CN101573894B - Improved spot beam satellite systems - Google Patents

Abstract

A method is presented for transmitting data in a satellite system having multiple spot beams comprising (1) sending a broadband signal in a forward direction from a gateway terminal to a communications satellite for relay to at least one subscriber terminal, (2) receiving the broadband signal at the communications satellite, wherein the communications satellite comprises a bent pipe repeater having a plurality of satellite-based transmission amplifiers, (3) using one of the plurality of satellite-based transmission amplifiers to amplify the broadband signal and no other broadband signal from the gateway terminal, to produce an amplified broadband signal, (4) sending the amplified broadband signal as one of a plurality of service spot beams to the at least one subscriber terminal, and (5) receiving and retrieving data from the amplified broadband signal at the at least one subscriber terminal.

Description

Improved spot beam satellite system

The cross reference of related application

The application advocates the rights and interests of the U.S. Provisional Application No. 60/827924 (agent registration 017018-008000US) of application on October 3rd, 2006, is hereby expressly incorporated by reference.

The application advocates the rights and interests of the U.S. Provisional Application No. 60/827927 (agent registration 017018-008300US) of application on October 3rd, 2006, is hereby expressly incorporated by reference.

The application advocates the rights and interests of the U.S. Provisional Application No. 60/827959 (agent registration 017018-008500US) of application on October 3rd, 2006, is hereby expressly incorporated by reference.

The application advocates the rights and interests of the U.S. Provisional Application No. 60/827960 (agent registration 017018-008600US) of application on October 3rd, 2006, is hereby expressly incorporated by reference.

The application advocates the rights and interests of the U.S. Provisional Application No. 60/827964 (agent registration 017018-008800US) of application on October 3rd, 2006, is hereby expressly incorporated by reference.

The application advocates the rights and interests of the U.S. Provisional Application No. 60/827038 (agent registration 017018-010400US) of application on September 26th, 2006, is hereby expressly incorporated by reference.

The application is hereby expressly incorporated by reference the full content of following patent application:

With this PCT application PCT application the of " Improved Spot Beam Satellite Ground Systems " (temporarily with reference to the agent registration 017018-009510PC) by name of application on the same day _ _ _ _ _ number;

With this PCT application PCT application the of " Multi-Service Provider Subscriber Authentication " (temporarily with reference to the agent registration 017018-007710PC) by name of application on the same day _ _ _ _ _ _ _ _ number;

With this PCT application PCT application the of " Large Packet Concatenation In Satellite Communication System " (temporarily with reference to the agent registration 017018-008210PC) by name of application on the same day _ _ _ _ _ _ _ _ number;

With this PCT application PCT application the of " Upfront Delayed Concatenation In Satellite Communication System " (temporarily with reference to the agent registration 017018-010510PC) by name of application on the same day _ _ _ _ _ _ _ number;

Apply for this PCT " the Map-Trigger Dump Of Packets In Satellite by name applied on the same day

Communication System " (temporarily with reference to agent registration 017018-010610PC) PCT application the _ _ _ _ _ number;

With this PCT application PCT application the of " Web/Bulk Transfer Preallocation of Upstream Resources In A Satellite Communication System " (temporarily with reference to the agent registration 017018-010710PC) by name of application on the same day _ _ _ _ _ _ number;

With this PCT application PCT application the of " Improved Spot Beam Satellite Systems " (temporarily with reference to the agent registration 017018-008010PC) by name of application on the same day _ _ _ _ _ _ number;

With this PCT application PCT application the of " Downstream Waveform Sub-Channelization For Satellite Communications " (temporarily with reference to the agent registration 026258-002400PC) by name of application on the same day _ _ _ _ _ _ _ _ number;

With this PCT application PCT application the of " Packet Reformatting For Downstream Links " (temporarily with reference to the agent registration 026258-002700PC) by name of application on the same day _ _ _ _ _ _ _ number; And

With this PCT application No. the, the PCT application of " Upstream Resource Allocation For Satellite Communications " (temporarily with reference to the agent registration 026258-002800PC) by name of application on the same day.

Technical field

The application generally relates to radio communication, particularly satellite communication network.

Background technology

Along with the startup of the interspace Network of using the Ka band satellite, consumer's broadband satellite business is obtaining attraction in North America.First generation satellite system although it is so can provide all told of a plurality of gigabits of every satellite per second (Gbps), but the design of such system has limited the consumer's that can be served fully quantity inherently.In addition, further limited the bandwidth of each user (subscriber) across the fact of a plurality of overlay areas dispersion capacity.

Be designed with a plurality of capacity limit although existing, for the still sustainable growth of demand of such broadband services.Several years in past have been seen the powerful advantages in communication and treatment technology.In conjunction with system and the element design of selected innovation, this technology can be utilized to produce new wireless communication system and solve this demand.

Summary of the invention

The present invention relates to a kind of method for allocation of transmission bandwidth.The method comprises: send the subscriber terminal side of Satellite uplink signals in the transmission channel that is distributed in the first distribution by central location (first assigned frequency channel), by the transmission channel in the first distribution, in the transmission cycle of time-division, sending and send off and on Satellite uplink signals.The method further is included in subscriber terminal side, come from transmission between the transmission cycle of time-division of Satellite uplink signals of user terminal and monitor the described first transmission channel distributed, may there is at least one observed result of another signal to generate in the transmission channel about the first distribution, and described at least one observed result is reported to central location.The method also is included in the central location side, receive described at least one observed result, and described at least one observed result based on described user terminal report is determined the transmission channel that user terminal is re-assigned to the second distribution, and the message of the result that transmission is redistributed sends to user terminal, in order to guide user terminal to send Satellite uplink signals in the transmission channel of the second distribution.

According to an embodiment, the method further comprises that supervision at least one out of band channel different from the first transmission channel distributed is to generate the step of described at least one observed result, and wherein said at least one observed result further relates to the signal that may exist in described at least one out of band channel.Described at least one out of band channel can comprise the adjacent channel adjacent with the transmission channel of the first distribution.

According to an embodiment, at least one observed result indication is as the existence of main frequency spectrum license holder's external source, and user terminal is less important frequency spectrum license holder.As an example, described at least one observed result indication land mobile data service (LMDS) user's existence.

According to an embodiment, user terminal further can be used the first antenna to receive the satellite downlink signal in the receiving channels of the first distribution, and uses the second antenna to monitor the first transmission channel distributed.For example, the first antenna is for receiving satellite signal, and the second antenna is for receiving ground signal.

According to an embodiment, determining that when user terminal is redistributed to the transmission channel to the second distribution, central location is also considered the observed result of other user terminals reports except described at least one observed result of user terminal report.

The invention still further relates to a kind of in utilizing the multibeam satellite system of frequency reuse the method for communication data.

The method is included in business beam that between satellite and a plurality of user terminal, foundation comprises uplink service wave beam and downlink traffic wave beam to form a plurality of business beams overlay area, and each downlink traffic wave beam is relevant from different business beam overlay areas.By reusing at least one common uplink frequency channel, a plurality of uplink service wave beams are sent to satellite, and send a plurality of downlink traffic wave beams by reusing at least one common downlink frequency channel from satellite.

The method further is included between satellite and gateway terminal sets up at least one uplink feeder beam and at least one downlink feeder beam, described at least one downlink feeder beam is associated with a feeder beam overlay area, described feeder beam overlay area and described a plurality of business beams overlay area are separately, receive described at least one uplink feeder beam to form a plurality of downlink traffic wave beams at the satellite side joint, at the satellite side joint, receive a plurality of uplink service wave beams to form described at least one downlink feeder beam.Come to send described at least one uplink feeder beam to satellite by further reusing described at least one common uplink frequency channel, and come to send described at least one downlink feeder beam from satellite by further reusing described at least one common downlink frequency channel.

According to embodiments of the invention, described at least one uplink feeder beam comprises a plurality of uplink feeder beam, and described at least one downlink feeder beam comprises a plurality of downlink feeder beam.Send a plurality of uplink feeder beam by again further reusing described at least one common uplink frequency channel to satellite.In addition, send a plurality of downlink feeder beam by again further reusing described at least one common downlink frequency channel from satellite.

According to an embodiment, described at least one uplink feeder beam comprises 4 carrier waves, wherein said at least one common uplink frequency channel comprises two channels that each can be distinguished by right-handed circular polarization (RHCP) and left-hand circular polarization (LHCP), with 4 unique combination of forming frequency and polarization, and of 4 unique combination of wherein each frequencies of utilization of 4 carrier waves and polarization sends.

According to an embodiment, described at least one downlink feeder beam comprises 4 carrier waves, wherein said at least one common downlink frequency channel comprises two channels that each can be distinguished with left-hand circular polarization (LHCP) mutually by right-handed circular polarization (RHCP), with 4 unique combination of forming frequency and polarization, and of 4 unique combination of wherein each frequencies of utilization of 4 carrier waves and polarization sends.

According to an embodiment, each uplink service wave beam comprises 1 carrier wave, wherein said at least one common uplink frequency channel comprises two channels that each can be distinguished with left-hand circular polarization (LHCP) mutually by right-handed circular polarization (RHCP), with 4 unique combination of forming frequency and polarization, and of 4 unique combination of wherein each carrier wave frequency of utilization of uplink service wave beam and polarization sends.

According to an embodiment, each downlink traffic wave beam comprises 1 carrier wave, wherein said at least one common downlink frequency channel comprises two channels that each can be distinguished with left-hand circular polarization (LHCP) mutually by right-handed circular polarization (RHCP), with 4 unique combination of forming frequency and polarization, and of 4 unique combination of wherein each carrier wave frequency of utilization of downlink traffic wave beam and polarization sends.Described at least one common uplink frequency channel comprises the channel of 500MHz.Described at least one common downlink frequency channel comprises the channel of 500MHz.

The invention still further relates to a kind of method that sends data in having the satellite system of a plurality of spot beams, described method is included on the forward direction from the gateway terminal to the communication satellite and sends broadband signal to be relayed at least one user terminal.Described method also is included in the communication satellite side joint and receives described broadband signal, wherein communication satellite comprises a bend pipe repeater, described bend pipe repeater has a plurality of satellite-based transmission amplifiers, and each satellite-based transmission amplifier can be carried out and amplify to generate the service point wave beam.Described method also comprises that with a plurality of satellite-based transmission amplifiers amplifies described broadband signal to produce the broadband signal of amplifying, and a transmission amplifier of wherein said a plurality of satellite-based transmission amplifiers is used to only amplify described broadband signal and does not amplify other broadband signals from gateway terminal.Described method also comprises the broadband signal of described amplification is sent to described at least one user terminal, the broadband signal of described amplification is sent out as a plurality of service points wave beam, a service point wave beam of described a plurality of service points wave beam comprises the earth surface overlay area of at least one user terminal containing lid, the broadband signal of wherein said amplification takies alone of described a plurality of service points wave beam.Described method also is included in that described at least one subscriber terminal side receives the broadband signal of described amplification and from the WBSR wideband signal recovery data of described amplification.

In one embodiment, the broadband signal of described amplification is single-carrier signal.The data transfer rate of the broadband signal support at least 1 gigabit per second (Gbps) of described amplification.The broadband signal of described amplification has at least bandwidth of 500MHz.

Each of a plurality of satellite-based transmission amplifiers comprises travelling-wave tube amplifier (TWTA).In one embodiment, a plurality of service points wave beam comprises 60 service point wave beams.The broadband signal sent from gateway terminal to communication satellite is comprised in of a plurality of feeder beam of sending from the gateway terminal to the communication satellite.In one embodiment, a plurality of feeder beam comprise 15 feeder beam.Each of a plurality of feeder beam comprises 4 carrier waves, and each carrier wave meter is shown in the separation signal sent on the forward direction from the gateway terminal to the communication satellite.

The invention still further relates to a kind of method of utilizing superfluous satellite Pasteur power.The method is included in forward direction from gateway terminal to bend pipe relay communication satellite and sends the broadband signal that is comprised at least one feeder beam to be relayed at least one user terminal.Communication satellite can be used to provides Pasteur's power total amount, wherein the existing payload of communication satellite consumes the part that takies of Pasteur's power total amount, wherein the extra payload of communication satellite consumes the remainder of Pasteur's power total amount, and communication satellite comprises a plurality of satellite-based transmission amplifiers, each satellite-based transmission amplifier can be carried out and amplify to generate the service point wave beam.The method also is included in the communication satellite side joint and receives described broadband signal and amplify described broadband signal to produce the broadband signal of amplifying with of described a plurality of satellite-based transmission amplifiers.The method also comprises the broadband signal that sends described amplification to described at least one user terminal, and the broadband signal of described amplification is sent out as a plurality of service points wave beam.The method also is included in described at least one subscriber terminal side and receives the WBSR wideband signal recovery data of the broadband signal of described amplification from described amplification.

According to an embodiment, described extra payload is supported complete satellite system, and complete satellite system comprises M feeder beam and N business beam.

According to optional embodiment, extra payload is supported the part of complete satellite system, and complete satellite system comprises M feeder beam and N business beam.As an example, complete satellite system comprises the business beam (N=60) of 15 feeder beam (M=15) and 60, and described extra payload is supported 2 feeder beam and 8 business beams.

In one embodiment, each of at least one feeder beam comprises 4 signals, and one of four various combinations of each signal frequency of utilization and polarization sends.A plurality of business beams are relevant from different earth surface coverage zone, and applying frequency reuses to utilize at least one common channel.Left-right-hand circular polarization is alternately used in the earth surface overlay area of the vicinity relevant to described a plurality of business beams.

Can use the different piece of frequency spectrum.For example, described at least one feeder beam and described a plurality of business beam utilize at least one channel of Ka wave band.

The invention still further relates to a kind of method of utilizing user terminal and gateway terminal to locate to operate multibeam satellite system.

The method is included in a plurality of user terminals in location in a plurality of business beams overlay area, described user terminal can be set up uplink service wave beam and downlink traffic wave beam between user terminal and satellite, and the downlink traffic wave beam is relevant from described a plurality of different business beam overlay areas.Send a plurality of uplink service wave beams by reusing at least one common uplink frequency channel to satellite, and send a plurality of downlink traffic wave beams by reusing at least one common downlink frequency channel from satellite.

The method also is included in location gateway terminal in the feeder beam overlay area, described gateway terminal can be set up uplink feeder beam and downlink feeder beam between gateway terminal and satellite, downlink feeder beam is relevant to described feeder beam overlay area, described feeder beam overlay area and described a plurality of business beams overlay area are divided and are arranged, receive uplink feeder beam to form a plurality of downlink traffic wave beams at the satellite side joint, at the satellite side joint, receive a plurality of uplink service wave beams to form downlink feeder beam.Send uplink feeder beam by further reusing described at least one common uplink frequency channel to satellite, and send downlink feeder beam by further reusing described at least one common downlink frequency channel from satellite.

Gateway terminal can be of a plurality of gateway terminals, and each gateway terminal is positioned in a different feeder link overlay area of a plurality of feeder links overlay area.According to an embodiment, the minimum range that other gateway terminals of each in each of described a plurality of gateway terminals and described a plurality of gateway terminal are separated is 400 kilometers.In being placed on and connecting the distance of 50 kilometers apart from fiber optic network according to each of the described a plurality of gateway terminals of embodiment.According to an embodiment, each of described a plurality of gateway terminals is placed on the percentage of time for appointment, whole rain of described at least one common uplink frequency channel decline (for example 99.99% of the time) for example be less than, on the position of decline (decline of 10dB) of specified quantitative.

The accompanying drawing explanation

Figure 1A is the block diagram of the schematic satellite communication system of different embodiment according to the subject invention configuration;

Figure 1B means the block diagram of the optional embodiment of wireless communication system;

Fig. 2 A is the example that the multiple-beam system of different embodiment according to the subject invention configuration is shown;

Fig. 2 B is another example that the multiple-beam system of different embodiment according to the subject invention configuration is shown;

Fig. 3 means the embodiment of the ground system of the gateway shown in the block diagram form;

Fig. 4 means the embodiment of the SMTS shown in the block diagram form;

Fig. 5 means the embodiment of the satellite shown in the block diagram form;

Fig. 6 A means the embodiment of the upstream transponder shown in the block diagram form (upstream translator);

Fig. 6 B means the embodiment of the downstream translator shown in the block diagram form (downstream translator);

Fig. 7 means the block diagram of one group of subscriber equipment, and this group subscriber equipment can be positioned at customer location to receive and to send signal of communication;

Fig. 8 means the embodiment of downstream channel;

Fig. 9 means the embodiment of upstream channel;

Figure 10 means the embodiment of gateway reflector;

Figure 11 means the embodiment of gateway receiver;

Figure 12 A means the embodiment of forward link (forward link) distribution system;

Figure 12 B means the embodiment of return link (return link) distribution system;

Figure 13 means the embodiment of channel mapping;

Figure 14 means adoptable according to one embodiment of present invention example frequency reuse (Frequency Re-use) plan;

Figure 15 means illustrative system according to an embodiment of the invention, and this system has adopted the self adaptation of satellite uplink frequency band to use.

Embodiment

Various embodiment of the present invention comprises system, method, equipment and the software for new broadband satellite network.Schematic embodiment only is provided in embodiment, be not used in limit the scope of the invention, application or configuration.Contrary, the description subsequently of embodiment will provide the embodiment that can implement embodiments of the invention to those of ordinary skills.Can carry out various changes and without departing from the spirit and scope of the present invention to the function of assembly and layout.

Thus, different embodiment can omit, deduct or increase various processes or element rightly.For example, should be appreciated that in interchangeable embodiment, can be by with described method different order, carrying out manner of execution, and can increase, omit or merge different step.And, for the described feature of some embodiment, also can be integrated in other different embodiment.Different aspect and the assembly that can merge in a similar manner embodiment.In addition, before can embodiment below, need a plurality of steps afterwards or simultaneously.

Should also be appreciated that following system, method, equipment and software can be the elements of larger system, wherein their application can preferentially be carried out or revise to other processes.

Figure 1A is the block diagram of the schematic satellite communication system 100 that configures according to various embodiments of the present invention.This satellite communication system 100 comprises for example network 120 of internet, and network 120 is connected with gateway 115 interfaces, and gateway 115 is for 105 communicating by letter with one or more user terminals 130 via satellite.Gateway 115 is called as hub or ground station sometimes.User terminal 130 is called as modulator-demodulator, satellite modem or user terminal sometimes.As mentioned above, although communication system 100 is illustrated as the communication system based on geostationary satellite 105, but should be noted that various embodiment described herein is not limited to use in the system based on geostationary satellite, for example some embodiment can be based on the system of near-earth orbit (Low Earth Orbit, LEO) satellite.

In different embodiment, network 120 can be the network of any type, and can comprise for example internet, IP network, Intranet, wide area network (WAN), local area network (LAN) (LAN), Virtual Private Network, public switch telephone network (PSTN) and/or support the network of any other type of the data communication between equipment described herein.Network 120 can include wired and wireless connections, and comprises optical link.According to the disclosure, many for the person of ordinary skill of the art other examples are possible and obvious.As described in a plurality of embodiment, network can be by also being connected gateway 115 with other gateways (not shown) of satellite 105 communications.

Gateway 115 provides the interface between network 120 and satellite 105.Gateway 115 can be for receiving data and the information of pointing to one or more user terminals 130, and these data and information can be formatd to 105 be sent to each destination equipment via satellite.Similarly, gateway 115 can receive signal for the satellite 105 (from one or more user terminals) of the destination from pointing to network 120, and the signal of reception can be formatd to transmit along network 120.

The equipment (not shown) that is connected to network 120 can be by gateway 115 and one or more user terminal communications.Can send data and information, for example IP datagram to gateway 115 by the equipment from network 120.Gateway 115 can be formatd media access control (MAC) frame in order to be transferred to satellite 130 according to the physical layer definition.Some embodiment of the present invention can be used various physical layer transmission modulation and coding techniques, comprises those technology of DVB-S2 and WiMAX standard definition.From gateway 115 to satellite, 105 link 135 can be hereinafter referred to as downstream uplink 135.

Gateway 115 can be sent to satellite 105 by signal with antenna 110.In one embodiment, antenna 110 comprises paraboloidal reflector, and this parabola reflector has high directionality and has low directionality in other directions in satellite direction.Antenna 110 can comprise various interchangeable configurations and assembly, and this interchangeable configuration and assembly comprise operating characteristics, for example high efficiency and the low noise of the high isolation between orthogonal polarization, operational frequency bands.For example, antenna 110 can comprise assembly array in one embodiment.

In one embodiment, geostationary satellite 105 receives signal for the position from antenna 110 and in the frequency band and the particular polarization that send.Such as, satellite 105 can receive such signal by reflector antenna, lens antenna, array antenna, active antenna or other mechanism well known in the prior art.Satellite 105 can be processed the signal received from gateway 115, and will be forwarded to from the signal that comprises mac frame of gateway 115 one or more user terminals 130.In one embodiment, satellite 105, with the operation of multi-beam pattern, sends a plurality of narrow beams that each points to the zones of different of the earth, and tolerance frequency is reused.By such multi-beam satellite 105, can there is the unlike signal handover configurations of arbitrary number to satellite, allow to switch between the difference wave beam from the signal of single gateway 115.In one embodiment, satellite 105 can be configured to " bend pipe (bent pipe) " satellite, its Satellite carried out frequency translation by these signals resend their destination in the carrier signal by receiving before, and other processing are carried out or do not carried out to the content of signal hardly.Can use various physical layer transmission modulation and coding techniques according to the satellite 105 of some embodiment of the present invention, comprise those technology of DVB-S2 and WiMAX standard definition.For other embodiment, it is evident that for those of ordinary skills, a plurality of configurations are possible (for example, use the LEO satellite or use the mesh network (mesh network) that replaces star network (star network)).

One or more user terminals 130 can receive by user antenna 125 separately the service signal sent from satellite 105.In one embodiment, antenna 125 forms very small aperture terminal (Very Small Apeture Terminal, VSAT) together with terminal 130, and antenna 125 is measured about 0.6 rice diameter and has about 2 watts of power.In other embodiments, can receive signal from satellite 105 with the antenna 125 of various other types at user terminal 130.From satellite 105 to user terminal, 130 link 150 can be called as downstream downlink 150 hereinafter.Each user terminal 130 can comprise the unique user terminal, or comprises alternatively hub or the router (not shown) that is connected to a plurality of user terminals.Each user terminal 130 can be connected to ustomer premises access equipment (Consumer Premises Equipment, CPE) 160, and CPE 160 comprises such as computer, local area network (LAN), internet appliance, wireless network etc.

In one embodiment, multi-frequency time division multiple access (MF-TDMA) scheme, for upstream link 140,145, allows effectively flowing of the traffic to maintain the flexibility of partition capacity simultaneously between each user terminal 130.In this embodiment, can distribute a plurality of channels, the plurality of channel be fix or in more dynamic mode, distributed.Can also in each channel, apply time division multiple access (TDMA) scheme.In this scheme, each channel can be divided into a plurality of time slots that can be assigned to connection (for example, user terminal 130).In other embodiments, can be with the one or more upstream links 140,145 of other arrangements, for example, mixing or other schemes of frequency division multiple access (FDMA), OFDM (OFDMA), code division multiple access (CDMA) or arbitrary number well known in the prior art.

User terminal, for example 130-a, can 105 be sent to network 120 destinations by data and information via satellite.User terminal 130 is used antenna 125-a, by upstream up link 145-a, signal is sent to satellite 105.User terminal 130 can be according to the modulation of various physical layer transmission and coding techniques, comprises that the technology defined in DVB-S2 and WiMAX standard carrys out transmitted signal.In various embodiments, for each link 135,140,145,150, physical-layer techniques can be identical or can be different.From satellite 105 to gateway, 115 link can be hereinafter referred to as upstream downlink 140.

Return to Figure 1B, block diagram is for meaning the optional embodiment of satellite communication system 100.For example, this communication system 100 can comprise the system 100 of Figure 1A, but describes in this example more in detail.In this embodiment, gateway 115 comprises satellite modem terminating systems (Satellite Modem Termination System, SMTS), it is at least in part based on wire cable database service interface standard (Data-Over-Cable Service Interface Standara, DOCSIS).SMTS in this embodiment comprises a series of modulator and demodulator, for to user terminal 130 transmitted signals with from user terminal 130, receiving signal.SMTS in gateway 115 is the Real-Time Scheduling of the 105 executive signal traffics via satellite, and the interface that is connected to network 120 is provided.

In the present embodiment, user terminal 135 is also used the modem circuit based on DOCSIS of part.Thus, SMTS can be used resource management, agreement and scheduler based on DOCSIS effectively to give information.In different embodiment, can revise element based on DOCSIS to be suitable for for wherein.Thus, some embodiment can utilize some part of docsis specification, customizes other parts simultaneously.

Although the above has briefly described the satellite communication system 100 that can be used in different embodiment, the specific embodiment of such system 100 will be described now.To use the bandwidth of about 2 Gigahertzs (GHz) in this specific examples, comprise the bandwidth of four 500 megahertzes (MHz) of adjacent spectra.The application of double-circle polarization causes comprising the usable frequency of the nonoverlapping bands of 8 500MHz with total available band 4GHz.This specific embodiment application multi-beam satellite 105, and gateway 115 and user's spot beam physical separation, and allow the frequency reuse at different links 135,140,145,150.Each service link spot beam on downstream downlink is used to single travelling-wave tube amplifier (TWTA), and each TWTA operates to reach maximal efficiency in complete saturation condition.Single broadband carrier signal, for example used the whole of a 500MHz frequency band, fills the whole bandwidth of TWTA, allows thus the space hardware assembly of minimal amount.Spot beam size and TWTA power can be optimized to obtain the every square metre of every megahertz (dbW/m of flux peak density-118 dBw on earth surface ²/ MHz).Thus, use approximate every hertz of 2 bits per second (bits/s/Hz), have the available bandwidth of about every spot beam 1Gbps.

Show the embodiment of forward link assignment system 1200 with reference to figure 12A.As shown in the figure, gateway 115 is connected to antenna 110, and this produces four downstream data flow signals.The single carrier wave that each use of four downstream uplink 135 is there is to the 500MHz frequency spectrum.In this embodiment, two frequencies and two polarization allow four independent downstream uplink 135 altogether, and only use the frequency spectrum of 1GHz.For example, link A 135-A can be the Freq 1U (27.5-28.0GHz) with left-handed polarization, link B135-B can be the Freq 1U (27.5-28.0GHz) with right-hand polarization, link C can be the Freq 2U (29.5-30GHz) with left-handed polarization, and link D can be the Freq 2U (29.5-30GHz) with right-hand polarization.

Four " bend pipe " that satellite 105 is described as between feeder link (feeder link) and service link with being functionalized connects.105 " bend pipe " connects the direction that changes carrier signal and polarization via satellite.Satellite 105 is converted to downstream downlink signal 150 by each downstream uplink 135 signal.

Have in the present embodiment four downstream downlink 150, each downstream downlink 150 provides service link for four spot beams 205.Downstream downlink 150 can change frequency as in the situation of the present embodiment in bend pipe.For example, downstream uplink A 135-A 105 changes second frequency (that is, Freq 1D) into from first frequency (that is, Freq 1U) via satellite.Other embodiment also can change the up link of given downstream channel and the polarization between down link.Some embodiment can be used identical polarization and/or frequency to up link and the down link of given downstream channel.

Below with reference to Figure 12 B, show the embodiment of return link distribution system.This embodiment means four upstream up links 145 from four groups of user terminals 125." bend pipe " satellite 105 adopts upstream up link 145, changes alternatively carrier frequency and/or polarization (not shown), then 140 spot beams that again are directed to for gateway 115 using them as upstream downlink.In this embodiment, carrier frequency changes between up link 145 and down link 140, identical but polarization keeps.Due to the feeder line spot beam to gateway 115 not in the overlay area in business beam, therefore can to service link and feeder link, the two reuses identical frequency pair.

Return to Fig. 2 A and 2B, show the example of the multiple-beam system 200 of different embodiment according to the subject invention configuration.For example, this multiple-beam system 200 can be realized in the network 100 of Figure 1A and 1B description.There is shown the coverage of a plurality of feeder lines and business spot beam zone 225,205.In this embodiment, the certain area that satellite 215 is isolated country (for example, the U.S., Canada or Brazil) by the directivity by antenna carrys out reuse band.As shown in Figure 2 A, there is geographical exclusiveness completely between feeder line and service point wave beam 205,225.But be not such situation for Fig. 2 B, have service point wave beam overlapping (for example 205-c, 205-d, 205-e) in Fig. 2 B in some example, and do not exist overlapping in other zones.Yet, by overlapping, have some interference problem, thereby may forbid the frequency reuse in overlapping region.Four Color Pattern (Four Color Pattern) are even in the situation that exist some overlapping possibility avoided interference that also provides between adjacent business beam 205.

In this embodiment, also show gateway terminal 210 and feeder beam 225 thereof.As shown in Fig. 2 B, gateway terminal 210 for example can be positioned at, by the zone of business spot beam coverage (, first, second and the 4th gateway 210-1,210-2,210-4).For example, yet gateway also can be positioned at outside the zone of business spot beam coverage (the 3rd gateway 210-3).For example, by (the 3rd gateway 210-3) outside the zone that gateway terminal 210 is arranged to the business spot beam coverage, realize that geographical separation is to allow to reuse the frequency of distribution.

Usually there is standby gateway terminal 210 in given feeder line spot beam 225.If primary gateway terminal 210-4 work is undesired, this standby gateway terminal 210-5 can substitute primary gateway terminal 210-4.In addition, can when damaging because of weather, the primary gateway terminal use this standby gateway terminal.

Below with reference to Fig. 8, show the embodiment of downstream channel 800.Downstream channel 800 comprises a series of continuous superframes 804, and each superframe 804 can have identical size or vary in size.This embodiment is divided into a plurality of subchannels 808 (1-n) by superframe 804.Subchannel 808 (1-n) in each superframe 804 can be formed objects or vary in size.Can between different superframes 804, change the size of subchannel 808 (1-n).Can use alternatively different coding to different subchannel 808 (1-n).In certain embodiments, subchannel is the same short with a symbol on the duration.

With reference to figure 9, show the embodiment of upstream channel 900.The present embodiment is used MF-TDMA, but other embodiment can be used CDMA, OFDM, FDMA, TDMA or other access schemes.In one embodiment, upstream channel 900 has the whole bandwidth of 500MHz.Whole bandwidth is divided into m frequency subchannels, and each frequency subchannels can be different on bandwidth, modulation, coding etc. and also can be different on the time needed based on system.

In the present embodiment, provide the Upstream Traffic of two dimension (2D) map (two-dimetional (2D) map) for it to each user terminal 130.This 2D map has a plurality of entries, each entry indication frequency subchannels 912 and time period 908 (1-5).For example, a user terminal 130 has been assigned with subchannel m912-m, time period one 908-1; Subchannel two 912-2, time periods two 908-2; Subchannel two 912-2, time periods three 908-3 etc.According to the needs in advance of scheduler in SMTS, each user terminal 130 is dynamically adjusted to the 2D map.

With reference to Figure 13, show the embodiment of channel mapping.Only show the channel of single feeder line spot beam 225 and single service point wave beam 205, but embodiment can comprise many spot beams 225,205 (for example, different embodiment can have for example spot beam 225,205 of 60,80,100,120 every type).Forward channel 800 comprises the n sub-channels 808 that advances to service point wave beam 205 from gateway antennas 110.Each user terminal 130 can be assigned with one or more subchannels 808.M the back channel 900 that MF-TDMA channel 912 forms between user terminal (ST) antenna 125 and feeder line spot beam 225.

Below with reference to Fig. 3, show the embodiment of the ground system 300 that comprises a plurality of gateways 115 with the block diagram form.For example, an embodiment can have 15 has source gateway 115 (with possible standby gateway) to generate 60 service point wave beams.Ground system 300 comprises a plurality of gateways 115 that are connected to respectively antenna 110.All gateways 115 are connected to for example network 120 of internet.The information of network for collecting user terminal.In addition, each SMTS comes and other SMTS and Internet traffic by network 120 or other not shown means.

Each gateway 115 comprises transceiver 305, SMTS 310 and router three 25.Transceiver 305 comprise reflector and receiver the two.In this embodiment, reflector obtains baseband signal, and this baseband signal is carried out to up-conversion and amplification, for the transmission of the downstream uplink 135 by antenna 110.Receiver with this upstream downlink 140 is carried out to down-conversion and tuning together with as described below other are processed.SMTS 310 processing signals are to allow user terminal requests and reception information, and SMTS 310 is forward direction and back channel 800,900 scheduling bandwidths.In addition, SMTS 310 provides configuration information and receives the state of user terminal 130.Information any request or back is all passed through router three 25 and is forwarded.

With reference to Figure 11, show the embodiment of gateway receiver 1100.The embodiment of this receiver 1100 processes four back channels 900 of four different business spot beams 205.Can use antenna polarization and/or filtering 1104 to divide back channel 900 in four paths.Each back channel is connected to low noise amplifier (LNA) 1108.Down-conversion 1112 drops to the signal mixing its intermediate frequency.A plurality of tuners 1116 separate each upstream subchannel 912 from signal.Carry out further and process in SMTS 310.

Below with reference to Figure 10, show the embodiment of gateway reflector 1000.Receive the downstream channel 800 of intermediate frequency from SMTS 310.By the path of separating, with two different carrier frequencies, each downstream channel 800 is carried out to up-conversion 1004.Power amplifier 1008 increased the amplitude of forward channel 900 before being connected to antenna 110.The signal of 110 pairs of separation of antenna polarizes to keep four forward channels 800 not identical when they are passed to satellite 105.

With reference to figure 4, show the embodiment of SMTS 310 with the block diagram form.A plurality of gateways that geographically separate 115 pairs inbound (inbound) and (outbound) link 135,140 that sets off complete Base-Band Processing.Each SMTS 310 is divided into two parts usually, is specially, and sends information to the downstream data flow part 305 of satellite 105 and receives the upstream part 315 of information from satellite 105.

Downstream data flow part 305 is passed through a plurality of downstream data flows (Downstream, DS) blade (blade) 412 from construction of switch (Switch Fabric) 416 obtaining informations.Divide DS blade 412 in a plurality of downlink data flow-generators 408.This embodiment comprises four downlink data flow-generators 408, the corresponding downlink data flow-generator 408 of each downstream channel 800.For example, this embodiment is used the 500MHz spectral range of four separation with different frequency and/or polarization.Four dispersive modulators (Four Color Modulator) 436 have respectively the modulator for each DS generator 408.The modulated signal of intermediate frequency is coupled to the transmitter portion 1000 of transceiver 305.Each in four downlink data flow-generators 408 of this embodiment has J virtual DS blade 412.

The upstream part 315 of SMTS 310 receives and processes from satellite 105 with baseband intermediate frequency.After the base band upstream signal of 1100 pairs of four separation of receiver section of transceiver 305 produces all subchannels 912, every sub-channels 912 is coupled to different demodulator 428.Some embodiment can comprise switch before demodulator 428, thereby allowed to forward arbitrary return link subchannel 912 to arbitrary demodulator 428 to allow dynamically redistributing between four back channels 908.A plurality of demodulators are specifically designed to upstream (Upstream, US) blade 424.

US blade 424 is used for recovering this information before the information that will receive from satellite 105 is provided to construction of switch 416.US scheduler 430 on each US blade 424 is for the use to each user terminal 130 scheduling back channel 900.Can assess the further needs of the user terminal 130 of specific back channel 900, and cooperate and correspondingly adjust as required bandwidth/stand-by period with explorer and load equalizer (RM/LB) piece 420.

RM/LB piece 420 distributes the traffic among US and DS blade.By other RM/LB pieces 420 with in other SMTS 310, communicate by letter, each RM/LB piece 420 can be redistributed user terminal 130 and channel 800,900 to other gateways 115.Can, due to such the redistributing of reason generation arbitrarily, for example, be deficient in resources and/or the load consideration.In this embodiment, in a plurality of RM/LB pieces 420, with distributed way, make this decision, but other embodiment can by a main MR/LB piece or at certain other center determination means make this decision.For example, redistributing of user terminal 130 can be used overlapping service point wave beam 205.

Below with reference to Fig. 5, show the embodiment of satellite 105 with the block diagram form.60 feeder lines of satellite 105 use in this embodiment are communicated by letter with whole ST 130 with 15 gateways 115 with service point wave beam 225,205.Other embodiment can be used or more or less gateway/spot beam.Use for example energy of chemical fuel, nuclear fuel and/or sonar energy that Pasteur (buss) energy 512 is provided.Satellite controller 516 is for maintaining attitude (attitude) and controlling satellite 105 from other aspects.Can upload from gateway 115 software upgrading of satellite 105, and carry out this software upgrading by satellite controller 506.

Information 105 is transmitted via satellite on both direction.Downstream translator 508, from 15 gateways, 115 reception information, relays information to user terminal 130 with 60 service point wave beams 205.The user terminal 130 reception information of upstream transponder 504 from taking these 60 spot beam zones, and this information relay is arrived to these 15 gateways 115.The satellite of the present embodiment can switch the carrier frequency in downstream data flow or upstream data stream handle 508,504 in the mode of " bend pipe " configuration, but other embodiment can carry out baseband switching between different forward directions and back channel 800,900.The frequency of each spot beam 225,205 and polarization can be programmable or pre-configured.

With reference to figure 6A, show the embodiment of the upstream transponder 504 of satellite 105 with the block diagram form.Receiver and low-converter (Rx/DC) piece 616 receives all return link information for the zone by spot beam 205 definition as transforming to intermediate frequency (IF) analog signal before.Each business spot beam zone 205 is existed to Rx/DC piece 616.IF switch 612 is routed to specified upstream data flow downlink channel by particular baseband signal from Rx/DC piece 616.Use upconverter and travelling-wave tube amplifier (UC/TWTA) piece 620 to fill the upstream downlink channel.Can change frequency and/or polarity by this processing, make each upstream channel can pass through the satellite 105 of bend pipe form.

In upstream transponder 504, each gateway 115 is distributed to four special-purpose UC/TWTA pieces 620.In the present embodiment, two of four special-purpose UC/TWTA pieces 620 in the first frequency range operation, and two in the second frequency range operation.In addition, two are used right-hand polarization, and two are used left-handed polarization.Between two polarization and two frequencies, satellite 105 can be communicated by letter with each gateway 115 by the upstream downlink channel of four separation (separate).

Below with reference to Fig. 6 B, show the embodiment of downstream translator 508 with the block diagram form.Each gateway 115 is by being used two frequency ranges and two kinds of polarization to have four downstream uplink channels to satellite 105.Rx/DC piece 636 obtains analog signal and this signal is transformed to intermediate frequency.Whole 60 downstream uplink channels from 15 gateways 115 are all existed to Rx/DC piece 636.The particular channel 800 that IF switch 612 connects from gateway 115 to specific transactions spot beam 205.Each IF signal from switch 628 is modulated and amplifies by UC/TWTA piece 632.Antenna uses spot beam signal to be broadcast to the user terminal 130 that takies spot beam zone.Identical with upstream transponder 504, downstream translator 508 can change with the bend pipe form carrier frequency and the polarization of specific downstream channel.

Fig. 7 comprises the block diagram that means one group of subscriber equipment 700, and subscriber equipment 700 can be positioned at customer location to receive and to send signal of communication.For example, the element of this group subscriber equipment 700 comprises antenna 125, relevant user terminal 130 and any ustomer premises access equipment (CPE) 160, and ustomer premises access equipment 160 can be computer, network etc.

Antenna 125 can receive signal from satellite 105.Antenna 125 can comprise VSAT antenna or arbitrarily different other antenna types (for example, other parabolic antennas, microstrip antenna or helical antenna).In certain embodiments, antenna 125 can be configured to dynamically revise its configuration and receive better signal in certain frequency range or from certain position.Signal (may after the processing of certain form) is forwarded to user terminal 130 from antenna 125.User terminal 130 can comprise radio frequency (RF) front end 705, controller 715, subchannel filter 702, modulator 725, demodulator 710, filter 706, downstream data flow protocol conversion device 718, upstream protocol conversion device 722, receive (Rx) buffer memory 712 and send (Tx) buffer memory 716.

In the present embodiment, RF front end 705 has the sending and receiving function.Receiving function comprises the amplification (for example,, by low noise amplifier (LNA)) of the signal to receiving.Then this amplifying signal of down-conversion (for example, using frequency mixer to merge by amplifying signal with from the signal of local oscillator (LO)).The signal of this down-conversion can again be exaggerated by RF front end 705 before the processing of carrying out superframe 804 by subchannel filter 702.Select the subset of each superframe 804 from downstream channel 800 by subchannel filter 702, for example, one or more subchannels 808 are processed for further by filtering.

Can use various modulation and coding techniques at user terminal 130, for the signal from satellite reception and the signal that is sent to satellite.In the present embodiment, modulation technique comprises BPSK, QPSK, 8PSK, 16APSK, 32PSK.In other embodiments, extra modulation technique can comprise ASK, FSK, MFSK and QAM, and various analogue technique.Demodulator 710 can the demodulation down-conversion signal, the subchannel 808 after demodulation is forwarded to filter 706 to give the data of specific user terminal 130 by planning and other information of subchannel 808 are peeled off.

Once will go to the information isolation of specific user terminal 130, the agreement that downstream data flow protocol conversion device 718 will become for the protocol conversion of satellite link DOCSIS MAC piece 726 to use.Optional embodiment can be used WiMAX MAC piece or combination DOCSIS/WiMAC piece.Rx buffer memory 712 is DOCSIS MAC piece 726 manageable low rate data streams for the pulses switch that will receive at a high speed.DOCSIS

MAC piece 726 is receive the DOCSIS data flow and manage this data flow with the circuit for CPE 160.The task of DOCSIS MAC piece 726 management such as supply, Bandwidth Management, access control, quality of services etc.CPE can be used Ethernet, WiFi, USB and/or other standards interface to be connected with DOCSIS MAC piece 726 usually.In certain embodiments, can replace DOCSIS MAC piece 726 to allow to use the WiMAX agreement with WiMAX piece 726.

It should be noted that equally, although downstream data flow protocol conversion device 718 and upstream protocol conversion device 722 can be transformed into for the packet by reception the compatible frame of DOCSIS or WiMAX to be processed by MAC piece 726, these converters in many examples not necessarily.For example, in the embodiment that does not use the element based on DOCSIS or WiMAX, can not carry out such conversion with MAC piece 726 compatibilities for the agreement of satellite link yet, and can get rid of thus converter 718,722.

The various functions of controller 715 managing user terminals 130.Controller 715 can monitor various decoding of the prior art, interweaves, decoding and descrambling technology.Controller can also be managed the function that can be applicable to data signal and that process with one or more CPE 160 exchanges.CPE 160 can comprise one or more user terminals, for example personal computer, kneetop computer or other calculation elements arbitrarily of the prior art.

Realize in one or more application-specific ICs (ASIC) together with other elements of controller 715 and user terminal 130, but or realize at the general purpose processor for carrying out application function.Alternatively, can be carried out by one or more other processing units (or core) function of user terminal 130 in one or more integrated circuits.In other embodiments, can use the integrated circuit (for example, structure/platform ASIC, field programmable gate array (FPGA) and other semi-custom IC) of other types, it can be by any-mode programming well known in the prior art.Can be to the controller programming with accessing memory cells (not shown).Controller can be from memory cell instruction fetch and other data, or by the writing data into memory unit.

As mentioned above, can be in various signals of communication by data from CPE 160 by the up satellite 105 that is sent to of user terminal 130.Thus, CPE 160 can send data to DOCSIS MAC piece 726, before upstream protocol converter 722 translation protocol, to be converted to the DOCSIS agreement.Low speed data waits in Tx buffer memory 716 until its link pulse transmission via satellite.

Then the data of processing send to modulator 725 from Tx buffer memory 716, carry out the data of modulation treatment here by a kind of technology in technology as above.In certain embodiments, can in these transmission, use self adaptation or variable coding and modulation technique.Particularly, according to 105 the signal quality specification from antenna 125 to satellite, can be by the combination of different modulating and coding or " mould code (modcode) " for the different pieces of information bag.For example block up other factors of problem of network and satellite can be also to determine factor.Can be from satellite or other source received signal quality information, and can make in controller this locality or the long-range various decisions of making about mould code application.Then RF front end 705 can amplify signal with up-conversion modulation by antenna 125, to transfer to satellite.

The satellite framework

According to embodiments of the invention, proposed to have for foundation the novel framework of the multi-beam satellite system of the forward link that connects gateway and user terminal and return link.Accompanying drawing shows such multi-beam satellite system.For example, with reference to Figure 1A and Figure 1B, gateway 115 105 is sent to one or more user terminal 130-a to 130-n by forward link signal via satellite.Here, forward link refers to signal and is sent to one or more user terminals from gateway.Such gateway is to user's signal sometimes also referred to as the downstream data flow signal.In the opposite direction, described one or more user terminal 130-a to 130-n sends one or more return link signals to gateway 115.Such user is also sometimes referred to as the upstream signal to the signal of gateway.

One in many application of system as shown in Figure 1A and 1B can be to provide network insertion (for example internet access) to user terminal.For example, user terminal 130-a can 105 be used return link (upstream) signal (145-a, 140) to send network request to gateway 115 via satellite, thus the webpage of request on the internet.Gateway 115 responds by the webpage of asking from network 120 search, and network 120 can be directly or indirectly is connected to internet.Then gateway 115 105 is used forward link (downstream data flow) signal (135,150) to send the webpage of asking to user terminal 130-a via satellite, completes thus web-page requests and response.As known to persons of ordinary skill in the art, can carry out the procotol operation of different layers in this processing.

According to embodiments of the invention, satellite 105 comprises the bend pipe repeater, and this bend pipe repeater receives one or more signals and may after frequency inverted and polarity modification, this signal be sent it back to ground from ground.For example, each signal received with characteristic frequency or polarity at satellite 105 can send from satellite 105 with different frequency and/or polarity.This bend pipe repeater also can provide handover operation, make different " feeder signals " (, send to the signal of gateway or the signal sent from gateway) can be switched to be connected to different " service signal " (that is, sending to the signal of user terminal or the signal sent from user terminal).The bend pipe repeater will not be demodulated at the signal of satellite reception the data of bit for example and again not modulate these data for transmission.This is contrary with the processing repeater, and the processing repeater can be carried out such solution mediation and again modulate the enhancing that obtains the error correction performance.Even processing repeater is that business can be used, but the optimum efficiency in can obtaining forward link and return link is communicated by letter according to embodiments of the invention employing bend pipe repeater.

With reference to figure 6B, can realize the satellite element for the treatment of forward link in the downstream direction from the gateway to the user terminal as shown according to one embodiment of present invention.Here, 15 gateways send 60 forward link signals to satellite together.Particularly, each gateway utilizes antenna to send the uplink feeder beam that comprises four different forward link signals.The various combination of service band and polarization sends each of four forward link signals.As previously mentioned, the combination of each uniqueness is called as specific " color ".Receive each forward link signal at satellite at specific receiver module 636.Each receiver module 636 can comprise receiver, low noise amplifier (LNA) for example, low-converter (DC) is arranged at low noise amplifier (LNA) afterwards, and this low-converter is transformed to for example frequency easily of intermediate frequency (IF) by forward link signal.

According to embodiments of the invention, each forward link signal is broadband signal.Here, term " broadband " is for the situation of satellite communication, and specifically refers to and have at least signal of 250MHz bandwidth.For example, in the present embodiment, each forward link signal is broadband signal and the bandwidth with 500MHz.

Then each forward link signal is connected to appropriate sending module 632 by switch 628.Sending module can comprise upconverter (UC), and satellite-based transmission amplifier is arranged at upconverter (UC) afterwards, upconverter by IF forward link signal up-conversion to be suitable for the transmission frequency.According to embodiments of the invention, satellite-based transmission amplifier can be travelling-wave tube amplifier (TWTA), and it is amplified the signal as single-carrier signal effectively.Here, each satellite-based transmission amplifier is used to and only amplifies a single-carrier signal, and this allows amplifier more effectively to be operated.This design allows the very effective use of satellite-based transmission amplifier.

Thus, each satellite-based transmission amplifier produces the single-carrier signal of amplifying, and then with antenna, launches the single-carrier signal of this amplification to form the spot beam that arrives the earth.Thus, this spot beam has the earth surface overlay area.User terminal in specific earth surface coverage zone can receive forward link signal.Here, the output by single satellite-based transmission amplifier forms each spot beam.In other words, the output that does not need to merge a plurality of transmission amplifiers forms each spot beam.This has got rid of power loss and has allowed more effectively to operate satellite-based transmission amplifier.

The single-carrier signal of each satellite-based transmission amplifier and on the bend pipe repeater novelty of the single satellite-based transmission amplifier of each spot beam use the ratio optimized satellite place data capacity and power consumption so that the remarkable improvement of satellite equipment acquisition performance.

The frequency reuse of business and gateway wave beam

According to embodiments of the invention, proposed satellite system and adopted multistage frequency reuse to maximize the use of usable frequency bandwidth.Reuse and make different business beams can take common frequency band except applying frequency in a plurality of business beams, in the zone that system is further separated mutually by overlay area gateway is positioned at business beam between business beam and feeder beam applying frequency reuse.In addition, also can be in a plurality of feeder beam applying frequency reuse to allow the further increase of spectrum efficiency.Below in the system of example discussed below, will explain in more detail so multistage frequency reuse.

With reference to the system of the example shown in figure 6A and 6B, Star Network comprise 15 independently feeder beam to support 60 business beams.Thus, each feeder beam is corresponding to four business beams.Here, all maintain this ratio in up link and down link direction.On forward direction, each uplink feeder beam of satellite relay is to generate four downlink traffic wave beams.On the back direction, every four the uplink service wave beams of satellite relay are to generate a downlink feeder beam.Thus, Star Network can be counted as having 15 groups of signals, and every group comprises a uplink feeder beam, a downlink feeder beam, four uplink service wave beams and four downlink traffic wave beams.

Figure 14 means the frequency reuse plan 400 according to the example of embodiments of the invention employing.Figure 14 means only to 1 group of frequency reuse in 15 groups of signals discussed above.Yet according to a preferred embodiment of the invention, identical frequency reuse plan 400 can be applied to each group of 15 groups of signals.Particular value shown in Figure 14, for example specified channel is selected as example.Other value also can be used within the scope of the invention.

At first, the uplink feeder beam 4002 that comprises 4 carrier waves is sent to satellite 105 by four various combinations (4 " color ") that utilize foregoing frequency and polarization from gateway terminal 115.Here, use two different 500MHz uplink frequency channel, 27.5GHz-28GHz and 29.5GHz-30GHz, and two different polarization, right-handed circular polarization (RHCP) and left-hand circular polarization (LHCP) form this 4 colors.

Four downlink traffic wave beams 4004 below are shown and from satellite 105, are sent to user terminal 130.Four colors shown in existence, used two different 500MHz downlink frequency channels, 17.7GHz-18.2GHz and 19.7GHz-20.2GHz, and two different polarization RHCP and LHCP form this four colors.Here, because four downlink traffic wave beams 4004 have space diversity (spatial diversity) each other, this is conducive to frequency reuse, for can how to use 4 colors to have different selections.In one embodiment, use whole four colors, each color is for different downlink traffic wave beams 4004.In another embodiment, only use two colors for four downlink traffic wave beams 4004.For example, mean that (1) 17.7GHz-18.2GHz and LHCP and these two colors of (2) 17.7GHz-18.2GHz and RHCP can be for sending whole four downlink traffic wave beams 4004.Thus, can use identical 500MHz bandwidth to send downlink traffic wave beam 4004, but, by polarity (LHCP and RHCP) the alternate allocation downlink traffic wave beam 4004 adjacent to physics, allow the wave beam difference of tight spacing each other to come.Other variations are possible and in scope of the present invention.

Four uplink service wave beams 4006 below are shown and from user terminal 130, are sent to satellite 105.Here, can be reused to send four uplink service wave beams 4006 for identical four colors that send uplink feeder beam 4002.Particularly, use two different 500MHz uplink frequency channel, 27.5GHz-28GHz and 29.5GHz-30GHz, and two different polarization RHCP and LHCP form this four colors.This scheme is feasible, because send the gateway 115 of uplink feeder beam 4002, is positioned at positions different from the user terminal 130 that sends uplink service wave beam 4006 on the earth.Thus, even may send uplink feeder beam 4002 and uplink service wave beam 4008, the receiving uplink feeder beam 4002 that the directional antenna on satellite 105 also can separate and uplink service wave beam 4008 with identical uplink frequency and polarization.In addition, because four uplink service wave beams 4006 have space diversity each other, this is convenient to frequency reuse, for can how by these four colors, to send uplink service wave beam 4006, has different options.For example, can use whole four colors, or can only use 2, or can adopt some variations.This situation is similar to the top description to four downlink traffic wave beams 4004.

The downlink feeder beam 4008 that comprises four carrier waves finally is shown and from satellite, is sent to gateway terminal.Here, downlink feeder beam 4008 can be reused to send for identical four colors that send downlink traffic wave beam 4004.Particularly, use two different 500MHz uplink frequency channel, 17.7GHz-18.2GHz and 19.7GHz-20.2GHz, and two different polarization RHCP and LHCP form this four colors.This scheme is feasible, because the gateway of receiving downlink feeder beam 4008 is positioned at positions different from the user terminal of receiving downlink business beam 4004 on the earth.That is, gateway is arranged in feeder beam overlay area that can receiving downlink feeder beam 4008.Differently, user terminal 130 is arranged in business beam overlay area that can receiving downlink business beam 4004.Thus, downlink feeder beam 4008 and downlink traffic wave beam 4004 can be reused identical down-link frequencies and polarization, and still the recipient by expection separately receives.

As previously mentioned, can be to the identical frequency reuse plan 400 of each group application of 15 groups of signals.That is the whole system that, comprises 15 uplink feeder beam, 4004,60 uplink service wave beams 4006 of 4002,60 downlink traffic wave beams and 15 downlink feeder beam 4008 can adopt identical frequency reuse plan 400 simultaneously.This be by utilize the space diversity that may exist in 60 business beam 205 overlay areas, by 15 feeder beam 225 overlay areas are located enough from 60 business beam 205 overlay areas away from and by locating to such an extent that enough far obtain each other by 15 feeder beam 225 overlay areas.Thus, realize the frequency reuse of three different stages.At first, realize frequency reuse between business beam.Secondly, realize frequency reuse between business beam and feeder beam.Again, realize frequency reuse between feeder beam.

Gateway is arranged away from business beam

According to embodiments of the invention, proposed to have the satellite system 100 of effective layout of gateway terminal 115.As previously mentioned, the space diversity between gateway and user terminal is conducive to the frequency reuse between business beam 205 and feeder beam 225.Equally, the space diversity between gateway also is conducive to the frequency reuse between feeder beam 225.The layout of gateway can be considered these and other factors.

In one embodiment, a plurality of different business wave beams 205 overlay areas (for example 60 business beam overlay areas) can be designed to only provide the selected part of tactic to cover to overlay area.Generally speaking, to geographic area, provide the typical satellite system of communication to attempt to obtain whole coverings, make business available to whole zone.Yet, according to the present embodiment of the present invention, satellite system can be designed as only provides the selected part of tactic to cover to specific region.For example, overlay area can comprise the region in the western part, east and the south that comprise the U.S..The specified coverage area that selecting business wave beam 205 is supported by different way.For example, overlay area can be corresponding to the position of " service not enough " (" underserve "), but in such position, may exist a large amount of population high bandwidth network accesses also unavailable.

According to embodiments of the invention, one or more gateways are placed away from the overlay area of business beam 205, so that the frequency reuse between business beam 205 and feeder beam 225.In schematic system as above, suppose that 60 up links and downlink traffic wave beam have the Zhong De overlay area, region in western part, east and the south of crossing over the U.S..Then 15 gateways are placed on to the region away from the covering region of business beam, for example middle part of the U.S..

In addition, may need for example, to place enough far each other by a plurality of gateways 115 (15 gateways), make and can reuse by further proportion between different feeder beam 225.For example, the minimum range between each gateway 115 and its any neighboring gateway may need to be placed with 400 kilometers.Thus, neighboring gateway can be used identical channel and be not interfering with each other.

The further possible restriction of the layout of gateway 115 is related to and the physical proximity of high frequency band Web portal more.For example, can connect and place gateway 115 near fiber optic network.This allows gateway to have fast and the network insertion of robust (Robust), makes and needs the data communication of access network not to be disturbed.According to one embodiment of present invention, except other needs, each gateway is placed on apart from fiber optic network and connects in 50 kilometers distances.

Another possible restriction to the layout of gateway 115 relates to regional weather form.Gateway may need to be placed on and experiences the decline zone of (rain fade) of light rain.Illustrate, each gateway 115 may need to be placed on whole rain on uplink frequency and decline and be less than on the position of decline of 10dB for time of 99.99%.This has further limited the selection of the possible position of gateway terminal.

Thus, according to embodiments of the invention, the layout of gateway 115 may be considered for example a plurality of factor as above.Although meet so a plurality of restrictions, may make the placement of gateway 115 have more challenge, adopt the system of such restriction more easily to obtain remarkable overall performance.

The back of the body is carried Satellite Payloads on the back

According to an embodiment, the part of the total Pasteur's power (buss power) on communication satellite is used to support the satellite communication system 100 of version of the present invention.This technology is known as " back of the body is carried (piggy-back) on the back " pattern, allows whole satellite communication system as above or its part by the satellite support of also carrying other communication payloads.For example, if particular satellite has total Pasteur's power of available 15 kilowatts (KW), and this satellite had the payload of existing consumption 13KW Pasteur power, also remains so unnecessary Pasteur's power of 2KW on satellite.According to one embodiment of present invention, can be by with remaining 2KW Pasteur power, realizing satellite system as above or its part.Thus, be configured in the 2KW Pasteur power of the surplus on communication satellite as above the example system that 8 business beams and 2 corresponding feeder beam are arranged on forward direction and return link direction.

Additional payload can build independently satellite communication system.Alternatively, additional payload can build a part of satellite system.For example, as mentioned above, whole satellite system can be applied the feeder beam of 60 business beams 205 and 15 correspondences in forward link and return link direction.The part of such system can be corresponding to 8 business beams on aforementioned forward direction and return link direction and the feeder beam of 2 correspondences.All the feature of satellite system shows in system in fact in this section.

Additional payload can adopt the structure that is similar to the independent satellite framework of describing in embodiment as above.For example, at forward link direction, from gateway 115 to satellite, 105 each feeder beam 225 sent (for example can comprise four signals, by four " color ", meaned), these four signals produce the single-carrier signal of 4 separation that send as the disassociation service spot beam from satellite to arrive user terminal.The system that can adopt similarly other satellite architectural features to realize for the payload as additional is used.

Different execution modes is possible.Below as the purpose of example, an execution mode is briefly described.Here, additional payload comprises the Ka packet that be introduced into existing satellite buying.Such system can be carried out balanced design with a very high level, makes packet minimize the impact of physical Design, layout, weight and the power of whole design of satellites.The example market of this additional payload can be consumer's broadband market.This packet can have 10 spot beams, and each spot beam is approximate 0.35 half-power beam width (Half Power Beam Width, HPBW) of spending when sending and receiving.The TWTA redundancy should be identical with orbital lifetime.This system can be utilized two for 10 spot beams of feeder link to carry out four looks and reuse.The effective isotropic radiated power of packet (Effective Isotropic Radiated Power, EIRP) can be the every spot beam of 70dBW, and G/T can be the 27dB/ ° of every spot beam of K.Single transceiver (transponder) can be the broadband of 500MHz magnitude.Polarity can be circular, and alternately point can alternately be used left-handed and right-hand polarization.Input SFD can arrange from-105dB to-85dB with the 1dB step.

According to the present invention, by using " back of the body is carried on the back " pattern, add thus the payload of different sizes, to allow effective use of the unnecessary Pasteur's power on satellite.The designated parameter of the number of the spot beam of for example implementing can be according to the needs of system and difference.

The self adaptation of satellite uplink wave band is used

According to embodiments of the invention, the self adaptation of applied satellite uplink band is used.A schematic execution mode of such technology allows to use flexibly channel as less important frequency spectrum license holder's user terminal.Less important frequency spectrum license holder's the right sent on assigned frequency band is less important with respect to main frequency spectrum license holder.That is, no matter when main frequency spectrum license holder can the frequency band selected at it on transmitted signal, and be indifferent to other users.On the contrary, only, when main frequency spectrum license holder does not send on designated band, allow less important frequency spectrum license holder to send on the frequency band of this appointment.User terminal as less important frequency spectrum holder can utilize the self adaptation of the satellite uplink wave band of describing in different embodiments of the invention to use, to guarantee when another signal being detected, for example, while mainly permitting holder's signal, thereby carry out to send redistributing of channel, the satellite uplink transmission is moved to different frequency do not disturb mutually with main frequency spectrum license holder.

Figure 15 means the example system that the self adaptation of applied satellite uplink band is used according to one embodiment of present invention.Here, central location (teleprocessing unit, or remote terminal) 121 is controlled the transmission channel of user terminal (for example 130-a-1 and 130-a-2) use and the distribution of receiving channels.Central location 121 can be connected to gateway 115 by network 120.Central location 121 also can be connected to other gateways thus, to control larger satellite system.In optional embodiment, central location 121 can be contained in the gateway of gateway 115 for example.

Central location 121 distributes the transmission channel that sends Satellite uplink signals 145-a-1 and the receiving channels that receives satellite downlink signal 150 to user terminal 130-a-1.Similarly, central location 121 distributes the transmission channel that sends Satellite uplink signals 145-a-2 and the receiving channels that receives satellite downlink signal 150 to user terminal 130-a-2.According to embodiments of the invention, as described below, based on user terminal, this locality that sends frequency spectrum is observed and local visual report is returned to central location 121, central location 121 can adopt adaptation scheme by the transmission channel allocation to one or more user terminals.

In the transmission channel distributed, the transmission of the Satellite uplink signals 145-a-1 of user terminal 130-a-1 can be actually intermittently.For example, uplink signal can transmit the web-page requests of only asking the short pulse data.Thus, can in the transmission cycle of time-division, send Satellite uplink signals.That is, can on the duration, limit the cycle of each transmission.The cycle of transmission can separate by the time of not transmitting from user terminal 130-a-1 transmission.

User terminal 130-a-1 can monitor the transmission channel distributed between the transmission cycle of these time-divisions of Satellite uplink signals.That is, as user terminal 131-a-1, not when sending, it can monitor other signals from external source that the transmission channel of distribution may exist.Can there is dissimilar such external source, for example land mobile data service (LMDS) user 127.The situation that wherein may cause such scene is that to have utilized LMDS user 127 be that main frequency spectrum license holder and user terminal 130-a-1 are while being less important frequency spectrum license holder's the transmission channel of bandwidth when central unit 121 distributes.Thus, if, when LMDS user 127 is using the transmission channel of distribution, user terminal 130-a-1 is not used this channel.

Except monitoring the transmission channel distributed, user terminal 130-a-1 also monitors at least one out of band channel different from the transmission channel distributed.For example, user terminal 130-a-1 can also monitor one or more adjacent channels.Adjacent channel can be included in transmission channel a plurality of channels on every side of distribution.These channels can comprise the channel with the transmission channel of current distribution next-door neighbour, and other channels.The supervision of out of band channel contributes to detect other signals in wider frequency range, and for example signal 128.Relevant for can be by the potential frequency spectrum that is used in signal transmission of user terminal 130-a-1, this information allows to form more complete picture.

In one embodiment, user terminal 130-a-1 carrys out the sending and receiving satellite-signal with the first antenna 125-a-1, and uses the second antenna 126-a-1 to carry out the supervision of channel.Here, this double antenna is arranged and is allowed more easily to implement.The first antenna 125-a-1 can be the parabolic reflector antenna that points to satellite 150.Thus, the first antenna is suitable for the sending and receiving satellite-signal.The second antenna 126-a-2 can be the dipole antenna designed for ground signal.Secondary signal can be suitable for detecting the ground signal of advancing along horizontal direction well, the signal 128 for example sent from LMDS user 127.This is only an example arrangement.Can carry out modification within the scope of the invention.

When the signal that for example detects from LMDS user 127 for example signal 128, user terminal 130-a-1 notifies central location 121.This observed result of can operation report returning central location 121 completes.This observed result can generate by different way.As an example, user terminal 130-a-1 can periodically generate observed result automatically.As another example, central location 121 can be in appropriate period from user terminal 130-a-1 request observed result.In addition, can report observed result with different-format according to execution mode.Form can be Boolean, numerical value etc.In one embodiment, no matter the existence of another signal whether detected, all send observed result.In optional execution mode, just send observed result while the existing of another signal only being detected.

As response, central location 121 can be re-assigned to user terminal 130-a-1 different transmission channels, with the source of the signal detected, disturbs mutually avoiding.In this case, frequency is redistributed for preventing from disturbing the signal 128 of LMDS user's 127 transmissions that may be main frequency spectrum license holder.Central location 121 can be determined new transmission channel for user terminal 130-a-1 by different way.In certain embodiments, this determines very simple, does not consider the supervision of carrying out on other user terminals.For example, can there is the default channel be assigned with.

In other embodiments, this is determined to have considered the supervision of carrying out on other user terminal.Some or all user terminals can be carried out channel and monitor and report back central location 121 by observed result.The overall frequency of the needs that then central location 121 can be based on having considered a plurality of user terminals is distributed and is decided.Thus, can the newly assigned transmission channel part that frequency is distributed as a whole will be determined to each user terminal.Simple example is described below as example.

Supposing that user terminal 130-a-1 is current is dispensed on that channel X is upper sends Satellite uplink signals, and has reported that it observes channel X and most other channels and for example, by other signals (from LMDS user signal 128), used and only have a specific channel Y not used by other signals.Further hypothesis user terminal 130-a-2 is current is dispensed on the upper transmission of channel Y Satellite uplink signals, and has reported that it observes channel Y and most other channels are not used by other signals.As response, central location 121 can be determined that optimum overall frequency is distributed and comprise user terminal 130-a-2 is re-assigned to the transmission channel except Y, thereby channel Y can be assigned to user terminal 130-a-1.For example, user terminal 132-a-2 can be redistributed into channel X, and user terminal 130-a-1 can be redistributed into channel Y., allow two user terminal operations and do not disturb other to represent main frequency spectrum license holder's signal user terminal is reached to the Combined Frequency plan by the observation considering to make at two user terminals.Certainly, this only relates to the simple case of two user terminals.The frequency distribution that relates to the more users terminal is also contained in scope of the present invention.

It should be noted that system discussed above, method and software are in fact only as example.Must emphasize that different embodiment can omit rightly, substitute or increase different processing or element.For example, be to be appreciated that in optional embodiment, can, to be different from above-mentioned order manner of execution, can add, omit or merge different steps.Equally, the feature of describing for certain embodiment also can from other different embodiment combinations.Different aspects and the assembly that can merge in a similar manner embodiment.In addition, should be emphasized that, technology is in development, and many assemblies only should not be interpreted as for example limiting the scope of the invention thus.

Provided specific detail so that the complete understanding of embodiment to be provided in specification.Yet, will be understood by those skilled in the art that embodiment can not need these specific detail and be implemented.For example, show known circuit, processing, algorithm, result and technology and there is no unnecessary details, to avoid indigestion embodiment.

In addition, be to be further noted that embodiment can be described to the processing by flow chart, structure chart or block diagram representation.Program process when although they can be described as operation, many operations can walk abreast or occur simultaneously.In addition, the order of operation can be rearranged.Processing stops when complete operation, but process, the extra step in the drawings that do not comprise may be arranged.

In addition, can mean one or morely for storing the device of data at this term " storage medium " or " storage device ", comprise read-only memory (ROM), random access memory (RAM), magnetic ram, core memory, magnetic disk storage medium, optical storage media, flash memory device or other computer-readable mediums for the information of storing.Term " computer-readable medium " is including, but not limited to portable or fixed-storage device, light storage device, wireless channel, SIM card, other smart cards, and various other media that can store, comprise or carry instruction or data.

In addition, can combine to realize embodiment by hardware, software, firmware, middleware, microcode, hardware description language or its.When realizing with software, firmware, middleware or microcode, carry out in the machine readable media that the program code of necessary task or code segment can be stored in storage medium for example.Processor can be carried out necessary task.

Described some embodiment, those of ordinary skill in the art is to be appreciated that and can uses various modifications, optional structure or equivalence to replace and do not depart from spirit of the present invention.For example, top assembly can be only the element of larger system, and wherein other rules can be replaced original rule or be revised application of the present invention.In addition, can consider to need a plurality of steps before said modules.Thus, top description should not be considered to the of the present invention scope of restriction by the claim definition.

Claims (13)

1. the method for the end of the first user in satellite system, described satellite system comprises first user terminal and the second user terminal, first user terminal and the second user terminal are less important frequency spectrum license holders, said method comprising the steps of:

Receive the distribution of the first transmission channel;

Send Satellite uplink signals in transmission cycle in time-division in the transmission channel of the first distribution;

Monitor the first transmission channel distributed between the transmission cycle of the time-division of Satellite uplink signals, may there be the ground signal of permitting the holder from main frequency spectrum in the transmission channel that this supervisions first distributes for determining the first transmission channel distributed;

Monitor the second transmission channel that distribute different from the first transmission channel distributed, the wherein said second transmission channel distributed is out of band channel, may there be the ground signal from main frequency spectrum license holder in the transmission channel that this supervision second distributes for determining the second transmission channel distributed, and wherein the second transmission channel distributed is assigned to the second user terminal;

Generate the first observed result, described the first observed result means to have ground signal in the definite first transmission channel distributed, and means not have ground signal in the definite second transmission channel distributed;

The second observed result in response to the first observed result and the generation of the second user terminal, reception is re-assigned to the indication of the transmission channel of the second distribution from the transmission channel of the first distribution, described the second observed result means not have ground signal in the second definite transmission channel distributed of the second user terminal, and means not have ground signal in the first definite transmission channel distributed of the second user terminal; And

Transmission channel in the second distribution sends the second Satellite uplink signals.

2. one kind for the method in the satellite system allocation of transmission bandwidth, comprises the following steps:

By the first transmission channel allocation, to the first user terminal, the first user terminal is less important frequency spectrum license holder;

By the second transmission channel allocation, to the second user terminal, the second user terminal is less important frequency spectrum license holder, and the second transmission channel distributed is different from the first transmission channel distributed;

In the first user end side, send Satellite uplink signals in transmission cycle in time-division in the transmission channel of the first distribution, monitor between the transmission cycle of the time-division of the Satellite uplink signals from the first user terminal during the first transmission channel distributed is with the transmission channel of determining the first distribution and may have the ground signal from main frequency spectrum license holder, monitor that the second transmission channel distributed is may exist the ground signal from main frequency spectrum license holder in the transmission channel of determining the second distribution, the wherein said second transmission channel distributed is out of band channel, generate the first observed result, described the first observed result means to have ground signal in the definite first transmission channel distributed, and mean to determine in the second transmission channel distributed and do not have ground signal, and the first observed result is reported to central location,

In the second subscriber terminal side, send Satellite uplink signals in transmission cycle in time-division in the transmission channel of the second distribution, monitor between the transmission cycle of the time-division of the Satellite uplink signals from the second user terminal during the second transmission channel distributed is with the transmission channel of determining the second distribution and may have the ground signal from main frequency spectrum license holder, monitor that the first transmission channel distributed is may exist the ground signal from main frequency spectrum license holder in the transmission channel of determining the first distribution, generate the second observed result, described the second observed result means not have ground signal in the definite second transmission channel distributed, and mean to determine in the first transmission channel distributed and do not have ground signal, and the second observed result is reported to central location,

In the central location side, in response to the first observed result of first user terminal report and the second observed result of the second user terminal report, the first user terminal is re-assigned to the transmission channel of the second distribution from the transmission channel of the first distribution, and make to send the first message, described the first message is that the indication of the transmission channel of the second distribution is conveyed to the first user terminal;

In the central location side, in response to the first observed result of first user terminal report and the second observed result of the second user terminal report, the second user terminal is re-assigned to the transmission channel of the first distribution from the transmission channel of the second distribution, and make to send the second message, described the second message is that the indication of the transmission channel of the first distribution is conveyed to the second user terminal;

In the first user end side, the first message of redistributing in response to reception and registration sends the second Satellite uplink signals in the transmission channel of the second distribution; And

In the second subscriber terminal side, the second message of redistributing in response to reception and registration sends the second Satellite uplink signals in the transmission channel of the first distribution.

3. method according to claim 2, the wherein said second transmission channel distributed comprises the adjacent channel adjacent with the transmission channel of the first distribution.

4. method according to claim 2, wherein said the first observed result indication land mobile data service user's existence.

5. method according to claim 2, wherein said first user terminal further can be used the first antenna to receive the satellite downlink signal in the receiving channels of the first distribution, and uses the second antenna to monitor the first transmission channel distributed.

6. method according to claim 5, wherein the first antenna is for receiving satellite signal, and the second antenna is for receiving ground signal.

7. one kind for the allocated bandwidth system in the satellite system allocation of transmission bandwidth, and described allocated bandwidth system comprises:

First user terminal and the second user terminal, first user terminal and the second user terminal are less important frequency spectrum license holders;

Central location, be used for and the first and second user terminal communications, central location for by the transmission channel allocation of the first distribution to the first user terminal to send Satellite uplink signals, and central location for by the transmission channel allocation of the second distribution to the second user terminal to send Satellite uplink signals, the second transmission channel distributed is different with the transmission channel of the first distribution;

Wherein, the first user terminal for sending Satellite uplink signals in the transmission cycle of transmission channel in time-division of the first distribution, monitor between the transmission cycle of the time-division of the Satellite uplink signals from the first user terminal during the first transmission channel distributed is with the transmission channel of determining the first distribution and may have the ground signal from main frequency spectrum license holder, monitor that the second transmission channel distributed is may exist the ground signal from main frequency spectrum license holder in the transmission channel of determining the second distribution, the wherein said second transmission channel distributed is out of band channel, generate the first observed result, described the first observed result means to have ground signal in the definite first transmission channel distributed, and mean to determine in the second transmission channel distributed and do not have ground signal, and the first observed result is reported to central location,

The second user terminal for sending Satellite uplink signals in the transmission cycle of transmission channel in time-division of the second distribution, monitor between the transmission cycle of the time-division of the Satellite uplink signals from the second user terminal during the second transmission channel distributed is with the transmission channel of determining the second distribution and may have the ground signal from main frequency spectrum license holder, monitor that the first transmission channel distributed is may exist the ground signal from main frequency spectrum license holder in the transmission channel of determining the first distribution, generate the second observed result, described the second observed result means not have ground signal in the definite second transmission channel distributed, and mean to determine in the first transmission channel distributed and do not have ground signal, and the second observed result is reported to central location,

Central location is in response to the first observed result of first user terminal report and the second observed result of the second user terminal report, the first user terminal is re-assigned to the transmission channel of the second distribution from the transmission channel of the first distribution, and make to send the first message, described the first message is that the indication of the transmission channel of the second distribution is conveyed to the first user terminal;

Central location is in response to the first observed result of first user terminal report and the second observed result of the second user terminal report, the second user terminal is re-assigned to the transmission channel of the first distribution from the transmission channel of the second distribution, and make to send the second message, described the second message is that the indication of the transmission channel of the first distribution is conveyed to the second user terminal;

The first user terminal response, in described the first message, sends the second Satellite uplink signals in the transmission channel of the second distribution; And

The second user terminal, in response to described the second message, sends the second Satellite uplink signals in the transmission channel of the first distribution.

8. allocated bandwidth system according to claim 7, the wherein said second transmission channel distributed comprises the adjacent channel adjacent with the transmission channel of the first distribution.

9. allocated bandwidth system according to claim 7, wherein said the first observed result indication land mobile data service user's existence.

10. allocated bandwidth system according to claim 7, wherein said first user terminal is further used for using the first antenna to receive the satellite downlink signal in the receiving channels of the first distribution, and uses the second antenna to monitor the first transmission channel distributed.

11. allocated bandwidth system according to claim 10, wherein the first antenna is used for receiving satellite signal, and the second antenna is for receiving ground signal.

12. the first user terminal in a satellite system, described satellite system comprises first user terminal and the second user terminal, and first user terminal and the second user terminal are less important frequency spectrum license holders, and described first user terminal comprises:

Receiver, send the signal of Satellite uplink signals for receiving indication first user terminal at the first transmission channel;

Reflector sends Satellite uplink signals for the transmission channel in the first distribution in the transmission cycle of time-division; And

Monitor, for monitoring between the transmission cycle of the time-division in the Satellite uplink signals from reflector that may there be the ground signal from main frequency spectrum license holder in the first transmission channel distributed with the transmission channel of determining the first distribution, for monitoring that may there be the ground signal from main frequency spectrum license holder in the second transmission channel distributed that is dispensed to the second user terminal with the transmission channel of determining the second distribution, wherein the second transmission channel distributed is different from the first transmission channel distributed, the wherein said second transmission channel distributed is out of band channel, to generate the first observed result, described the first observed result means to have ground signal in the definite first transmission channel distributed, and mean to determine in the second transmission channel distributed and do not have ground signal,

Wherein, reflector is further used for reporting the indication of the first observed result;

Receiver is further used for the second observed result in response to the first observed result and the generation of the second user terminal, receive indication the first user terminal is re-assigned to from the transmission channel of the first distribution the second distribution the transmission channel redistribute message, wherein said the second observed result means that the second user terminal is determined in the transmission channel of the second distribution and do not have ground signal, and means that the second user terminal is determined in the transmission channel of the first distribution and do not have ground signal; And

Reflector is further used in response to redistributing message, sends the second Satellite uplink signals in the transmission channel of the second distribution.

13. one kind for distributing the allocated bandwidth system of satellite system transmission bandwidth, described allocated bandwidth system comprises:

The dispensing device of first user end side, for send the Satellite uplink signals of expectation in the cycle of time-division according to the first transmission channel that is distributed in the first distribution, wherein the first user terminal is less important frequency spectrum license holder;

The dispensing device of the second subscriber terminal side, for send the Satellite uplink signals of expectation in the cycle of time-division according to the second transmission channel that is distributed in the second distribution, the second transmission channel distributed is different from the first transmission channel distributed, and wherein the second user terminal is less important frequency spectrum license holder;

The monitoring arrangement of first user end side, for monitoring that between the cycle of time-division may there be the ground signal from main frequency spectrum license holder in the first transmission channel distributed with the transmission channel of determining the first distribution, may there is the ground signal from main frequency spectrum license holder for the transmission channel that monitors the second distribution with the transmission channel of determining the second distribution, the wherein said second transmission channel distributed is out of band channel, and for sending the first indication of observed result, this observed result means to determine in the first transmission channel distributed that existing ground signal and expression to determine in the second transmission channel distributed does not exist ground signal,

The monitoring arrangement of the second subscriber terminal side, for monitoring that between the cycle of time-division may there be the ground signal from main frequency spectrum license holder in the second transmission channel distributed with the transmission channel of determining the second distribution, may there is the ground signal from main frequency spectrum license holder for the transmission channel that monitors the first distribution with the transmission channel of determining the first distribution, and for sending the second indication of observed result, this observed result means to determine in the second transmission channel distributed that not existing ground signal and expression to determine in the first transmission channel distributed does not exist ground signal,

Distributor, in the central location side, for receiving described the first and second indications, determine that in response to described the first and second indications the first user terminal is re-assigned to first the redistributing of transmission channel of the second distribution from the transmission channel of the first distribution, determine that in response to described the first and second indications the second user terminal is re-assigned to second the redistributing of transmission channel of the first distribution from the transmission channel of the second distribution, and make indication first the first message of redistributing be sent to the first user terminal, and make indication second the second message of redistributing be sent to the second user terminal,

The dispensing device of first user end side, further in response to described the first message, further sends the Satellite uplink signals of expectation in the cycle in time-division in the transmission channel of the second distribution; And

The dispensing device of the second subscriber terminal side, further in response to described the second message, further sends the Satellite uplink signals of expectation in the cycle in time-division in the transmission channel of the first distribution.

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