WO2021190736A1 - Estimation de perte de trajet de liaison latérale - Google Patents

Estimation de perte de trajet de liaison latérale Download PDF

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Publication number
WO2021190736A1
WO2021190736A1 PCT/EP2020/058230 EP2020058230W WO2021190736A1 WO 2021190736 A1 WO2021190736 A1 WO 2021190736A1 EP 2020058230 W EP2020058230 W EP 2020058230W WO 2021190736 A1 WO2021190736 A1 WO 2021190736A1
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Prior art keywords
value
pathloss
sidelink
distance
network node
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PCT/EP2020/058230
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English (en)
Inventor
Magnus Thurfjell
Stefan WÄNSTEDT
Sara SANDBERG
Peter ÖKVIST
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Telefonaktiebolaget Lm Ericsson (Publ)
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Priority to PCT/EP2020/058230 priority Critical patent/WO2021190736A1/fr
Publication of WO2021190736A1 publication Critical patent/WO2021190736A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • Embodiments presented herein relate to a method, a user equipment (UE), a computer program, and a computer program product for estimating sidelink pathloss value of a sidelink between the UE and a second UE.
  • UE user equipment
  • computer program computer program product for estimating sidelink pathloss value of a sidelink between the UE and a second UE.
  • communications networks there may be a challenge to obtain good performance and capacity for a given communications protocol, its parameters and the physical environment in which the communications network is deployed.
  • sidelink communication enables two or more nearby devices, such as two UEs, to communicate with each other without the need of a radio access network node, such as a base station.
  • Sidelink communication can be used for the out-of-network coverage scenario but also for scenarios where both devices are within network coverage. The functionality can thus also be used in conjunction with conventional cellular network connections.
  • TPC transmit power control
  • DCI5 downlink control information 5
  • the UE is ordered to comply with different ways of power control. For example, given that the TPC command is set to “0”, power control is basically removed, and the UE is ordered to operate on maximum transmit power. Maximum allowed power for the control channel of the sidelink and maximum allowed power for the data channel of the sidelink are either cell specific or preconfigured.
  • the UE is ordered to adjust its sidelink transmit power in relation to the pathloss of the access link between the UE and the radio access network node.
  • Such power control schemes are in details further described in 3GPP TS 36.213 V15.7.0; in section 14.1.1.5 considering “UE procedure for PSSCH power control” and in section 14.2.1.3 for “UE procedure for PSCCH power control”.
  • an estimation of the pathloss of the access link is performed by the UE by measuring the received signal strength, P RX , of reference signals transmitted from the radio access network node. Since the transmit power, P TX , of the reference signals is known, the pathloss, PL EST , of the access link might, in logarithmic values, be estimated as:
  • the pathloss value PL EST does not provide valid information regarding the sidelink, which might thus result in an erroneous transmit power level being selected by the UE to use for transmission on the sidelink. Further, this does not take into account the transmit antenna gain and receive antenna gain, which for the sidelink could be quite different compared to the base station antenna gain.
  • An object of embodiments herein is to provide efficient estimation of the sidelink pathloss.
  • a method for estimating sidelink pathloss value of a sidelink between a first UE and a second UE The method is performed by the first UE.
  • the method comprises obtaining an access link pathloss value of an access link between the first UE and a radio access network node serving the first UE.
  • the method comprises obtaining a first distance value of distance between the first UE and the radio access network node.
  • the method comprises obtaining a second distance value of distance between the first UE and the second UE.
  • the method comprises estimating the sidelink pathloss value as a function of the first distance value, the access link pathloss value, and the second distance value.
  • a UE for estimating sidelink pathloss value of a sidelink between the UE and a second UE.
  • the UE comprises processing circuitry and a storage medium.
  • the storage medium contains instructions executable by the processing circuitry such that the UE is operative to obtain an access link pathloss value of an access link between the UE and a radio access network node serving the UE.
  • the UE is also operative to obtain a first distance value of distance between the UE and the radio access network node.
  • the UE is also operative to obtain a second distance value of distance between the UE and the second UE.
  • the UE is also operative to estimate the sidelink pathloss value as a function of the first distance value, the access link pathloss value, and the second distance value.
  • a UE for estimating sidelink pathloss value of a sidelink between the UE and a second UE comprises a first obtain module configured to obtain an access link pathloss value of an access link between the UE and a radio access network node serving the UE.
  • the UE comprises a second obtain module configured to obtain a first distance value of distance between the UE and the radio access network node.
  • the UE comprises a third obtain module configured to obtain a second distance value of distance between the UE and the second UE.
  • the UE comprises an estimate module configured to estimate the sidelink pathloss value as a function of the first distance value, the access link pathloss value, and the second distance value.
  • a computer program for estimating sidelink pathloss value of a sidelink between a first user equipment, UE, and a second UE.
  • the computer program comprising computer code which, when run on a processing circuitry of the first UE, causes the first UE to obtain an access link pathloss value of an access link between the first UE and a radio access network node serving the first UE.
  • the code further causes the first UE to obtain a first distance value of distance between the first UE and the radio access network node and to obtain a second distance value of distance between the first UE and the second UE.
  • the code further causes the first UE to estimate the sidelink pathloss value as a function of the first distance value, the access link pathloss value, and the second distance value.
  • a computer program product comprising a computer program according to the fourth aspect and a computer readable storage medium on which the computer program is stored.
  • the computer readable storage medium may be a non-transitory computer readable storage medium.
  • embodiments disclosed in this document provide efficient estimation of the sidelink pathloss.
  • embodiments disclosed in this document provide efficient estimation of the pathloss for sidelink communication.
  • embodiments disclosed in this document enable accurate control of transmit power, modulation and coding scheme, etc. for transmission on the sidelink.
  • Fig. 1 is a schematic diagram illustrating a communication network according to embodiments
  • Fig. 2 is a schematic diagram illustrating a part of the communication network of Fig. 1 according to embodiments;
  • Fig. 3 is a flowchart of methods according to embodiments.
  • Fig. 4 is a schematic diagram showing functional units of a UE according to an embodiment
  • Fig. 5 is a schematic diagram showing functional modules of a UE according to an embodiment
  • Fig. 6 shows one example of a computer program product comprising computer readable storage medium according to an embodiment
  • Fig. 7 is a schematic diagram illustrating a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments.
  • Fig. 8 is a schematic diagram illustrating host computer communicating via a radio base station with a terminal device over a partially wireless connection in accordance with some embodiments.
  • Fig. 1 is a schematic diagram illustrating a communication network 100a where embodiments presented herein can be applied.
  • the communication network 100a could be a third generation (3G) telecommunications network, a fourth generation (4G) telecommunications network, a fifth generation (5G) telecommunications network, or any advancement thereof, and support any 3 GPP telecommunications standard, where applicable.
  • 3G third generation
  • 4G fourth generation
  • 5G fifth generation
  • the communication network 100a comprises a radio access network node 140 configured to provide network access to UEs 200a, 200b in a radio access network 110.
  • the radio access network 110 is operatively connected to a core network 120.
  • the core network 120 is in turn operatively connected to a service network 130, such as the Internet.
  • the UEs 200a, 200b are thereby enabled to access services of the service network 130 and to exchange data with the service network 130.
  • the operations of accessing services and exchanging data are performed via the radio access network node 140.
  • the radio access network node 140 comprises, is collocated with, is integrated with, or is in operational communications with, a Transmit and Receive Point (TRP).
  • TRP Transmit and Receive Point
  • the radio access network node 140 (via its TRP) and the UEs 200a, 200b are configured to communicate with each other over access links 150a, 150b. Further, the UEs 200a, 200b are configured to communicate with each other over a sidelink 160.
  • Fig. 1 is a schematic diagram illustrating a communication network 100a where embodiments presented herein can be applied.
  • the communication network 100a could be a third generation (3G) telecommunications network, a fourth generation (4G) telecommunications network, a fifth generation (5G) telecommunications network, or any advancement thereof, and support any 3 GPP telecommunications standard, where applicable.
  • the communication network 100a comprises a radio access network node 140 configured to provide network access to UEs 200a, 200b in a radio access network 110.
  • the radio access network 110 is operatively connected to a core network 120.
  • the core network 120 is in turn operatively connected to a service network 130, such as the Internet.
  • the UEs 200a, 200b are thereby enabled to access services of the service network 130 and to exchange data with the service network 130.
  • the operations of accessing services and exchanging data are performed via the radio access network node 140.
  • the radio access network node 140 comprises, is collocated with, is integrated with, or is in operational communications with, a Transmit and Receive Point (TRP).
  • TRP Transmit and Receive Point
  • the radio access network node 140 (via its TRP) and the UEs 200a, 200b are configured to communicate with each other over access links 150a, 150b.
  • UE 200b might be out of coverage of the radio access network node 140, as illustrated by access link 150b being drawn with a dashed line.
  • the UEs 200a, 200b are configured to communicate with each other over a sidelink 160.
  • radio access network nodes 140 are radio base stations, base transceiver stations, Node Bs (NBs), evolved Node Bs (eNBs), gNBs, access points, access nodes, and backhaul nodes.
  • NBs Node Bs
  • eNBs evolved Node Bs
  • gNBs access points, access nodes, and backhaul nodes.
  • UEs 200a, 200b are wireless devices, mobile stations, mobile phones, handsets, wireless local loop phones, smartphones, laptop computers, tablet computers, network equipped sensors, network equipped vehicles, and so-called Internet of Things devices.
  • the UEs 200a, 200b are part of, collocated with, or integrated with, a respective vehicle.
  • Fig. 2 is a schematic diagram illustrating a part 100b of the communication network 100a of Fig. 1.
  • UE 200a moves along the direction or arrow 170 from a first position at which UE 200a and the radio access network node 140 communicate with each other over access link 150a to a second position at which UE 200a and the radio access network node 140 communicate with each other over access link 150a’ (and where UE 200a at the second position is illustrated as UE 200a’).
  • UE 200a will be denoted a first UE and UE 200b will be denoted a second UE.
  • UE 200b might take the role of first UE and UE 200a might take the role of second UE.
  • UE 200b might take the role of first UE
  • UE 200a might take the role of second UE.
  • the embodiments disclosed herein therefore relate to mechanisms for estimating sidelink pathloss value of a sidelink between a first UE 200a and a second UE 200b.
  • a first UE 200a a method performed by the first UE 200a, a computer program product comprising code, for example in the form of a computer program, that when run on a first UE 200a, causes the UE 200a to perform the method.
  • Fig. 3 is a flowchart illustrating embodiments of methods for estimating sidelink pathloss value of a sidelink between a first UE 200a and a second UE 200b. The methods are performed by the first UE 200a. The methods are advantageously provided as computer programs 620.
  • the sidelink pathloss value may be a function of access link pathloss, distance between the first UE 200a and the radio access network node 140, and distance between the first UE 200a and the second UE 200b.
  • the first UE 200a may be configured to perform actions SI 02, SI 04, and SI 06 in order to obtain respective values of these variables (quantities).
  • the first UE 200a obtains an access link pathloss value of an access link 150a between the first UE 200a and a radio access network node 140 serving the first UE 200a.
  • the first UE 200a obtains a first distance value of distance between the first UE 200a and the radio access network node 140.
  • the first UE 200a obtains a second distance value of distance between the first
  • the first UE 200a can estimate the sidelink pathloss and is thus configured to perform action S108:
  • the first UE 200a estimates the sidelink pathloss value as a function of the first distance value, the access link pathloss value, and the second distance value.
  • Embodiments relating to further details of estimating sidelink pathloss value of a sidelink 160 between a first UE 200a and a second UE 200b as performed by the first UE 200a will now be disclosed.
  • the first UE 200a could be different ways for the first UE 200a to use the thus estimated sidelink pathloss value.
  • the sidelink pathloss value is used when controlling one or more parameters. Different embodiments relating thereto will now be described in turn.
  • the sidelink pathloss value is utilized for controlling the sidelink transmit power.
  • the first UE 200a may be configured to perform (optional) action SI 10:
  • the first UE 200a controls level of transmit power for communicating on the sidelink 160 as a function of the sidelink pathloss value.
  • P PS SCH for data signalling (such as PSSCH signalling, where PSSCH is short for physical sidelink shared channel) on the sidelink 160
  • P PS CCH for control signalling (such as PSCCH signalling, where PSCCH is short for physical sidelink control channel) on the sidelink 160
  • the sidelink pathloss value is utilized for controlling the sidelink modulation and coding scheme (MCS).
  • MCS sidelink modulation and coding scheme
  • the first UE 200a is configured to perform (optional) action SI 12:
  • the first UE 200a controls modulation and coding scheme for communicating on the sidelink 160 as a function of the sidelink pathloss value.
  • MCS depends on the signal -to-interference-and-noise ratio (SINR).
  • SINR signal -to-interference-and-noise ratio
  • the sidelink pathloss value is utilized for controlling both the sidelink transmit power and the sidelink MCS.
  • the first UE 200a may obtain the first distance value, i.e., the value of the distance between the first UE 200a and the radio access network node 140, as in action S104.
  • the first distance value may be obtained from a timing advance (TA) value used for communication with the radio access network node 140. That is, according to an embodiment, the first UE 200a uses a TA value when communicating over the access link 150a with the radio access network node 140, and the first distance value is based on the TA value.
  • the TA value can be expressed in path distance with a certain granularity, which e.g. according to Long Term Evolution (LTE) typically is 78 meters.
  • LTE Long Term Evolution
  • an estimate of the average access link pathloss per distance can be calculated.
  • This value of average pathloss per distance is considered representative for the radio propagation environment in the radio access network 110. Assuming a similar radio propagation environment between the UEs 200a, 200b as between the first UE 200a and the radio access network node 140, a corresponding sidelink pathloss value can be calculated.
  • the first distance value may be obtained from cellular positioning techniques.
  • the first distance value is based on any of: time-difference of arrival measurements, round-trip-time measurements, angle-of-arrival measurements related to communication signals over the access link 150a with the radio access network node 140. It might therefore be assumed that the position of the radio access network node 140 is known in advance so that the position of the first UE 200a can be estimated. Given the position of both the radio access network node 140 and the first UE 200a, the distance between them can be calculated.
  • the first distance value may be obtained from a combination of the TA value and any of the disclosed cellular positioning techniques.
  • the first UE 200a can obtain the second distance value, i.e., the value of the distance between the first UE 200a and the second UE 200b, as in action SI 06.
  • the second distance value may be obtained from sensors at the first UE 200a.
  • sensors are light detection and ranging (LIDAR) sensors and radio detection and ranging (RADAR) sensors. These types of sensors are as such known in the art and further description thereof is therefore omitted.
  • the second distance value may be based on at least one of: LIDAR measurements, RADAR measurements.
  • the distance between the first UE 200a and the second UE 200b is representative of the distance to be covered by the transmission over the sidelink 160. If it can be assumed that there is a fixed landmark, or physical object (such as a building, road intersection, traffic light, etc.), in the vicinity of the second UE 200b and that the distance between the first UE 200a and the landmark is known (e.g. by using a positioning system, such as a Global Navigation Satellite System (GNSS) or a Global Positioning System (GPS) in combination with map information (from which the location of the landmark, or physical object, can be extracted), then the distance to the landmark, or physical object, can be used as an estimate of the distance between the first UE 200a and the second UE 200b.
  • GNSS Global Navigation Satellite System
  • GPS Global Positioning System
  • the second distance value may be based on round-trip-time measurements related to communication over the sidelink 160 with the second UE 200b. Given the round-trip-time for signaling between the first UE 200a and the second UE 200b, the distance between them can be calculated.
  • the second distance value can be obtained from cellular positioning techniques.
  • the position of the second UE 200b may be based on any of: time-difference of arrival measurements, round-trip-time measurements, angle-of-arrival measurements related to communication signals over the access link 150b with the radio access network node 140. It might therefore be assumed that the position of the radio access network node 140 is known in advance so that the position of the second UE 200b can be estimated. Given the position of both the second UE 200b and the first UE 200a, for which the position can be estimated in other ways, the distance between them can be calculated.
  • the second distance value may be obtained from a combination of the sensor measurements and any of the disclosed cellular positioning techniques.
  • the sidelink pathloss value may be dependent on a pathloss exponent value of the access link 150a.
  • the sidelink pathloss value is therefore estimated according to: where PL EST is the access link pathloss value, PL SL is the sidelink pathloss value, g is the pathloss exponent value of the access link 150a, d TA is the first distance value, and d SL is the second distance value.
  • the PL EST estimate reflects antenna gains of both the first UE 200a and the radio access network node 140.
  • an extra pathloss term PL C0RR could be added. This value represents e.g. a fixed value of how much larger the antenna gain of a radio access network node typically is compared to the antenna gain of a UE.
  • the sidelink pathloss value cane be estimated according to: As noted above, in some examples the sidelink pathloss value may be dependent on a pathloss exponent value. Further details relating thereto will now be disclosed.
  • the pathloss exponent value has a fixed value.
  • the fixed value might represent the pathloss exponent of a typical radio environment. This might yield a pathloss exponent value that, without the need for the first UE 200a to perform any calculations, sufficiently represents the true radio environment in many practical cases.
  • the pathloss exponent value may be determined from pathloss estimates to the radio access network node 140 at two distances.
  • the pathloss exponent value might be determined from two access link pathloss values, each of which is of a respective access link 150a, 150a’ (as in Fig. 2) between the first UE 200a and the radio access network node 140, and each of which is for a respective position of the first UE 200a relative the radio access network node 140.
  • These two access link pathloss values might be estimated from measurements on reference signals transmitted on each respective access link 150a, 150a’ from the radio access network node 140.
  • the measurements on the reference signals are represented by reference signal received power (RSRP) values.
  • RSRP reference signal received power
  • the pathloss exponent value is then determined according to:
  • g is the pathloss exponent value
  • PL EST1 and PL EST2 are the two access link pathloss values
  • d TA1 and d TA2 are two respective first distance values for a respective position of the first UE 200a relative the radio access network node 140 (such as the position of UE 200a and the position of UE 200a’ in Fig. 2).
  • This might yield a pathloss exponent value that better represents the true radio environment than a fixed value, albeit at a higher computational cost than using a fixed value.
  • Fig. 4 schematically illustrates, in terms of a number of functional units, the components of a UE 200a according to an embodiment.
  • Processing circuitry 210 is provided using any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), etc., capable of executing software instructions stored in a computer program product 610 (as in Fig. 6), e.g. in the form of a storage medium 230.
  • the processing circuitry 210 may further be provided as at least one application specific integrated circuit (ASIC), or field programmable gate array (FPGA).
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the processing circuitry 210 is configured to cause the UE 200a to perform a set of operations, or actions, as disclosed above.
  • the storage medium 230 may store the set of operations
  • the processing circuitry 210 may be configured to retrieve the set of operations from the storage medium 230 to cause the UE 200a to perform the set of operations.
  • the set of operations may be provided as a set of executable instructions.
  • the processing circuitry 210 is thereby arranged to execute methods as herein disclosed.
  • the storage medium 230 may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.
  • the UE 200a may further comprise a communications interface 220 at least configured for communications with the radio access network node 140 over an access link 150a, 150a’ and another UE 200b over a sidelink 160.
  • the communications interface 220 may comprise one or more transmitters and receivers, comprising analogue and digital components.
  • the processing circuitry 210 controls the general operation of the UE 200a e.g.
  • Fig. 5 schematically illustrates, in terms of a number of functional modules, the components of a UE 200a according to an embodiment.
  • the UE 200a of Fig. 5 comprises a number of functional modules; a first obtain module 210a configured to perform action S102, a second obtain module 210b configured to perform action S104, a third obtain module 210c configured to perform action SI 06, and an estimate module 210d configured to perform action S108.
  • the UE 200a of Fig. 5 may further comprise a number of optional functional modules, such as any of a first control module 210e configured to perform action SI 10, and a second control module 21 Of configured to perform action SI 12.
  • each functional module 210a-210f may in one embodiment be implemented only in hardware and in another embodiment with the help of software, i.e., the latter embodiment having computer program instructions stored on the storage medium 230 which when run on the processing circuitry makes the UE 200a perform the corresponding actions mentioned above in conjunction with Fig 5.
  • the modules correspond to parts of a computer program, they do not need to be separate modules therein, but the way in which they are implemented in software is dependent on the programming language used.
  • the various functional modules may be integrated into a smaller number of modules compared with an embodiment in which we have separate discrete module for each of the function/operation disclosed.
  • one or more or all functional modules 210a-210f may be implemented by the processing circuitry 210, possibly in cooperation with the communications interface 220 and/or the storage medium 230.
  • the processing circuitry 210 may thus be configured to fetch instructions from the storage medium 230 as provided by a functional module 210a-210f and to execute these instructions, thereby performing any actions as disclosed herein.
  • the UE 200a may be provided as a standalone device or as a part of at least one further device. Examples of different types of UEs have been provided above. For example, as also disclosed above, the UE 200a might be part of, collocated with, or integrated with, a vehicle. A first portion of the instructions performed by the UE 200a may be executed in a first device, and a second portion of the of the instructions performed by the UE 200a may be executed in a second device; the herein disclosed embodiments are not limited to any particular number of devices on which the instructions performed by the UE 200a may be executed. Hence, the methods according to the herein disclosed embodiments are suitable to be performed by a UE 200a residing in a cloud computational environment.
  • processing circuitry 210 may be distributed among a plurality of devices, or nodes. The same applies to the functional modules 210a-210f of Fig. 5 and the computer program 620 of Fig. 6.
  • Fig. 6 shows one example of a computer program product 610 comprising computer readable storage medium 630.
  • a computer program 620 can be stored, which computer program 620 can cause the processing circuitry 210 and thereto operatively coupled entities and devices, such as the communications interface 220 and the storage medium 230, to execute methods according to embodiments described herein.
  • the computer program 620 and/or computer program product 610 may thus provide means for performing any actions as herein disclosed.
  • the computer program product 610 is illustrated as an optical disc, such as a CD (compact disc) or a DVD (digital versatile disc) or a Blu-Ray disc.
  • the computer program product 610 could also be embodied as a memory, such as a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or an electrically erasable programmable read-only memory (EEPROM) and more particularly as a non-volatile storage medium of a device in an external memory such as a USB (Universal Serial Bus) memory or a Flash memory, such as a compact Flash memory.
  • the computer program 620 is here schematically shown as a track on the depicted optical disk, the computer program 620 can be stored in any way which is suitable for the computer program product 610.
  • Fig. 7 is a schematic diagram illustrating a telecommunication network connected via an intermediate network 420 to a host computer 430 in accordance with some embodiments.
  • a communication system includes telecommunication network 410, such as a 3GPP-type cellular network, which comprises access network 411, such as radio access network 110 in Fig. 1, and core network 414, such as core network 120 in Fig. 1.
  • Access network 411 comprises a plurality of radio access network nodes 412a, 412b, 412c, such as NBs, eNBs, gNBs (each corresponding to the radio access network node 140 of Fig.
  • Each radio access network nodes 412a, 412b, 412c is connectable to core network 414 over a wired or wireless connection 415.
  • a first UE 491 located in coverage area 413c is configured to wirelessly connect to, or be paged by, the corresponding network node 412c.
  • a second UE 492 in coverage area 413a is wirelessly connectable to the corresponding network node 412a.
  • UE 491, 492 While a plurality of UE 491, 492 are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole UE is in the coverage area or where a sole terminal device is connecting to the corresponding network node 412.
  • the UEs 491, 492 correspond to the UEs 200a, 200b of Fig. 1.
  • Telecommunication network 410 is itself connected to host computer 430, which may be embodied in the hardware and/or software of a standalone server, a cloud- implemented server, a distributed server or as processing resources in a server farm.
  • Host computer 430 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider. Connections 421 and 422 between telecommunication network 410 and host computer 430 may extend directly from core network 414 to host computer 430 or may go via an optional intermediate network 420.
  • Intermediate network 420 may be one of, or a combination of more than one of, a public, private or hosted network; intermediate network 420, if any, may be a backbone network or the Internet; in particular, intermediate network 420 may comprise two or more sub-networks (not shown).
  • the communication system of Fig. 7 as a whole enables connectivity between the connected UEs 491, 492 and host computer 430.
  • the connectivity may be described as an over-the-top (OTT) connection 450.
  • Host computer 430 and the connected UEs 491, 492 are configured to communicate data and/or signalling via OTT connection 450, using access network 411, core network 414, any intermediate network 420 and possible further infrastructure (not shown) as intermediaries.
  • OTT connection 450 may be transparent in the sense that the participating communication devices through which OTT connection 450 passes are unaware of routing of uplink and downlink communications.
  • network node 412 may not or need not be informed about the past routing of an incoming downlink communication with data originating from host computer 430 to be forwarded (e.g., handed over) to a connected UE 491. Similarly, network node 412 need not be aware of the future routing of an outgoing uplink communication originating from the UE 491 towards the host computer 430.
  • an OTT a service related to motorway traffic control may use sidelink communication between vehicles on a motorway.
  • Other OTT services using OTT communication can also be envisaged.
  • Fig. 8 is a schematic diagram illustrating host computer communicating via a radio access network node with a UE over a partially wireless connection in accordance with some embodiments.
  • Example implementations, in accordance with an embodiment, of the UE, radio access network node and host computer discussed in the preceding paragraphs will now be described with reference to Fig. 8.
  • host computer 510 comprises hardware 515 including communication interface 516 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of communication system 500.
  • Host computer 510 further comprises processing circuitry 518, which may have storage and/or processing capabilities.
  • processing circuitry 518 may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions.
  • Host computer 510 further comprises software 511, which is stored in or accessible by host computer 510 and executable by processing circuitry 518.
  • Software 511 includes host application 512.
  • Host application 512 may be operable to provide a service to a remote user, such as UE 530 connecting via OTT connection 550 terminating at UE 530 and host computer 510.
  • the UE 530 corresponds to the UEs 200a, 200b of Fig. 1.
  • host application 512 may provide user data which is transmitted using OTT connection 550.
  • Communication system 500 further includes radio access network node 520 provided in a telecommunication system and comprising hardware 525 enabling it to communicate with host computer 510 and with UE 530.
  • the radio access network node 520 corresponds to the radio access network node 140 of Fig. 1.
  • Hardware 525 may include communication interface 526 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of communication system 500, as well as radio interface 527 for setting up and maintaining at least wireless connection 570 with UE 530 located in a coverage area (not shown in Fig. 8) served by radio access network node 520.
  • Communication interface 526 may be configured to facilitate connection 560 to host computer 510. Connection 560 may be direct or it may pass through a core network (not shown in Fig.
  • radio access network node 520 further includes processing circuitry 528, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions.
  • Radio access network node 520 further has software 521 stored internally or accessible via an external connection.
  • Communication system 500 further includes UE 530 already referred to. Its hardware 535 may include radio interface 537 configured to set up and maintain wireless connection 570 with a radio access network node serving a coverage area in which UE 530 is currently located.
  • Hardware 535 of UE 530 further includes processing circuitry 538, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions.
  • UE 530 further comprises software 531, which is stored in or accessible by UE 530 and executable by processing circuitry 538.
  • Software 531 includes client application 532.
  • Client application 532 may be operable to provide a service to a human or non-human user via UE 530, with the support of host computer 510.
  • an executing host application 512 may communicate with the executing client application 532 via OTT connection 550 terminating at UE 530 and host computer 510.
  • client application 532 may receive request data from host application 512 and provide user data in response to the request data.
  • OTT connection 550 may transfer both the request data and the user data.
  • Client application 532 may interact with the user to generate the user data that it provides.
  • host computer 510, radio access network node 520 and UE 530 illustrated in Fig. 8 may be similar or identical to host computer 430, one of network nodes 412a, 412b, 412c and one of UEs 491, 492 of Fig. 7, respectively.
  • the inner workings of these entities may be as shown in Fig. 8 and independently, the surrounding network topology may be that of Fig. 7.
  • OTT connection 550 has been drawn abstractly to illustrate the communication between host computer 510 and UE 530 via network node 520, without explicit reference to any intermediary devices and the precise routing of messages via these devices.
  • Network infrastructure may determine the routing, which it may be configured to hide from UE 530 or from the service provider operating host computer 510, or both. While OTT connection 550 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network).
  • Wireless connection 570 between UE 530 and radio access network node 520 is in accordance with the teachings of the embodiments described throughout this disclosure.
  • One or more of the various embodiments improve the performance of OTT services provided to UE 530 using OTT connection 550, in which wireless connection 570 forms the last segment. More precisely, the teachings of these embodiments may reduce interference, due to improved classification ability of airborne UEs which can generate significant interference.
  • a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • the measurement procedure and/or the network functionality for reconfiguring OTT connection 550 may be implemented in software 511 and hardware 515 of host computer 510 or in software 531 and hardware 535 of UE 530, or both.
  • sensors (not shown) may be deployed in or in association with communication devices through which OTT connection 550 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 511, 531 may compute or estimate the monitored quantities.
  • the reconfiguring of OTT connection 550 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect network node 520, and it may be unknown or imperceptible to radio access network node 520. Such procedures and functionalities may be known and practiced in the art.
  • measurements may involve proprietary UE signalling facilitating host computer’s 510 measurements of throughput, propagation times, latency and the like.
  • the measurements may be implemented in that software 511 and 531 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using OTT connection 550 while it monitors propagation times, errors etc.

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

Abstract

L'invention concerne des mécanismes pour estimer une valeur de perte de trajet de liaison latérale d'une liaison latérale entre un premier UE et un second UE. Le procédé est exécuté par le premier UE. Le procédé comprend l'obtention d'une valeur de perte de trajet de liaison d'accès d'une liaison d'accès entre le premier UE et un nœud de réseau d'accès radio desservant le premier UE. Le procédé comprend l'obtention d'une première valeur de distance d'une distance entre le premier UE et le nœud de réseau d'accès radio. Le procédé comprend l'obtention d'une seconde valeur de distance d'une distance entre le premier UE et le second UE. Le procédé comprend l'estimation de la valeur de perte de trajet de liaison latérale en fonction de la première valeur de distance, de la valeur de perte de trajet de liaison d'accès et de la seconde valeur de distance.
PCT/EP2020/058230 2020-03-24 2020-03-24 Estimation de perte de trajet de liaison latérale WO2021190736A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017171895A1 (fr) * 2016-04-01 2017-10-05 Intel Corporation Adaptation de liaison pour communication de dispositif à dispositif (d2d) de faible complexité
US20170367067A1 (en) * 2016-06-15 2017-12-21 Samsung Electronics Co., Ltd Apparatus and method for positioning terminal in wireless communication system
WO2018191976A1 (fr) * 2017-04-21 2018-10-25 SZ DJI Technology Co., Ltd. Commande de puissance d'émission pour systèmes de communication sans fil
WO2019010618A1 (fr) * 2017-07-10 2019-01-17 Panasonic Intellectual Property Corporation Of America Procédé de controle de puissance et dispositif de communication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017171895A1 (fr) * 2016-04-01 2017-10-05 Intel Corporation Adaptation de liaison pour communication de dispositif à dispositif (d2d) de faible complexité
US20170367067A1 (en) * 2016-06-15 2017-12-21 Samsung Electronics Co., Ltd Apparatus and method for positioning terminal in wireless communication system
WO2018191976A1 (fr) * 2017-04-21 2018-10-25 SZ DJI Technology Co., Ltd. Commande de puissance d'émission pour systèmes de communication sans fil
WO2019010618A1 (fr) * 2017-07-10 2019-01-17 Panasonic Intellectual Property Corporation Of America Procédé de controle de puissance et dispositif de communication

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