.
  • the DEMUX include? a network-interface device, delay device, address-generator device, and an internet-protocol-interface device.
  • the network-interface device receives the base-station-controller-demux (BSCDIub) data signal from the base-station-controller and generates the demultiplexer-lub-transport-block (DlubTB) data signal.
  • BSCDIub base-station-controller-demux
  • DlubTB demultiplexer-lub-transport-block
  • the delay device delays the DlubTB data signal and generates the deiayed-demux-lub-transport-block (DDIubTB).
  • the address- generator device generates the Internet-protocol-ZCell-address (IPZAD) data signal.
  • IPZAD Internet-protocol-ZCell-address
  • the internet-protocol-interface device combines IPZAD signal and DDIubTB signal and generates the ZCell-tub-over-i ⁇ ternet-protocol (ZlublP) data signal.
  • the ZCeII transmitter includes an internet-protocol-interface device, a processor, channel-element means, a radio-frequency-up-converter, a power amplifier, a combiner, and an antenna.
  • the f ⁇ ter ⁇ et-pr ⁇ t ⁇ c ⁇ l-interface device receives the ZlublP data signal and generates the ZCell-lub-transport-block- data (ZlubTBD) signal.
  • the processor generates the transmitted-trafl ⁇ c-data (TTD) signal.
  • the channel-element means generate the transmitted-base-band- modulated-traffic-data (TBBMTD) signal.
  • the radio-frequency-up-converter generates the transmitted-radio-frequency-modulated-traffic-data (TRFMTD) signal.
  • the power-amplifier generates the amplified-transmitted- radio-frequency-modulated-traffic-data (ATRFMTD) signal.
  • the combiner filters the ATRFMTD signal and generates the filtered-amplified-tra ⁇ smitted-radio- frequency-modulated-traffic-data (FATRFMTD) signal.
  • the antenna radiates the FATRFMTD signal over a communication channel.
  • the ZCeII receiver includes an antenna, a combiner, a radio-frequency-down- converter (RFDC) device, channel-element means, a processor, and an internet-protocol-interface device.
  • the antenna couples the ZCeII receiver to the communication channel.
  • the combiner separates the received-radio- frequency-modulated-traffic-data (RRFMTD) signal from other non receiver out- of-band signals and outputs the filtered-received-radio-frequency-modulated- traffic-data (FRRFMTD) signal to the radio-frequency-down-converter (RFDC) device.
  • the RFDC generates the received-base-band-modulated-traffic-data (RBBMTD) signal.
  • the channel-element means generate the received-traffic- data (RTD) signal.
  • the processor generates the lub-transport-block (lubTB) data signal.
  • the internet-profocof-interface device adds internet protocol packets overhead and framing to the lubTB data signal, and generates the mux-lub-over-lntemet-protocol (MlublP) data signal.
  • the MUX includes an internet-protocol-interface device, delay device, combiner, and a network-interface device.
  • the internet-protocol-interface device receives the MlublP data signal from the lub communication channel and generates the mux-lub-transport-block (MlubTB) data signal.
  • the delay device generates the delayed-mux-lub-transport-block (DMIubTB) data signal.
  • the combiner linearly combines DMfubTB data signals to generate the combined-lub-transport-block (ClubTB) data signal.
  • the network-interface device generates the base-station-co ⁇ troller-mux-lub (BSCMIub) data signal.
  • BSCMIub base-station-co ⁇ troller-mux-lub
  • Figure 1 is a block diagram of the DEMUX device.
  • FIG. 2 is a block diagram of the ZCeII transmitter
  • Figure 3 is a block diagram of the MUX with combiner
  • Figure 4 is a block diagram of the ZCeII receiver
  • Figure 5 is a block diagram of the distributed base station
  • Figure 6 is a block diagram of the combiner circuit
  • Figure 7 is a frame format of the combiner output.
  • the present invention provides a novel distributed base station architecture including a DEMUX and MUX for use in cellular systems.
  • the novel base station architecture includes one ore more base stations, one or more DEMUXES, and one or more MUXES.
  • the following discussion focuses on a base station, a DEMUX and a MUX, with the understanding that multiple base stations, multiple DEMUXES, and multiple MUXES can be used in a system.
  • the DEMUX 40 includes a network-interface device 1, a delay device 2, address-generator device 3, and an internet-protocol-interface device 4.
  • the base-station-controller 17 is coupled to the network-interface device 1 as shown in Figure 5.
  • the network-interface 1 is coupled to the delay device 2.
  • the internet-protocol-interface device 4 is coupled to the address-generator device 3 and to the delay device 2.
  • the network-interface device 1 receives base-station-controller-demux-lub data from the base-station-controller 17.
  • the main function of the network- interface device 1 is to terminate the communication channel with the base- station-controller 17.
  • the physical communication channel, between the network-interface device 1 and the base-station-controller 17, and the associated protocols are well known in the art, and as such so is the network- interface device 1.
  • the network-interface device 1 generates demultiplexer-lub- transport-block (DlubTB) data signal.
  • the delay device 2 delays in time said DlubTB data signal and generates the demultrplexer-delayed-Iub-transport- block (DDIubTB) data signal.
  • the address-generator 3 retrieves the destination ZCeII internet protocol (IP) address and generates the intemet-protocol-ZCell-address (IPZAD) data signal.
  • IP internet protocol
  • IPZAD intemet-protocol-ZCell-address
  • the address-generator device 3 may include shift registers with appropriate taps, as is well known in the art, for generating the particular address data signal.
  • the address- generator device 3 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASfCs, and their use, are weft known in the art.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • the address-generator device 3 alternatively may include a memory for storing the intemet-protocol-ZCell-address data signal, and outputting the internet- protocol-ZCell-address data signal.
  • the memory may be constructed from discrete components, or as part of a DSP or ASfC.
  • the present invention may have more than one address-generator device 3 so that said demultiplexed-delayed-lub-transport-block data signal can be delivered to more than one ZCeII transmitters.
  • the intemet-protocol-interface device 4 combines said internet-protocof- ZCell-address to said demultiplexer-delayed-lub-transport-block data signal and generates the ZCell-lub-internet-protocol (ZlublP) data signal intended for the destination ZCeII.
  • the main function of said internet-protoc ⁇ l-interface device 4 is to terminate the internet protocol (IP) communication channel between said DEMUX 40 and the ZCeII transmitter 50.
  • IP internet protocol
  • the ZCeII transmitter 50 includes an internet-protocol- interface device 9, a processor 11 , channel-element means 10, a radio- frequency-up-converter device 12, a power amplifier 30, a combiner 13, and a transmitter antenna 14.
  • the internet-protocol-interface device 9 is coupled to the processor 11.
  • the processor 11 is coupled to channel-element means 10.
  • the channel-element means 10 is coupled to the radio-frequency-up-converter device 12.
  • the radio-frequency-up-converter 12 is coupled to the power amplifier 30.
  • the transmitter antenna 14 is coupled through the combiner 13 to the power amplifier 30.
  • the internet-protocol-interface device 9 receives said ZCell-lub-over-intemet-protocol (ZlublP) data signal and generates the ZCeII- lub-transport-block-data (ZlubTBD) signal.
  • the main function of the internet- protocol-interface device 9 is to terminate the internet protocol (IP) communication channel between the ZCeII transmitter 50 and said DEMUX 40.
  • IP internet protocol
  • the internet protocol (IP) communication channel is well known in the art, and as such so is said internet-protocoMnterface device 9.
  • the processor 11 generates the transmitted-traffic-data (TTD) signal.
  • the processor 11 may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • the processor 11 may include a memory for storing ZCeII transmitter 50 control functions.
  • the memory may be constructed from discrete components, or as part of a DSP or ASIC.
  • the channel-element means 10 main function is to generate a modulated base-band-spread- spectrum signal according to third generation standards which are well known in the art.
  • a single channel-element means is defined in the art as the processing power needed to maintain a single voice communications session.
  • the channel-element means 10 generates the transmitted-base-band- modulated-traffic-data (TBBMTD) signal.
  • TBBMTD transmitted-base-band- modulated-traffic-data
  • the channel-element means 10 may include shift registers with appropriate taps, as is well known in the art, for generating said TBBMTD signal.
  • the channel-element means 10 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art.
  • the channel-element means 10 alternatively may include a memory. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
  • the radio-frequency-up-converter (RFUC) device 12 generates the transmitter-radio-frequency-modulated-traffic-data (TRFMTD) signal.
  • the radio- frequency-up-converter device 12 is well known in the art.
  • the power-amplifier 30 amplifies said TRFMTD signal and generates the amplified-transmitted-radio-frequency-modulated-traffic-data (ATRFMTD) signal.
  • the combiner 13 filters said ATRFMTD signal and generates the filtered-amplified-transmitted-radio-frequency-modulated-traffic-data (FATRFMTD) signal.
  • the output of combiner 13 is radiated by the transmitter antenna 14, which sends said FATRFMTD signal over a communication channel.
  • the ZCeII receiver 70 includes a receiver antenna 71 , a combiner 72, a radio-frequency-down-converter device 15, channel-element means 16, a processor 73, and an internet-protocol-interface device 17.
  • the receiver antenna 71 is coupled through the combiner 72 to the radio-frequency- down-converter 15.
  • the radio-frequency-down-converter 15 is coupled to channel-element means 16.
  • the channel-element means 16 is coupled to processor 73.
  • the processor 73 is coupled to the internet-protocol-interface device 17.
  • the receiver antenna 71 couples the ZCeII receiver 70 to the commumcatton channel.
  • the combiner 72 separates the received-radio-frequency-modulated- traffic-data (RRFMTD) signal from other non receiver out-of-band signals and outputs the filtered-received-radio-frequency-modulated-traffic-data
  • RRFMTD received-radio-frequency-modulated- traffic-data
  • FRRFMTD radio-frequency-down-converter
  • RFDC radio-frequency-down-converter
  • the radio-frequency-down-converter device 15 generates the received-base- band-modulated-traffic-data (RBBMTD) signal.
  • the radio-frequency-down- converter device 15 is well known in the art.
  • the channel-element means 16 main function is to demodulate a base-band-spread-spectrum signal according to third generation standards which are well known in the art.
  • a single channel- element means is defined in the art as the processing power needed to maintain a single voice communications session.
  • the channel-element means 16 generate the received-traffic-data (RTD) signal.
  • the channel-element means 16 may include shift registers with appropriate taps, as is well known in the art, for demodulating said RBBMTD signal.
  • the channel-element means 16 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art.
  • the channel-element means 16 alternatively may include a memory. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
  • the processor 73 generates the lub-transport-block (lubTB) data signal.
  • the processor 73 may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art.
  • the processor 73 may include a memory for storing ZCeII receiver 70 control functions. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
  • the internet-protocol-interface device 17 adds internet protocol packets overhead and framing to said lubTB data signal, and generates the mux-lub- over-lnternet-protocol (MlublP) data signal.
  • the main function of the internet- protocol- ⁇ nterface device 17 is to transmit over the internet protocol (IP) communication channel between the ZCeII receiver 70 and the MUX 60.
  • IP internet protocol
  • the MUX 60 includes an internet-protocol-interface device 5, a delay device 6, a combiner 7, and a network-interface device 8.
  • the internet-protocol- rnterface device 5 receives said MlubfP data signal from said ZCeII receiver device 70 over the lub communication channel.
  • the main function of the internet-protocol-interface device 5 is to terminate the internet protocol (IP) communication channel between the MUX 60 and said ZCeII receiver 70, and to generate the mux-lub-transp ⁇ rt-bfock (MlubTB) data signal.
  • IP internet protocol
  • the internet protocol (IP) communication channel is well known in the art, and as such so is the internet-protocol-interface device 5.
  • the delay device 6 delays in time said MlubTB data signal and generates the delayed-mux-lub-transport-block (DMIubTB) data signal.
  • the delay device 6 may include shift registers with appropriate taps, as is well known in the art, for delaying in time said MlubTB data signal.
  • the delay device 6 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art.
  • the delay device 6 alternatively may include a memory.
  • the memory may be constructed from discrete components, or as part of a DSP or ASIC.
  • Combiner 7 receives said DMIubTB data signal and generates the combined- lub-transport-block (ClubTB) data signal.
  • the present invention may include additional delay devices for delaying additional said MIuTB data signals that are associated with a multitude of ZCeII receiver devices.
  • the invention may include up to n delay devices as shown in Figures 5 & 6.
  • Combiner 7 is coupled to delay devices 22, 23, and 24 as shown in Figure 6.
  • the internet-protocol-interface device 5 receives the mux-lub-ove-internet- protocoM (MlublPI) data signal generated by ZCeIl #1 device 18 and generates the mux-lub-transport-block-1 (MlubTBI) data signal.
  • the internet- protocol-interface device 5 also receives the mux-lub-ove-internet-protocol-2 (MlublP2) data signal generated by ZCeII #2 device 19 and generates the mux- fub-transport-bl ⁇ ck-2 (MlubTB2) data signal.
  • the internet-protocol-interface device 5 also receives the mux-lub-ove-intemet-protocol-n (MlublPn) data signal generated by ZCeII #n device 20 and generates the mux-lub-transport- block-n (MlubTBn) data signal.
  • Delay device 22 receives said MlubTBI data signal and generates the delayed-mux-lub-transport-1 (DMIubTBI) data signal.
  • Delay device 23 receives said MlubTB2 data signal and generates the delayed- mux-lub-transport-2 (DMIubTB2) data signal.
  • Delay device 24 receives said MlubTBn data signal and generates the delayed-mux-lub-transport-n (DMIubTBn) data signal.
  • Combiner 7 generates the combined- ⁇ ub-transport- block (ClubTB) data signal.
  • the said ClubTB data signal frame and content is shown in Figure 7.
  • the network-interface device 8 generates the base-station-controller-mux-lub (BSCMlub) data signal.
  • the main function of the network-interface device 8 is to terminate the communication channel with the base-station-controller 17.
  • the physical communication channel, between the network-interface device 8 and the base-station-controller 17, and the associated protocols are well known in the art, and as such so is the network-interface device 8.

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Abstract

A novel distributed base station architecture having a multiplexer. The base station transmits base station controller interface data over an internet protocol (IP) communication channel. The multiplexer receives the data and combines it with other base station controller interface data to form a single base station controller interface data signal.

Description

NOVEL DISTRIBUTED BASE STATION ARCHITECTURE
BACKGROUND OF THE INVENTION
This invention relates to cellular networks and more particularly to a method and apparatus using a multiplexer (MUX) and a de-multiplexer (DEMUX) to combine signals from multiple spatially placed base stations for overcoming deployment barriers, and for mobile coverage enhancement.
DESCRIPTION OF THE RELEVANTART
Deployment for mobile coverage of, third generation and beyond, cellular networks includes having a core network that is connected to base-station- controllers (BSC). The BSC, also known as radio-network-controller (RNC), is connected to, and controls, a multitude of base stations. Each base station contains at least one sector, and each sector connects to and controls cellular phones that are within its radio coverage area. The communication channel between the base-station-controller and each base station is unique and dedicated to said base station and will be referred herein to as lub communication channel. The lub communication channel enables the exchange of control, management, and traffic data between the base station and the base-station-controller. The base-station-controller has limited resources and can control only limited amount of individual base stations. Thus a problem exists in deploying a base-station-controller that controls a massive amount of base stations.
SUMMARY OF INVENTION
A general object of the invention is a distributed base station cellular network having a multiplexer (MUX) for combining several base stations lub channels into one base-station-controller lub channel, and a de-multiplexer (DEMUX) for the distribution of one base-station-controller lub channel onto several base stations lub channels, thus enhancing the capacity of the base-station- controller.
According to the present invention, as embodied and broadly described herein, a novel distributed base station architecture is provided comprising a DEMUX, a base station sector transmitter, a base station sector receiver, and a MUX. We will refer herein to each base station sector as ZCeII. The DEMUX include? a network-interface device, delay device, address-generator device, and an internet-protocol-interface device. The network-interface device receives the base-station-controller-demux (BSCDIub) data signal from the base-station-controller and generates the demultiplexer-lub-transport-block (DlubTB) data signal. The delay device delays the DlubTB data signal and generates the deiayed-demux-lub-transport-block (DDIubTB). The address- generator device generates the Internet-protocol-ZCell-address (IPZAD) data signal. The internet-protocol-interface device combines IPZAD signal and DDIubTB signal and generates the ZCell-tub-over-iπternet-protocol (ZlublP) data signal.
The ZCeII transmitter includes an internet-protocol-interface device, a processor, channel-element means, a radio-frequency-up-converter, a power amplifier, a combiner, and an antenna. The fπterπet-prαtσcσl-interface device receives the ZlublP data signal and generates the ZCell-lub-transport-block- data (ZlubTBD) signal. The processor generates the transmitted-traflϊc-data (TTD) signal. The channel-element means generate the transmitted-base-band- modulated-traffic-data (TBBMTD) signal. The radio-frequency-up-converter (RFUC) generates the transmitted-radio-frequency-modulated-traffic-data (TRFMTD) signal. The power-amplifier generates the amplified-transmitted- radio-frequency-modulated-traffic-data (ATRFMTD) signal. The combiner filters the ATRFMTD signal and generates the filtered-amplified-traπsmitted-radio- frequency-modulated-traffic-data (FATRFMTD) signal. And the antenna radiates the FATRFMTD signal over a communication channel.
The ZCeII receiver includes an antenna, a combiner, a radio-frequency-down- converter (RFDC) device, channel-element means, a processor, and an internet-protocol-interface device. The antenna couples the ZCeII receiver to the communication channel. The combiner separates the received-radio- frequency-modulated-traffic-data (RRFMTD) signal from other non receiver out- of-band signals and outputs the filtered-received-radio-frequency-modulated- traffic-data (FRRFMTD) signal to the radio-frequency-down-converter (RFDC) device. The RFDC generates the received-base-band-modulated-traffic-data (RBBMTD) signal. The channel-element means generate the received-traffic- data (RTD) signal. The processor generates the lub-transport-block (lubTB) data signal. The internet-profocof-interface device adds internet protocol packets overhead and framing to the lubTB data signal, and generates the mux-lub-over-lntemet-protocol (MlublP) data signal.
The MUX includes an internet-protocol-interface device, delay device, combiner, and a network-interface device. The internet-protocol-interface device receives the MlublP data signal from the lub communication channel and generates the mux-lub-transport-block (MlubTB) data signal. The delay device generates the delayed-mux-lub-transport-block (DMIubTB) data signal. The combiner linearly combines DMfubTB data signals to generate the combined-lub-transport-block (ClubTB) data signal. The network-interface device generates the base-station-coηtroller-mux-lub (BSCMIub) data signal.
Additional objects and advantages of the invention are set forth in part in the description which follows, and in part are obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention also may be realized and attained by rheans of the instrumentalities and combinations particularly pointed out in the appended claims.
BRIEF DESCRIPTfON OF DRAWINGS
The accompanying drawings, which are incorporated in and constitute a part of the specifications, illustrate preferred embodiments of the invention, and together with the description serve to explain the principles of the invention. Wherein like reference numbers indicate like elements in the several views.
Figure 1 is a block diagram of the DEMUX device.
Figure 2 is a block diagram of the ZCeII transmitter;
Figure 3 is a block diagram of the MUX with combiner; Figure 4 is a block diagram of the ZCeII receiver; Figure 5 is a block diagram of the distributed base station; Figure 6 is a block diagram of the combiner circuit; and Figure 7 is a frame format of the combiner output.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Reference now is made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings.
The present invention provides a novel distributed base station architecture including a DEMUX and MUX for use in cellular systems. The novel base station architecture includes one ore more base stations, one or more DEMUXES, and one or more MUXES. The following discussion focuses on a base station, a DEMUX and a MUX, with the understanding that multiple base stations, multiple DEMUXES, and multiple MUXES can be used in a system.
DEMUX
The DEMUX 40 includes a network-interface device 1, a delay device 2, address-generator device 3, and an internet-protocol-interface device 4. The base-station-controller 17 is coupled to the network-interface device 1 as shown in Figure 5. The network-interface 1 is coupled to the delay device 2. The internet-protocol-interface device 4 is coupled to the address-generator device 3 and to the delay device 2.
The network-interface device 1 receives base-station-controller-demux-lub data from the base-station-controller 17. The main function of the network- interface device 1 is to terminate the communication channel with the base- station-controller 17. The physical communication channel, between the network-interface device 1 and the base-station-controller 17, and the associated protocols are well known in the art, and as such so is the network- interface device 1. The network-interface device 1 generates demultiplexer-lub- transport-block (DlubTB) data signal. The delay device 2 delays in time said DlubTB data signal and generates the demultrplexer-delayed-Iub-transport- block (DDIubTB) data signal. The address-generator 3, as shown in Figure 1 , retrieves the destination ZCeII internet protocol (IP) address and generates the intemet-protocol-ZCell-address (IPZAD) data signal. The address-generator device 3 may include shift registers with appropriate taps, as is well known in the art, for generating the particular address data signal. The address- generator device 3 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASfCs, and their use, are weft known in the art. The address-generator device 3 alternatively may include a memory for storing the intemet-protocol-ZCell-address data signal, and outputting the internet- protocol-ZCell-address data signal. The memory may be constructed from discrete components, or as part of a DSP or ASfC.
The present invention may have more than one address-generator device 3 so that said demultiplexed-delayed-lub-transport-block data signal can be delivered to more than one ZCeII transmitters.
The intemet-protocol-interface device 4 combines said internet-protocof- ZCell-address to said demultiplexer-delayed-lub-transport-block data signal and generates the ZCell-lub-internet-protocol (ZlublP) data signal intended for the destination ZCeII. The main function of said internet-protocόl-interface device 4 is to terminate the internet protocol (IP) communication channel between said DEMUX 40 and the ZCeII transmitter 50. The internet protocol (IP) communication channel is well known in the art, and as such so is said internet- protocol-interface device 4.
ZCeII Transmitter
The ZCeII transmitter 50, as shown in Figure 2, includes an internet-protocol- interface device 9, a processor 11 , channel-element means 10, a radio- frequency-up-converter device 12, a power amplifier 30, a combiner 13, and a transmitter antenna 14. The internet-protocol-interface device 9 is coupled to the processor 11. The processor 11 is coupled to channel-element means 10. The channel-element means 10 is coupled to the radio-frequency-up-converter device 12. The radio-frequency-up-converter 12 is coupled to the power amplifier 30. The transmitter antenna 14 is coupled through the combiner 13 to the power amplifier 30. The internet-protocol-interface device 9 receives said ZCell-lub-over-intemet-protocol (ZlublP) data signal and generates the ZCeII- lub-transport-block-data (ZlubTBD) signal. The main function of the internet- protocol-interface device 9 is to terminate the internet protocol (IP) communication channel between the ZCeII transmitter 50 and said DEMUX 40. The internet protocol (IP) communication channel is well known in the art, and as such so is said internet-protocoMnterface device 9. The processor 11 generates the transmitted-traffic-data (TTD) signal. The processor 11 may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art. The processor 11 may include a memory for storing ZCeII transmitter 50 control functions. The memory may be constructed from discrete components, or as part of a DSP or ASIC. The channel-element means 10 main function is to generate a modulated base-band-spread- spectrum signal according to third generation standards which are well known in the art. A single channel-element means is defined in the art as the processing power needed to maintain a single voice communications session. The channel-element means 10 generates the transmitted-base-band- modulated-traffic-data (TBBMTD) signal. The channel-element means 10 may include shift registers with appropriate taps, as is well known in the art, for generating said TBBMTD signal. The channel-element means 10 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art. The channel-element means 10 alternatively may include a memory. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
The radio-frequency-up-converter (RFUC) device 12 generates the transmitter-radio-frequency-modulated-traffic-data (TRFMTD) signal. The radio- frequency-up-converter device 12 is well known in the art. The power-amplifier 30 amplifies said TRFMTD signal and generates the amplified-transmitted-radio-frequency-modulated-traffic-data (ATRFMTD) signal. The combiner 13 filters said ATRFMTD signal and generates the filtered-amplified-transmitted-radio-frequency-modulated-traffic-data (FATRFMTD) signal. The output of combiner 13 is radiated by the transmitter antenna 14, which sends said FATRFMTD signal over a communication channel.
ZCeII Receiver
The ZCeII receiver 70, as shown in Figure 4, includes a receiver antenna 71 , a combiner 72, a radio-frequency-down-converter device 15, channel-element means 16, a processor 73, and an internet-protocol-interface device 17. The receiver antenna 71 is coupled through the combiner 72 to the radio-frequency- down-converter 15. The radio-frequency-down-converter 15 is coupled to channel-element means 16. The channel-element means 16 is coupled to processor 73. The processor 73 is coupled to the internet-protocol-interface device 17.
The receiver antenna 71 couples the ZCeII receiver 70 to the commumcatton channel. The combiner 72 separates the received-radio-frequency-modulated- traffic-data (RRFMTD) signal from other non receiver out-of-band signals and outputs the filtered-received-radio-frequency-modulated-traffic-data
(FRRFMTD) signal to the radio-frequency-down-converter (RFDC) device 15. The radio-frequency-down-converter device 15 generates the received-base- band-modulated-traffic-data (RBBMTD) signal. The radio-frequency-down- converter device 15 is well known in the art. The channel-element means 16 main function is to demodulate a base-band-spread-spectrum signal according to third generation standards which are well known in the art. A single channel- element means is defined in the art as the processing power needed to maintain a single voice communications session. The channel-element means 16 generate the received-traffic-data (RTD) signal. The channel-element means 16 may include shift registers with appropriate taps, as is well known in the art, for demodulating said RBBMTD signal. The channel-element means 16 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art. The channel-element means 16 alternatively may include a memory. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
The processor 73 generates the lub-transport-block (lubTB) data signal. The processor 73 may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art. The processor 73 may include a memory for storing ZCeII receiver 70 control functions. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
The internet-protocol-interface device 17 adds internet protocol packets overhead and framing to said lubTB data signal, and generates the mux-lub- over-lnternet-protocol (MlublP) data signal. The main function of the internet- protocol-ϊnterface device 17 is to transmit over the internet protocol (IP) communication channel between the ZCeII receiver 70 and the MUX 60. The internet protocol (IP) communication channel is well known in the art, and as such so is the internet-protocol-interface device 17.
MUX
The MUX 60 includes an internet-protocol-interface device 5, a delay device 6, a combiner 7, and a network-interface device 8. The internet-protocol- rnterface device 5 receives said MlubfP data signal from said ZCeII receiver device 70 over the lub communication channel. The main function of the internet-protocol-interface device 5 is to terminate the internet protocol (IP) communication channel between the MUX 60 and said ZCeII receiver 70, and to generate the mux-lub-transpσrt-bfock (MlubTB) data signal. The internet protocol (IP) communication channel is well known in the art, and as such so is the internet-protocol-interface device 5.
The delay device 6 delays in time said MlubTB data signal and generates the delayed-mux-lub-transport-block (DMIubTB) data signal. The delay device 6 may include shift registers with appropriate taps, as is well known in the art, for delaying in time said MlubTB data signal. The delay device 6 alternatively may be embodied as, or as part of, a digital signal processor (DSP), or application specific integrated circuit (ASIC). Construction of DSPs and ASICs, and their use, are well known in the art. The delay device 6 alternatively may include a memory. The memory may be constructed from discrete components, or as part of a DSP or ASIC.
Combiner 7 receives said DMIubTB data signal and generates the combined- lub-transport-block (ClubTB) data signal.
The present invention may include additional delay devices for delaying additional said MIuTB data signals that are associated with a multitude of ZCeII receiver devices. By way of example, the invention may include up to n delay devices as shown in Figures 5 & 6.
Combiner 7 is coupled to delay devices 22, 23, and 24 as shown in Figure 6. The internet-protocol-interface device 5 receives the mux-lub-ove-internet- protocoM (MlublPI) data signal generated by ZCeIl #1 device 18 and generates the mux-lub-transport-block-1 (MlubTBI) data signal. The internet- protocol-interface device 5 also receives the mux-lub-ove-internet-protocol-2 (MlublP2) data signal generated by ZCeII #2 device 19 and generates the mux- fub-transport-blσck-2 (MlubTB2) data signal. The internet-protocol-interface device 5 also receives the mux-lub-ove-intemet-protocol-n (MlublPn) data signal generated by ZCeII #n device 20 and generates the mux-lub-transport- block-n (MlubTBn) data signal. Delay device 22 receives said MlubTBI data signal and generates the delayed-mux-lub-transport-1 (DMIubTBI) data signal. Delay device 23 receives said MlubTB2 data signal and generates the delayed- mux-lub-transport-2 (DMIubTB2) data signal. Delay device 24 receives said MlubTBn data signal and generates the delayed-mux-lub-transport-n (DMIubTBn) data signal. Combiner 7 generates the combined-ϊub-transport- block (ClubTB) data signal. The said ClubTB data signal frame and content is shown in Figure 7.
The network-interface device 8 generates the base-station-controller-mux-lub (BSCMlub) data signal. The main function of the network-interface device 8 is to terminate the communication channel with the base-station-controller 17. The physical communication channel, between the network-interface device 8 and the base-station-controller 17, and the associated protocols are well known in the art, and as such so is the network-interface device 8.
It will be apparent to those skilled in the art that various modifications can be made to the novel distributed base station architecture of the instant invention without departing from the scope or spirit of the invention, and it is intended that the present invention cover modifications and variations of the novel distributed base station architecture provided they come within the scope of the appended claims and their equivalents.

Claims

CLAIMSI claim:
1. An improvement to cellular network deployment comprising: a demultiplexer (DEMUX), said DEMUX including, a network-interface device for receiving the base-station-controller-demux
(BSCDIub) data signal from the base-station-controller and generating the demultiplexer-lub-transport-block (DlubTB) data signal; a delay device, coupled to said network-interface device, for delaying the
DlubTB data signal and generating the delayed-demux-lub-transport-block
(DDIubTB); an address-generator device, coupled to said delay device, for generating the Internet-protocol-ZCell-address (IPZAD) data signal; an internet-protocol-interface device, coupled to said address-generator device and to said delay device, for combining said IPZAD data signal with said DDIubTB data signal and generating the ZCell-lub-over-internet- protocol (ZlublP) data signal; a ZCeII transmitter, said ZCeII transmitter including, an internet-protocol-interface device for receiving said ZlublP data signal and for generating the ZCell-lub-transport-block-data (ZlubTBD) signal; a processor, coupled to said inernet-protocol-interface device, for generating the transmitted-traffic-data (TTD) signal; channel-element means, coupled to said processor, for generating the transmitted-base-band-modulated-traffic-data (TBBMTD) signal; a radio-frequency-up-converter (RFUC), coupled to said channel-element means, for generating the transmitted-radio-frequency-modulated-traffic- data (TRFMTD) signal; a power amplifier device, coupled to said RFUC device, for amplifying said
TRFMTD signal and generating the amplified-transmitted-radio- frequency-modulated-traffic-data (ATRFMTD) signal; a combiner, coupled to said power amplifier device, for filtering said
ATRFMTD signal and for generating the filtered-amplified-transmitted- radio-frequency-modulated-traffic-data (FATRFMTD) signal; a transmitter antenna, coupled to said combiner for radiating said
FATRFMTD signal over a communication channel; a ZCeII receiver, said ZCeII receiver including, a receiver antenna for coupling the ZCeII receiver to the communications channel; a combiner, coupled to said receiver antenna, for separating the received- radio-frequency-modulated-traffic-data (RRFMTD) signal from other non receiver out-of-band signals and for outputting the filtered-received-radio- frequency-modulated-traffic-data (FRRFMTD) signal; a radio-frequency-down-converter (RFDC) device, coupled to said combiner for generating the receϊved-base-band-modulated-traffic-data (RBBMTD) signal; channel-element means, coupled to said RFDC device, for demodulating and for generating the received-traffic-data (RTD) signal; a processor, coupled to said channel-element means, for generating the lub-transport-block (lubTB) data signal; an internet-protocol-interface device, coupled to said processor, for adding internet protocol packets overhead and framing to said lubTB data signal, and for generating the mux-fub-over-tnternet-protocol (MfublP) data signal; a multiplexer (MUX), said MUX including, an internet-protocol-interface device for receiving said MlublP data signal from the tub communication channel and for generating the mux-Iub- transport-block (MlubTB) data signal; a delay device, coupled to said internet-protocol-interface device, for delaying in time said MlubTB data signal and for generating the delayed- mux-Iub-transport-bfock (DMIubTB) data signal; a combiner, coupled to said delay device, for generating the combined-lub- transport-block (ClubTB) data signal; and a network-interface device, coupled to said combiner, for generating the base-statfoπ-controller-mux-lub (BSCMtub) data signal.
2. The distributed base station architecture as set forth in claim 1, further comprising: said DEMUX including: a second address-generator device, coupled to said DEMUX internet- protocol-interface device, for generating a second-internet-protocol-ZCell- address (2IPZAD) data signal; and said internet-protocol-interface device, coupled to said second-address- generator device and to said delay device, for combining said 2IPZAD data signal with said DDIubTB, and for generating a second-ZCell-tub- over-internet-protocol (2ZlublP) data signal.
3. The distributed base station architecture as set forth in claim 2, further comprising: said MUX including: said internet-protocol-interface device for receiving second-mux-lub-over- internet-protocol (MlublP2) data signal from the lub communication channel and for generating the second-mux-lub-transport-block (MlubTB2) data signal; a second delay device, coupled to said internet-protocol-interface device, for delaying in time said MlubTB2 data signal and for generating the second- delayed-mux-lub-transport-block (DMIubTB2) data signal; and said combiner, coupled to said delay device and to said second delay device, for generating the combined-lub-transport-block (ClubTB) data signal.
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