WO2011070224A1 - Appareil et procédés permettant de fournir à des dispositifs mobiles des informations concernant des canaux de communication disponibles lors d'un déplacement le long d'un trajet géographique - Google Patents

Appareil et procédés permettant de fournir à des dispositifs mobiles des informations concernant des canaux de communication disponibles lors d'un déplacement le long d'un trajet géographique Download PDF

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Publication number
WO2011070224A1
WO2011070224A1 PCT/FI2010/050873 FI2010050873W WO2011070224A1 WO 2011070224 A1 WO2011070224 A1 WO 2011070224A1 FI 2010050873 W FI2010050873 W FI 2010050873W WO 2011070224 A1 WO2011070224 A1 WO 2011070224A1
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WIPO (PCT)
Prior art keywords
mobile device
path
network
along
channels available
Prior art date
Application number
PCT/FI2010/050873
Other languages
English (en)
Inventor
Mikko Uusitalo
Ari Ahtiainen
Timo Rantalainen
Pasi Rinne-Rahkola
Original Assignee
Nokia Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Corporation filed Critical Nokia Corporation
Priority to CN201080063657.2A priority Critical patent/CN102763443B/zh
Priority to EP10835542.1A priority patent/EP2510719B1/fr
Publication of WO2011070224A1 publication Critical patent/WO2011070224A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination

Definitions

  • the present disclosure relates to the field of unlicensed wireless communication, in particular, but not necessarily limited to, white-space devices (also known as WSDs), associated methods, computer programs and apparatus.
  • white-space devices also known as WSDs
  • Certain disclosed aspects/embodiments may relate to portable electronic devices, in particular, so-called hand-portable electronic devices which may be hand-held in use (although they may be placed in a cradle in use).
  • hand-portable electronic devices include so-called Personal Digital Assistants (PDAs).
  • PDAs Personal Digital Assistants
  • portable electronic devices may or may not be mobile cellular devices and/or white space devices.
  • the portable electronic devices/apparatus discussed in relation to, or according to one or more disclosed aspects/embodiments may provide one or more audio/text/video communication functions (e.g. tele-communication, video-communication, and/or text transmission (Short Message Service (SMS)/ Multimedia Message Service (MMS)/emailing) functions), interactive/non-interactive viewing functions (e.g. web- browsing, navigation, TV/program viewing functions), music recording/playing functions (e.g. MP3 or other format and/or (FM/AM) radio broadcast recording/playing), downloading/sending of data functions, image capture function (e.g. using a (e.g. in-built) digital camera), and gaming functions.
  • audio/text/video communication functions e.g. tele-communication, video-communication, and/or text transmission (Short Message Service (SMS)/ Multimedia Message Service (MMS)/emailing) functions
  • interactive/non-interactive viewing functions e.g. web- browsing, navigation,
  • Cognitive radio technologies present a possible way to alleviate this problem. These technologies help devices to collect information regarding available spectrum usage based on the nature of the device as well as the user environment, and to use that information to more efficiently share the spectrum with other devices.
  • all unlicensed white-space devices must include geographical location technology that allows the device to determine its location and to match the current location of the device against a pre-existing database of available channels corresponding to that geographical area.
  • Figure 1 illustrates a channel availability database as presently known in the art.
  • such databases cross reference geographical areas with white-space channels available for use within specific sub-regions of that geographical area (e.g. an area is divided into smaller regions or cells).
  • a geographical area such as a country, country state, etc
  • a geographical area may be dissected or sub-divided into a plurality of sub-regions or cells within the database.
  • Each of these sub-regions may have a specific set of white- space channels that may be usable within that sub-region.
  • FIG 1 illustrates a channel availability database as presently known in the art.
  • each sub-region contains an indication whether channel/band 'A' and/or 'B' is available for use within each particular sub-region.
  • Geographical areas and channels recorded by these databases are, at least in some current channel availability databases (such as those in the US), divided up so as to be denoted by rectangular (e.g. 50m-by-50m or 100m-by-100m) geographical sub- regions or grid points (as in this example the channel availability database is in the form of a grid, with each geographical sub-region being a regular shaped grid point or box). In the US at least, this is to be in conformity with current FCC rulings, but other regions may have different standards and implement their availability database(s) differently.
  • These databases operate on the principle that, if the geographic location of a particular white-space device is known, then the channels available for use by that white-space device can be identified by comparing the geographical location of the white-space device to the geographical area represented by the database. Where the geographic location of the white-space device matches up/overlaps with one or more geographical sub-regions, the channels available for use by that white-space device being in the particular determined geographical location are thereby determined.
  • some white-space devices may determine their location via an onboard GPS system, or they may utilise local Wi-Fi networks to establish their position. Others may actually be geographically fixed and therefore they know their exact location anyway.
  • the geographic location of the white-space device is encoded using Geography Markup Language (GML) which is a standard used to universally encode and transmit geographical location of such devices.
  • GML Geography Markup Language
  • the database can verify which channels are available for use within the area the white-space device has identified it is located in.
  • the database should only inform the white-space device of channels that can be used without interference with other devices, primary users of such devices and protected entities (for example, entities/devices operating on frequencies/bandwidths that are already allocated to a particular use). This may sometimes entail informing a white-space device that no channels are available where necessary. This is to ensure that unlicensed use of allocated white-space frequencies does not interfere with already established frequency use in a particular area or locality.
  • the FCC also requires new unlicensed white-space devices to include spectrum-sensing technology allowing them to detect the presence of other signals in their vicinity. For example, to detect if there are other localised wireless transmission/reception sources in their vicinity that the white-space devices could interfere with if they operated on these frequencies. Such information is constantly in flux and unpredictable, and therefore is not typically logged in a channel availability database. Therefore the white-space devices must conduct their own localised survey of their location/area to verify white-space channels suitable for them to operate over. There are other conditions and stipulations set forth by the FCC ruling/standard for unlicensed white-space devices. These would be clearly understood by a skilled person based on the documents produced by the FCC on such matters.
  • US 2009/180359 (Alcatel Lucent) describes a method of operating a cognitive radio device and also a cognitive radio device. This document is also related to databases with information on choosing radio parameters.
  • US 2009/088089 (Microsoft) describes communication methods that use control channel negotiated intermittent wireless communication using historical information.
  • JP 2005-236818 (SonyEricsson) describes wave environment information server that provides for radio wave environment notification for mobile devices/terminals.
  • an apparatus configured to:
  • This indication may be in advance of actual travel along predicted geographic path.
  • the advance indication may be provided at the initial outset of a journey, or at some time into a journey e.g. whilst the device is still in the first cell of the predicted journey or before it has crossed into another (e.g. an adjacent) cell.
  • the prediction may be updated at intervals (e.g. based on deviation from the current prediction or at regular predetermined time/distance travelled intervals) along the journey.
  • the apparatus may be located in the mobile device or fixed in the cell network (e.g. part of a network server/database), and/or distributed between the mobile device and the fixed cell network.
  • the plurality of cells may include each of the cells along the geographic path, or some of the cells that lie along a portion of the path (which may or may not be adjacent to one another).
  • the cells may define or lie along subsections of the geographic path.
  • the geographic path may be made up of a plurality of path segments, each lying wholly within a single cell.
  • the apparatus may be configured to:
  • the apparatus determine one or more radio channels available for use by the mobile device that are common to a plurality of the cells that the path extends across; and provide, in advance, an indication of the one or more common radio channels available for use by the mobile device along the geographic path in the plurality of cells along the path.
  • This allows the apparatus to identify, in advance, cells which share a common available channel/channels with each other for a given mobile device. Such cells may be adjacent to one another, or they may not necessarily be adjacent to each other, (for example, they may be separated by one or more further intermediate cells e.g. if there are no unlicensed/available/unauthorised channels in an adjacent cell).
  • the predicted geographic path signalling may provide an indication of one or more of: a motion vector of the mobile device, a probable route of the mobile device, a user defined geographic path to be taken, a pre-determined route of the mobile device, a predetermined destination of the mobile device, and an initial location of the mobile device.
  • the predicted geographic path signalling may indicate a predicted geographic path that is at least a portion of a longer (e.g. predicted) journey.
  • a journey may represent a complete and simplified movement of a device along a particular route from an origin to a destination.
  • a predicted geographic path may represent at least a portion of this journey, or even the route.
  • a predicted geographic path may cover some or all of a complete journey.
  • the predicted path may be and/or may represent the entire route/journey to be taken by the mobile device, or it may be a portion of a longer route/journey to be taken by the mobile device. This portion may be the beginning, middle, or end of a journey, or anywhere in between the beginning and end of a journey.
  • One or more respective predicted paths may be provided to describe the entire route/journey to be taken. Some or all of these may be provided in advance. Some or all of these may be provided at points throughout the journey.
  • the apparatus may be configured to receive updated predicted geographic path signalling throughout the journey of a mobile device.
  • the apparatus may be configured to provide the indication of the one or more channels available for use in advance of the mobile device moving along the geographic path, or when the device is in a cell corresponding to an initial part of the path.
  • the apparatus may be configured to, for a locally defined network comprising a particular plurality of mobile devices, one of which is configured to act as a master node for the other mobile devices of the network:
  • the apparatus may be configured to share the relevant available channel information with some or all of the devices in a network. For example, if the network is represented by a single master node mobile device to the apparatus, then the apparatus may be configured to provide the channel availability indication for the network to the master node device, which would then share the channel availability indication with the rest of the network.
  • Each cell may be representative of one or more of: cells of a cellular mobile telephone network, cells/geographical regions of a white-space device database, cells/geographical regions of a television broadcast network, or the like.
  • the apparatus may be configured for identification of available white-space channels for one or more mobile white-space devices, wherein the mobile device is a mobile white- space device, and wherein the cells define a particular set of white-space radio channels available for use by a mobile white-space device in respective cells.
  • the cells may define a particular set of unlicensed radio channels available for use by a mobile device in that cell.
  • the unlicensed radio channels may be defined as unlicensed or unauthorised for use by one or more of: a particular radio network (e.g. 2G, 2.5G, 3G, GSM, TDMA, WCDMA, CDMA, etc), a particular radio network operator, a particular device or radio network user, a particular mobile device owner, a particular user of a network of mobile devices, a TV broadcaster/transmitter/receiver.
  • a particular radio network e.g. 2G, 2.5G, 3G, GSM, TDMA, WCDMA, CDMA, etc
  • a particular radio network operator e.g. 2G, 2.5G, 3G, GSM, TDMA, WCDMA, CDMA, etc
  • a particular radio network operator e.g. 2G, 2.5G, 3G, GSM, TDMA, WCDMA, CDMA, etc
  • an apparatus comprising:
  • each cell defining a particular set of radio channels available for use by the mobile device in that cell;
  • a system comprising the apparatus of the first aspect and a mobile device, the apparatus/mobile device configured to:
  • each cell defining a particular set of radio channels available for use by the mobile device in that cell;
  • the mobile device may be configured to act as a master node, wherein the indication of available channels for use by the master node mobile device also defines the channels available for use by the other mobile devices of the network.
  • a single device of the plurality in the network acting as a master node can represent an entire locally defined network at the apparatus.
  • the mobile device may be configured to make use of unlicensed radio channels, such as white-space channels (as defined by the FCC or other national licensing authorities), etc.
  • the apparatus may be configured to consider the number of changes in channel selection as the device is to travel (or travels) along the predicted path to minimise one or more: channel availability requests, channel switches between respective cells, power consumption by the mobile device, bandwidth use by the mobile device and/or the apparatus itself.
  • the apparatus may be configured to provide an advance indication of one or more channels available for use by the mobile device that corresponds to minimising one or more of: channel availability requests, and power consumption by the mobile device.
  • the method may comprise, for a locally defined network comprising a particular plurality of mobile devices, one of which is configured to act as a master node for the other mobile devices of the network:
  • a computer readable medium comprising computer code stored thereon, the computer code configured to, when run, perform a disclosed method.
  • Corresponding computer programs for implementing one or more of the methods disclosed are also within the present disclosure and encompassed by one or more of the described embodiments.
  • the present disclosure includes one or more corresponding aspects, embodiments or features in isolation or in various combinations whether or not specifically stated (including claimed) in that combination or in isolation.
  • Corresponding means for performing one or more of the discussed functions are also within the present disclosure.
  • Figure 1 shows an illustration of the operation of an example of the prior art
  • Figure 2 shows an illustration of the apparatus according to a first disclosed embodiment
  • Figure 3 shows an illustration of the different elements of a journey to be undertaken by a mobile device in the context of the first disclosed embodiment
  • Figure 4a shows an illustration of the operation of the prior art
  • Figure 4b shows an illustration of a disclosed operation
  • Figure 5 shows a further disclosed embodiment
  • Figure 6 shows the operation of yet another disclosed embodiment
  • Figure 7 illustrates further the embodiment of Figure 6
  • Figure 8 shows a method of operation according to a disclosed embodiment
  • Figure 9 shows a schematic illustration of a computer readable media providing a program according to a disclosed embodiment
  • an apparatus for providing an advance indication of channels available for use by a mobile device travelling along a geographic path The path extends across two or more adjacent cells, with each cell defining a particular set of radio channels available for use by the mobile device in that cell.
  • the apparatus is configured to receive predicted geographic path signalling associated with prediction of the geographic path to be taken by the mobile device.
  • the apparatus is also configured to determine radio channels available for use by the mobile device along that path.
  • the apparatus is also configured to provide, in advance, an indication of the radio channels available for use by the mobile device along the geographic path in each respective cell along the path.
  • the discussed embodiments mainly relate to adjacent cells but it will be appreciated that other embodiments may not be limited to predictions based on adjacent cells (e.g. if there are no unlicensed/ available/unauthorised channels in an adjacent cell).
  • channel availability requests would need to be made by the device upon entering different cells or regions.
  • By providing an advance indication of available channels in the respective cells along the path it is possible to reduce the number of channel availability requests that would otherwise be necessary as the mobile device moves between cells.
  • With the provided advance indication of available channels channel selection over a particular geographic path can be planned in advance. By providing for selection of appropriate radio channels for use by the mobile device in advance of movement from one cell to another (e.g. movement between adjacent cells), it is possible to minimize and even optimise the number and frequency of such requests.
  • FIG. 1 schematically illustrates apparatus 100, which comprises an input 1 , a processor 2, a memory 3, and an output 4.
  • This apparatus could be part of a mobile device or be located at a network server remote to the mobile device (or have elements distributed between the two ends of such systems).
  • the input 1 is a wireless receiver, at least in this embodiment, that is capable of receiving the incoming signalling associated with a mobile device.
  • This wireless receiver can be a radio mast receiver or transceiver, or any other wireless receiver (such as an antenna or aerial) that is capable of receiving suitable electromagnetic radiation such as long and short radio waves, microwaves, or the like.
  • the input 1 is a physical electrical connection to a further receiver, or to a further system configured to receive and handle such (white-space) channel queries.
  • a purpose of the input 1 is to receive signalling associated with white-space devices so as to provide this onward to the processor 2.
  • the communication interface between mobile white-space devices and a relevant channel availability database could be, in some embodiments, over a hypertext transfer protocol (HTTP) link over the Internet.
  • HTTP hypertext transfer protocol
  • the processor 2 is an Application Specific Integrated Circuit (ASIC) specifically configured to perform the task of processing incoming signalling from the input 1 .
  • ASIC Application Specific Integrated Circuit
  • the processor is a general purpose CPU that is capable of performing the same tasks, or capable of performing further tasks as well.
  • the processor 2 comprises a plurality of separate integrated circuits that are provided to perform said tasks. These integrated circuits may be provided locally and together, or separately or even remote from one another.
  • the processor 2 has a first input pin to allow the processor 2 to be electrically connected to input 1 , a second output pin to allow the processor 2 to be electrically connected to output 4, and a third memory pin to allow the processor 2 to be electrically connected to memory 3.
  • This memory pin can be considered to be a memory interface of the processor to allow the processor 2 to access the memory 3.
  • the respective pins may be part of a multi-bit bus arrangement for interfacing the processor 2 to the other described components.
  • the memory 3 is a computer readable medium that has a channel availability database stored thereon (such as those databases discussed previously).
  • the memory is readable/writeable solid state memory.
  • the memory may be read only memory (ROM), or may even be a physical hard drive.
  • the memory 3 is to be electrically connected to the processor 2 via the memory interface of the processor 2 to allow the processor 2 to access the channel availability data stored on the memory 3.
  • the skilled person will appreciate that, as the memory is just providing the processor 2 with the data needed to determine channels available to particular white- space devices, there are other embodiments (not shown) in which the memory 3 providing the database may actually be distinct and separate from the apparatus 100, and may be just remotely accessed by the processor 2 of the apparatus.
  • the memory may still be a solid state memory or hard drive, but the memory providing the database may also be in the form of an electrical signal such as an online stored database.
  • the database may even be a collection of smaller databases that the processor is able to access via the memory interface.
  • the output 4 is a wireless transmitter for transmitting a response to a channel availability query, at least in this embodiment. In other embodiments it is a physical electrical connection to a further transmitter, or to a system that is set up to handle such channel availability queries (as mentioned briefly above).
  • the output 4 is to be electrically connected to the processor 2 to allow for electrical communication between the two components.
  • a purpose of the output 4 is to allow the processor 2 to communicate the channels it has determined as available onwards, e.g. to a transmitter and onto a white- space device, etc.
  • the input and output 1 , 4 are actually both part of the same transceiver that is configured to be able to receive signalling associated with white- space devices, and also to be able transmit a response to said signalling.
  • the input 1 is electrically connected to the input interface (not shown) of the processor 2
  • the output 4 is electrically connected to the output interface (not shown) of the processor 2
  • the memory 3 is electrically connected to the memory interface (not shown) of the processor 2. This is to allow the processor 2 to be in electrical communication with each of these elements.
  • the apparatus is formed on a printed circuit board (PCB, but this may also be a printed wiring board - PWB).
  • the processor 2 and memory 3 are actually soldered directly to the PCB, and the respective electrical connections between the pins of the processor 2 and the input 1 , output 4, and memory 3 are also formed via soldering.
  • a multi-bit bus is provided to electrically connect the processor 2 to the respective components 1 , 3 & 4.
  • the PCB provides a push-fit integrated circuit (IC) connector (not shown) for receiving the processor 2 and soldering lugs connected to this connector for allowing direct connection of the other components to the processor 2 (once push-fit into the IC connector).
  • screw terminals may be used to connect the various components together.
  • the processor 2 is actually formed within a module (for example, being formed within epoxy resin) and the pins of the processor 2 connected to external wire conductors that allow for connection to the other components (input 1 , output 4 and memory 3).
  • a module for example, being formed within epoxy resin
  • the pins of the processor 2 connected to external wire conductors that allow for connection to the other components (input 1 , output 4 and memory 3).
  • unlicensed radio channels primarily come under the term 'white-space', but it will also be appreciated that some radio channels can be defined as unlicensed or unauthorised for use by different parties other than white-space device users.
  • unlicensed radio channels may be unlicensed for use by a particular radio network (e.g. 2G, 2.5G, 3G, GSM, TDMA, WCDMA, CDMA, 4G, WLAN etc), a particular radio network operator (e.g.
  • a channel availability query will usually only happen once on start up to establish appropriate channels for use.
  • these channel availability requests need to be performed every time the device moves from one region/cell into another. This is to be in accordance with present FCC rulings/standards.
  • device D is moving between origin A, and destination B.
  • the mobile device may belong to a user who is going from their home at point A, to their workplace at point B. This may involve a specific 'route' R from A to B, i.e. taking specific roads, streets, motorways, trains, buses, or the like, to get from A to B.
  • a specific 'route' R from A to B, i.e. taking specific roads, streets, motorways, trains, buses, or the like, to get from A to B.
  • a device D may take a very specific route R, this may be represented more simply and more succinctly than the very specific route R actually taken.
  • Figure 3 it can be seen that although the device is moving along a specific route R, the movement can be summed up as a direct 'journey' J from A to B, although in reality the actual journey may be more indirect.
  • This direct ' journeyney' J is a simpler way of describing the overall journey/movement that has taken place.
  • a journey J may be described as a direct line from origin A to origin B, but it may simply be a smoother representation of the more complex route R actually taken by the device.
  • the journey J is intended to represent the total route R taken across a geographic area made up of individual cells/regions (as described above).
  • the predicted geographic path is a prediction of at least a part of the route/journey to be taken by a mobile device.
  • the apparatus 100 In order for the apparatus 100 to provide an advance indication, it is necessary for it to receive signalling that indicates the predicted movement to be taken by a mobile device D.
  • the predicted 'geographic path' P of the device the accuracy of which will depend on a number of features including the technique used to make the calculation/prediction and the data available for use in the calculation/prediction.
  • the predicted geographic path P may actually represent the entire journey J and/or the entire route R to be taken by the device D. This prediction may, of course, need to be updated during the journey to reflect the actual route taken (e.g. based on deviation from the earlier/previous prediction).
  • a mobile white-space device For other devices and/or journeys, it may not be possible to for a mobile white-space device to predict an entire journey J from start to end. For example, where GPS is not used/available, where no destination has been entered by the user, where only the present location at any given moment is known and being tracked, where no final destination is determined, etc.
  • predictions can still be made for at least a portion of the journey J at any given time i.e. for the current route R.
  • a subsection of the total journey J may be predicted at each step of the journey J to provide a current predicted geographic path P for the apparatus 100 which more closely resembles the actual route taken. In the context of the disclosed embodiments, we have used this term to represent at least a portion of a longer journey J.
  • GPS navigation may provide a clear way of identifying a complete journey to be taken by a device.
  • GPS may provide for tracking of the device along the (as yet) unknown journey.
  • Other technologies that allow for tracking of movement of a mobile device could also be used (e.g. mobile triangulation, etc).
  • Another possibility is to use a determined motion vector to provide a predicted geographic path in the form of an ellipsoidal uncertainty area around the location of the device, with the longer axis in the direction of the motion vector. This would allow for error in the prediction of the geographic path to be taken. This ellipsoidal prediction of movement is illustrated in Figure 3.
  • the FCC regulation for the US TV white spaces is primarily directed towards semi- portable devices (such as wireless access points at homes), which need to contact the database each time, when they have been moved more than 50m.
  • semi- portable devices such as wireless access points at homes
  • this scheme is too rigid and presents several problems.
  • Figure 4b shows an illustration of the operation of the first embodiment.
  • the device D is also moving from origin A to destination B.
  • the mobile device D is configured to predict the geographic path to be taken by the device D, i.e. to predict the movement from A to B, and to provide this as predicted geographic path signalling to the database DB, which in this scenario is apparatus 100.
  • Apparatus 100 receives this signalling from the mobile device D via input 1 .
  • the processor 2 then electrically receives this signalling from the input 1 and uses the signalling to determine channels available for use by the mobile device D across respective cells along the predicted geographic path (indicated by the geographic path signalling).
  • the processor 2 accesses the channel availability database stored on electrically connected memory 3, and maps the predicted geographic path across the database to establish channels available for use by the device within each respective cell/region.
  • the processor 2 may not be directly associated with the memory 3 and may determine the predicted path to be taken by the mobile device D and provide this to an already existing white-space channel availability query server (with memory 3) to receive the advance channel availability data.
  • the processor 2/apparatus 100 may act as a further stage in the processing performed by such channel availability query servers.
  • the processor 2 Once the processor 2 has identified which cells of the database the device D is predicted to travel across, it can determine/identify the channels available for that device within each respective cell.
  • the processor 2 Once the processor 2 has established the channels available for the device D within each respective cell/region that the device D is predicted to travel across (based on the predicted geographic path to be taken by the device D), the processor 2 provides an indication of the channel availability to output 4 which transmits this to the device D.
  • the advance indication is provided via return indication signalling using the wireless transmitter connected to output 4. In other embodiments this may be provided onwards to a transmission system or further white-space channel availability query server/system.
  • the mobile device is therefore provided with an advance indication of one or more channels that will be available for use within respective cells along the geographic path that the device D is predicted to travel along. These cells may or may not be adjacent to one another. This effectively allows the device/system to plan ahead as it moves along the geographic path and between cells. By planning ahead, the device D can select appropriate channels as it moves into different cells/regions, thereby reducing the need for repeated channel availability requests, and improving seamless connectivity on unlicensed communication channels whilst moving, e.g. there will be shorter interruption of connectivity on unlicensed channels whilst moving between cells, or even none at all as the device D already knows which channels to use upon entry into a different cell.
  • the predicted path (which may be determined by the apparatus or elsewhere) may be determined more than once along the journey/route e.g. if it is determined that the previous prediction is not being followed or there is likely to be a deviation.
  • the apparatus allows for advance (e.g. while the device is still in one cell and before it has moved to the next (e.g. adjacent) cell in question along the predicted path) indications of channels available to the mobile device D whilst it is moving along a predicted geographic path.
  • advance e.g. while the device is still in one cell and before it has moved to the next (e.g. adjacent) cell in question along the predicted path
  • the embodiment in Figure 5 shows how this can be further optimised to improve seamless connectivity for a device moving between cells along a geographic path or journey.
  • device D is moving from origin A to destination B.
  • the device D is predicted to cross over five different cells along this geographic path.
  • the apparatus 100/processor 2 has identified/determined a full listing of channels available within each cell.
  • cell (i) has channels three and four available, whilst channels one, two, five and six are not available.
  • cell (ii) channels one, four and five are available, whilst channels two, three and six are not available, and so on.
  • the processor 2 is configured to consider available channels that are common to each of the respective cells along the predicted geographic path. As is illustrated in Figure 5, it can be determined based on the predicted geographic path that channel four is common to all cells/regions that the path extends across. The processor 2 then provides this indication to the mobile device via output 4 that channel four can be used across all cells (i)-(v). Although in this embodiment the cells are adjacent to one another, in other embodiments, this may not necessarily be the case.
  • channel selection for a device within a given cell in the prior art is somewhat arbitrary.
  • one or more of channel strength, reliability etc. may also be considered as a criterion for determining channel availability (e.g. if more than one channel is available).
  • a user may be carrying mobile device D on a route that may involve travelling along certain roads, streets, or taking trains, cars, buses, planes, etc.
  • there may be multiple other users who are also taking the same route e.g. commuters on a train, bus; friends in a car, etc.
  • the multiple users are sharing a journey.
  • the users may form a locally defined network, such as ad hoc network, or a mesh network. Users may join or leave the network at any time, however it is helpful that they are all sharing at least a portion of a journey together.
  • Figures 6 & 7 illustrate an advantageous embodiment which provides for improvements of users of mobile devices D & D' in a locally defined network, where the devices D & D' wish to use unlicensed communication channels as per the above embodiments.
  • the present FCC regulation for white-space devices requires channel availability queries to be made every time the device moves between cells, i.e. every 50m.
  • the whole network is moving together with its users (e.g. on a train, bus, plane, etc).
  • the devices may lose their connection to the network every 50m whilst their respective devices perform the required channel availability request.
  • Planning communication and channel switching/changing during movement would provide for greater efficiency if the devices D & D' could be provided with information on channel availability in different locations beforehand.
  • Figure 6 illustrates essentially the same scenario as in Figure 5, except that in Figure 6 a number of other devices D are on the same journey as the single device in the scenario of Figure 5.
  • the highlighted device D' is, in this locally defined ad hoc network, configured to act as a master node.
  • This master node device D' effectively represents the network to the apparatus 100 (and in other embodiments may comprise the apparatus 100).
  • the master node mobile device D' provides predicted geographic path signalling to the apparatus 100, which then operates in substantially the same way as for the single mobile device of Figure 5.
  • the processor 2 then returns the advance indication (via output 4) that channel 4 is available for use by master node mobile device D'. This advance indication may then be used by the other devices of the network to select appropriate channels available for use along the predicted geographic path to be taken.
  • Figure 7 illustrates how the designated master node mobile device D' may provide this advance indication information to the other devices of the network.
  • a single device D' can represent an entire locally defined network to an apparatus such as apparatus 100. This helps to reduce the number of channel availability queries that would otherwise have to be made by each device of the locally defined network. This also helps to provide for similar advantages as already discussed above.
  • Provision of an advance indication By determining and providing channel availability information for mobile devices based on their predicted geographic paths, instead of rigidly making channel availability requests every time a device moves into a new cell, it is possible to try to limit the number of queries being made by respective devices. It is also possible to have necessary channel availability in advance of the device moving to a new location (new (e.g. adjacent) cell). This advantage can be seen to applicable to many situations or fields where decisions and selections need to be made over the course of a journey based on a given predicted geographic path/location (as per Figure 4b).
  • Optimizing channel selection Once the advance channel information/indication is determined (or received), it is possible to select/plan in advance the channels that will be used in particular regions.
  • Master node mobile device representing a network
  • a single device of a network can represent a whole ad hoc/mesh network based on the principle that devices in a locally defined network can be assumed to share a journey across respective cells. Therefore, once channels are determined for one particular device of a network (e.g. a selected master node device), then the channel availability information for the other devices is also determined and may be shared out by the master node mobile device.
  • channel availability information for that route has been determined. Therefore, if this information was stored, then any device moving from A to B in the future could recall/use some or all of the same information/indication that was provided to the first device undertaking that journey.
  • This information sharing could be stored and recalled using a secondary database, or (for common/useful information) could be preloaded onto devices or downloadable onto devices (e.g. like a subscription or update). Further optimization could also include pre-emptively altering the shared database to help avoid the situation where many devices are all trying to simultaneously operate on the same channels based on the shared information in the secondary database, thereby helping to optimize and streamline such usage.
  • the method comprises:
  • 201 receiving predicted geographic path signalling associated with prediction of a geographic path to be taken by a mobile device, the path extending across two or more (e.g. adjacent) cells, each cell defining a particular set of radio channels available for use by the mobile device in that cell;
  • the method is adapted for a locally defined network comprising a particular plurality of mobile devices, where one is configured to act as a master node for the other mobile devices of the network (as per the embodiment shown in Figures 6 & 7).
  • This variation involves:
  • Figure 9 illustrates schematically a computer/processor readable media 500 providing a program according to an embodiment of the present invention.
  • the computer/processor readable media is a disc such as a digital versatile disc (DVD) or a compact disc (CD).
  • the computer readable media may be any media that has been programmed in such a way as to carry out an inventive function.
  • any mentioned apparatus/device/server and/or other features of particular mentioned apparatus/device/server may be provided by apparatus arranged such that they become configured to carry out the desired operations only when enabled, e.g. switched on, or the like. In such cases, they may not necessarily have the appropriate software loaded into the active memory in the non-enabled (e.g.
  • the apparatus may comprise hardware circuitry and/or firmware.
  • the apparatus may comprise software loaded onto memory. Such software/computer programs may be recorded on the same memory/processor/functional units and/or on one or more memories/processors/functional units.
  • a particular mentioned apparatus/device/server may be preprogrammed with the appropriate software to carry out desired operations, and wherein the appropriate software can be enabled for use by a user downloading a "key", for example, to unlock/enable the software and its associated functionality.
  • Advantages associated with such embodiments can include a reduced requirement to download data when further functionality is required for a device, and this can be useful in examples where a device is perceived to have sufficient capacity to store such pre-programmed software for functionality that may not be enabled by a user.
  • the any mentioned apparatus/circuitry/elements/processor may have other functions in addition to the mentioned functions, and that these functions may be performed by the same apparatus/circuitry/elements/processor.
  • One or more disclosed aspects may encompass the electronic distribution of associated computer programs and computer programs (which may be source/transport encoded) recorded on an appropriate carrier (e.g. memory, signal).
  • an appropriate carrier e.g. memory, signal.
  • any "processor” described herein can comprise a collection of one or more individual processors/processing elements that may or may not be located on the same circuit board, or the same region/position of a circuit board or even the same device. In some embodiments one or more of any mentioned processors may be distributed over a plurality of devices. The same or different processor/processing elements may perform one or more functions described herein.
  • the term “signalling” may refer to one or more signals transmitted as a series of transmitted and/or received signals.
  • the series of signals may comprise one, two, three, four or even more individual signal components or distinct signals to make up said signalling. Some or all of these individual signals may be transmitted/received simultaneously, in sequence, and/or such that they temporally overlap one another.
  • processor and memory e.g. including ROM, CD-ROM etc
  • these may comprise a computer processor, Application Specific Integrated Circuit (ASIC), field-programmable gate array (FPGA), and/or other hardware components that have been programmed in such a way to carry out the inventive function.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Cette invention se rapporte à un appareil permettant de fournir une indication préalable concernant des canaux disponibles destinés à être utilisés par un dispositif mobile qui se déplace le long d'un trajet géographique. Le trajet s'étend à travers deux cellules ou plus, chaque cellule définissant un ensemble particulier de canaux radio disponibles pour être utilisés par le dispositif mobile dans cette cellule. L'appareil est configuré pour recevoir une signalisation de trajet géographique prévue associée à la prévision du trajet géographique qui doit être emprunté par le dispositif mobile. L'appareil est également configuré pour déterminer des canaux radio disponibles pour être utilisés par le dispositif mobile le long de ce trajet. L'appareil est également configuré pour fournir, à l'avance, une indication des canaux radio disponibles destinés à être utilisés par le dispositif mobile le long du trajet géographique dans chaque cellule respective le long du trajet. Figure 2
PCT/FI2010/050873 2009-12-11 2010-11-02 Appareil et procédés permettant de fournir à des dispositifs mobiles des informations concernant des canaux de communication disponibles lors d'un déplacement le long d'un trajet géographique WO2011070224A1 (fr)

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EP10835542.1A EP2510719B1 (fr) 2009-12-11 2010-11-02 Appareil et procédés permettant de fournir à des dispositifs mobiles des informations concernant des canaux de communication disponibles lors d'un déplacement le long d'un trajet géographique

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KR102675137B1 (ko) * 2016-05-06 2024-06-13 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 자원 할당 방법, 장비 및 시스템

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US20110143761A1 (en) 2011-06-16
EP2510719A4 (fr) 2016-12-07
CN102763443A (zh) 2012-10-31
CN102763443B (zh) 2015-10-14
EP2510719A1 (fr) 2012-10-17
US10172114B2 (en) 2019-01-01
EP2510719B1 (fr) 2019-01-23

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