CN112956136B - Beam pattern switching for positioning reference signal measurements - Google Patents
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- CN112956136B CN112956136B CN201880099261.XA CN201880099261A CN112956136B CN 112956136 B CN112956136 B CN 112956136B CN 201880099261 A CN201880099261 A CN 201880099261A CN 112956136 B CN112956136 B CN 112956136B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
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Abstract
Embodiments of the present disclosure relate to apparatus, methods, devices, and computer-readable storage media for beam pattern exchange for Positioning Reference Signal (PRS) measurements. In an example embodiment, a User Equipment (UE) receives an indication of a beam pattern for transmitting PRSs in a reference cell. PRSs are then detected by the UE based on the beam pattern.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of communications and, in particular, relate to an apparatus, method, device, and computer-readable storage medium for beam pattern exchange for Positioning Reference Signal (PRS) measurements.
Background
Positioning techniques for New Radio (NR) systems are being studied to support NR-based Radio Access Technology (RAT) -related positioning in NR operating bands including both low frequency bands (< 6GHz or FR 1) and high frequency bands (> 6GHz or FR 2). Observed time difference of arrival (OTDOA) techniques are Downlink (DL) positioning techniques in Long Term Evolution (LTE) systems. OTDOA technology is a multi-point positioning technology in which a User Equipment (UE) measures time of arrival (TOA) of signals received from a plurality of base stations (e.g., enodebs or enbs), and the UE can position the UE based on the TOA.
To improve the positioning performance of OTDOA techniques, positioning Reference Signals (PRS) have been introduced. For example, the UE measures TOA of PRS from the base station to improve positioning performance of OTDOA techniques. OTDOA technology is a mature positioning technology and has been well defined in LTE standardization. But this technique is not applicable to NR positioning. Furthermore, multi-beam transmission has been negotiated to provide better coverage in NR systems, especially for high frequency bands.
Disclosure of Invention
In general, example embodiments of the present disclosure provide apparatus, methods, devices, and computer-readable storage media for beam pattern switching for PRS measurements.
In a first aspect, an apparatus is provided that includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to receive, at the user equipment, an indication of a beam pattern for transmitting positioning reference signals in a reference cell. The apparatus is further caused to detect positioning reference signals based on the beam pattern.
In a second aspect, an apparatus is provided that includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to collect a set of beam patterns at a location server, the set of beam patterns for transmitting a set of positioning reference signals in a set of cells. The apparatus is also caused to select a reference cell from a set of cells for the user equipment. The apparatus is also caused to transmit, via the base station, an indication of a beam pattern among the set of beam patterns to the user equipment, the beam pattern being used for transmitting positioning reference signals among the set of positioning reference signals in the reference cell.
In a third aspect, a method is provided. In the method, a user equipment receives an indication of a beam pattern for transmitting positioning reference signals in a reference cell. The positioning reference signal is detected based on the beam pattern.
In a fourth aspect, a method is provided. In the method, a location server collects a set of beam patterns for transmitting a set of positioning reference signals in a set of cells. The location server selects a reference cell from a set of cells for the user equipment. Furthermore, the location server sends an indication of a beam pattern among the set of beam patterns for transmitting positioning reference signals among the set of positioning reference signals in the reference cell to the user equipment via the base station.
In a fifth aspect, there is provided an apparatus comprising means for performing the method according to the third or fourth aspect.
In a sixth aspect, a computer readable storage medium having a computer program stored thereon is provided. The computer program, when executed by a processor of a device, causes the device to perform the method according to the third or fourth aspect.
It should be understood that the summary is not intended to identify key or essential features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
Some example embodiments will now be described with reference to the accompanying drawings, in which:
FIG. 1 illustrates an example PRS transmission pattern in an LTE system;
FIG. 2 illustrates an example beam scanning pattern in an NR system;
FIG. 3 illustrates an example environment in which embodiments of the present disclosure may be implemented;
FIG. 4 illustrates a flowchart of an example method according to some embodiments of the present disclosure;
FIG. 5 illustrates an example PRS transmission pattern, according to some example embodiments of the present disclosure;
FIG. 6 illustrates an example PRS transmission pattern, according to some other example embodiments of the present disclosure;
fig. 7 (a) shows a conventional TOA estimation procedure without beam combining in the case of using the beam pattern shown in fig. 6;
fig. 7 (b) shows another conventional TOA estimation procedure without beam combining in the case of using the beam pattern as shown in fig. 6;
Fig. 7 (c) illustrates an example TOA estimation procedure with intra-beam combining according to some example embodiments of the present disclosure;
FIG. 8 illustrates a flowchart of an example method according to some other embodiments of the present disclosure;
Fig. 9 illustrates an example process of beam pattern exchange according to some embodiments of the present disclosure;
Fig. 10 shows a simplified block diagram of a device suitable for implementing embodiments of the present disclosure.
The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.
Detailed Description
Principles of the present disclosure will now be described with reference to some example embodiments. It should be understood that these embodiments are described for illustrative purposes only and to assist those skilled in the art in understanding and practicing the present disclosure without placing any limitation on the scope of the disclosure. The disclosure described herein may be implemented in various other ways besides those described below.
In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
As used herein, the term "base station" (BS) refers to a device via which a terminal device or UE may access a communication network. Examples of BSs include repeaters, access Points (APs), transmission points (TRPs), node BS (nodebs or NB), evolved nodebs (eNodeB or eNB), gigabit nodebs (gNB), remote radio modules (RRUs), radio Heads (RH), remote Radio Heads (RRHs), low power nodes (such as femto, pico), and so on.
As used herein, the term "terminal device" or "user equipment" (UE) refers to any terminal device capable of wireless communication with each other or with a base station. Communication may involve the transmission and/or reception of wireless signals using electromagnetic signals, radio waves, infrared signals, and/or other types of signals suitable for conveying information over the air. In some embodiments, the UE may be configured to send and/or receive information without direct human interaction. For example, the UE may send information to the network device on a predetermined schedule when triggered by an internal or external event, or in response to a request from the network side.
Examples of UEs include, but are not limited to, user Equipment (UE), such as a smart phone, a wireless enabled tablet computer, a laptop computer embedded device (LEE), a laptop computer installed device (LME), and/or a wireless Customer Premises Equipment (CPE). For purposes of discussion, some embodiments will be described with reference to a UE as an example of a terminal device, and the terms "terminal device" and "user equipment" (UE) may be used interchangeably in the context of the present disclosure.
As used herein, the term "location server" refers to a device capable of communicating with a base station and providing location services to UEs. As an example, the location server may be a device in a core network of a communication network, such as an evolved serving mobile location center (E-SMLC).
As used herein, the term "reference cell" refers to any cell that may be used as a reference for locating a UE. As an example, the reference cell may be a serving cell provided by a base station serving the UE, or any other cell provided by a serving base station or any other base station.
As used herein, the term "circuitry" may refer to one or more or all of the following:
(a) Pure hardware circuit implementations (such as implementations in analog and/or digital circuitry only); and
(B) A combination of hardware circuitry and software, such as (as applicable): (i) A combination of analog and/or digital hardware circuitry and software/firmware, and (ii) a hardware processor (including a digital signal processor) with software, any portion of software and memory that work in concert to cause a device, such as a mobile phone or server, to perform various functions; and
(C) Software (e.g., firmware) is required to operate but may not exist as hardware circuitry and/or a processor, such as a microprocessor or portion of a microprocessor, when software operation is not required.
This definition of circuitry applies to all uses of this term in this application, including in any claims. As another example, as used in this disclosure, the term circuitry also encompasses an implementation of pure hardware circuit or processor (or processors) or hardware circuit or processor and portions of its (or their) accompanying software and/or firmware. The term circuitry also encompasses (e.g., and if applicable to the particular claim element) a baseband integrated circuit or processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or network device.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term "comprising," "including," and variations thereof are to be understood as open-ended terms to mean "including, but not limited to," the term "based on," is to be understood as "based at least in part on," the terms "one embodiment" and "an embodiment" are to be understood as "at least one embodiment," the term "another embodiment" is to be understood as "at least one other embodiment," and additional definitions (whether explicit or implicit) may be included below.
In OTDOA positioning of LTE systems, a UE typically measures time differences in PRS signals from two or more base stations for positioning. PRSs may be periodically transmitted by a base station in groups of consecutive DL subframes using omni-directional antennas.
Fig. 1 illustrates an example PRS transmission pattern 100 in an LTE system. As shown, PRS 105 is transmitted in several subframes 110 in PRS period 115. PRS 105 has PRS subframe offset 125 with respect to reference time 120 when subframe number (SFN) =0 and slot number=0. To assist the UE in acquiring or detecting PRS 105, assistance data, such as PRS subframe offset 125, PRS period 115, and number of consecutive PRS subframes 110, may be provided to the UE from a base station.
In NR systems, multi-beam transmission or beam scanning is supported in the high frequency band (> 6 GHz) to provide better coverage. Fig. 2 shows an example beam scanning pattern 200 in an NR system. As shown, in beam sweep pattern 200 TRP 205 transmits signals by sweeping (210) from beam 215-1 to beam 215-N, where N represents any suitable positive integer greater than 1. For discussion purposes, beams will be referred to collectively or individually as beams 215. Multiple UEs 220-1, 220-2, … …, 220-M (where M represents any suitable positive integer) may receive signals transmitted using the respective beams.
For NR positioning, PRSs can be transmitted with such multi-beam scanning. If the UE does not know the beam scanning design of the PRS, the UE will not be able to perform Reference Signal Time Difference (RSTD) measurements.
Embodiments of the present disclosure provide a beam pattern switching scheme to improve multi-beam PRS measurements and TOA estimates at, for example, UEs. With this scheme, the UE receives an indication of a beam pattern for transmitting PRSs in the reference cell. The beam pattern may include the number of beams, a beam index of the beam, a beam duration of the beam, a subframe offset of the beam, a transmission occasion of one beam, a beam scanning period, and the like. Based on the beam pattern, the UE may detect PRS more efficiently and accurately.
In this way, PRS configurations related to beam patterns can be communicated to UEs to support multi-beam PRS measurements in NR, particularly for high frequency bands (> 6 GHz). Based on the received beam pattern, the UE may determine how to detect and measure PRSs and may perform RSTD measurements more effectively and efficiently. For example, the UE may combine PRSs transmitted with one beam to improve accuracy of TOA estimation and thereby improve positioning accuracy.
FIG. 3 illustrates an example environment 300 in which embodiments of the present disclosure may be implemented. Environment 300, which is part of a communication network, includes a base station 310 and a UE 320. As shown, the base station 310 provides a cell 330 in which the UE 320 may be served. Environment 300 also includes a location server 340, where location server 340 may communicate with base station 310 and with UE 320 via base station 310 to provide location services to UE 320.
It should be understood that one base station, one UE, and one location server are shown in fig. 1 for illustrative purposes only and are not intended to suggest any limitation as to the scope of the disclosure. Environment 300 may include any suitable number of base stations, UEs, and location servers suitable for implementing embodiments of the present disclosure. It should also be understood that one cell is provided by the base station 310 for illustration purposes only. Depending on the particular implementation, the base station 310 may provide more cells.
UE 320 may communicate with base station 310 or may communicate with additional terminal devices or location servers 340 or other network entities via base station 310. Communication between UE 320 and base station 310 may follow any suitable wireless communication standard or protocol, such as Universal Mobile Telecommunications System (UMTS), long Term Evolution (LTE), LTE-advanced (LTE-a), fifth generation (5G) NR, wireless fidelity (Wi-Fi), and Worldwide Interoperability for Microwave Access (WiMAX) standards, and employ any suitable communication technology including, for example, multiple Input Multiple Output (MIMO), orthogonal Frequency Division Multiplexing (OFDM), time Division Multiplexing (TDM), frequency Division Multiplexing (FDM), code Division Multiplexing (CDM), bluetooth (Bluetooth), zigBee, and Machine Type Communication (MTC), enhanced mobile broadband (eMBB), large-scale machine type communication (mMTC), and ultra-reliable low delay communication (uRLLC) technologies.
Location server 340 may communicate with base station 310 and other base stations. The communication between the location server 340 and the base station 310 may utilize any suitable communication technology. In some embodiments, location server 340 and base station 310 may communicate using a cable.
In this example, base station 310 may transmit PRSs to UE 320 on three beams 215-1, 215-2, and 215-3 in cell 330. The location server 340 may communicate with the base station 310 and other surrounding base stations to collect beam patterns of PRSs transmitted in respective cells provided by the base stations.
In various example embodiments of the present disclosure, the UE 320 receives an indication of a beam pattern for transmitting PRSs in a reference cell and detects PRSs based on the beam pattern. The indication may be received by UE 320 from location server 340 via base station 310. The reference cell may be a serving cell of the UE 320 (e.g., cell 340), or may be any other cell provided by another base station and used as a reference for locating the UE 320.
Fig. 4 illustrates a flowchart of an example method 400 according to some embodiments of the present disclosure. The method 400 may be implemented at the UE 320 as shown in fig. 3. For discussion purposes, the method 400 will be described with reference to FIG. 3.
At block 405, the UE 320 receives an indication of a beam pattern for transmitting PRSs in a reference cell. UE 320 may receive the indication from location server 340 via base station 310. For example, the base station 310 and other base stations can transmit beam patterns for transmitting PRSs in respective cells to the location server 340. Thus, the location server 340 can know the beam scanning patterns of these base stations. The location server 340 may then inform the UE 320 of the beam pattern in the reference cell via the base station 310. The detailed process and operation at the location server 340 will be discussed later with reference to fig. 8.
The beam pattern may convey any suitable information regarding one or more beams used to transmit PRSs. For example, in the beam scanning pattern 200 shown in fig. 2, PRSs may be transmitted on all beams using multiple transmission opportunities to cover the entire cell coverage. On one beam, PRSs may be transmitted for the duration of the beam. The beam duration may include some continuous or discontinuous time resources such as OFDM symbols, subframes, and slots. The beam durations of the different beams may be different. The beam duration indicates a transmission occasion associated with the corresponding beam. In this case, for example, transmission opportunities of different beams may be distinguished so that the UE 320 may combine PRSs transmitted using the same beam.
As an example, the beam pattern may include a number of beams, a beam index of the beam, a beam duration of the beam, a subframe offset of the beam, a transmission opportunity of the beam, a beam scanning period, and the like. In some example embodiments of the present disclosure, the beam index may indicate which beam is used for PRS transmission in the beam duration. The beam pattern for PRS transmissions may be repeated in one period and the period may be configured by the base station.
The beam pattern may be indicated in any suitable way. In some embodiments, a bit map based beam mask sequence may be used. The beam mask sequence may be implemented by a bit string of length K, where K is the total transmission opportunity for all beams. Each bit in the bit string may be assigned a value of "0" or "1". In the bit string, the positioning of a "1" bit indicates a transmission occasion (or subframe, symbol, or slot) that has been used for PRS transmission. If a bit in the beam mask sequence is set to "0," the corresponding transmission occasion is not used for PRS transmission. For each beam, the number of "1" bits may indicate the beam duration of the beam. Example implementations of the beam mask sequence are discussed below with reference to fig. 5 and 6.
Fig. 5 illustrates an example PRS transmission pattern 500 according to some example embodiments of the present disclosure.
In PRS transmission mode 500, PRS has PRS subframe offset 505 with respect to a reference time when sfn=0 and slot number=0. In beam pattern 510 as shown in fig. 5, PRSs are transmitted on three beams 215, indexed as beam #1, beam #2, and beam #3. To achieve diversity gain or support interference coordination, PRS transmissions on beam #1, beam #2, and beam #3 are interleaved. As shown in fig. 5, the beam duration 515 of beam #1 includes two discontinuous resource blocks 520, and each block 520 may include several subframes, slots, or symbols. Each block 520 represents one PRS transmission occasion. The beam pattern 510 may repeat within the PRS period 525.
In this example, the configuration of beam #1 may be indicated by bit sequence "100100", the configuration of beam #2 may be indicated by bit sequence "010010", and the configuration of beam #3 may be indicated by bit sequence "001001".
Fig. 6 illustrates an example PRS transmission pattern 600 according to some other example embodiments of the present disclosure.
In contrast to the PRS transmission pattern 500 shown in fig. 5, PRS transmissions on beam #1, beam #2, and beam #3 are consecutive in a beam pattern 610 of PRS transmission pattern 600. As shown in fig. 6, the beam duration 615 of beam #1 includes two consecutive resource blocks 520. In this case, the configuration of beam #1 may be indicated by bit sequence "110000", the configuration of beam #2 may be indicated by bit sequence "001100", and the configuration of beam #3 may be indicated by bit sequence "000011".
It should be appreciated that the above described bit mask schemes are exemplary only and not limiting. Other methods of indication of the beam pattern are also possible.
Still referring to fig. 4, at block 410, the UE 320 detects PRSs based on a beam pattern. For example, the UE 320 may know when and where to detect or measure PRSs. Taking the beam pattern 600 of fig. 6 as an example, the beam pattern 610 associated with three beams may be represented as a beam mask sequence "110000 001100 000011". Based on the beam mask sequence, UE 320 may derive a configuration for each beam. For example, for each beam, the beam duration may be derived based on the number of "1" bits, and the positioning of "1" represents the transmission occasion used for PRS transmissions with the beam.
Furthermore, UE 320 may design appropriate estimation algorithms based on the beam patterns to improve RSTD measurements and thereby improve positioning performance. Example optimizations of the estimation algorithm will be discussed with reference to fig. 7 (a), 7 (b) and 7 (c).
Fig. 7 (a) shows a conventional TOA estimation process 705 without beam combining in the case of using the beam pattern 610 shown in fig. 6. In this conventional estimation process 705, no information about the beam pattern of PRSs is provided to the UE 320.UE 320 independently estimates 710 TOA at each block 520. The minimum TOA may be selected as the estimated TOA.
Fig. 7 (b) shows another conventional TOA estimation process 715 with inter-beam combining if beam pattern 610 is used. In process 715, all (or some) of the blocks 520 for PRS transmissions with different beams are combined (720) to estimate TOA. The inter-beam combining may bring about a combined diversity gain over several blocks 520. However, due to the large phase shift difference between the different beams, it is possible to cancel most PRS signals received on the different beams. As a result, TOA estimation performance may be poor.
Fig. 7 (c) illustrates an example TOA estimation process 725 with intra-beam combining according to some example embodiments of the disclosure. In process 725, UE 320 may combine (730) block 520 for the beam duration of each beam to achieve a combined diversity gain. In addition, UE 320 may select the minimum TOA as the estimated TOA to achieve the selective diversity gain. In this way, high accuracy TOA values can be obtained to improve positioning accuracy.
In some embodiments, to further improve the RSTD measurement of the UE 320, the UE 320 may receive additional indications of beam patterns for transmitting PRSs in neighboring cells and then detect PRSs based on the beam patterns. The implementation of this indication is similar to the implementation of the indication of the beam pattern in the reference cell, the details of which will be omitted. In an implementation, the UE 320 may be provided with a beam pattern related to any suitable number of neighboring cells to improve positioning accuracy.
In order for the UE 320 to be able to know the beam patterns of PRSs in the reference cell or in a neighboring cell, the location server 340 may need to collect the beam patterns from the relevant base station. The detailed procedure and operation of the location server 340 will be described below with reference to fig. 8.
Fig. 8 illustrates a flowchart of an example method 800 according to some other embodiments of the present disclosure. The method 800 may be implemented at the location server 340 as shown in fig. 3. For discussion purposes, the method 800 will be described with reference to fig. 3.
At block 805, the location server 340 collects a set of beam patterns for transmitting a set of PRSs in a set of cells. The beam patterns may be collected by the location server 340 from surrounding base stations.
At block 810, the location server 340 selects a reference cell from the set of cells for the UE 320. At block 815, the location server 340 transmits a beam pattern for transmitting PRSs in a reference cell to the UE 320 via the base station 310.
In some embodiments, the location server 340 may also send the beam patterns in the neighboring cells to the UE 320. For example, the location server 340 may select a neighbor cell from the set of cells for the UE 320 and then send further indications of beam patterns for sending further PRSs in the neighbor cell.
As an example, location server 340 may send OTDOA assistance data comprising two elements to UE 320 via base station 310: OTDOA reference cell information and OTDOA neighbor cell information. Beam patterns related to PRS configurations for the reference cell and neighboring cells are included in the OTDOA assistance data.
Table 1 shows example additional PRS information elements related to beam patterns in OTDOA assistance data according to some example embodiments of the present disclosure.
TABLE 1
PRS configurations of the reference cell and one or more neighbor cells may be transmitted from the base station to a location server 340 (e.g., E-SMLC), and the location server 340 may then forward the PRS configurations to the UE 320. Using these beam patterns, RSTD measurements by UE 320 may be more effective and efficient.
Fig. 9 illustrates an example process 900 of beam pattern exchange between a base station 310, a location server 340, and a UE 320, according to some embodiments of the disclosure.
In process 900, location server 340 sends 905 an OTDOA information request for OTDOA information of the reference cell and neighboring cells to base station 310. The OTDOA information request may include a request for additional PRS information to provide a beam pattern to the base station 310.
The base station 310 delivers 910 an OTDOA information response to the location server 340. The OTDOA information response contains assistance data including, for example, additional beam pattern information for PRSs as shown in table 1.
Location server 340 sends 915 a provide assistance data (ProvideAssistanceData) message to UE 320, the message containing OTDOA assistance data. As shown in table 1, the OTDOA assistance data may include additional PRS information for the beam patterns of the reference cell and neighboring cells.
Location server 340 sends 920 a request location information RequestLocationInformation message to UE 320 to request RSTD measurements. The UE 320 then performs (925) RSTD measurements using the received assistance data. The assistance data includes the candidate cells for measurement and PRS configurations in table 1 thereof. Based on the assistance data, the UE will combine PRS signals transmitted with the same beam and obtain one combined TOA measurement as shown in fig. 7 (c). UE 320 provides 930 RSTD measurements to location server 340.
All of the operations and features described above with reference to fig. 3-7 (c) are equally applicable to the method 800 and have similar effects. Details will be omitted for the sake of simplicity.
In some embodiments, an apparatus capable of performing the method 400 or 800 may include means for performing the respective steps of the method 400 or 800. The component may be implemented in any suitable form. For example, the components may be implemented in circuitry or software modules.
In some example embodiments, an apparatus capable of performing the method 400 includes: means for receiving, at a user equipment, an indication of a beam pattern for transmitting positioning reference signals in a reference cell; and means for detecting a positioning reference signal based on the beam pattern.
In some example embodiments, the beam pattern may include at least one of a number of beams in a set of beams, a respective beam index of the beams, and a respective beam duration of the beams.
In some example embodiments, the apparatus may further include: means for receiving a further indication of a further beam pattern for transmitting a further positioning reference signal in a neighboring cell; and means for detecting further positioning reference signals based on the further beam pattern.
In some example embodiments, the indication may be received from a location server via a base station.
In some example embodiments, an apparatus capable of performing the method 800 comprises: means for collecting, at a location server, a set of beam patterns for transmitting a set of positioning reference signals in a set of cells; means for selecting a reference cell for a user equipment from a set of cells; and means for transmitting, via the base station, an indication of a beam pattern among the set of beam patterns to the user equipment, the beam pattern being used for transmitting positioning reference signals among the set of positioning reference signals in the reference cell.
In some example embodiments, the beam pattern may include at least one of a number of beams in the set of beams, a respective beam index of the beams, and a respective beam duration of the beams.
In some example embodiments, the apparatus may further include: means for selecting, for the user equipment, a neighboring cell from the set of cells; and means for transmitting, via the base station, a further indication of a further beam pattern from the set of beam patterns to the user equipment, the further beam pattern being used for transmitting a further positioning reference signal from the set of positioning reference signals in a neighboring cell.
Fig. 10 is a simplified block diagram of an apparatus 1000 suitable for implementing embodiments of the disclosure. The device 1000 may be implemented at the UE 320 or the location server 340 shown in fig. 3.
As shown, the device 1000 includes a processor 1010, a memory 1020 coupled to the processor 1010, a communication module 1030 coupled to the processor 1010, and a communication interface (not shown) coupled to the communication module 1030. Memory 1020 stores at least program 1040. The communication module 1030 is used for bi-directional communication, for example, via multiple antennas. The communication interface may represent any interface necessary for communication.
The program 1040 is assumed to include program instructions that, when executed by the associated processor 1010, enable the device 1000 to operate in accordance with embodiments of the present disclosure, as discussed herein with reference to fig. 1-9. The embodiments herein may be implemented by computer software executable by the processor 1010 of the device 1000, or by hardware, or by a combination of software and hardware. The processor 1010 may be configured to implement various embodiments of the present disclosure.
Memory 1020 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology such as, by way of non-limiting example, non-transitory computer readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. Although only one memory 1020 is shown in device 1000, there may be several physically distinct memory modules in device 1000. The processor 1010 may be of any type suitable for a local technology network and may include, as non-limiting examples, one or more of the following: general purpose computers, special purpose computers, microprocessors, digital Signal Processors (DSPs), and processors based on a multi-core processor architecture. The device 1000 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock that is synchronized to the master processor.
When device 1000 is acting as UE 320 or part of UE 320, processor 1010 and communication module 1030 may cooperate to implement method 400 as described above with reference to fig. 4-7 (c). When device 1000 is acting as location server 340 or part of location server 340, processor 1010 and communication module 1030 may cooperate to implement method 800 as described above with reference to fig. 8 and 9. All of the operations and features described above with reference to fig. 1-9 are equally applicable to the device 1000 and have similar effects. Details will be omitted for the sake of simplicity.
In general, the various embodiments of the disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of the example embodiments of the present disclosure are illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product comprises computer executable instructions, such as those included in program modules, that are executed in a device on a target real or virtual processor to perform the methods 400 and 800 as described above with reference to fig. 1-9. Generally, program modules include routines, programs, libraries, objects, classes, components, data types, etc. that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within local or distributed devices. In distributed devices, program modules may be located in both local and remote memory storage media.
Program code for carrying out the methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, computer program code or related data may be carried by any suitable carrier to enable a device, apparatus, or processor to perform the various processes and operations described above. Examples of the carrier include a signal, a computer-readable medium.
The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus or devices, or any suitable combination thereof. More specific examples of a computer-readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), an optical storage device, a magnetic storage device, or any suitable combination thereof.
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Also, while the above discussion contains several specific implementation details, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features specific to particular embodiments. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Various embodiments of the technology have been described. In addition to or in lieu of the foregoing, the following embodiments are described. The functionality described in any of the examples below may be used with other examples described herein.
Claims (14)
1. An apparatus for communication, comprising:
at least one processor; and
At least one memory including computer program code;
the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to:
Receiving, at a user equipment, an indication of a beam pattern for transmitting positioning reference signals in a reference cell, the beam pattern being associated with at least three beams in different directions; and
The positioning reference signal is detected based on the beam pattern,
Wherein the beam pattern comprises: a beam scanning period, a respective beam index of a beam of the at least three beams and a respective beam duration of the beam,
Wherein the respective beam index indicates which beam is used for transmission of the positioning reference signal in the respective beam duration.
2. The apparatus of claim 1, wherein the apparatus is further caused to:
Receiving a further indication of a further beam pattern for transmitting a further positioning reference signal in a neighboring cell; and
The further positioning reference signal is detected based on the further beam pattern.
3. The apparatus of claim 2, wherein the indication is received from a location server via a base station.
4. An apparatus for communication, comprising:
at least one processor; and
At least one memory including computer program code;
the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to:
Collecting a set of beam patterns at a location server, the set of beam patterns being used to transmit a set of positioning reference signals in a set of cells;
Selecting a reference cell from the set of cells for the user equipment; and
Transmitting, via a base station, an indication of a beam pattern among the set of beam patterns for transmitting positioning reference signals among the set of positioning reference signals in the reference cell, the beam patterns being associated with at least three beams in different directions,
Wherein the beam pattern comprises: a beam scanning period, a respective beam index of a beam of the at least three beams and a respective beam duration of the beam,
Wherein the respective beam index indicates which beam is used for transmission of the positioning reference signal in the respective beam duration.
5. The apparatus of claim 4, wherein the apparatus is further caused to:
Selecting a neighboring cell from the set of cells for the user equipment; and
Transmitting, via the base station, a further indication of a further beam pattern among the set of beam patterns to the user equipment, the further beam pattern being used for transmitting a further positioning reference signal among the set of positioning reference signals in the neighboring cell.
6. A method for communication, comprising:
Receiving, at a user equipment, an indication of a beam pattern for transmitting positioning reference signals in a reference cell, the beam pattern being associated with at least three beams in different directions; and
The positioning reference signal is detected based on the beam pattern,
Wherein the beam pattern comprises: a beam scanning period, a respective beam index of a beam of the at least three beams and a respective beam duration of the beam,
Wherein the respective beam index indicates which beam is used for transmission of the positioning reference signal in the respective beam duration.
7. The method of claim 6, further comprising:
Receiving a further indication of a further beam pattern for transmitting a further positioning reference signal in a neighboring cell; and
The further positioning reference signal is detected based on the further beam pattern.
8. The method of claim 7, wherein the indication is received from a location server via a base station.
9. A method for communication, comprising:
Collecting a set of beam patterns at a location server, the set of beam patterns being used to transmit a set of positioning reference signals in a set of cells;
Selecting a reference cell from the set of cells for the user equipment; and
Transmitting, via a base station, an indication of a beam pattern among the set of beam patterns for transmitting positioning reference signals among the set of positioning reference signals in the reference cell, the beam patterns being associated with at least three beams in different directions,
Wherein the beam pattern comprises: a beam scanning period, a respective beam index of a beam of the at least three beams and a respective beam duration of the beam,
Wherein the respective beam index indicates which beam is used for transmission of the positioning reference signal in the respective beam duration.
10. The method of claim 9, further comprising:
Selecting a neighboring cell from the set of cells for the user equipment; and
Transmitting, via the base station, a further indication of a further beam pattern among the set of beam patterns to the user equipment, the further beam pattern being used for transmitting a further positioning reference signal among the set of positioning reference signals in the neighboring cell.
11. An apparatus for communication, comprising:
Means for receiving, at a user equipment, an indication of a beam pattern for transmitting positioning reference signals in a reference cell, the beam pattern being associated with at least three beams in different directions; and
Means for detecting the positioning reference signal based on the beam pattern,
Wherein the beam pattern comprises: a beam scanning period, a respective beam index of a beam of the at least three beams and a respective beam duration of the beam,
Wherein the respective beam index indicates which beam is used for transmission of the positioning reference signal in the respective beam duration.
12. An apparatus for communication, comprising:
Means for collecting a set of beam patterns at a location server, the set of beam patterns being used to transmit a set of positioning reference signals in a set of cells;
means for selecting a reference cell from the set of cells for the user equipment; and
Means for transmitting, via a base station, an indication of a beam pattern among the set of beam patterns to the user equipment, the beam patterns being used for transmitting positioning reference signals among the set of positioning reference signals in the reference cell, the beam patterns being associated with at least three beams in different directions,
Wherein the beam pattern comprises: a beam scanning period, a respective beam index of a beam of the at least three beams and a respective beam duration of the beam,
Wherein the respective beam index indicates which beam is used for transmission of the positioning reference signal in the respective beam duration.
13. A computer readable storage medium comprising program instructions stored thereon, which when executed by a processor of a device, cause the device to perform the method of any of claims 6 to 8.
14. A computer readable storage medium comprising program instructions stored thereon, which when executed by a processor of a device, cause the device to perform the method of any of claims 9 to 10.
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PCT/CN2018/113415 WO2020087441A1 (en) | 2018-11-01 | 2018-11-01 | Beam pattern exchange for positioning reference signal measurement |
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US11792666B2 (en) * | 2020-06-04 | 2023-10-17 | Qualcomm Incorporated | Location assistance data for wideband positioning |
WO2022067755A1 (en) * | 2020-09-30 | 2022-04-07 | Nokia Shanghai Bell Co., Ltd. | Priority adaptation of positioning reference signal |
Family Cites Families (17)
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ATE517526T1 (en) * | 2008-05-30 | 2011-08-15 | Alcatel Lucent | METHOD AND BASE STATION FOR CONTROLLING BEAM FORMATION IN A MOBILE CELLULAR NETWORK |
US8401111B2 (en) * | 2009-03-13 | 2013-03-19 | Qualcomm Incorporated | Method and apparatus for sequencing and correlating a positioning reference signal |
CN103209475B (en) * | 2012-01-16 | 2016-05-25 | 华为技术有限公司 | Localization method, location-server, terminal and base station |
US9924381B2 (en) * | 2012-08-13 | 2018-03-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhancing uplink measurements for positioning by adaptively using multi-antenna systems |
CN103812546B (en) * | 2012-11-07 | 2017-08-25 | 华为技术有限公司 | A kind of reference signal mapping method based on aerial array, apparatus and system |
WO2015027118A1 (en) * | 2013-08-22 | 2015-02-26 | Qualcomm Incorporated | Utilizing a reference signal for indoor positioning |
US10557919B2 (en) * | 2014-03-28 | 2020-02-11 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Observed time difference of arrival angle of arrival discriminator |
US10033449B2 (en) * | 2014-12-16 | 2018-07-24 | Lg Electronics Inc. | Method for receiving reference signal in wireless communication system, and apparatus therefor |
WO2016129744A1 (en) * | 2015-02-13 | 2016-08-18 | 엘지전자 주식회사 | Scanning method using position information of terminal in wireless access system supporting millimeter waves and devices for same |
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CN106341882A (en) * | 2015-07-17 | 2017-01-18 | 北京信威通信技术股份有限公司 | Terminal positioning method of LTE system |
CN108702726B (en) * | 2016-03-24 | 2021-06-01 | 苹果公司 | Positioning method for 5G system |
US10021667B2 (en) * | 2016-06-23 | 2018-07-10 | Qualcomm Incorporated | Positioning in beamformed communications |
US10547421B2 (en) * | 2016-09-30 | 2020-01-28 | Qualcomm Incorporated | Scheduling for positioning reference signal (PRS) in narrowband-internet of things (NB-IoT) |
US11621747B2 (en) * | 2016-10-28 | 2023-04-04 | Qualcomm Incorporated | Receiver beamforming for measurements |
US10660109B2 (en) * | 2016-11-16 | 2020-05-19 | Qualcomm Incorporated | Systems and methods to support multiple configurations for positioning reference signals in a wireless network |
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