1. Technical Field
Aspects of this document relate generally to telecommunication systems and techniques for transmitting data across a telecommunication channel.
2. Background Art
Providing satellite coverage to a large geographic area is not a new concept for the satellite industry. However, the new High-Throughput Satellites (HTS) no longer use a single beam to cover the same geographic area, but instead use a collection of beams to cover a similar geographic area. In the prior art, there does not exist a way to relate the individual spot beams to allow the users distributed throughout the beams to be “related” in a way that reduces usage of overall usage of the bandwidth.
Traditionally, providing support for a hemispherical beam has been accomplished using a single transmission chain that includes a router or packet processor and a modulating device. To accomplish similar transmission using spot beams has traditionally required replication of a transmission chain as used for a hemispherical beam in each of the spot-beams, which results in duplication of data or the need to separate data in a manner that requires each chain to operate nearly independent of each other, thereby leading to an excessive use of resources and a lack of efficiency among the overall network.
Implementations of a method of creating a pseudo hemispherical beam using a plurality of individual spot beams may comprise receiving, by a single router or packet processor, user data from a plurality of users, processing the user data by the single router or packet processor using a QoS logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers, modulating the plurality of queues of data received from the single router or packet processor using a multiple-carrier modulator such that a single output comprising a plurality of individual spot beams results, each individual spot beam comprising at least one carrier signal, and having a unique center frequency and carrier signal configuration and transmitting the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers designated to receive the one or more queues of data.
Particular aspects may comprise one or more of the following features. The plurality of individual spot beams may comprise less duplicate data among the plurality of individual spot beams than that of an equivalent hemispherical beam configured to transmit the user data to the one or more predetermined remote receivers. The method may further comprise bridging the user data by the single router or packet processor. The method may further comprise routing the user data by the single router or packet processor. The method may further comprise spoofing or optimizing the user data by the single router or packet processor. The method may further comprise rate shaping the user data by the single router or packet processor. The queues of data among the plurality of queues of data may be dedicated transmission queues. Information may be designated for each queue based on feedback received from a secondary network. The carrier configuration of each spot beam may be a static configuration. The carrier configuration of each spot beam may be a dynamic configuration. The dynamic configuration may be configured to meet one or more network traffic requirements or to support one or more remote receivers during a beam-to-beam transition. The router or packet processor and multi-carrier modulator may be contained within a single unit. One or more of the data queues has at least one of a 1:1, 1:N, or an M:N redundant configuration. The output of the multi-carrier modulator may be at an intermediate frequency (IF) or a radio frequency (RF). One or more of the individual spot beam center frequencies and carrier signal configurations may be determined by an external control process.
Implementations of a system for creating a pseudo hemispherical beam using a plurality of individual spot beams may comprise a single router or packet processor configured to receive user data from a plurality of users and process the user data using a QoS logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers. The system may further comprise a multiple-carrier modulator configured to modulate the plurality of queues of data received from the single router or packet processor such that a single output comprising a plurality of individual spot beams results, wherein each individual spot beam among the plurality of individual spot beams is comprised of at least one carrier signal and has a unique center frequency and carrier signal configuration, and a transmitter configured to transmit the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers designated to receive the one or more queues of data.
Particular aspects may comprise one or more of the following features. The plurality of individual spot beams may comprise less duplicate data among the plurality of individual spot beams than that of an equivalent hemispherical beam configured to transmit the user data to the one or more predetermined remote receivers. The single router or packet processor may be further configured to bridge the user data. The single router or packet processor may be further configured to route the user data. The single router or packet processor may be further configured to spoof or optimize. The single router or packet processor may be further configured to rate shape the user data. The queues of data among the plurality of queues of data may be dedicated transmission queues. Information may be designated for each queue based on feedback received from a secondary network. The carrier configuration of each spot beam may be a static configuration. The carrier configuration of each spot beam may be a dynamic configuration. The dynamic configuration may be configured to meet one or more network traffic requirements or to support one or more remote receivers during a beam-to-beam transition. The router or packet processor and multi-carrier modulator may be contained within a single unit. One or more of the data queues may have at least one of a 1:1, 1:N, or an M:N redundant configuration. The output of the multi-carrier modulator may be at an intermediate frequency (IF) or a radio frequency (RF). One or more of the individual spot beam center frequencies and carrier signal configurations may be determined by an external control process.
Aspects and applications of the disclosure presented here are described below in the drawings and detailed description. Unless specifically noted, it is intended that the words and phrases in the specification and the claims be given their plain, ordinary, and accustomed meaning to those of ordinary skill in the applicable arts. The inventors are fully aware that they can be their own lexicographers if desired. The inventors expressly elect, as their own lexicographers, to use only the plain and ordinary meaning of terms in the specification and claims unless they clearly state otherwise and then further, expressly set forth the “special” definition of that term and explain how it differs from the plain and ordinary meaning. Absent such clear statements of intent to apply a “special” definition, it is the inventors' intent and desire that the simple, plain and ordinary meaning to the terms be applied to the interpretation of the specification and claims.
The inventors are also aware of the normal precepts of English grammar. Thus, if a noun, term, or phrase is intended to be further characterized, specified, or narrowed in some way, then such noun, term, or phrase will expressly include additional adjectives, descriptive terms, or other modifiers in accordance with the normal precepts of English grammar. Absent the use of such adjectives, descriptive terms, or modifiers, it is the intent that such nouns, terms, or phrases be given their plain, and ordinary English meaning to those skilled in the applicable arts as set forth above.
Further, the inventors are fully informed of the standards and application of the special provisions of 35 U.S.C. §112(f). Thus, the use of the words “function,” “means” or “step” in the Description, Drawings, or Claims is not intended to somehow indicate a desire to invoke the special provisions of 35 U.S.C. §112(f), to define the invention. To the contrary, if the provisions of 35 U.S.C. §112(f) are sought to be invoked to define the claimed disclosure, the claims will specifically and expressly state the exact phrases “means for” or “step for, and will also recite the word “function” (i.e., will state “means for performing the function of [insert function]”), without also reciting in such phrases any structure, material or act in support of the function. Thus, even when the claims recite a “means for performing the function of . . . ” or “step for performing the function of . . . ,” if the claims also recite any structure, material or acts in support of that means or step, or that perform the recited function, then it is the clear intention of the inventors not to invoke the provisions of 35 U.S.C. §112(f). Moreover, even if the provisions of 35 U.S.C. §112(f) are invoked to define the claimed disclosure, it is intended that the disclosure not be limited only to the specific structure, material or acts that are described in the preferred embodiments, but in addition, include any and all structures, materials or acts that perform the claimed function as described in alternative embodiments or forms of the invention, or that are well known present or later-developed, equivalent structures, material or acts for performing the claimed function.
The foregoing and other aspects, features, and advantages will be apparent to those artisans of ordinary skill in the art from the DESCRIPTION and DRAWINGS, and from the CLAIMS.
Implementations will hereinafter be described in conjunction with the appended drawings, where like designations denote like elements, and:
This disclosure, its aspects and implementations, are not limited to the specific components, frequency examples, or methods disclosed herein. Many additional components and assembly procedures known in the art consistent with the creation of a bonded pseudo hemispherical-beam operation for spot-beam environments are in use with particular implementations from this disclosure. Accordingly, for example, although particular implementations are disclosed, such implementations and implementing components may comprise any components, models, versions, quantities, and/or the like as is known in the art for such systems and implementing components, consistent with the intended operation.
This disclosure relates to implementations of a method of creating bonded pseudo hemispherical beam operation for spot-beam operation. The prior art for providing support for a hemispherical beam accomplishes this by using a single transmission chain. A transmission chain involves a router or packet processor and a modulating device. To accomplish a similar function would require replication of the transmission chain in each of the spot-beams; however, this introduces drawbacks such as data being duplicated or having to be separated in a manner that requires each chain to operate nearly independent of each other. Particular implementations described herein allow a single router or packet processor and modulator to support all beams simultaneously and coherently. Implementations provide a single transmission (creation) and processing point, but use the separate beams as a coherent transmission point to allow intelligent routing of the data to be transmitted to the appropriate beam for delivery and flow management (metering) of the traffic flowing out of each beam to ensure rate-based rules are adhered to for each of the transmission beams. Some implementations of the method can be employed for an electromagnetic emitting device, such as optical or Radio Frequency (RF) transmission equipment for point-to-point, point-to-multipoint and/or multipoint-to-multipoint operation.
This disclosure further relates to, but is not limited to, providing a bonded pseudo hemispherical beam operation for spot-beam environments over a repeating relay. Satellite coverage comes in a limited number of arrangements as follows: 1) global, in which the footprint (coverage area) of the satellite may cover a large portion of the earth (anywhere from ⅓ of the surface of the earth, continent, country or large geographic region); 2) hemispherical, such as an upper or lower latitude over ⅓ of the latitude of the surface of the earth, a portion of a continent, country or medium sized geographic region; and 3) spot beam, such as a small geographic region on the order of a 500 to 700 km. The spot beam is used for providing increased energy density for small satellite footprints where energy may be concentrated. The net result is improved satellite coverage. Spot beams are typically used for higher frequency operation such as Ku-Band (greater than 10 GHz) and above.
The ability for one to utilize a spot beam architecture to create contiguous beam coverage, thus providing similar results of a hemispherical beam may be accomplished, by bonding spot beams into a collection of coherent beams to represent the same coverage of a hemispherical beam. Particular implementations of this disclosure describe a method that results in coherent coverage and operation within the collection of spot-beams with the added advantage of the increased power density of a spot beam. The implementations described provide the ability for someone skilled in the art, e.g., a satellite operator or equipment manufacturer to use implementations described to produce a hemispherical-beam from a collection of spot-beams, resulting in increased performance and coverage over existing designs.
It is intended that particular implementations described herein are and may use, but are not limited to, field-programmable gate arrays (FPGA), digital signal processors, Application Specific Integrated Circuits (ASIC), or microprocessors.
Particular implementations described herein may be accomplished by a single packet or routing processing device where the number of receivers (listeners), which may be remotely located, are known either a priori or as a result of a return channel (remote to the transmission source) instructing the transmission source where each remote receiver (listener) is located in each of the spot beams. An aspect of novelty of the disclosed method relates to providing an intelligent decision as to where a remote receiver (listener) is located and utilizing a set of routing and rate-based decisions to the data that is to be delivered to the remote receiver (listener) and then delivering this data to the appropriate spot-beam to be modulated and then transmitted to the remote receiver (listener). One aspect of novelty disclosed is that implementations allow separate spot beams that are standalone and separated in frequency and polarization between the beams to appear to be a “patchwork” of beams that creates a contiguous coverage area as a remote receiver (listener) moves from one spot beam to another spot beam. In a particular embodiment, the remote receiver (listener) may be a mobile device such as an aircraft, ship or automobile or as known in the art, a Communications on the Move (COTM) platform. In an alternate embodiment, the remote receiver (listener) may be a device that is moved over a period of time where the device may be in one spot beam for a period of time, known as a dwell time, and then moved to a new location for a period of time. This is known in the art as Communications on the Pause (COTP). In another alternate embodiment, the remote receiver (listener) may be a device that is placed in a single beam and left to operate for an indefinite period of time. This is known in the art as a fixed terminal. All of the described modes of operation COTM, COTP, and fixed may be supported with implementations described herein.
Aspects of this disclosure relate to a method and system for the creation of bonded pseudo hemispherical-beam operation for spot beam environments.
Particular implementations of the creation of a bonded pseudo hemispherical-beam operation using spot beams are disclosed herein and may be specifically employed in satellite communications systems. However, as will be clear to those of ordinary skill in the art from this disclosure, the principles and aspects disclosed herein may readily be applied to any electromagnetic (such as for example, IF, RF and optical) communications system, such as a terrestrial broadcast network without undue experimentation.
As can be seen in
Another aspect of novelty of some implementations of the methods disclosed herein is that the bandwidth allocated to any one spot beam or user within a spot beam may be controlled by an external control method or system. The input control may be provided by user input or an autonomous system that provides feedback to the disclosed systems and methods.
As can be observed in
Another aspect of novelty relates to the bonding of the routing or packet processing coupled with the creation of the modulated carrier, either intermediate frequency (IF) or radio frequency (RF), allows the most efficient use of the spectrum. In some implementations, two separate devices may be used. One device may be the routing or packet processor and a second device may be a modulator with multiple carriers, where the router or packet processor prepares the information to be supplied to a downstream modulator with multiple carriers. In an alternate embodiment, the routing or packet processor and modulator with multiple carriers may be a single device in which both functions (routing or packet processing and modulation) are done in a same physical unit.
In an alternate embodiment, as shown in
The following are particular implementations of the use of the secondary carrier techniques provided as non-limiting examples.
A satellite earth station is configured to operate on a Ku-Band spot-beam satellite that contains a plurality of spot-beams resulting in coverage that appears to be a single cohesive beam. An implementation of the described method allows the mobile device that may start on beam 1 and move to beams 5, 6, 7 and 9 in a manner in which the antenna simply points to the same satellite, but as the coverage ends on beam 1 (first beam), through the use of an implementation of the described method, the service then moves to beam 5, and then to 6, and 7 and finally to 9. The mobile device only needs to ensure the antenna remains pointed to the desired satellite, but the traffic will be switched from beam-to-beam in a manner that appears to provide service within the same beam. As the mobile terminal moves the route processing and modulating equipment, using an implementation of the described method, resources may be accounted and re-allocated resources on each beam for each beam transition.
In particular implementations of the system described in example 1, an earth surface vessel (ship) is slowly steaming from Europe to North America and will cross three beams, numbered 1, 2 and 3. The coverage is provided by a single spot beam satellite, but requires the ship to move through three beams. The ship starts on beam 1, and using an implementation of the described method, the user data traffic remains in carrier 1 for beam one. Once the ship steams from beam 1 to beam 2, using an implementation of the described method, the traffic is then transitioned to beam 2. Once the ship steams from beam 2 to beam 3, using an implementation of the described method, the traffic is then transitioned to beam 3 and remains in beam 3 until it reaches North America. As the mobile terminal moves the route processing and modulating equipment, using an implementation of the described method, resources may be accounted and re-allocated resources on each beam for each beam transition.
A satellite earth station is configured to operate on a Ku-Band spot-beam satellite that contains a plurality of spot-beams resulting in coverage that appears to be a single cohesive beam to support an aircraft that originates in Europe and flies to South America at 530 miles per hour (mph), and will cross 10 beams, numbered 1-10. The coverage is provided by a single spot beam satellite, but requires the aircraft to move through ten beams. The aircraft starts on beam 1, and using an implementation of the described method, the user data traffic remains in carrier 1 for beam one. Once the aircraft flies from beam 1 to beam 2, using an implementation of the described method, the traffic is then transitioned to beam 2. Once the aircraft flies from beam 2 to beam 3, using an implementation of the described method, the traffic is then transitioned to beam 3 and remains in beam 3, and continues to switch beam-to-beam until it reaches beam 10 and remains in beam 10 and lands in South America. As the mobile terminal moves the route processing and modulating equipment, using an implementation of the described method, resources may be accounted and re-allocated resources on each beam for each beam transition.
In particular implementations of the system described in example 3, earth station is configured to operate on a Ka-Band spot-beam satellite that contains a plurality of spot-beams resulting in coverage that appears to be a single cohesive beam to support an aircraft that originates in Europe and flies to North America and will cross 5 beams, numbered 1-5. The flight then continues to South America and will cross 5 beams, numbered 6-10. The coverage is provided by a single spot beam satellite, but requires the aircraft to move through ten beams. The aircraft starts on beam 1, and using an implementation of the described method, the user data traffic remains in carrier 1 for beam one. Once the aircraft flies from beam 1 to beam 2, using an implementation of the described method, the traffic is then transitioned to beam 2. Once the aircraft flies from beam 2 to beam 3, using an implementation of the described method, the traffic is then transitioned to beam 3 and remains in beam 3, and continues to switch beam-to-beam until it reaches beam 5 and will remain in beam 5 while in North America. Once the aircraft leaves North America and flies toward South America, the aircraft then moves to beam 6 and continues to switch through the beams until it reaches beam 10 and remains in beam 10 and lands in South America. As the mobile terminal moves the route processing and modulating equipment, using an implementation of the described method, resources may be accounted and re-allocated resources on each beam for each beam transition.
In places where the description above refers to particular implementations of telecommunication systems and techniques for transmitting data across a telecommunication channel, it should be readily apparent that a number of modifications may be made without departing from the spirit thereof and that these implementations may be applied to other to telecommunication systems and techniques for transmitting data across a telecommunication channel.
This document claims the benefit of the filing date of U.S. Provisional Patent Application No. 61/907,319, entitled “Bonded Pseudo Hemispherical-Beam Operation for Spot Beam Environments” to Wallace Davis et al., which was filed on Nov. 21, 2013, the disclosure of which is hereby incorporated entirely by reference herein.
Number | Date | Country | |
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61907319 | Nov 2013 | US |