WO2017148511A1 - Rapport de transfert intercellulaire et de mesure pour un groupe de terminaux dans un véhicule au niveau d'un sous-groupe - Google Patents

Rapport de transfert intercellulaire et de mesure pour un groupe de terminaux dans un véhicule au niveau d'un sous-groupe Download PDF

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Publication number
WO2017148511A1
WO2017148511A1 PCT/EP2016/054386 EP2016054386W WO2017148511A1 WO 2017148511 A1 WO2017148511 A1 WO 2017148511A1 EP 2016054386 W EP2016054386 W EP 2016054386W WO 2017148511 A1 WO2017148511 A1 WO 2017148511A1
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Prior art keywords
group
sub
wireless devices
measurement
rnn
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PCT/EP2016/054386
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English (en)
Inventor
Xiaohui Wang
Jens JANSSON
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Telefonaktiebolaget Lm Ericsson (Publ)
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Priority to PCT/EP2016/054386 priority Critical patent/WO2017148511A1/fr
Publication of WO2017148511A1 publication Critical patent/WO2017148511A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements

Definitions

  • Embodiments herein relate generally to a Radio Network Node (RNN), and to methods therein.
  • RNN Radio Network Node
  • embodiments relate to mobility management in a wireless communications network.
  • Communication devices such as terminals are also known as e.g. User
  • Terminals are enabled to communicate wirelessly in a wireless communications network, such as a Wireless Local Area Network (WLAN), or a cellular communications network sometimes also referred to as a cellular radio system or cellular networks.
  • WLAN Wireless Local Area Network
  • the communication may be performed e.g. between two terminals, between a terminal and a regular telephone and/or between a terminal and a server via an access network and possibly one or more core networks, comprised within the wireless communications network.
  • the above terminals or wireless devices may further be referred to as mobile telephones, cellular telephones, laptops, or tablets with wireless capability, just to mention some further examples.
  • the terminals or wireless devices in the present context may be, for example, portable, pocket-storable, hand-held, computer-comprised, or vehicle- mounted mobile devices, enabled to communicate voice and/or data, via the access network, such as a Radio Access Network (RAN), with another entity, such as another terminal or a server.
  • RAN Radio Access Network
  • the communications network covers a geographical area which is divided into geographical subareas, such as coverage areas, cells or clusters.
  • each cell area is served by an access node such as a base station, e.g. a Radio Base Station (RBS), which sometimes may be referred to as e.g. "eNB”, “eNodeB”, “NodeB”, “B node”, or Base Transceiver Station (BTS), depending on the technology and terminology used.
  • RBS Radio Base Station
  • eNB Radio Base Station
  • eNodeB eNodeB
  • BTS Base Transceiver Station
  • the base stations may be of different classes such as e.g. macro eNodeB, home eNodeB, micro eNode B or pico base station, based on transmission power, functional capabilities and thereby also cell size.
  • a cell is the geographical area where radio coverage is provided by the base station at a base station site.
  • One base station, situated on the base station site, may serve one or several cells. Further, each base station may support one or several communication technologies.
  • the base stations communicate over the air interface operating on radio frequencies with the wireless devices within range of the base stations.
  • the expression Downlink (DL) is used for the transmission path from the base station to the wireless device.
  • the expression Uplink (UL) is used for the transmission path in the opposite direction i.e. from the wireless device to the base station.
  • base stations which may be referred to as eNodeBs or even eNBs, may be directly connected to one or more core networks.
  • 3GPP LTE radio access standard has been written in order to support high bitrates and low latency both for uplink and downlink traffic. All data transmission is in LTE controlled by the radio base station.
  • Mobility is one of the corner stones of the 3GPP systems. Conventionally mobility management is carried out individually for each wireless device comprised in the communications network.
  • the serving eNB sometimes herein also referred to as a source eNB, configures the measurement events and sends the configurations to a given wireless device, e.g. UE, via Radio Resource Control (RRC) signalling.
  • RRC Radio Resource Control
  • the wireless device measures one or more requested parameters such as Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ) and reports the measurement results back to the serving eNB periodically or when an event criterion is met.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • Figure 1 is a signalling diagram schematically illustrating the handover process according to prior art.
  • the serving eNB i.e. the source eNB
  • sends, Action 101 an RRC measurement control signal to the wireless device, e.g. the UE.
  • the wireless device performs measurements and reports, Action 102, measurement results to the source eNB as indicated in the RRC measurement control signalling.
  • the source eNB determines that a target cell served by a target eNB is more suitable than the serving cell
  • the source eNB sends, Action 103, an Handover request to the target eNB which may respond, Action 104, with an Handover request Acknowledgement.
  • the source eNB sends, Action 105, an RRC connection reconfiguration message to the wireless device, and in Action 106 a Random Access Channel (RACH) procedure is performed between the wireless device and the target eNB.
  • RACH Random Access Channel
  • the wireless device sends, Action 107, a RRC connection reconfiguration complete message to the target eNB, which sends, Action 108, a path switch request to an Mobility
  • the MME sends, Action 109, a modify bearer request to a Serving-Gateway (SGW) and when the bearer has been modified, the SGW responds, Action 1 10, to the MME with a modify bearer response.
  • the MME transmits, Action 1 1 1 , a path switch request complete message to the target eNB, whereby in Action 1 12 user data bearers are established between the wireless device and the SGW.
  • the target eNB transmits a UE release command to the source eNB.
  • the source eNB has released the wireless device, the handover from the source eNB to the target eNB is completed and the target eNB is the new serving eNB for the wireless device.
  • the conventional mobile management method described above may be replaced by a group mobile management, due to the fact that the wireless devices in the train behave similarly, and thus may be treated as a mobility group instead of individual wireless devices. Thereby, signalling congestion, high interference and delay may be avoided or reduced.
  • US 20150181481 describes such a group mobile management. Especially, US 20150181481 describes cooperating nodes, and methods therein, for mobility procedures in a wireless communication system supporting UE groups.
  • One of the cooperating nodes is a base station being associated with a UE group comprising UEs having correlated mobility related parameters.
  • the method in the base station comprises receiving, from a first UE in the UE group, a mobility related parameter associated with the first UE.
  • the method further comprises determining whether to initiate a mobility related procedure for a second UE in the UE group based on the received mobility related parameter; and further comprises initiating the mobility related procedure for the second UE when it is determined that the mobility related procedure is to be performed.
  • prediction and decisions related to mobility events e.g. handover events, for the second UE or for the whole group may be performed e.g. before or without receiving any mobility information related to the second UE, thereby enabling early prediction and better preparation, which can lead to more robust mobility procedures.
  • a drawback with the existing solution is that it is based on the assumption that all the UEs in a high-speed train behave in such a similar manner that the mobility management procedures based on the reported measurements from one or a few UEs is applicable to all of them.
  • the prior art provides suboptimal mobility management procedures wherein a mobility management procedure may be started for a UE not requiring it resulting in unnecessary signalling in the communications network that may cause signalling congestion, increase signal interference and delay in the communications network.
  • the object is achieved by a method performed by a Radio Network Node (RNN) for performing mobility management in a wireless communications network.
  • RNN Radio Network Node
  • the RNN is associated with a group of wireless devices having similar mobility parameters, wherein the RNN and the wireless devices are operating in the wireless communications network.
  • the RNN divides the wireless devices of the group into at least two sub-groups, wherein each sub-group comprises wireless devices being associated with a service level that is unique for the respective sub-group.
  • the RNN configures at least one wireless device in each sub-group to perform a measurement and to report a measurement result.
  • the RNN performs mobility management on the wireless devices comprised in the sub-group based on a reported measurement result when a
  • the object is achieved by a Radio Network Node (RNN) for performing mobility management in a wireless communications network.
  • RNN Radio Network Node
  • the RNN is associated with a group of wireless devices having similar mobility parameters.
  • the RNN and the wireless devices are operating in the wireless communications network.
  • the RNN is configured to divide the wireless devices of the group into at least two sub-groups, wherein each sub-group comprises wireless devices being associated with a service level that is unique for the respective sub-group.
  • the RNN is configured to configure at least one wireless device in each sub-group to perform a measurement and to report a measurement result. Furthermore, the RNN is configured to perform mobility management on the wireless devices comprised in the sub-group based on a reported measurement result when a measurement according to the configuration is reported.
  • the object is achieved by a computer program, comprising instructions which, when executed on at least one processor, causes the at least one processor to carry out the method performed by the RNN.
  • the object is achieved by a carrier comprising the computer program, wherein the carrier is one of an electronic signal, an optical signal, a radio signal or a computer readable storage medium.
  • each sub-group comprises wireless devices being associated with a service level that is unique for the respective sub-group
  • at least one wireless device in each sub-group is configured to perform a measurement and to report a measurement result
  • the RNN performs mobility management on the wireless devices comprised in the sub-group based on a reported measurement result when a measurement according to the configuration is reported
  • different mobility actions may be taken for the different sub-groups of the group of wireless devices.
  • the needs or requirements of the different sub-groups may be taken into consideration when performing the mobility actions.
  • not all wireless devices comprised in the subgroup need to perform measurements and report results, thereby reducing the load in the communications network. This results in an improved performance in the communications network.
  • An advantage with embodiments herein is that they provide adaptive methods for mobility management in the communications network thereby ensuring efficient, reliable, fast and/or fair mobility management based on selected measurement configurations and reports.
  • Another advantage with embodiments herein is that sub-groups having a high priority may be handled earlier than sub-groups having a low priority. Yet another advantage with some embodiments herein is that by using a selected wireless device for performing measurements and for reporting measurement results uncertainty caused by measurements and reports performed by weak wireless devices, e.g. wireless devices with low signal strength, in the same sub-group is avoided and the signalling load is reduced.
  • weak wireless devices e.g. wireless devices with low signal strength
  • Another advantage with embodiments herein is that they enable a relative minimum of signalling load per user service level as compared to the prior art. The reason is that by dividing the group of wireless devices into sub-groups based on service levels the minimum of signalling load for the group may be configured lower as compared to the prior art having a group of wireless devices with mixed service levels.
  • Figure 1 is a signalling diagram schematically illustrating a handover process according to prior art
  • Figure 2 schematically illustrates embodiments of a wireless communications network
  • Figure 3 is a flowchart schematically illustrating embodiments of a method performed by a Radio Network Node
  • Figure 4 is a block diagram schematically illustrating embodiments of a Radio Network Node.
  • a drawback with the existing solution as described in e.g. US 20150181481 is that it is based on the assumption that all the wireless devices in a high-speed train behave in such a similar manner that the mobility management procedures based on the reported measurements from one or a few of the wireless devices is applicable to all of them as a single group.
  • the users are running different applications on their respective wireless devices, they are sitting close to or away from the windows, and the Radio Network Nodes (RNNs), e.g. the eNBs, may be located on the left or right side of the high speed train.
  • RNNs Radio Network Nodes
  • the existing group communication method needs to be developed further to facilitate the deployment of joint communications in a high speed train.
  • joint communications when used herein is meant that the communications of the wireless devices in the group are handled jointly, i.e. as a group and not individually.
  • wireless devices having similar mobility parameters when used in this disclosure is meant wireless devices that are located within similar proximity, such as within similar geographical proximity, and/or having similar speed and direction.
  • the wireless devices having similar mobility parameters may be located within a high-speed train. Therefore, as mentioned above, according to embodiments herein, a way of improving the performance in a wireless communications system is provided.
  • wireless devices having similar mobility parameters may be divided into various sub-groups in terms of their requirements on service level, e.g. on quality of service or signal qualities.
  • one or more wireless devices are selected to perform measurements and to report measurement results to a RNN, e.g. a serving RNN.
  • the one or more wireless devices may be selected based on one or more conditions, such as their respective location in relation to the RNN. For example, a wireless device located close to the left or right windows of a high-speed train may be selected since such a located wireless device may be better for the case when a plurality of RNNs, e.g.
  • RNNs are placed on both sides of the railway.
  • the RNN may use one or more available tools, such as timeToTrigger, reportlnterval or reportAmount, to configure the measurements for the one or more selected wireless devices in order to share measurement loads among several wireless devices and to increase diversity and reliability of the reports.
  • timeToTrigger reportlnterval
  • reportAmount reportAmount
  • the sub-groups may be based on a requested Quality of Service (QoS) by each wireless device, and for sub-groups with a high QoS demand a more intense mobility measurement reporting may be used than for sub-groups with a low QoS demand.
  • QoS Quality of Service
  • the RNN may configure the wireless devices in a subgroup to report sparsely but with time offsets between the different wireless devices such that the RNN receives reports from the sub-group more densely than reports from each individual wireless device.
  • the RNN may use the last received report from one wireless device in the sub-group as a proxy for the whole sub-group, and may for example take a mobility management decision, such as a handover decision, for the whole sub-group based on that report.
  • the RNN may select the one or more wireless devices to perform the measurements and reports based on their respective condition for performing the measurement and for reporting the result.
  • the condition may be signal strength, signal quality or battery life time. Then, the RNN may configure the
  • the RNN may perform several mobility management procedures, e.g. handover procedures, simultaneously for all sub-groups possibly with different priorities.
  • WCDMA Wideband Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • GSM Global System for Mobile Communications
  • Embodiments herein relate to a wireless communications network 200 as schematically illustrated in Figure 2.
  • the wireless communications network 200 may be a cellular communications network.
  • the communications 5 network 200 may be an LTE network, a WCDMA network, an GSM network, any 3GPP cellular network, Wimax, or any other wireless communications network or system.
  • a core network 202 may be comprised in the wireless communications network 200.
  • the core network 202 is configured to operate in the wireless communications
  • the core network 202 may be a wireless core network such as an LTE core network, e.g. an Evolved Packet Core (EPC) network; a WCDMA core network; a GSM core network; any 3GPP core network; WiMAX core network; or any cellular core network.
  • LTE core network e.g. an Evolved Packet Core (EPC) network
  • WCDMA core network e.g. an Evolved Packet Core (EPC) network
  • WCDMA core network e.g. an Evolved Packet Core (EPC) network
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System for Mobile communications
  • a network node 204 may be comprised in the wireless communications network 15 200.
  • the network node 204 is comprised in the core network 202, and then the network node 204 may be referred to as a core network node.
  • the network node 204 is configured to operate in the wireless communications network 200, e.g. in the core network 202.
  • the network node 204 may be a Mobile Switching Center (MSC), a Mobility
  • MME Management Entity
  • O&M Operation & Maintenance
  • S-GW Serving General Packet Radio Service (GPRS) Node
  • GPRS General Packet Radio Service Node
  • a group of wireless devices 206 is also comprised in and operates in the wireless communications network 200. That is the group of wireless devices 206 is
  • the group of wireless devices 206 comprises a plurality of wireless devices 206-1 , 206-2, 206-3, 206-x each of which is configured to operate in the wireless communications network 200.
  • the plurality of wireless devices 206-1 , 206-2, 206-3, 206-x comprised in the group 206 of wireless devices have the same or similar mobility parameters, e.g. they are
  • the group 206 of wireless devices may be located within a confined area 206a, such as an area located within a high-speed train.
  • the group 206 of wireless device is configured to travel together with the confined area 206a, e.g. with the high-speed train. This is schematically illustrated in Figure 2, as
  • the group 206 of wireless devices located within the confined area 206a e.g. within the high-speed train, is travelling from a point A to a point B in a direction indicated by the arrow and with a velocity v.
  • UE user equipment
  • wireless devices examples include target devices, device to device UEs, machine type UEs or UEs capable of machine to machine communication, Personal Digital Assistants (PDA), iPADs, Tablets, mobile terminals, smart phones, Laptop Embedded Equipped (LEE), Laptop Mounted Equipment (LME), USB dongles etc.
  • PDA Personal Digital Assistants
  • iPADs iPADs
  • Tablets mobile terminals
  • smart phones Laptop Embedded Equipped (LEE), Laptop Mounted Equipment (LME), USB dongles etc.
  • LEE Laptop Embedded Equipped
  • LME Laptop Mounted Equipment
  • communications device wireless device and UE are used interchangeably.
  • user equipment used in this disclosure also covers other communications devices such as Machine Type of Communication (MTC) device, an Internet of Things (loT) device, e.g. a Cellular loT (CloT) device.
  • MTC Machine Type of Communication
  • LoT Internet of Things
  • CloT Cellular loT
  • user equipment used in this document also covers other wireless devices such as Machine to Machine (M2M) devices, even though they do not have any user.
  • MTC Machine Type of Communication
  • LoT Internet of Things
  • M2M Machine to Machine
  • a first Radio Network Node (RNN) 208 is comprised in the wireless
  • the first RNN 208 is configured to operate in the wireless communications network 200.
  • the first RNN 208 may be a radio access node such as a radio base station, for example an eNodeB, also denoted eNB, a Home eNodeB, or a NodeB or any other network node capable to serve a wireless device or a group 206 of wireless devices when located within a first geographical area 208a in a wireless communications network, such as the communications network 200.
  • eNodeB also denoted eNB
  • a Home eNodeB or a NodeB or any other network node capable to serve a wireless device or a group 206 of wireless devices when located within a first geographical area 208a in a wireless communications network, such as the communications network 200.
  • the first RNN 208 manages or is configured to manage communication with one or more wireless devices in the first geographical area 208a.
  • this is also referred to as the RNN 208 is associated with the group 206 of wireless devices 206-2
  • the first geographical area 208a is sometimes referred to as a first coverage area or a first cell wherein the first RNN 208 provides radio coverage.
  • a second Radio Network Node (RNN) 210 is comprised in the wireless communications network 200.
  • the second RNN 210 is configured to operate in the wireless communications network 200.
  • the second RNN 210 may be a radio access node such as a radio base station, for example an eNodeB, also denoted eNB, a Home eNodeB, or a NodeB or any other network node capable to serve a wireless device or a group 206 of wireless devices when located within a second geographical area 210a in a wireless communications network, such as the communications network 200.
  • this is also specified as the second RNN 210 manages or is configured to manage communication with one or more wireless devices in the second geographical area 210a.
  • this is also referred to as the second RNN 210 is associated with the group 206 of wireless devices 206-2, 206-3, 206-x when they are located within the second geographical area 210a.
  • the second geographical area 210a is sometimes referred to as a second coverage area or a second cell wherein the second RNN 210 provides radio coverage.
  • the first RNN 208 and the first geographical area 208a are referred to as just the RNN 208 and the geographical area 208a, respectively, while the second RNN 210 and the second geographical area 210a are referred to as the neighbour RNN 210 and the neighbour geographical area 210a, respectively.
  • RNNs are Node Bs, Base Stations (BSs), Multi-Standard Radio (MSR) nodes such as MSR BS, eNode Bs, network controllers, Radio Network Controllers (RNCs), Base Station Controllers (BSCs), relays, donor nodes controlling relay, Base Transceiver Stations (BTSs), Access Points (APs), transmission points, transmission nodes, Radio Remote Units (RRUs), Remote Radio Heads (RRHs), nodes in Distributed Antenna System (DAS) etc.
  • BSs Base Stations
  • MSR Multi-Standard Radio
  • MSR Multi-Standard Radio
  • the RNN 208 is associated with the group 206 of wireless devices 206-1 ,206-2, ..,206-x having similar mobility parameters.
  • the group 206 of wireless devices 206-1 ,206-2, ..,206-x having similar mobility parameters may comprise wireless devices 206-1 ,206-2, ..,206-x located within similar proximity, such as within similar geographical proximity, and/or having similar speed and direction.
  • the RNN 208 and the wireless devices 206-1 ,206-2, ..,206-x are operating in the wireless communications network 200.
  • the methods comprise one or more of the following actions. It should be understood that these actions may be taken in any suitable order and that some actions may be combined. Action 301
  • the RNN 208 divides the wireless devices 206-1 ,206-2,..,206-x of the group 206 into at least two sub-groups, wherein each sub-group comprises wireless devices 206- 1 ,206-2, ..,206-x being associated with a service level that is unique for the respective sub-group. This is done in order to group one or more wireless devices 206-1 ,206- 2, ..,206-x being associated with the same or similar service level into a sub-group. For example, the wireless devices 206-1 and 206-x running applications associated with a first service level may be grouped into a first sub-group and the wireless devices 206-2 to 206-(x-1 ) running applications associated with a second service level may be group into a second sub-group.
  • the sub-group may be referred to as a cluster.
  • the above-mentioned group 206 of wireless devices 206-1 206-x may be divided into at least two clusters.
  • the first sub-group of wireless devices 206-1 ,206- 2, ..,206-x associated with a first service level has a first priority and the second subgroup of wireless devices 206-1 ,206-2, ..,206-x associated with a second service level has a second priority, wherein the first priority is higher than the second priority.
  • the service level may relate to a Quality of Service (QoS) level, such as QoS given by a QoS Class Identifier (QCI).
  • QoS Quality of Service
  • QCI QoS Class Identifier
  • the service level may be a service level of one or more active bearers of the respective wireless device comprised in the sub-group.
  • the different wireless devices 206-1 ,...206-x may be running various applications which may have different QCIs.
  • watching streaming video may have a QCI equal to 7
  • web- browsing or social-networking may have a QCI equal to 8
  • making voice calls may have a QCI equal to 1 .
  • three sub-groups may be formed.
  • a first sub-group may comprise the wireless devices running an application for voice calls, such as Voice over LTE (VoLTE), and it may be given a highest priority since it has the lowest QCI.
  • a second sub-group may comprise the wireless devices running an application for streaming video, and it may be given a middle priority since it has the middle QCI.
  • a third sub-group may comprise the wireless devices running an application for non-time critical browsing or social-networking, and it may be given the lowest priority since it has the highest QCI.
  • the RNN 208 may select a number of wireless devices, e.g. one or more wireless devices, to perform the measurements and to report the result back to the RNN 208.
  • a number of wireless devices e.g. one or more wireless devices.
  • the RNN 208 selects at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group to perform a measurement and to report a measurement result based on measurements of strength and/or quality of signals received from the wireless devices 206-1 ,206-2, ..,206-x comprised in the respective
  • CQIs Channel Quality Indicators
  • the RNN 208 may select the least one wireless device 206-1 ,206-2, ..,206- x in each sub-group by measuring the strength or quality of signals received from the wireless device 206-1 ,206-2, ..,206-x comprised in the sub group.
  • the wireless device 206-1 ,206-2, ..,206-x comprised in the sub group.
  • the RNN 208 may use the reported CQI values, as a result of the locations of the wireless device 206-1 ,206-2, ..,206-x in the high speed train in relation to the location of the RNN 208.
  • the locations of the wireless device 206-1 ,206- 2, ..,206-x in a high-speed train in relation to the RNN 208 may be at the left or right hand side of the railway or at an elevation over the train.
  • the RNN 208 configures at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group to perform a measurement and to report a measurement result.
  • the RNN 208 configures the at least one wireless device 30 206-1 ,206-2, ..,206-x in each sub-group to perform the measurement and to report the measurement result by further configuring the at least one wireless device 206-1 ,206- 2, ..,206-x in each sub-group with a parameter set for the measurement, which parameter set is specific for the sub-group, and by assigning to the at least one wireless device 206-1 ,206-2, ..,206-x a point in time when to start the measurement. This may be 35 done in order to control one of more of: the measurement to be performed, when it is to be performed, at what interval it is to be performed, what threshold value is related to the measurement and how to report the measurement result.
  • the parameter set comprises one or more of:
  • the first sub-group of wireless devices 206-1 ,206-2, ..,206-x associated with the first service level has the first priority and the second sub-group of wireless devices 206-1 ,206-2, ..,206-x associated with the second service level has the second priority, wherein the first priority is higher than the second priority.
  • the measurement report interval may be set smaller for the first sub-group of wireless devices 206-1 ,206-2, ..,206-x than for the second subgroup of wireless devices 206-1 ,206-2, ..,206-x. Thereby, more measurements reports may be received from the first sub-group than for the second sub-group during the same period of time.
  • a threshold value relating to a handover measurement may be set lower for the first sub-group of wireless devices 206-1 ,206- 2, ..,206-x than for the second sub-group of wireless devices 206-1 ,206-2, ..,206-x.
  • the RNN 208 may configure the at least one wireless device 206-1 ,206-2, ..,206- x in each sub-group to perform the measurement and to report the measurement result by further configuring each of the at least one wireless devices 206-1 ,206-2, ..,206-x with a respective weight based on their respective one or more conditions for performing the measurement and for reporting the measurement result.
  • the one or more conditions may comprise one or more of: a signal strength, a signal quality, and a battery life time.
  • the RNN 208 may configure a pre-defined number of wireless devices 206- 1 ,...206-x in each sub-group to perform measurements and to report measurement results with the parameter set specific for the sub-group.
  • the measurement parameter reportlnterval may be set smaller for the sub-group having a higher priority than another sub-group so that RNN 208 may get more timely measurement reports of RSRP or RSRQ. Thereby, the RNN 208 may handle the sub-group with higher priority more rapidly.
  • the RNN 208 may set a lower offset value to a threshold for the sub-group with higher priority in a handover triggering event, such as an Event A4, so that candidate neighbours may be reported earlier to the RNN 208.
  • the RNN 208 may earlier check which neighbour RNN 210 may provide the on-going services and thus be selected as a handover candidate.
  • the RNN 208 may divide the measurements and reports among them by increasing the measurement parameter reportlnterval, decreasing the measurement parameter reportAmount and adjusting the measurement parameter timeToTrigger for one or more of them. This way the reports will be distributed over time, they will not rely on a specific wireless device and the
  • the RNN 208 may even take the conditions of the wireless devices into consideration when configuring the measurements and the RNN 208 may set different weights accordingly, e.g. more frequently measurements and reports for wireless devices in better conditions e.g. for wireless devices having a charging capability and when charging is enabled in the high speed train.
  • the RNN 208 performs mobility management on the wireless devices 206-1 ,206- 2,..,206-x comprised in the sub-group based on a reported measurement result when a measurement according to the configuration is reported.
  • the reported measurement result is a measurement result received from the at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group configured to perform the measurement and to report the measurement result as described in Action 303 above.
  • the RNN 208 receives the measurement result(-s) from the at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group.
  • the RNN 208 performs the mobility management on the wireless devices 206-1 ,206-2, ..,206-x comprised in the sub-class based on the reported measurement result, by triggering the wireless devices 206-1 ,206-2, ..,206-x comprised in the sub-group to perform a handover procedure to a neighbour RNN 210 when one or more criterion for handover to the neighbour RNN 210 are met for a majority of the at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group performing the measurement.
  • the performed measurements and the reported measurement results may trigger the RNN 208 to perform a mobility management procedure, such as a handover procedure, if one or more criterions for the mobility management procedure, e.g. the handover procedure, are met for a majority of the reporting wireless devices.
  • a mobility management procedure such as a handover procedure
  • the mobility management procedure e.g. the handover procedure, in the RNN
  • the criterions for the mobility management procedure e.g. the handover procedure
  • a sub-group with a higher priority is proposed to be configured to identify a good neighbour RNN 210 e.g. an Event A4, or a poor coverage of the RNN 208 via e.g. an Event A2 earlier than for a sub-group with a lower priority.
  • the RNN 208 may prepare and execute the handover procedure for the sub-group with the higher priority
  • the RNN 208 may be configured according to an
  • the RNN 208 is associated with the group 206 of wireless devices 206-1 ,206-2, ..,206-x having similar mobility parameters.
  • the group 206 of wireless devices 206-1 ,206-2, ..,206-x having similar mobility parameters may comprise wireless devices 206-1 ,206-2, ..,206-x located within 25 similar proximity, such as within similar geographical proximity, and/or having similar speed and direction.
  • the RNN 208 and the wireless devices 206-1 ,206-2, ..,206- x are operating in the wireless communications network 200.
  • the RNN 208 comprises an input and output interface
  • the input and output interface 400 may comprise a wireless receiver (not shown) and a wireless transmitter (not shown).
  • the RNN 208 is configured to receive, e.g. by means of a receiving module 401 configured to receive, transmissions from one or more wireless devices, e.g. one or more of the wireless device 206-1 , 206-2, ..,206-x, or from one or more network nodes, e.g. the network node 204 or the neighbour node 210.
  • the receiving module 401 may be 5 implemented by or arranged in communication with a processor 408 of the RNN 208.
  • the processor 408 will be described in more detail below.
  • the RNN 208 is configured to receive a measurement result from at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group, which at least one wireless device 206-1 ,206-2, ..,206-x is configured to perform measurement(-s) and to 10 report measurement result(-s) to the RNN 208.
  • the RNN 208 is configured to transmit, e.g. by means of a transmitting module 402 configured to transmit, transmissions to one or more wireless devices, e.g. one or 15 more of the wireless device 206-1 ,206-2, ..,206-x, or to one or more network nodes, e.g. the network node 204 or the neighbour node 210.
  • the transmitting module 402 may be implemented by or arranged in communication with the processor 408 of the RNN 208.
  • the RNN 208 is configured to divide, e.g. by means of a dividing module 403 20 configured to divide, the wireless devices 206-1 ,206-2, ..,206-x of the group into at least two sub-groups, wherein each sub-group comprises wireless devices 206-1 ,206- 2, ..,206-x being associated with a service level that is unique for the respective subgroup
  • the dividing module 403 may be implemented by or arranged in communication with the processor 408 of the RNN 208.
  • the service level may relate to a QoS level, such as QCI.
  • a first sub-group of wireless devices 206-1 ,206-2, ..,206-x associated with a first service level may have a first priority and a second sub-group of wireless devices 206- 1 ,206-2, ..,206-x associated with a second service level may have a second priority, wherein the first priority is higher than the second priority.
  • the RNN 208 may be configured to select, e.g. by means of a selecting module 404 configured to select, at least one wireless device 206-1 ,206-2, ..,206-x in each subgroup to perform a measurement and to report a measurement result.
  • the selecting module 404 may be implemented by or arranged in communication with the processor 35 408 of the RNN 208.
  • the RNN 208 selects the at least one wireless device 206- 1 ,206-2, ..,206-x in each sub-group to perform the measurement and to report the measurement result based on measurements of strength and/or quality of signals received from the wireless devices 206-1 ,206-2, ..,206-x comprised in the respective sub-group or based on CQIs reported from the wireless devices 206-1 ,206-2, ..,206-x comprised in the respective sub-group.
  • the RNN 208 is configured to configure, e.g. by means of a configuring module 405 configured to configure, at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group to perform a measurement and to report a measurement result.
  • the configuring module 405 may be implemented by or arranged in communication with the processor 408 of the RNN 208.
  • the RNN 208 is configured to configure the at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group to perform the measurement and to report the measurement result by further being configured to configure the at least one wireless device in each sub-group with a parameter set for the measurement, which parameter set is specific for the sub-group, and to assign the at least one wireless device a point in time when to start the measurement.
  • the parameter set may comprise one or more of:
  • the first sub-group of wireless devices 206-1 ,206-2, ..,206-x associated with the first service level has the first priority and the second sub-group of wireless devices 206-1 ,206-2, ..,206-x associated with the second service level has the second priority, wherein the first priority is higher than the second priority.
  • the RNN 208 is configured to set the measurement report interval is smaller for the first sub-group of wireless devices 206-1 ,206-2, ..,206-x than for the second sub-group of wireless devices 206-1 ,206-2, ..,206-x.
  • the RNN 208 is configured to set a threshold value relating to a handover measurement lower for the first sub-group of wireless devices 206-1 ,206-2, ..,206-x than for the second sub-group of wireless devices 206- 1 ,206-2, ..,206-x.
  • the RNN 208 may be configured to configure the at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group to perform the measurement and to report the 5 measurement result by further being configured to configure each of the at least one wireless devices 206-1 ,206-2, ..,206-x with a respective weight based on their respective one or more conditions for performing the measurement and for reporting the measurement result, wherein the one or more conditions comprise one or more of: a signal strength, a signal quality, and a battery life time.
  • the RNN 208 is configured to perform, e.g. by means of a performing module 406 configured to perform, mobility management on the wireless devices 206-1 ,206- 2, ..,206-x comprised in the sub-group based on a reported measurement result when a measurement according to the configuration is reported.
  • the performing module 406 15 may be implemented by or arranged in communication with the processor 408 of the RNN 208.
  • the RNN 208 may be configured to perform the mobility management on the wireless devices 206-1 ,206-2, ..,206-x comprised in the sub-class based on the reported measurement result, by further being configured to trigger the wireless devices 20 206-1 ,206-2, ..,206-x comprised in the sub-group to perform a handover procedure to a neighbour RNN 210 when one or more criterion for handover to the neighbour RNN 210 are met for a majority of the at least one wireless device 206-1 ,206-2, ..,206-x in each sub-group performing the measurement.
  • the RNN 208 may also comprise means for storing data.
  • the RNN 208 comprises a memory 407 configured to store the data.
  • the data may be processed or non-processed data and/or information relating thereto.
  • the memory 407 may comprise one or more memory units. Further, the memory 407 may be a computer data storage or a semiconductor memory such as a computer memory, a read-only
  • the memory is arranged to be used to store obtained information, data, configurations, schedulings, and applications etc. to perform the methods herein when being executed in the RNN 208.
  • Embodiments herein for performing mobility management in a wireless 35 communications network 200 may be implemented through one or more processors, such as the processor 408 in the arrangement depicted in Figure 4, together with computer program code for performing the functions and/or method actions of
  • the program code mentioned above may also be provided as a computer program product, for instance in the form of a data carrier carrying computer program code for performing the embodiments herein when being loaded into the RNN 208.
  • a data carrier carrying computer program code for performing the embodiments herein when being loaded into the RNN 208.
  • One such carrier may be in the form of an electronic signal, an optical signal, a radio signal or a computer readable storage medium.
  • the computer readable storage medium may be a CD ROM disc or a memory stick.
  • the computer program code may furthermore be provided as program code stored on a server and downloaded to the RNN 208.
  • the input/output interface 400, the receiving module 401 , the transmitting module 402, the dividing module 403, the selecting module 404, the configuring module 405 and the performing module 406 above may refer to a combination of analog and digital circuits, and/or one or more processors configured with software and/or firmware, e.g. stored in the memory 407, that when executed by the one or more processors such as the processors in the RNN 208 perform as described above.
  • processors may be included in a single Application-Specific Integrated Circuitry (ASIC), or several processors and various digital hardware may be distributed among several separate components, whether individually packaged or assembled into a System-on-a-Chip (SoC).
  • ASIC Application-Specific Integrated Circuitry
  • SoC System-on-a-Chip

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

Abstract

L'invention concerne un nœud de réseau radio (RNN) (208) et un procédé à l'intérieur permettant d'effectuer une gestion de mobilité dans un réseau de communication sans fil (200). Le RNN est associé à un groupe (206) de dispositifs sans fil (206-1, 206-2, .., 206-x) ayant des paramètres de mobilité similaires. Le RNN et les dispositifs sans fil fonctionnent dans le réseau de communication sans fil. Le RNN divise les dispositifs sans fil du groupe en au moins deux sous-groupes, où chaque sous-groupe comprend des dispositifs sans fil étant associés à un niveau de service qui est unique pour le sous-groupe respectif. De plus, le RNN configure au moins un dispositif sans fil dans chaque sous-groupe pour qu'il effectue une mesure et communique un résultat de mesure. En outre, le RNN effectue la gestion de mobilité sur les dispositifs sans fil présents dans le sous-groupe en fonction d'un résultat de mesure communiqué lorsqu'une mesure selon la configuration est communiquée.
PCT/EP2016/054386 2016-03-02 2016-03-02 Rapport de transfert intercellulaire et de mesure pour un groupe de terminaux dans un véhicule au niveau d'un sous-groupe WO2017148511A1 (fr)

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WO2013072271A1 (fr) * 2011-11-14 2013-05-23 Nokia Siemens Networks Oy Réalisation d'un équilibrage de charge de mobilité et d'une optimisation de robustesse de mobilité entre des nœuds d'accès pour seulement un sous-ensemble d'équipements d'utilisateurs
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023216043A1 (fr) * 2022-05-09 2023-11-16 Qualcomm Incorporated Identification d'états de mobilité, de conditions ambiantes ou de comportements d'un équipement d'utilisateur sur la base d'un apprentissage automatique et de caractéristiques de canal physique sans fil

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