WO2013116980A1 - An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system - Google Patents
An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system Download PDFInfo
- Publication number
- WO2013116980A1 WO2013116980A1 PCT/CN2012/070911 CN2012070911W WO2013116980A1 WO 2013116980 A1 WO2013116980 A1 WO 2013116980A1 CN 2012070911 W CN2012070911 W CN 2012070911W WO 2013116980 A1 WO2013116980 A1 WO 2013116980A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- station transceiver
- relay station
- tracking area
- interface
- mobile
- Prior art date
Links
- 238000010295 mobile communication Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 45
- 238000004891 communication Methods 0.000 claims description 20
- 230000006854 communication Effects 0.000 claims description 20
- 238000004590 computer program Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 description 16
- 230000006870 function Effects 0.000 description 10
- JZEPSDIWGBJOEH-UHFFFAOYSA-N 4-decylbicyclo[2.2.1]hept-2-ene Chemical compound C1CC2C=CC1(CCCCCCCCCC)C2 JZEPSDIWGBJOEH-UHFFFAOYSA-N 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000941 bile Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007783 downstream signaling Effects 0.000 description 1
- VJYFKVYYMZPMAB-UHFFFAOYSA-N ethoprophos Chemical compound CCCSP(=O)(OCC)SCCC VJYFKVYYMZPMAB-UHFFFAOYSA-N 0.000 description 1
- GVVPGTZRZFNKDS-JXMROGBWSA-N geranyl diphosphate Chemical compound CC(C)=CCC\C(C)=C\CO[P@](O)(=O)OP(O)(O)=O GVVPGTZRZFNKDS-JXMROGBWSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004353 relayed correlation spectroscopy Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/005—Moving wireless networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Definitions
- Embodiments of the present invention relate to an apparatus and a method for a mobile relay station transceiver as well as to a base station for a mobile communication system in general, and more particularly but not exclusively to updating mechanisms for tracking area information in group mobility scenarios.
- a relay station transceiver may extend the coverage of a base station transceiver.
- Basic concepts use a relay station transceiver, which receives signals from a base station transceiver and forwards them to mobile transceivers or user equipment, and vice versa, in an amplify-and-forward fashion.
- the radio signals from the base station transceiver are received, amplified and transmitted to the mobile transceiver, from the relay station transceiver respectively.
- the relay station may not even be identified as such by a mobile transceiver.
- the relay station transceiver may correspond to a base station transceiver, which is connected to another base station transceiver, the so-called donor base station transceiver, via a radio interface and provides radio services as a base station to the mobile transceiver station or user equipment.
- mobile relay stations moving together with the user equipment may be utilized in order to provide a reliable and stable service to the user equipment.
- a high-speed train such as the China Railways High-Speed (CRH) train between Beijing and Shanghai at speeds of up to 350 km/h.
- CCH China Railways High-Speed
- Employing mobile relay station transceivers inside the train may provide for stable operations and multiple services of good quality to the users.
- Embodiments of the present invention are based on the finding that a signaling overhead associated to the update of tracking area information may be further decreased when an apparatus for a mobile relay station transceiver or a mobile relay station transceiver is used having in addition to a donor interface for communicating with a donor base station transceiver a relay interface for communicating with another apparatus for a relay station transceiver, the relay interface being operable to receive tracking area information from the other apparatus for a relay station transceiver. That is, in multi-mobile relay station scenarios, multiple mobile relay stations travelling together, e.g. in a train or a bus or the like, may utilize the relay interface for sharing tracking area information associated to a common tracking area of the relay station transceivers.
- While a mobile relay station transceiver handles the joint traffic of all mobile transceivers, i.e. the user equipment, to the associated donor base station transceiver, the mobile transceivers do not need to individually update their locations to a mobility managing entity, a home subscriber service or a similar entity within the mobile communication network.
- the mobile relay station transceiver employed in a high-speed train moves from one donor base station transceiver to a neighboring donor base station transceiver, the tracking areas belonging to all user equipment associated with the mobile relay station transceiver may change. Shifting the tracking area update from a simultaneous tracking area update of all user equipment associated to a particular mobile relay station trans- DCver to the mobile relay station transceiver may already decrease the associated network load.
- a tracking area update is to be understood as the procedure initiated by any mobile transceiver moving through the network in order to update a central entity, as for example a Mobility Managing Entity (MME) or a Home Subscriber Service (HSS) with the present position of the mobile transceiver such as to allow to page the transceiver in case of an incoming data connection or an incoming call.
- MME Mobility Managing Entity
- HSS Home Subscriber Service
- a mobile relay station transceiver has a coverage area, in which a mobile transceiver can be located.
- the mobile communication system comprises a plurality of base station transceivers and a mobile transceiver.
- the mobile transceiver is associated with the mobile relay station transceiver while being in an idle mode, the idle mode being a state in which data transmission is inactive.
- the first state is a state in which the mobile has no active connections or data sessions with the network.
- the mobile transceiver is still registered with the network, enabling the network to query the mobile transceiver if a call or a data session is requested to be estab- lished with the mobile transceiver.
- a mobility management entity in the network may query the mobile transceiver, the procedure of which is also referred to as "paging".
- the apparatus for a mobile relay station transceiver comprises a donor interface for communicating with a donor base station transceiver in order to request a tracking area update to the donor base station as well as a relay interface for communicating with another relay station transceiver in order to receive tracking area information already previously signaled to the other relay station transceiver. Since the tracking area information provided by the network, a mobility managing entity, a home subscriber server or the like will be identical for both of the mobile relay station transceivers travelling together the information may be shared among both receivers connected together via the relay interface. Thus, the downstream bandwidth to signal the tracking area information more than once to a group of connected mobile relay stations redundantly may be saved.
- Tracking area information signaled downstream from a mobility managing entity of the network to the individual mobile relay station transceivers may, for example, comprise MME identity information uniquely identifying the mobility management entity coordinating the mobility of the transceivers present in the tracking area associated to a particular MME.
- the tracking area information may be related to a group or a unique identification for a group of donor base stations or base stations belonging to the particular tracking area.
- a further possibility of tracking area information may comprise a list of donor base stations belonging to the tracking area or a list of unique IDs assigned to the respective donor base stations.
- the tracking area information may furthermore comprise any other type of information signaling or flag allowing to uniquely identify a particular tracking area within the mobile communication system.
- the tracking area information may also contain a Tracking Area Information list (TAI list) which is, generally speaking, a list of Tracking Areas (TA).
- TAI list Tracking Area Information list
- embodiments of apparatuses for mobile relay station transceivers may help to further decrease the signaling information overhead in the core network in the event of a tracking area change occurring when the associated mobile relay station transceiver transits from one tracking area to a new tracking area not stored in its present TAI list.
- This may be associated with a transit from the coverage of a donor base station transceiver belonging to a first tracking area to a donor base station transceiver belonging to a different or new, second tracking area, which is not contained in the present TAI list of the mobile relay station transceiver.
- the donor interface of an apparatus for a mobile relay station transceiver is further operable to receive tracking area information from the donor base station. That is, an apparatus according to those embodiments may, on the one hand, be implemented in a mobile relay station transceiver receiving the tracking area information from another mobile relay station transceiver or, on the other hand, receive the track- ing area information from the core network or the donor base station via the donor interface such as to be able to distribute the information to other mobile relay station transceivers.
- some embodiments implement relay interfaces which are further operable to transmit tracking area information to other relay station transceivers.
- the submission of the tracking area information from a first to a second mobile relay station transceiver may be performed on a broadcast basis or on an on- demand basis.
- some embodiments implement relay interfaces which are operable to transmit a request for tracking area information. This may serve to save further bandwidth in the inter- relay station transceiver communication by avoiding subsequent broadcasting.
- the relay interface may be a wired or a wireless interface. Utilizing a wireless interface may enable the re-use of already existing wireless transmitters to signal the additional information such as to be able to save additional hardware costs.
- the apparatus for a mobile relay station transceiver discussed in the previous paragraphs is an additional circuitry, apparatus or logic coupled to a conventional mobile relay station, particularly to its wireless interface for communicating with a donor base station (subsequently also called donor eNodeB or DeNB) to provide for the additional functionality.
- a mobile relay station transceiver implements such an apparatus and hence the new functionality in its hardware, software or the like.
- Such an embodiment of a mobile relay station transceiver may comprise an air interface operable to communicate wirelessly with user equipment such as to forward the traffic from the core network or the donor base station to the user equipment associated to the mobile relay station transceiver and vice versa.
- two mobile relay station transceivers forming a communication system travelling together transmit the request for a tracking area update individually, when entering an area covered by a donor base station associated to a new tracking area not contained within their TAI list. That is, the first mobile relay station transceiver submits a request for a tracking area update to the donor base station via its donor interface when entering the same new tracking area and the second mobile relay station transceiver submits a request for a tracking area update to the donor base station when entering into the new tracking area afterwards.
- some embodiments of the invention comprise a base station for a mo- bile communication system comprising a wireless interface operable to communicate as a donor base station with a donor interface of an associated mobile relay station transceiver as well as a network interface for communicating with a mobility managing entity.
- the network interface is operable to submit a request for a tracking area update on behalf of a mobile relay station transceiver upon association with the particular mobile relay station transceiver through the wireless interface.
- Some embodiments comprise a digital control circuit installed within the apparatus for performing the method.
- a digital control circuit e.g. a digital signal processor (DSP)
- DSP digital signal processor
- yet further embodiments also provide a computer program having a program code for performing embodiments of the method, when the computer program is executed on a computer or a digital processor.
- FIG. 1 shows an embodiment of an apparatus for a mobile relay station transceiver
- Fig. 2 shows a communication system comprising a first and a second mobile relay station transceiver
- Fig. 3 shows an example of a flow of control messages exchanged by embodiments of a mobile relay station transceiver
- Fig. 4 shows a flow-chart of a method for updating tracking area information of a mobile relay station transceiver
- Fig. 5 shows an embodiment of a communication system comprising two mobile relay station transceivers and an associated base station;
- Fig. 6 shows an example of a possible flow of control messages exchanged by the system of Fig. 5.
- Fig. 1 shows an embodiment of an apparatus 2 for a mobile relay station transceiver 4 in a mobile communication system.
- the apparatus 2 may be an independent apparatus, hardware or the like which is coupled to a mobile relay station transceiver 4 as indicated in Fig. 1.
- Fig. 1 shows an embodiment of an apparatus 2 for a mobile relay station transceiver 4 in a mobile communication system.
- the apparatus 2 may be an independent apparatus, hardware or the like which is coupled to a mobile relay station transceiver 4 as indicated in Fig. 1.
- Fig. 1 shows an embodiment of an apparatus 2 for a mobile relay station transceiver 4 in a mobile communication system.
- the apparatus 2 may be an independent apparatus, hardware or the like which is coupled to a mobile relay station transceiver 4 as indicated in Fig. 1.
- Fig. 1 shows an embodiment of an apparatus 2 for a mobile relay station transceiver 4 in a mobile communication system.
- the apparatus 2 may be an independent apparatus, hardware or the like which is coupled to a mobile relay station
- the apparatus 1 shows the optional mobile relay station transceiver 4 in dashed lines for illustrative purposes only.
- the apparatus for a mobile relay station transceiver may be integrated into a mobile relay station transceiver, implemented in its software or implemented as an additional hardware within a housing of the mobile relay station transceiver.
- the apparatus 2 comprises a donor interface 6 for communicating with a donor base station transceiver as well as a relay interface 8 for communicating with another relay station transceiver or with a further apparatus for a mobile relay station transceiver.
- the donor interface 6 is operable to submit a request for a tracking area update to the donor base station presently associated to the apparatus. As indicated in Fig.
- the donor inter- face 6 may utilize wireless or wired technologies in order to communicate with the donor base station transceiver.
- the relay interface 8 may communicate using any wired or wireless transportation medium, protocol, or the like.
- the donor interface 6 is operable to submit a request for a tracking area update to the associated donor base station when necessary, i.e. typically when the associated mobile relay station transceiver enters into a new tracking area of the network to which it is not assigned already. This may be determined by the apparatus 2 by comparing a locally stored list of tracking areas, the TAI list, with the new tracking area.
- the relay interface 8 is operable to receive tracking area information from another apparatus for a relay station transceiver coupled to the relay interface 8 such as to avoid unnecessary down-link traffic for signaling purposes.
- the tracking area information may, for example, contain a new or updated Tracking Area Information list (TAI list) which is, generally speaking, a list of Tracking Areas (TA).
- TAI list Tracking Area Information list
- the coupling between the mobile relay station transceiver 4 and the apparatus 2 may be implemented using any known wireless or wired technol- ogy.
- the apparatus 2 may be coupled to a conventional mobile relay station transceiver 4 using the wireless interface which is also used for the communication between the conventional mobile relay station transceiver and a donor base station such as to be able to upgrade existing conventional mobile relay station transceivers with the new functionality by using an apparatus 2 according to an embodiment of the present invention.
- Fig. 2 shows a communication system comprising a first mobile relay station transceiver 10 incorporating an apparatus for a mobile relay station transceiver 2 as well as a second mobile relay station transceiver 12 incorporating an apparatus 14 for a mobile relay station transceiver.
- the apparatus 14 comprises a donor interface 16 and a relay interface 18. The functionality of the donor interfaces and the relay interfaces have already been elaborated on in the preceding paragraphs with respect to the apparatus 2 for the mobile relay station transceiver 4 of Fig. 1.
- the first and second mobile relay station transceivers 10 and 12 are coupled by their respective relay interfaces 8 and 18 such as to be able to communicate with each other.
- the communication system illustrated in Fig. 2 travels together, it will jointly enter into a new tracking area of the mobile communication system, although at slightly different times.
- the first mobile relay station transceiver 10 enters into the new tracking area first.
- the first mobile relay station transceiver 10 submits a request for a tracking area update via its donor interface 6 to a new base station belonging to the new tracking area when necessary, that is when the new tracking area does not belong to its TAI list.
- tracking area information associated to the new tracking area is submitted by the network, i.e. by the MME, the HSS or the new donor base station to the first mobile relay station transceiver 10 which receives the information via the donor in- terface 6.
- the second mobile relay station transceiver 12 When the second mobile relay station transceiver 12 enters the new tracking area shortly after, it submits a request for a tracking area update to the donor base station as well, using its associated donor interface 16. Once also the second mobile relay station trans-titiver 12 has been updated to belong to the new tracking area, the identical new tracking area information does not need be resent downstream since the second mobile relay station transceiver 12 may receive the tracking area information from the first mobile relay station transceiver 10 via the relay interface 18. That is, the first mobile relay station transceiver 10 sends the previously-received tracking area information via its relay interface 8 to the second mobile relay station transceiver 12 receiving the information via its associated relay interface 18.
- the relay interface is operable to transmit tracking area information as well as to receive tracking area information.
- the tracking area information may either be submitted automatically from the first to the second mobile relay station transceiver 10, 12 or the second mobile relay station receiver 12 may request the sending of the information by an associated message.
- the second mobile relay station transceiver 12 may transmit a request for tracking area information via its relay interface 18 to the first mobile relay station transceiver 10.
- the sending of this request may be a triggered by an acknowledgement signal received by the second mobile rely station transceiver 12 via its donor interface 16, wherein the acknowledgement signal indicates a successfully performed tracking area update by the network, e.g. by an MME or an HSS.
- Tracking area information submitted by the network may, for example, be MME identity information or a list of donor base stations (also referred to as TAI list herein) forming the new tracking area or both sets of information altogether.
- the mobile re- lay stations 10 and 12 may, for example, learn about the necessity to initiate a tracking area update by comparing a locally stored list of tracking areas with the new tracking area of the new donor base station. Once the new tracking area is not contained within the list, the mobile relay station transceiver may conclude that a tracking area update shall be initiated by the mobile relay station transceiver.
- any further method may be implemented such as to enable the mobile relay station transceiver to decide whether a tracking area update is required or not.
- Fig. 3 illustrates one possible implementation of a flow of protocol messages between a first and a second mobile relay station transceiver and components of the core network such as to implement an embodiment of the present invention.
- first message flow 20 in order to perform a tracking area update for the first mobile relay station transceiver 10 may correspond to a conventional approach
- second message flow 22 in order to perform a tracking area update for the second mobile relay station transceiver 12 is different, as it will be elaborated on in the following paragraphs.
- the individual messages exchanged within an exemplary network configuration are discussed from top to bottom, i.e. in the timely order of their appearance within the mobile communications network.
- the first mobile relay station transceiver 10 Upon an arbitrary trigger condition to start the Traffic Area Update (TAU) procedure, the first mobile relay station transceiver 10 initiates the TAU procedure by submitting a request for a tracking area update to the new donor base station transceiver 22 to which it has been associated, i,e. which is able to service the moving mobile relay station transceiver 10 at present.
- the tracking area update request is forwarded to the new Mobility Managing Entity (new MME) which is in charge of managing the mobility of all mobile transceivers or user equipment associated to the new donor base station 22.
- new MME Mobility Managing Entity
- the new MME issues a context request to an old MME which was responsible for the mobility management of the first mobile relay station transceiver 10 before its association to the new donor base station 22.
- the old MME forwards context information associated to the first mobile relay station transceiver 10 to the new MME.
- the context information may, for example, be related to the transmission capabilities of the transceiver 10 in terms of bandwidth, previously-used radio bearers or the like. Safe receipt of the context information is acknowledged to the old MME by the new MME.
- the new MME is in receipt of the context information it is prepared to create a bearer request for a Serving GateWay (SGW) and a Packed Data Network (PDN) Gateway (PGW) in order to create a radio bearer for the mobile relay station transceiver 10, that is, to assign radio resources used to transmit payload to the mobile relay station transceiver 10.
- SGW Serving GateWay
- PDN Packed Data Network Gateway
- the new MME may be a key control-node for a Long Term Evolution (LTE) access-network. It is responsible for idle mode UE (User Equipment) tracking and paging procedure including retransmissions. It is involved in the bearer activation/deactivation process and is also responsible for choosing the SGW for a UE at the initial attach and at time of intra-LTE handover.
- the SGW may, for example, route and forward user data packets, and may also act as a mobility anchor for the user plane during inter- eNodeB or DeNB handovers.
- the PDN gateway may provide connectivity from the UE or the mobile relay station transceivers to external packet data networks by being the point of exit and entry of traffic for the UE.
- a HSS may be a central database that contains user-related and subscription- related information.
- the functions of the HSS may include functionalities such as mobility management, call and session establishment support, user authentication and access authorization.
- TAU accept acknowledgement signal
- the tracking area information sent together with the acknowledgement signal includes MME identity information being uniquely identifying the new MME as well as a Tracking Area Information list comprising a list of donor base stations building the new tracking area under control of the new MME.
- the mobile relay station transceiver 10 stores this information in its associated memory and acknowledges the successful update of the TAI list to the new MME thus finishing the procedure of the tracking area update and the associated message flow 20 for the first mobile relay station transceiver 10.
- the second message flow 22 for the tracking area update for the second mobile relay station transceiver 12 corresponds to the first message flow 20. Therefore, a repetition of the individual messages shall, for the ease of understanding, be omitted.
- the message flow starts on occurrence of a trigger condition at the second mobile relay station transceiver 12.
- the message flow differs from the first message flow 20 in that the tracking area update accept message "TAU accept" sent by the new MME comprises only an acknowledgement signal indicating a successful tracking area update by the core network and omits the tracking area information.
- the second mobile relay station transceiver 12 is in receipt of the acknowledgement information it transmits a request for tracking area information to the first relay station transceiver 10 using its relay interface 18.
- the first mobile relay station transceiver 10 submits the MME identity information and the tracking area information list to the second mobile relay station transceiver 12 via the relay interface 8 such as to save signaling bandwidth downstream from the MME to the second mobile relay station transceiver 12.
- Fig. 4 shows a block diagram illustrating a method for updating tracking area information of a mobile relay station transceiver according to an embodiment of the present invention
- a request for a tracking area update is submitted to a donor base station via a donor interface
- tracking area information is received from another relay station transceiver via a relay interface.
- Fig. 5 illustrates an embodiment of a communication system of Fig. 2 within a means for mass transportation 28, e.g. within a high-speed train illustrated schematically in Fig. 5.
- the communication system illustrated in Fig. 5 further comprises a donor base station 30 capable of serving as a donor base station for the first and second mobile relay station transceivers 10 and 12.
- the donor base station 30 comprises a wireless interface 34 operable to communicate, as a donor base station, with the donor interfaces of the mobile relay stations 10 and 12 as well as a network interface for communicating with a mobility managing entity 38 in a core network, which is also shown for illustrative purposes only.
- the network interface 36 of the base station 30 is operable to submit the request for a tracking area update on behalf of the second mobile relay station transceiver 12 upon association of the second mobile relay station transceiver with the donor base station 30. That is, after the first mobile relay station transceiver 10 has already performed a tracking area update as elaborated in Figs. 1 to 3, the donor base station 30 initiates the tracking area update for the second mobile relay station transceiver 12 once it is associated to the donor base station 30.
- Association can, according to one embodiment, mean the successful performing of a handover from the previous donor base station 32 to the donor base station 30.
- the transition of the second mobile relay station 12 from the previous base station 32 to the base station 30 need not necessarily be performed in a (RRC -) connected state, that is, in a state where payload data is exchanged between the second mobile relay station transceiver 12 and any of the donor base stations 30 or 32.
- Association is therefore understood to be any way of establishing a connection between a mobile relay station transceiver or a User Equipment (UE) and a base station which principally enables the mobile relay station transceiver or the user equipment to exchange data via the associated base station.
- UE User Equipment
- Fig. 6 illustrates a message flow of a possible implementation of the tracking area update procedure illustrated in Fig. 5. While the first message flow 20 for the tracking area update procedure of the first mobile relay station transceiver 10 is identical to the one discussed with respect to Fig. 3, a third message flow 40 associated to the update procedure of the second mobile relay station transceiver 12 differs. Therefore, only the differences with respect to the first message flow 20 shall be discussed shortly in the following para- graph. The difference with respect to the previously-discussed embodiments is that a tracking area update request for the second mobile relay station transceiver 12 is initiated and sent by the new donor base station 30 on behalf of the second mobile relay station transceiver 12 in order to save the required uplink bandwidth. Although it is indicated in Fig.
- any other trigger condition may be implemented in further embodiments. That is, mobile relay base station transceivers 10 and 12 implementing the concept discussed herein do not necessarily have to be permanently in a connected state with the new donor base station 30, that is in a state allowing to transfer payload data.
- TAU for mobile relay scenario
- One option is to let the MR and the UEs camped on this MR configure a list of TAs that does not require them to give any TAU, as long as the MR passes the pre-configured TAI list.
- the travelling route of the high speed train is long, for example the route from Beijing to Shanghai is about 1400km, it is impossible to require the MMEs to do paging message for a UE to all the DeNB along the route.
- Another more advanced way is to let the UEs camping on the MR keep a static TAI list, and the MR is configured normally a short list of TAI. When the MR detects a new TA that is not in its TAI list, it performs the TAU procedure.
- a TAU method which can be adopted into the high speed train with multiple mobile relays scenario may be based on the following aspects. 1.
- the basic idea is to let the UEs served by the MR keep a static TAI list controlled by the MR. When UEs move from one carriage to another, they will not perform any TAU. When the train crosses TA then only the MR performs TAU procedure. 2.
- the scenario that there is more than one mobile relay employed on the high speed train is considered.
- Each MR has a limited coverage area, and serves a group of UEs in its coverage area. When the train is travelling along the trajectory, once MR detects it has entered in a new TA that is not in its stored TAI list, the MR will trigger to start a TAU procedure.
- the basic idea of cooperative TAU procedure is to let multiple MRs on the train share the TAI list information. Once the first MR on the train enters in the TA controlled by a new MME, it will request to do TAU with the new MME. Since the train is always moving in one direction, for example from Beijing to Shanghai, the other MRs will always enter in the same TA in sequence. Therefore the new MME identify and new TAI list can be shared among MRs on the same train. The TAU complete signal to the MRs (apart from the first MR) does not need to include the new MME identity and new TAI list. This information is updated among MRs via reliable communication link. By doing this, the signaling cost and failure rate are reduced.
- L3 relay can perform group mobility for UEs.
- the basic idea is to let the UEs keep a static TAI list containing all the MR cells.
- MR's perform TAU in coordination.
- each MR needs to update its TAI list.
- the TAU procedure can be cooperatively performed among the MRs.
- a cooperative TAU procedure may enable this coordination.
- MR will perform TAU procedure.
- the first MR sends the TAU request to the new MME, together with RRC parameters indicating the old MME identity (may also include its serving UE ID).
- the new MME retrieves context information about the first MR from the old MME previously serving the MR. It then sends request to MR SGW and PDN gateway (PGW) to create bearer. After the bearer has been created and location information has been updated successfully, the new MME sends TAU accept to the MR, including an identify associated with the new MME. The first MR will update with the new identity, and send complete signal to the new MME.
- PGW PDN gateway
- the second MR on the high speed train When the second MR on the high speed train enters in the TA of the new MME, it will trigger to start the TAU.
- the second MR sends the TAU request to the new MME, together with RRC parameters indicating the old MME identity (may also include its serving UE ID).
- the new MME retrieves context information of the second MR from the old MME previously serving the MR. Then it will send a create bearer request to MR SGW and PGW. Once the bearer with the new MME has been created, and location has been updated, the new MME sends TAU accept to the second MR.
- This signaling process differs from the conventional process, as it does not include any MME identity or TAI list.
- the second MR will send request to the first MR, because the first MR stores the new MME identify and new TAI list. After the second MR successfully updates with the new TAI list, it will send a TAU complete signal to the new MME. If there are more MRs, i.e. the third MR or the fourth MR, their TAU procedures follow the same process with the second MR. By moving the transmission of the MME identify and TAI list information from the access link between MME and MR, to the reliable communication channel between MRs, the message delivery success rate is increased.
- the benefits of adopting the proposed tracking area update for mobile relays in high speed train scenario may be the following.
- 3 GPP LTE conventional TAU procedure once a high speed train moves to a tracking area covered by a new MME, each UE performs TAU. This is very likely to cause a burst of update signaling, and thus raise instability to the system.
- the new MME identity and TAI list can be shared among MRs. Assuming reliable communication link is available between MRs, the TAI list is requested and transmitted between the MRs instead of via the wireless access link between the MME and the MR. In this case, the signaling cost is reduced, and the failure rate of this transmission is reduced correspondingly.
- the above provides a feasible methodology to perform group mobility by multiple mobile relays.
- our innovative TAU procedure can alleviate the burst of update signal, and reduce the signaling cost and latency compared with conventional TAU procedure, and therefore efficiently improves the UE quality of service.
- MME relocation occurs along with each MR performing handover procedure with the DeNB, so that the MR needs to obtain the new MME identity and most likely a new TA list.
- the basic idea of a cooperative TAU procedure is to let multiple MRs on the train share the TAI list information.
- the first MR on the train Once the first MR on the train enters in the TA of a new MME, it will request to do TAU with the new MME. Since the train is always moving in one direction, for example from Beijing to Shanghai, the other MRs will always enter in the same TA in sequence. Therefore the first MR is able to notify the newly updated TAI list to other MRs on the same train.
- the TAU request may then be initiated by the target DeNB once its finishes the handover procedure for the second MR, In this case, the signaling cost and delay of TAU request which is initiated by MR is eliminated
- Functional blocks denoted as "means for " shall be understood as functional blocks comprising circuitry that is adapted for performing a certain function, respectively.
- a "means for s.th.” may as well be understood as a “means being adapted or suited for s.th.”.
- a means being adapted for performing a cer- tain function does, hence, not imply that such means necessarily is performing said function (at a given time instant).
- any functional blocks may be provided through the use of dedicated hardware, as e.g. a processor, as well as hardware capable of executing software in association with appropriate software.
- the functions may be provided by a single dedicated processor, by a single shared processor, or by a plurality of individual processors, some of which may be shared.
- processor or “controller” should not be con- strued to refer exclusively to hardware capable of executing software, and may implicitly include, without limitation, digital signal processor (DSP) hardware, network processor, application specific integrated circuit (ASIC), field programmable gate array (FPGA), read only memory (ROM) for storing software, random access memory (RAM), and nonvolatile storage.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- ROM read only memory
- RAM random access memory
- nonvolatile storage Other hardware, conventional and/or custom, may also be included.
- any block diagrams herein represent conceptual views of illustrative circuitry embodying the principles of the invention.
- any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.
- each claim may stand on its own as a separate embodiment. While each claim may stand on its own as a separate embodiment, it is to be noted that - although a dependent claim may refer in the claims to a specific combination with one or more other claims - other embodiments may also include a combination of the dependent claim with the subject matter of each other dependent claim. Such combinations are proposed herein unless it is stated that a specific combination is not intended. Furthermore, it is intended to in- elude also features of a claim to any other independent claim even if this claim is not directly made dependent to the independent claim. It is further to be noted that methods disclosed in the specification or in the claims may be implemented by a device having means for performing each of the respective steps of these methods.
- a single step may include or may be broken into multi- pie sub steps. Such sub steps may be included and part of the disclosure of this single step unless explicitly excluded.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2012/070911 WO2013116980A1 (en) | 2012-02-06 | 2012-02-06 | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
JP2014555912A JP2015510346A (en) | 2012-02-06 | 2012-02-06 | Apparatus and method for mobile relay transceiver and base station for mobile communication system |
US14/376,940 US9344900B2 (en) | 2012-02-06 | 2012-02-06 | Apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
KR1020147024818A KR20140123570A (en) | 2012-02-06 | 2012-02-06 | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
EP12867837.2A EP2826297B1 (en) | 2012-02-06 | 2012-02-06 | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
BR112014019042-9A BR112014019042B1 (en) | 2012-02-06 | 2012-02-06 | APPARATUS FOR A MOBILE RELAY STATION TRANSCEIVER IN A MOBILE COMMUNICATION SYSTEM, MOBILE RELAY STATION TRANSCEIVER FOR A MOBILE COMMUNICATION SYSTEM, COMMUNICATION SYSTEM, MASS TRANSPORTATION MEDIA, BASE STATION FOR A MOBILE COMMUNICATION SYSTEM, AND METHOD TO UPDATE TRACKING AREA INFORMATION FROM A MOBILE RELAY STATION TRANSCEIVER IN A MOBILE COMMUNICATION SYSTEM |
ES12867837T ES2797552T3 (en) | 2012-02-06 | 2012-02-06 | An apparatus and a method for a mobile repeater station transceiver and a base station for a mobile communication system |
CN201280069055.7A CN104106286B (en) | 2012-02-06 | 2012-02-06 | Mobile relay station transceiver, the device and method for it, base station and communication system |
TW102101637A TWI492562B (en) | 2012-02-06 | 2013-01-16 | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2012/070911 WO2013116980A1 (en) | 2012-02-06 | 2012-02-06 | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013116980A1 true WO2013116980A1 (en) | 2013-08-15 |
Family
ID=48946881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2012/070911 WO2013116980A1 (en) | 2012-02-06 | 2012-02-06 | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system |
Country Status (9)
Country | Link |
---|---|
US (1) | US9344900B2 (en) |
EP (1) | EP2826297B1 (en) |
JP (1) | JP2015510346A (en) |
KR (1) | KR20140123570A (en) |
CN (1) | CN104106286B (en) |
BR (1) | BR112014019042B1 (en) |
ES (1) | ES2797552T3 (en) |
TW (1) | TWI492562B (en) |
WO (1) | WO2013116980A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9986535B2 (en) * | 2012-03-31 | 2018-05-29 | Tejas Networks Limited | Method and system for managing mobile management entity (MME) in a telecommunication network |
US9474037B2 (en) * | 2012-10-29 | 2016-10-18 | Empire Technology Development Llc | Mobility management for LTE network for high-speed railway |
US9137768B1 (en) * | 2013-09-30 | 2015-09-15 | Sprint Spectrum L.P. | Dynamically controlling overlay of tracking areas upon small cell initiation |
US10637834B2 (en) * | 2015-07-12 | 2020-04-28 | Qualcomm Incorporated | Network architecture and security with simplified mobility procedure |
US10470108B2 (en) | 2015-08-13 | 2019-11-05 | Lg Electronics Inc. | Signal transmission and reception method by remote UE in a wireless communication system and device for same |
WO2017052335A1 (en) * | 2015-09-25 | 2017-03-30 | 엘지전자 주식회사 | Method for performing device-to-device direct communication in wireless communication system and device therefor |
US10560915B2 (en) | 2016-05-02 | 2020-02-11 | Lg Electronics Inc. | Method for performing location registration by remote UE in wireless communication system, and apparatus therefor |
WO2018044144A1 (en) * | 2016-09-05 | 2018-03-08 | 엘지전자(주) | Method for performing service request procedure in wireless communication system and device therefor |
US10477608B2 (en) * | 2016-09-29 | 2019-11-12 | Futurewei Technologies, Inc. | System and method for network access using a relay |
US9888455B1 (en) * | 2016-12-06 | 2018-02-06 | Cisco Technology, Inc. | Slice-based tracking areas |
EP3857998A1 (en) * | 2018-09-27 | 2021-08-04 | FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V. | Location management with dynamic tal for high mobility |
US11546047B2 (en) * | 2019-12-18 | 2023-01-03 | Qualcomm Incorporated | Coverage expansion and interference operating modes for a repeater |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101883433A (en) * | 2009-05-05 | 2010-11-10 | 大唐移动通信设备有限公司 | Neighboring cell notification method for subframe configuration information, relay node and base station |
CN102111806A (en) * | 2011-02-14 | 2011-06-29 | 电信科学技术研究院 | Method, system and equipment of selecting target cell |
CN102118808A (en) * | 2011-03-03 | 2011-07-06 | 电信科学技术研究院 | Method for triggering switching and transferring identification information of mobile management entity pool and equipment |
WO2011110229A1 (en) | 2010-03-12 | 2011-09-15 | Nokia Siemens Networks Oy | Relaying in a communication system |
CN102244935A (en) * | 2010-05-11 | 2011-11-16 | 北京三星通信技术研究有限公司 | Method for establishing communication relationship |
WO2011142628A2 (en) * | 2010-05-14 | 2011-11-17 | Lg Electronics Inc. | The method and apparatus for performing handover procedure in wireless communication system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4541984B2 (en) * | 2005-07-04 | 2010-09-08 | 三菱電機株式会社 | Terminal mobility management system |
JP5132372B2 (en) * | 2008-03-17 | 2013-01-30 | 三菱電機株式会社 | Mobile communication system |
CN101686455B (en) * | 2008-09-27 | 2012-12-12 | 华为技术有限公司 | Mobile management method, related device and communication system |
EP2712215B1 (en) * | 2009-04-28 | 2017-09-06 | Huawei Technologies Co., Ltd. | Paging method, location update method and device |
US8059586B2 (en) | 2009-06-04 | 2011-11-15 | Motorola Mobility, Inc. | Mobility management entity tracking for group mobility in wireless communication network |
US20120238208A1 (en) * | 2011-03-17 | 2012-09-20 | Maik Bienas | Mobile radio communication devices and servers |
-
2012
- 2012-02-06 ES ES12867837T patent/ES2797552T3/en active Active
- 2012-02-06 JP JP2014555912A patent/JP2015510346A/en active Pending
- 2012-02-06 KR KR1020147024818A patent/KR20140123570A/en not_active Application Discontinuation
- 2012-02-06 US US14/376,940 patent/US9344900B2/en active Active
- 2012-02-06 CN CN201280069055.7A patent/CN104106286B/en active Active
- 2012-02-06 BR BR112014019042-9A patent/BR112014019042B1/en active IP Right Grant
- 2012-02-06 WO PCT/CN2012/070911 patent/WO2013116980A1/en active Application Filing
- 2012-02-06 EP EP12867837.2A patent/EP2826297B1/en active Active
-
2013
- 2013-01-16 TW TW102101637A patent/TWI492562B/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101883433A (en) * | 2009-05-05 | 2010-11-10 | 大唐移动通信设备有限公司 | Neighboring cell notification method for subframe configuration information, relay node and base station |
WO2011110229A1 (en) | 2010-03-12 | 2011-09-15 | Nokia Siemens Networks Oy | Relaying in a communication system |
CN102244935A (en) * | 2010-05-11 | 2011-11-16 | 北京三星通信技术研究有限公司 | Method for establishing communication relationship |
WO2011142628A2 (en) * | 2010-05-14 | 2011-11-17 | Lg Electronics Inc. | The method and apparatus for performing handover procedure in wireless communication system |
CN102111806A (en) * | 2011-02-14 | 2011-06-29 | 电信科学技术研究院 | Method, system and equipment of selecting target cell |
CN102118808A (en) * | 2011-03-03 | 2011-07-06 | 电信科学技术研究院 | Method for triggering switching and transferring identification information of mobile management entity pool and equipment |
Also Published As
Publication number | Publication date |
---|---|
BR112014019042A2 (en) | 2017-06-20 |
EP2826297A1 (en) | 2015-01-21 |
EP2826297A4 (en) | 2015-12-02 |
US9344900B2 (en) | 2016-05-17 |
EP2826297B1 (en) | 2020-05-13 |
ES2797552T3 (en) | 2020-12-02 |
TWI492562B (en) | 2015-07-11 |
TW201345190A (en) | 2013-11-01 |
US20140349570A1 (en) | 2014-11-27 |
KR20140123570A (en) | 2014-10-22 |
CN104106286A (en) | 2014-10-15 |
BR112014019042B1 (en) | 2022-08-09 |
JP2015510346A (en) | 2015-04-02 |
BR112014019042A8 (en) | 2017-07-11 |
CN104106286B (en) | 2018-10-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2826297B1 (en) | An apparatus and a method for a mobile relay station transceiver and a base station for a mobile communication system | |
US10492116B2 (en) | Traffic offload via local network | |
US20240063898A1 (en) | Selecting a Non-Access Stratum Period Based on a Non-Terrestrial Access Network Type | |
US10356665B2 (en) | Source base station gateway (GW) for releasing resources associated with a mobile device | |
US11477633B2 (en) | Method and apparatus for managing packet data network connection on basis of local area in wireless communication system | |
US20190327659A1 (en) | Handover using dual active connections | |
WO2008095936A9 (en) | Method and system for handling wireless mobile communication | |
EP2391166B1 (en) | Methods, system, and apparatus for interconnecting different wireless communication networks | |
CN105517073B (en) | LTE group-network construction and core net cross-line hand off signaling and data communications method | |
US11483744B2 (en) | Methods and computing device for splitting traffic across multiple accesses | |
KR101429167B1 (en) | Apparatus and method for paging in wireless communication system | |
WO2023097660A1 (en) | Method and apparatus of unicast establishment | |
US20230292200A1 (en) | Method and apparatus for multicast and broadcast services |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12867837 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012867837 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2014555912 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14376940 Country of ref document: US |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112014019042 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 20147024818 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 112014019042 Country of ref document: BR Kind code of ref document: A2 Effective date: 20140731 |