CN114208334A - Information exchange between network devices for coordinating sidelink communications - Google Patents
Information exchange between network devices for coordinating sidelink communications Download PDFInfo
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- CN114208334A CN114208334A CN201980099233.2A CN201980099233A CN114208334A CN 114208334 A CN114208334 A CN 114208334A CN 201980099233 A CN201980099233 A CN 201980099233A CN 114208334 A CN114208334 A CN 114208334A
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- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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Abstract
The present invention relates to communications in wireless communication networks, and more particularly to sidelink communications for User Equipment (UE), such as sidelink-to-any (V2X) communications. The invention provides a network device and a method for the network device. The network device is configured to receive Sidelink Radio Information (SRI) and/or sidelink quality of service (QoS) information (SQI) from another network device. The SRI and/or SQI comprise at least one measurement result related to a sidelink of a User Equipment (UE). The network device is further configured to configure the sidelink according to the received SRI and/or SQI.
Description
Technical Field
The present invention relates to communications in wireless communication networks, and more particularly to sidelink communications for User Equipment (UE), such as sidelink-to-any (V2X) communications. The invention provides a network device and a method for the network device. The network device may receive or exchange information including one or more sidelink-related measurements with at least one other network device to enhance coordination of sidelink communications.
Background
In a wireless communication network, when a UE (e.g., a vehicle) is out of coverage, or when the UE autonomously selects resources (e.g., mode 2 in 5G PC5, or mode 4 in LTE PC5), a set of Tx and Rx sidelink resource pools are preconfigured in the UE and used for sidelink control information and sidelink data exchange [3GPP TS 36.331 ].
Proper configuration of these sidelink resource pools and other Tx/Rx parameters is important for efficient sidelink communications, e.g., for sidelink quality of service (QoS) and sidelink service continuity, especially in the case of V2X applications.
In particular, there is a need to dynamically configure sidelink resource pools due to dynamic circumstances (e.g., mobility of UEs, road and radio conditions, etc.). A Base Station (BS) or Radio Access Network (RAN) may be used to configure the sidelink resource pool R3-190382. The UE's sidelink resource pool and Tx/Rx configuration (mode 2NR PC5) should be dynamically updated to improve sidelink capacity and QoS performance.
The 3GPP defines two metrics that characterize the sidelink channel state and support the UE to take the necessary configuration actions:
channel Busy Ratio (CBR): a subchannel section in which a measured Received Signal Strength Indication (RSSI) in the resource pool exceeds a preconfigured threshold.
Channel occupancy (CR): an indication of the channel utilization of the transmitter itself is defined as the total number of subchannels used for transmission in sub-frame [ n-k, n-1 ] and granted in sub-frame [ n, n + b ] divided by the total number of subchannels within [ n-k, n + b ].
CBR and CR values are reported to BS [36.331] periodically. However, CBR, CR and other sidelink radio measurements are only reported from the UE to the BS, but not exchanged between BSs (inter-cell).
As shown in fig. 1, the cell served by the BS may cover more than one area (here, area 1, area 2, area 3) or resource pool. An area refers to a geographic area in which a certain pool of resources is active. One area or resource pool may span two or more cells. CBR information from only one cell may not be sufficient for the BS to make a good decision on the required configuration of the resources of the resource pool and/or the appropriate size of the resource pool. However, sub-optimal configurations (e.g., due to partial information from a single cell) will negatively impact interference, data rate, reliability, etc.
Region-based resource pool configuration has been proposed in LTE V2X (mode 4), and it seems that NR V2X (mode 2) is also applicable. The sidelink is divided into geographical 'regions'. The UE selects a radio resource pool according to the area in which it is located. And the UE obtains the identifier of the area where the UE is located according to the position of the UE. If two UEs are far enough away from each other, they determine that they are located in different areas, and therefore they will use orthogonal resource pools, thereby minimizing the impact of near-far effects.
An operations, administration and maintenance (OAM) system or V2X application server may define regions (this is called "region planning"), resources for each region, and a pool of resources for a region. However, both have specific disadvantages:
OAM: first, overhead is reported, since in this case all radio and QoS sidelink reports of the BS must be forwarded to the OAM. Secondly, RAN functionality (radio resource management) needs to be transferred to the network management entity. Third is that the adaptation/reconfiguration speed of the sidelink resource pool is slow compared to the RAN solution, especially in high dynamic environments.
V2X application server: first, the disadvantages are the same as those of the OAM scheme. Second, the V2X application does not have any resource management functions, nor a direct interface with the BS (e.g., CBR) that collects sidelink radio and QoS information.
The systemlnformationblocktype 21 contains the V2X sidelink communications configuration (sl-V2X-ConfigCommon), in particular:
the resource pool to be used for V2X reception (the resource pool indicated by V2x-CommRxpool in sl-V2X-ConfigCommon).
The resource pool to be used for V2X transmission (V2 x-the resource pool indicated by comm (tm) port normalcommon, etc.).
CBR measurements are made on the Tx pool.
However, such semi-static configuration (of SIB21, for example) is sub-optimal, OAM may not be fast enough to fit into a region or resource pool in high mobility situations.
In LTE V2X, cbr-pssch-TxConfig is applied to the resource pool for V2X sidelink traffic transmission. It adjusts transmission parameters, including: PPPP, range of retransmission times per TB, range of number of psch RBs, MCS range, maximum limit of channel occupancy, etc. The UE may adjust the parameters of the resource pool according to the CBR measurement and the PPPP of the service. However, Tx parameter adaptation based on single cell measurements is not efficient due to lack of information of neighboring cells and/or resource pools.
According to SA 2V 2X analysis [3GPP, TR 23.786] and RAN2 discussion, a 5G QoS indicator (5G QoS indicator, 5QI) or QoS flow ID (QoS flow ID, QFI) framework may be used as a basis for QoS support in the sidelink for NR V2X. PC 55 QI (PQI) has been proposed for the NR side uplink and supports the full QoS framework of PC5, which includes QoS parameters such as latency, reliability, priority, data rate, etc. Sidelink QoS monitoring 3GPP R2-1904877 is discussed in RAN2, enabling a UE to monitor, measure and report QoS metrics it actually experiences in the sidelink: optimization of V2X communications (e.g., RRM), more guaranteed and reliable sidelink communications and network feedback can thereby be achieved to potentially adjust QoS-related configurations and/or policies.
The AS-Config IE contains information about RRC configuration information in the source enodeb (eNB) that the target eNB can use to determine the necessity to change Radio Resource Control (RRC) configuration during Handover (HO) preparation phase. Such information may also be used after successful HO is performed or during RRC connection re-establishment or recovery. RRC messages for the sidelink PC5 (mode 1/3 and mode 2/4) transmitted to or from the eNB through the X2 interface or the S1 interface are as follows: SL-CommConfig-r12, SL-DiscConfig-r12, SL-V2X-ConfigDedcated-r 14 (specifying the dedicated configuration information for V2X sidelink communications). However, sidelink V2X (mode 2) does not exchange BS/inter-node measurement reports.
Disclosure of Invention
In view of the above disadvantages, embodiments of the present invention aim to improve the current implementations. It is an object to provide a network device and method which may improve the sidelink communication of a UE in a wireless communication network, in particular the sidelink V2X communication. In particular, coordination of UE-side uplink communications in a wireless communication network should be enhanced. In addition, the sidelink communications should support the required QoS. Furthermore, interference on the sidelink for NR mode 2 communications should be reduced. In addition, the safety and service continuity in the case of V2X application should be improved.
This object is achieved by the embodiments of the invention described in the appended independent claims. Advantageous realizations of embodiments of the invention are further defined in the dependent claims.
A first aspect of the present invention provides a network device configured to: receiving Sidelink Radio Information (SRI) and/or Sidelink QoS Information (SQI) from another network device, the SRI and/or SQI comprising at least one measurement result related to a sidelink of the UE; and configuring the sidelink according to the received SRI and/or SQI.
The network device of the first aspect may be a RAN device, a BS, a gNB, a small cell, a cloud RAN device, or a Mobile Edge Computing (MEC) device. Configuring the sidelink may include configuring sidelink parameters. Configuring the sidelink may include initially configuring the sidelink, reconfiguring the sidelink, or determining the sidelink. As will be discussed below, configuring the sidelink may include configuring a sidelink resource pool, configuring a validity region associated with the sidelink resource pool, configuring a sidelink Tx parameter, configuring a scheduled time duration for communicating over the sidelink, and/or configuring resources for communicating over the sidelink.
One or more measurements included in the SRI and/or the SQI are related to the sidelink of the UE. These measurements may be provided by the UE (and possibly by one or more other UEs). Alternatively, these measurements may be provided by the one or more UEs, and possibly some additional processing/combining at the network device. Alternatively, these measurements may be obtained by the network device (and/or possibly by another network device), e.g., the one or more network devices may estimate the amount of resources scheduled by the network device (BS) for the UE to engage in sidelink communications. Configuring the sidelink according to the received SRI and/or SQI may include: configuring a sidelink according to at least one measurement included in the received SRI and/or SQI. Configuring the sidelink may also include configuring the sidelink in accordance with other information included in the SRI and/or SQI (described further below).
The network device of the first aspect supports exchanging information, in particular information of one or more sidelink related measurements, between two or more network devices in a wireless communication network. Thus, coordination of sidelink communications in the network may be enhanced. For example, the QoS required for sidelink V2X communications may be supported in the network, interference on the sidelink (particularly for NR mode 2 communications) may be reduced, and security and service continuity in the V2X application case may be supported. In general, the network device of the first aspect is thus capable of improving sidelink communications, in particular sidelink V2X communications, for UEs in the network.
In an implementation form of the first aspect, the received SRI and/or SQI includes at least one measurement of a sidelink resource pool used by the UE, and the network device is configured to configure the sidelink resource pool according to the received SRI and/or SQI.
The network device may provide one or more resource pools to the UE (and possibly other UEs). The UE/UEs may use, i.e. select, sidelink resources from, these resource pools. The network device may configure these sidelink resource pools using SRI and/or SQI. The sidelink resource pool includes one or more sidelink resources. The sidelink resources may include or may be frequency resources such as subcarriers, and/or time resources such as symbols, and/or frequency-time resources, and/or spatial resources such as beams or spatial filters. Configuring the sidelink resource pool may include initially configuring the sidelink resource pool, reconfiguring or adapting the sidelink resource pool, or determining the sidelink resource pool.
In one implementation of the first aspect, the network device is further configured to configure a geographical validity region in which the UE may use the sidelink resource pool according to the received SRI and/or SQI.
Multiple validity regions may also be configured. The validity region may also be a region without a sidelink resource pool. Different validity regions may have the same sidelink resource pool. The validity region may be a region as described above. Configuring the validity region may include initially configuring the validity region, reconfiguring or adapting (e.g., resizing) the validity region, or determining the validity region.
In one implementation form of the first aspect, the received SRI and/or SQI comprises at least one measurement of a sidelink Tx parameter used by the UE, and/or the network device is configured to configure the sidelink Tx parameter used by the UE according to the received SRI and/or SQI.
The network device may configure, inter alia, the Tx parameters, wherein the at least one measurement is included in the SRI and/or the SQI. Configuring the Tx parameters may include initially configuring the Tx parameters, reconfiguring or adapting the Tx parameters, or determining the Tx parameters. The Tx parameters may include at least one of: threshold, (maximum) Tx power, Modulation and Coding Scheme (MCS), range of retransmission times.
In an implementation manner of the first aspect, the network device is further configured to configure, according to the received SRI and/or SQI, a semi-persistent scheduling (SPS) duration for communicating through the sidelink.
Configuring the SPS duration may include initially setting the SPS duration, changing the SPS duration, or determining the SPS duration.
In an implementation manner of the first aspect, the network device is further configured to configure one or more resources allocated for communication through the sidelink according to the received SRI and/or SQI.
The one or more sidelink resources may be specifically allocated by a scheduler (network device), e.g., disposed at the BS. Using SRI and/or SQI, the scheduler may configure its allocation/grant for sidelink communications accordingly, e.g., multiple frequency resources, multiple time-frequency resources, multiple spatial resources, etc.
In one implementation of the first aspect, the received SRI includes at least one measurement of a sidelink radio metric, the at least one measurement indicating a status of a channel of the sidelink.
In one implementation of the first aspect, the at least one measurement of the sidelink radio metric comprises at least one of: an average of the metric over a particular region or portion of the region; a maximum value of the metric in a particular region or a portion of the region; or all values of the at least one measurement of the metric.
The SRI may include monitored/measured values of the sidelink radio metrics or may include expected/estimated/predicted values of the sidelink radio metrics.
In one implementation of the first aspect, the sidelink radio metric comprises at least one of: CBR; CR; side link reference signal received power (SL-RSRP); a sidelink received signal strength indicator (SL-RSSI); or a loading level.
Alternatively or additionally, the sidelink metric may include at least one of: a sidelink signal-to-noise-plus-interference ratio; a sidelink reference signal reception quality; block error rate.
In one implementation of the first aspect, the SRI further comprises at least one of: a cell ID of a cell served by another network device; a region ID of a region associated with a sidelink resource pool used by the UE for the sidelink; a resource pool ID for a sidelink resource pool for the sidelink by the UE; a geographic area in which the at least one measurement is made; a resource identifier and/or a time unit used by the UE for the sidelink communication; channel and/or sub-channel identifiers used by the UE for the sidelink communications; or a radio frequency used by the UE for the sidelink communication.
In one implementation of the first aspect, the SQI comprises at least one measurement of a sidelink QoS parameter, the at least one measurement comprising at least one of: a sidelink data rate; a sidelink delay; sidelink packet error rate; sidelink packet reception rate; or side link inter-packet reception.
The SQI may include monitored/measured values of the sidelink QoS parameter and may also include expected/estimated/predicted values of the sidelink QoS parameter.
In one implementation of the first aspect, the at least one measurement of the sidelink QoS parameter comprises at least one of: an average value of the parameter over a particular area or a portion of the area; a maximum value of the parameter in a particular region or a portion of the region; or all values of the at least one measurement of the parameter.
In an implementation form of the first aspect, the received SQI further comprises at least one of: a cell ID of a cell served by another network device; a region ID of a region associated with a sidelink resource pool used by the UE for the sidelink; a resource pool ID for a sidelink resource pool for the sidelink by the UE; a geographic area in which the at least one measurement is made; a resource identifier and/or a time unit used by the UE for the sidelink communication; channel and/or sub-channel identifiers used by the UE for the sidelink communications; or a radio frequency used by the UE for the sidelink communication.
In one implementation manner of the first aspect, the network device is further configured to send the received SRI and/or SQI to another network device.
In one implementation of the first aspect, the network device is further configured to receive at least one measurement result related to a sidelink used by the UE from the UE, and send an SRI and/or an SQI including the at least one measurement result received from the UE to another network device.
A UE from which a network device receives at least one measurement may be different from a UE that includes at least one sidelink-related measurement in an SRI and/or SQI received from another network device.
In one implementation of the first aspect, the network device is further configured to receive information about the sidelink from the other network device; and/or transmit information about the sidelink to the other network device.
In particular, a network device may exchange information regarding the configuration of a sidelink (e.g., sidelink resource pool configuration, frequency information, bandwidth information, sidelink resource configuration, UE Tx/Rx configuration for sidelink transmissions) with another network device.
In an implementation manner of the first aspect, the network device is further configured to receive a request for configuring the sidelink from a management device, and further configure the sidelink according to the received request.
The network device may also provide SRI and/or SQI to a network management device (or core network entity or application server) for sidelink reconfiguration (e.g., resource pool optimization). The management device may configure the sidelink (e.g., sidelink resource pool, validity region, etc.) based on the received SRI and/or SQI.
In one implementation of the first aspect, the received SRI and/or SQI comprises at least one measurement provided with information that the UE records the measurement over a certain amount of time and/or over a specific geographical area.
A second aspect of the present invention provides a method for a network device, the method comprising: receiving an SRI and/or SQI from another network device, the SRI and/or SQI including at least one measurement related to a sidelink of the UE; and configuring the sidelink according to the received SRI and/or SQI.
In one implementation of the second aspect, the received SRI and/or SQI comprises at least one measurement of a sidelink resource pool used by the UE, and the method comprises configuring the sidelink resource pool according to the received SRI and/or SQI.
In one implementation of the second aspect, the method further comprises configuring a geographical validity region in which the UE may use the sidelink resource pool in accordance with the received SRI and/or SQI.
In one implementation of the second aspect, the received SRI and/or SQI comprises at least one measurement of a sidelink Tx parameter used by the UE, and/or the method comprises configuring a sidelink Tx parameter used by the UE according to the received SRI and/or SQI.
In one implementation form of the second aspect, the method further comprises: and configuring the duration of semi-static scheduling for communication through the sidelink according to the received SRI and/or SQI.
In one implementation form of the second aspect, the method further comprises: one or more resources configured for communication allocation over the sidelink in accordance with the received SRI and/or SQI.
In one implementation of the second aspect, the received SRI includes at least one measurement of a sidelink radio metric, the at least one measurement indicating a status of a channel of the sidelink.
In one implementation of the second aspect, the at least one measurement of the sidelink radio metric comprises at least one of: an average of the metric over a particular region or portion of the region; a maximum value of the metric in a particular region or a portion of the region; or all values of the at least one measurement of the metric.
In one implementation of the second aspect, the sidelink radio metric comprises at least one of: CBR; CR; side link reference signal received power (SL-RSRP); a sidelink received signal strength indicator (SL-RSSI); or a loading level.
In one implementation of the second aspect, the SRI further comprises at least one of: a cell ID of a cell served by another network device; a region ID of a region associated with a sidelink resource pool used by the UE for the sidelink; a resource pool ID for a sidelink resource pool for the sidelink by the UE; a geographic area in which the at least one measurement is made; a resource identifier and/or a time unit used by the UE for the sidelink communication; channel and/or sub-channel identifiers used by the UE for the sidelink communications; or a radio frequency used by the UE for the sidelink communication.
In one implementation of the second aspect, the SQI comprises at least one measurement of a sidelink QoS parameter, the at least one measurement comprising at least one of: a sidelink data rate; a sidelink delay; sidelink packet error rate; sidelink packet reception rate; or side link inter-packet reception.
In one implementation of the second aspect, the at least one measurement of the sidelink QoS parameter comprises at least one of: an average value of the parameter over a particular area or a portion of the area; a maximum value of the parameter in a particular region or a portion of the region; or all values of the at least one measurement of the parameter.
In one implementation of the second aspect, the received SQI further comprises at least one of: a cell ID of a cell served by another network device; a region ID of a region associated with a sidelink resource pool used by the UE for the sidelink; a resource pool ID for a sidelink resource pool for the sidelink by the UE; a geographic area in which the at least one measurement is made; a resource identifier and/or a time unit used by the UE for the sidelink communication; channel and/or sub-channel identifiers used by the UE for the sidelink communications; or a radio frequency used by the UE for the sidelink communication.
In one implementation of the second aspect, the method further comprises sending the received SRI and/or SQI to another network device.
In one implementation of the second aspect, the method further comprises receiving at least one measurement result from the UE relating to a sidelink used by the UE, and sending an SRI and/or an SQI comprising the at least one measurement result received from the UE to another network device.
In one implementation of the second aspect, the method further comprises receiving information about the sidelink from the other network device; and/or transmit information about the sidelink to the other network device.
In one implementation of the second aspect, the method further includes receiving a request from a management device to configure the sidelink, and further configuring the sidelink according to the received request.
In one implementation of the second aspect, the received SRI and/or SQI comprises at least one measurement provided with information that the UE records the measurement over a certain amount of time and/or over a specific geographical area.
The method of the second aspect and its implementations achieves the same advantages and effects as described above for the network device of the first aspect and its corresponding implementations. Furthermore, the same definitions, explanations and variants as given above in relation to the network device of the first aspect apply.
A third aspect of the invention provides a computer program which, when executed by a processor, causes the method of the second aspect or any implementation of the second aspect to be performed.
In the above-described aspects and implementations, communication between network devices (i.e., exchanging SRIs and/or SQI) may occur over any interface, e.g., directly over an interface (e.g., Xn in 5G, X2 in LTE), or any core network interface.
It should be noted that all devices, elements, units and components described in the present application may be implemented in software or hardware elements or any type of combination thereof. All steps performed by the various entities described in the present application, as well as the functions described to be performed by the various entities, are intended to indicate that the respective entities are adapted or used to perform the respective steps and functions. Although in the following description of specific embodiments specific functions or steps to be performed by an external entity are not reflected in the description of specific detailed elements of the entity performing the specific steps or functions, it should be clear to a skilled person that the methods and functions may be implemented in corresponding hardware or software elements or any combination thereof.
Drawings
The foregoing aspects and implementations of the invention are explained in the following description of specific embodiments, associated with the accompanying drawings, wherein:
fig. 1 illustrates how one cell covers more than one area or resource pool, and one area or resource pool may span two or more cells;
FIG. 2 illustrates a network device provided by an embodiment of the invention;
FIG. 3 illustrates an example of SRI/SQI exchanged between network devices provided by an embodiment of the present invention;
FIG. 4 illustrates a general framework for information exchange between network devices provided by embodiments of the present invention;
FIG. 5 illustrates an example of interactions between a management device and a network device for resource pool optimization provided by embodiments of the present invention;
fig. 6 illustrates information exchange between network devices in case of UE out of coverage provided by an embodiment of the present invention;
fig. 7 illustrates a method provided by an embodiment of the invention.
Detailed Description
Fig. 2 illustrates a network device 200 provided by an embodiment of the invention. In general, network device 200 may be a RAN device or RAN entity. The network device 200 may be, inter alia, a BS, a small cell, a cloud RAN device, an MEC device, etc. The network device 200 is used to support coordination between sidelink communications, particularly sidelink V2X communications in a wireless communication network.
In particular, network device 200 may include processing circuitry (not shown in fig. 2) for performing, implementing, or initiating the various operations of network device 200 described herein. The processing circuitry may include hardware and software. The hardware may include analog circuitry or digital circuitry, or both analog and digital circuitry. The digital circuit may include an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a Digital Signal Processor (DSP), or a multi-purpose processor. In one embodiment, a processing circuit includes one or more processors and non-transitory memory coupled to the one or more processors. The non-transitory memory may carry executable program code that, when executed by one or more processors, causes network device 200 to perform, implement, or initiate the operations or methods described herein.
The network device 200 is further configured to configure (or adapt or reconfigure or determine) the sidelink 204 based on the received SRI 201 and/or SQI 202, in particular based on at least one measurement 203. To this end, the network device 200 may include a configuration unit for configuring the sidelink 204. The configuration unit may be implemented by the processing circuitry (e.g., as described above).
A plurality of network devices 200/200' may exchange one or more SRIs 201 and/or SQI 202 in a wireless communication network, where each SRI 201 and/or SQI 202 may include at least one sidelink-related measurement 203. That is, inter-cell switching of SRI 201 and/or SQI 202 may be performed. Accordingly, at least one measurement 203 of one or more sidelink 204 (e.g., a measurement 203 of one or more sidelink resource pools) may be exchanged between neighboring cells/network devices 200/200' (or other RAN entities).
The one or more sidelink-related measurements 203 may include:
included in SRI 201, e.g. CBR, CR
E.g. time delay, data rate included in SQI 202
Inter-cell exchange of sidelink related measurements 203 may be used for RAN based sidelink configuration, in particular for RAN based resource pool (re) configuration (mode 2NR V2X), for example:
resource pool and area 301 adaptation (e.g. resource, geographical area planning). For example, the network device 200 may be configured to configure one or more sidelink resource pools from the received SRI 201 and/or SQI 202, in particular from the at least one measurement 203. The network device 200 may also configure a geographic validity region in which one or more sidelink resource pools may be used by the UE 205 according to the received SRI 201 and/or SQI 202. Network device 200 may also be configured to communicate the allocated one or more resources over sidelink 204 based on the received SRI 201 and/or SQI 202.
UE side uplink Tx parameter optimization or scheduling optimization. For example, the network device 200 may configure one or more Tx parameters used by the UE 205 according to the received SRI 201 and/or SQI 202, in particular according to the at least one measurement 203. The network device 200 may also configure a duration of the SPS for communicating over the sidelink according to the received SRI 201 and/or SQI 202.
Fig. 3 illustrates an example of SRI 201 and/or SQI 202 exchange between network devices 200/200' provided by an embodiment of the invention. Included in SRI 201 and/or SQI 202 are at least one measurement 203, e.g., a sidelink radio measurement (e.g., CBR and/or CR of sidelink 204), and/or a QoS measurement (e.g., latency and/or reliability) of sidelink 204, related to sidelink 204 (e.g., between two UEs 205). The one or more measurements 203 may be measurements of a sidelink resource pool between neighboring network devices 200/200' (of neighboring cells). Each sidelink resource pool may correspond to a zone 301. Area 301 may span more than one cell (served by one network device 200/200'). One cell may cover more than one area 301. One or more measurements 203 may be used for region 301 and/or sidelink resource pool configuration, such as:
configuration or reconfiguration of one or more sidelink resource pools (e.g., adapting the number of resources allocated in a sidelink resource pool or zone 301; or performing (new) zone 301 planning, or resizing, etc.).
Adjusting one or more UE 205 side uplink Tx parameters (e.g., adjusting a threshold, (maximum) Tx power, MCS, number of subchannels, and/or range of retransmission times, etc.).
Fig. 4 illustrates a general framework for information exchange (i.e., exchange of SRI 201 and/or SQI 202) between network devices 200/200' provided by embodiments of the present invention.
SRI 201 exchanged between network device 200/200' (here illustratively a BS) via Xn or S1 may include any of the following fields:
cell ID
Region ID
Resource pool ID
The geographic region (e.g., a subset of an area or resource pool) of the cell's collected measurements 203
Resource ID and/or time unit
Channel and/or sub-channel IDs
Sidelink radio frequency
·CBR PSSCH
·CBR PSCCH
·CR
·SL-RSRP
·SL-RSSI
Load level
Different reporting configurations may be considered for inter-cell exchange of CBRs and/or CRs, etc. For example, the average of a center of the area grid/resource pool or a portion of the area grid/resource pool may be switched; and/or the maximum of a center of the area grid or a portion of the area grid may be exchanged; and/or all collected values at the cell may be exchanged (e.g., by UE measurement reports).
The SQI 202 exchanged between the network devices 200/200' (here illustratively BSs) via Xn or S1 may include any of the following fields:
cell ID
Region ID
Resource pool ID
The geographic region (e.g., a subset of an area or resource pool) of the cell's collected measurements 203
Resource ID and/or time unit
Channel and/or sub-channel IDs
Sidelink radio frequency, sidelink data rate (e.g., per PQI)
Sidelink latency (e.g., per PQI)
Sidelink packet error rate (e.g., per PQI)
Sidelink PRR
Sidelink PIR
For any of the above parameters, different reporting configurations may be considered for inter-cell QoS exchanges. For example, the average of a center of the area grid/resource pool or a portion of the area grid/resource pool may be switched; and/or the maximum of a center of the area grid or a portion of the area grid may be exchanged; and/or all collected values at the cell may be exchanged (e.g., by UE measurement reports).
Further, monitored (detected, measured) or expected QoS values may be exchanged (e.g., the latter based on prediction, statistical analysis, etc.).
Fig. 5 illustrates an example of interaction (e.g., RAN device or entity) between a management device 500 (e.g., OAM or V2X application server/AF or any other core network entity) and a network device 200 provided by an embodiment of the present invention. In general, network device 200 may receive a request 501 from management device 500 to configure sidelink 204 (see left side of FIG. 5), and may then configure sidelink 204 further according to the received request 501 (e.g., according to parameters such as area ID, pool ID included in request 501; in addition to configuring sidelink 204 according to SRI 201 and/or SQI 202). This interaction may be particularly useful for sidelink resource pool optimization. The network device 200 may reply with an ACK or NACK to the request 501 of the management device 500.
The network device 200 may also send a request 502 to the management device 500 to enable the RAN-based sidelink resource pool (see right side of fig. 5). The request 502 may include a zone ID, pool ID, and the like. The management device 500 may reply with an ACK or NACK or STOP (STOP) to this request 502 of the network device 200.
Interaction/coordination between the network device 200 and the management device 500 may be performed to activate RAN-level sidelink resource pool configuration or reconfiguration and/or V2X optimization to avoid concurrent optimization. The inter-cell SRI 201 and/or SQI 202 exchange may be enabled by/after the interaction. For sidelink-related measurements 203 of one or more sidelink resource pools between neighboring network devices 200/200', coordination/interaction between the network device 200 and the management device 500 may be introduced, namely:
enabling and configuring inter-cell sidelink measurement 203 exchanges
The measurements 203 of the sidelink 204 are exchanged between the network devices 200/200' participating in the validity area.
Fig. 6 illustrates the exchange of information between network devices 200 provided by embodiments of the present invention for the case where the UE 205 is out of coverage (mode 2NR V2X communication-out of coverage case).
The exchange of information between network devices 200 (i.e., the exchange of information by SRI 201 and/or SQI 202 (e.g., including one or more measurements 203 of a sidelink resource pool)) may be exchanged between network devices 200, even in certain scenarios where the UE 205 is not in the coverage of any network device 200 (here, a BS). For example, for smaller or larger areas of no coverage. In this scenario, the network device 200 may receive a logged (i.e., out-of-coverage) report from the UE 205 and may (re) configure the sidelink 204 in an area of no coverage. For example, the network devices may (re) configure one or more sidelink resource pools (e.g., size, resources) allocated to the area of no coverage. In particular, the SRI 201 and/or the SQI 202 may comprise at least one measurement 203 provided with information that the UE 205 records the measurement 203 (the measurement 203 is received from the UE 205) within a certain amount of time and/or within a specific geographical area. That is, the SRI 201 and/or the SQI 202 may include logged measurements 203 and online (in-coverage) measurements 203, respectively. Mode 2 of sidelink communication may be used.
According to the RAN2105 protocol, the RAN2 supports mode 2 resource configuration for a given validity region, wherein the UE 205 does not need to acquire a new mode 2 resource configuration when moving in the validity region, at least when the configuration is provided by a System Information Block (SIB), e.g. to reuse the validity region of a New Radio (NR) SIB. The purpose of the validity region is to keep the sidelink resources unchanged in order to achieve stable performance and reduce latency as the UE 205 moves within a particular area. The validity region may also be the region 301 as described above.
The exchange of radio measurements 203 and QoS information by SRI 201 and/or SQI 202 may be used to adapt the validity region configuration, e.g. to increase the resources of the resource pool allocated to the validity region. This means that the network device 200 may configure the (geographical) validity area in which the UE 205 may use the sidelink resource pool, according to the SRI 201 and/or the SQI 202, in particular according to at least one measurement 103 comprised in the SRI 201 and/or the SQI 202.
Fig. 7 illustrates a method 700 provided by an embodiment of the invention. Method 700 may be performed by or in network device 200 or network device 200'. The method 700 comprises the steps 701: receiving an SRI 201 and/or an SQI 202 from another network device 200', wherein the SRI 201 and/or the SQI 202 comprise at least one measurement 203 relating to a sidelink 204 of a UE 205. Further, the method 700 comprises step 701: the sidelink 204 is configured (or reconfigured, or adapted, or determined) according to the received SRI 201 and/or SQI 202, in particular according to the at least one measurement 203.
The invention has been described in connection with various embodiments and implementations as examples. However, other variations can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the independent claims. In the claims as well as in the description, the word "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. A single element or other unit may fulfill the functions of several entities or items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Claims (20)
1. A network device (200) configured to:
receiving, from another network device (200'), a sidelink radio information, SRI, (201) and/or a sidelink quality of service, QoS, information, SQI, (202), the SRI (201) and/or SQI (202) comprising at least one measurement (203) relating to a sidelink (204) of a user equipment, UE, (205); and
configuring the sidelink (204) according to the received SRI (201) and/or SQI (202).
2. The network device (200) of claim 1, wherein:
the received SRI (201) and/or SQI (202) comprises at least one measurement (203) of a sidelink resource pool used by the UE (205), and
the network device (200) is configured to configure the sidelink resource pool according to the received SRI (201) and/or SQI (202).
3. The network device (200) of claim 2, further configured to:
configuring a geographical validity area in which the UE (205) can use the sidelink resource pool, according to the received SRI (201) and/or SQI (202).
4. The network device (200) according to any of claims 1 to 3, wherein:
the received SRI (201) and/or SQI (202) comprises at least one measurement (203) of a sidelink Tx parameter used by the UE (205), and/or
The network device (200) is configured to configure sidelink Tx parameters for use by the UE (205) according to the received SRI (201) and/or SQI (202).
5. The network device (200) of any of claims 1-4, further configured to:
configuring a duration of semi-persistent scheduling for communication over the sidelink (204) in accordance with the received SRI (201) and/or SQI (202).
6. The network device (200) of any of claims 1-5, further configured to:
one or more resources configured for communication allocation over the sidelink (204) in accordance with the received SRI (201) and/or SQI (202).
7. The network device (200) according to any of claims 1 to 6, wherein:
the received SRI (201) comprises at least one measurement (203) of a sidelink radio metric, the at least one measurement indicating a state of a channel of the sidelink (204).
8. The network device (200) of claim 7, wherein:
the at least one measurement (203) of the sidelink radio metric comprises at least one of:
-an average of said measure over a specific area (301) or a part of said area (301);
-a maximum value of the metric in a specific area (301) or part of the area (301); or
-all values of said at least one measurement of said metric.
9. The network device (200) according to claim 7 or 8, wherein:
the sidelink radio metric comprises at least one of:
-a channel busy ratio CBR;
-a channel occupancy CR;
-a sidelink reference signal received power SL-RSRP;
-a sidelink received signal strength indicator SL-RSSI; or
-a load level.
10. The network device (200) according to any of claims 1 to 9, wherein:
the SRI (201) further comprises at least one of:
-a cell ID of a cell served by the other network device (200');
-a region ID of a region (301) associated with a sidelink resource pool used by the UE (205) for the sidelink (204);
-a resource pool ID of a sidelink resource pool used by the UE (205) for the sidelink (204);
-a geographical area in which the at least one measurement (203) is made;
-a resource identifier and/or a time unit used by the UE (205) for the sidelink communication;
-a channel and/or sub-channel identifier used by the UE (205) for the sidelink (204) communication; or
-a radio frequency used by the UE (205) for the sidelink communication.
11. The network device (200) according to any of claims 1 to 10, wherein:
the SQI (202) comprises at least one measurement (203) of a sidelink QoS parameter, the at least one measurement comprising at least one of:
-a sidelink data rate;
-a sidelink delay;
-sidelink packet error rate;
-sidelink packet reception rate; or
-sidelink inter-packet reception.
12. The network device (200) of claim 11, wherein:
the at least one measurement (203) of the sidelink QoS parameter comprises at least one of:
-an average value of said parameter over a specific area (301) or a part of said area (301);
-a maximum value of said parameter in a specific area (301) or part of said area (301); or
-all values of said at least one measurement of said parameter.
13. The network device (200) according to any of claims 1 to 12, wherein:
the received SQI (202) further comprises at least one of:
-a cell ID of a cell served by the other network device (200');
-a region ID of a region (301) associated with a sidelink resource pool used by the UE (205) for the sidelink (204);
-a resource pool ID of a sidelink resource pool used by the UE (205) for the sidelink (204);
-a geographical area in which the at least one measurement (203) is made;
-a resource identifier and/or a time unit used by the UE (205) for the sidelink communication;
-a channel and/or sub-channel identifier used by the UE (205) for the sidelink communication; or
-a radio frequency used by the UE (205) for the sidelink communication.
14. The network device (200) of any of claims 1-13, further configured to:
sending the received SRI (201) and/or SQI (202) to another network device (200').
15. The network device (200) according to any of claims 1-14, configured to:
receiving, from the UE (205), at least one measurement (203) related to a sidelink (204) used by the UE (205); and
sending, to another network device (200'), an SRI (201) and/or an SQI (202) comprising the at least one measurement (203) received from the UE (205).
16. The network device (200) according to any of claims 1-15, configured to:
receiving information about the sidelink (204) from the other network device (200'); and/or
Sending information about the sidelink (204) to the other network device (200').
17. The network device (200) of any of claims 1-16, further configured to:
receiving a request (501) to configure the sidelink (204) from a management device (500); and
configuring the sidelink (204) further in accordance with the received request (501).
18. The network device (200) according to any of claims 1-17, wherein:
the received SRI (201) and/or SQI (202) comprises at least one measurement (203) provided with information that the UE (205) records the measurement (203) for a certain amount of time and/or within a specific geographical area.
19. A method (700) for a network device (200), the method (700) comprising:
receiving (701) side-link radio information, SRI, (201) and/or side-link quality of service, QoS, information, SQI, (202) from another network device (200'), the SRI (201) and/or SQI (202) comprising at least one measurement (203) related to a side-link (204) of a user equipment, UE, (205); and
configuring (701) the sidelink (204) according to the received SRI (201) and/or SQI (202).
20. A computer program, characterized in that the computer program, when executed by a processor, causes the method (700) according to claim 19 to be performed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2019/071708 WO2021028025A1 (en) | 2019-08-13 | 2019-08-13 | Information exchange between network devices for coordination of sidelink communications |
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| CN114208334A true CN114208334A (en) | 2022-03-18 |
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| US10778387B2 (en) * | 2016-11-23 | 2020-09-15 | Huawei Technologies Co., Ltd. | System and method for group-assisted downlink transmission |
| CN111527780B (en) * | 2017-12-11 | 2023-03-24 | 上海诺基亚贝尔股份有限公司 | Method, device and computer readable medium for device-to-device communication |
| US10827380B2 (en) * | 2018-01-30 | 2020-11-03 | Huawei Technologies Co., Ltd. | System and method for supporting URLLC in advanced V2X communications |
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