WO2017102030A1 - Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures - Google Patents
Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures Download PDFInfo
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- WO2017102030A1 WO2017102030A1 PCT/EP2015/080560 EP2015080560W WO2017102030A1 WO 2017102030 A1 WO2017102030 A1 WO 2017102030A1 EP 2015080560 W EP2015080560 W EP 2015080560W WO 2017102030 A1 WO2017102030 A1 WO 2017102030A1
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- 238000000034 method Methods 0.000 title claims abstract description 90
- 238000004590 computer program Methods 0.000 title claims abstract description 10
- 238000013475 authorization Methods 0.000 claims abstract description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
- H04W12/062—Pre-authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/25—Maintenance of established connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/08—Upper layer protocols
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- 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
- H04W16/14—Spectrum sharing arrangements between different networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/17—Selecting a data network PoA [Point of Attachment]
Definitions
- the present invention generally relates to wireless communication networks, and more specifically relates to a method, apparatus and computer program product for improved accessing a local area scoped network having non-access-stratum procedures, in particular a network according to the MuLTEfire technology.
- LTETM Long Term Evolution
- LTE-AdvancedTM uses the Evolved Universal Terrestrial Radio Access Network E-UTRAN as radio communication architecture according to 3GPP specification.
- MF MuLTEfire
- LAA Licensed Assisted Access
- LTE-U Licensed Assisted Access
- MF is a standalone system designed to operate on unlicensed band frequencies.
- MF can operate e.g. on the same 5 GHz band as WLAN does.
- Other unlicensed frequencies are available or may become available at around 3.5 GHz, at 7 GHz, at 60 GHz and/or in several high frequency bands above 6 GHz. Further unlicensed spectrum slices may be appear in low frequencies below 1 GHz.
- MF technology is also subject of the 'MulteFire Alliance'.
- ANQP Access Network Query Protocol
- IEEE802.1 1 u a query protocol
- This information obtained beforehand is crucial for the UE to decide, which network to connect to. It is typical that in dense area a large number of overlapping networks are available and a large number of Access Points to connect to, can be found. It is important to know beforehand, which Access Points belong to which networks and which services each of the networks provide.
- ANQP is e.g. in use for this purpose in the set of Hotspot (Passpoint) protocols.
- LTE networks can let UE provide an emergency indication during initial attach request and in that case a network may provide access to the limited emergency services without authentication.
- LTE environment in general there is no need and hence there is no solution that enables a UE to retrieve network access related information or network service information before attaching/authenticating to it.
- a user equipment for accessing a local area scoped network having non-access-stratum procedures which may be performed by a user equipment, comprising identifying an available access point of the local area scoped network having non-access-stratum procedures, transmitting a message to the access point, indicating a request for retrieving network information, wherein the information is queried from the network before authentication/authorization and actually connecting to the network, selecting a service provider of the network based on received network information for binding the network identity to the selected service provider for accessing, and further conveying a Non- Access Stratum service request to the network to cause authentication of the user equipment for connecting to the network.
- a method for enabling access of a user equipment to a local area scoped network having non-access- stratum procedures comprising receiving a message from the user equipment, indicating a request for retrieving network information, wherein the information is queried from the network before actually connecting to the network, accepting the request without authentication and transmitting network access information to the user equipment, upon receiving information about a selection of a service provider by the user equipment, binding the network identity to the selected service provider for accessing, and upon receiving a Non-Access Stratum service request from t e user equipment, allowing authentication of the user equipment for connecting to the network.
- an apparatus including a function for a user equipment for accessing a local area scoped network having non-access-stratum procedures, comprising at least one processor, and at least one memory for storing instructions to be executed by the processor, wherein the at least one memory and the instructions are configured to, with the at least one processor, cause the apparatus at least to perform identifying an available access point of the local area scoped network having non-access-stratum procedures, transmitting an associate request message to the access point, indicating a request for retrieving network information, wherein the information is queried from the network before authorization and actually connecting to the network, selecting a service provider of the network based on received network information for authorizing binding the network identity to the selected service provider for accessing, and further conveying a Non-Access Stratum service request to the network to cause authentication of the user equipment for connecting to the network.
- an apparatus including a function for enabling access of a user equipment to a local area scoped network having non-access-stratum procedures, comprising at least one processor, and at least one memory for storing instructions to be executed by the processor, wherein the at least one memory and the instructions are configured to, with the at least one processor, cause the apparatus at least to perform receiving an associate request message from the user equipment, indicating a request for retrieving network information, wherein the information is queried from the network before actually connecting to the network, accepting the associate request without authentication and transmitting network access information to the user equipment, upon receiving information about a selection of a service provider by the user equipment, binding the network identity to the selected service provider for accessing, and upon receiving a Non-Access Stratum service request from the user equipment, allowing authentication of the user equipment for connecting to the network.
- a computer program product comprising computer-executable components which, when the program is run, are configured to carry out the
- the local area scoped network having non-access-stratum procedures is a network according to the MuLTEfire technology.
- the network information comprise at least one of access information, information of at least one service provider of the network, and other information, such as network metrics, in a MF network. That is, it is possible to query further information than service provider information, such as the network metrics in a MF network.
- the network information is exchanged with the network in at least one of Non-Access Stratum signaling and Radio Resource Control signaling messages.
- the network metrics may comprise information about at least one of capabilities and performance metrics of the network
- the metrics comprise at least one of a Physical Resource Block load, indicated for example by a percentage of Physical Resource Blocks used per sub-frame averaged over a large number of sub- frames, a Physical Resource Block peak to average ratio, indicated by the ratio of the short term peak number of Physical Resource Blocks occupied divided by the long term average Physical Resource Block usage, an average Packet Data Convergence Protocol Service Data Unit delay between the access point and the user equipment, and a Channel Quality Indicator load averaged over a specific time, indicative of the interference load in the network.
- the used bandwidth allocations due carrier aggregation impact on the percentage of PRB load i.e. if getting one component carrier for allocations, the PRB load can be higher compared to allocating on multiple component carriers. Bandwidth and/or carrier use indication can be included to a load metric too.
- Load can indicate free airtime percentage as free/busy time ratios over a measurement period. Listen-Before-Talk procedures, contention based access principles and collision probabilities have an impact to these measures. As said, frequency use has a large impact. There can be an opportunity for a frequency reuse 1 operation between MF-APs in the same network so that some MF-APs of the same network can simultaneously operate on the same frequency without mutual channel competition, while they compete for free channels only relative to the other 'alien' MF-APs or other transmitters, like WLANs. Therefore, channel competition can impact the other metrics like the PRB load.
- no bearer establishment is allowed while the user equipment is associated (but not yet ATTACHED) to the network in a limited manner during the query procedure.
- a temporary Cell Radio Network Temporary Identifier (C-RNTI) is used for signaling the allocations of radio resources needed for the query procedure.
- the C-RNTI is validated into the communication use after authentication and interface (bearer) setup.
- an example mechanism to identify the service provider is binding the network identity to the Fully Qualified Domain Name FQDN of the selected service provider for accessing, wherein any format may be used as long as the participating entities mutually understand it or are able compare and detect matching identity.
- Fig. 1 illustrates a method performed in a user equipment, such as any 3GPP device category including smart phones, laptops, wearables, communicators, pads, machines and internet of things, according to certain embodiments of the invention
- Fig. 2 illustrates a method performed in a network element of a local area scoped network having non-access-stratum procedures, in particular a network according to the MuLTEfire MF technology.
- Fig. 3 depicts a general structure of an apparatus comprised in a user equipment, including a function for accessing the user equipment to a local area scoped network having non-access-stratum procedures (e.g. MF network);
- MF network non-access-stratum procedures
- Fig. 4 depicts a block diagram of an apparatus comprised in a network element, including a function for enabling access of a user equipment to a local area scoped network having non-access-stratum procedures (e.g. MF network);
- Fig. 5 schematically shows a protocol stack according to certain embodiments of the invention.
- Fig. 6 is an example of Non-Access Stratum NAS procedures with query in a MF network.
- Figs. 7a and 7b schematically show state diagrams of a user equipment in a MF network, wherein a combination of 3GPP states and MF states are shown in Fig 7a, and standalone MF states are shown in Fig 7b.
- a wireless communication network comprises plural network elements, such as evolved NodeB's (eNB; i.e. base station in LTE/LTE-A environment), user equipments UE (e.g. mobile phone, smart phone, Computer, etc.), controllers, interfaces, etc, and in particular any equipment used in the provision of a communications service.
- eNB evolved NodeB's
- UE user equipment
- controllers interfaces, etc, and in particular any equipment used in the provision of a communications service.
- the present invention provides an improved network selection for local area scoped network having non-access-stratum procedures, in particular (but not restricted to) MuLTEfire systems.
- MF relies on LTE technology. While operation on unlicensed spectrum requires changes to the LTE technology, the design goal is to have as few modifications as possible.
- the LTE radio physical layer and related protocols are being modified for the unlicensed spectrum operation including Listen-Before-Talk (LBT) mechanisms for a fair channel access between systems.
- LBT Listen-Before-Talk
- the currently defined LTE unlicensed access relies on control information and signaling exchanged on the licensed carrier.
- the licensed carrier acts as Primary carrier or Primary cell (PCell), whereas the unlicensed carrier acts as Secondary Carrier or Secondary cell (Scell).
- PCell Primary carrier
- Scell Secondary Carrier
- MF is expected to operate entirely on the unlicensed carriers. If MF has Primary and Secondary carriers or Primary and Secondary Cells, they are all on unlicensed spectrum. In MF, it is possible to change a Primary carrier to another carrier, or the Secondary carrier to another carrier or inter-change a Primary carrier to Secondary and vice versa.
- the radio interface terminates in the UE and in the MF Access Point on the network side.
- the MF Access Point is also referred to as MF-AP.
- MF-AP can be connected to a conventional core network, i.e. Evolved Packet Core (EPC).
- EPC Evolved Packet Core
- MF-AP can be connected to a MF core network (MF CN), which realizes the minimum set of necessary core network functions for t e MF operations, in a local network domain.
- MF CN is intended to be as simple as possible, the target is to be able to realize MF core network in one physical network equipment (SW/HW).
- SW/HW physical network equipment
- MF core network can be realized as a virtualized implementation allowing cloud implementation.
- SW/HW physical network equipment
- MF core network can be realized as a virtualized implementation allowing cloud implementation.
- the network setup may resemble WLAN deployment, however operating with 3GPP protocols.
- MF networks need to be identified uniquely in order the UE to select which network to connect to and which service provider to select. This has importance both in the initial network access and during mobility procedures like handover with or without crossing network boundaries.
- 3GPP networks are identified with Public Land Mobile Network (PLMN) identities that in practice identify the (licensee) operator of the network.
- PLMN Public Land Mobile Network
- MF is not limited to the LTE mode only; it has also local service provisioning, independent of PLMNs, here referred to as the local MF mode. This way, MF provides an opportunity for access operators and service providers (like Internet Service Providers, ISP), who do not have cellular licenses and who do not operate PLMNs, neither have registered/licensed PLMNI Ds.
- ISP Internet Service Providers
- a single MF network can be connected to multiple operators having PLMNI D or alternatively to Internet Service Providers.
- a Service Provider in this context is any "operator" who can perform the authentication (and charging) of a user to the network. This has some similarity to how the Service Providers may use WLAN access in hotspots.
- NAS non-access-stratum
- a user equipment UE should learn the available Service Providers and should know whether the preferred Service Provider is available before it attaches to the network. The UE needs to indicate to the MF network which Service Provider it would like to use for authentication. Service Provider selection also defines used CN network and it is the CN which initiates authentication.
- the problem is that the number of Service Providers offering connectivity from a single access network can be high and their identities can be long.
- the Service Providers of MF cannot be expected to be cellular network operators having a PLMNID. Rather, the Service Providers, in general, are identified by their Fully Qualified Domain Names (FQDN).
- FQDN Fully Qualified Domain Names
- to advertise the full identifiers of all the available Service Providers in broadcast messages is not a feasible solution. Advertising short format of the identifiers of the Service Providers might be possible, but the short format of the identifiers is not understandable for the end-users and hence manual selection is not convenient enough.
- Assigning short formats for FQDNs the formats of which would be unique, may be challenging. In particular, if automatically generating short formats, their uniqueness may not easily be guaranteed.
- the cellular network user identification used for registration (customer info) is needed in addition to getting the IP address for networking.
- custom info is needed in addition to getting the IP address for networking.
- the message indicating a request for retrieving network information may, as a non-limiting example, also be referred to as an 'associate request' message.
- This exemplary terminology expresses the purpose of e.g. associating a UE to a (MF-) network for connecting to the network.
- signaling procedures to access a MF network by the MF:NAS_Service_Request message according to the 3GPP Non-Access Stratum NAS protocols are disclosed.
- the set of procedures include MF:NAS_Query, which can be used to query information from the MF network before actually connecting to the MF network and before executing the network ATTACH. These procedures are needed to avoid the accessing UE to attempt switching from the idle state to the connected state to a MF network, where no suitable PLMN or Service Provider would be available.
- the MF:NAS_Query is used by the UE to obtain network metrics from the MF network before the ATTACH attempt, to evaluate, whether the MF network is capable of well serving the UE in terms of expected network load and offered quality.
- the solution according to an aspect of the invention basically comprises the following steps.
- the UE sends a MF:Associate_Request with a new request type, which indicates that UE retrieves access information (e.g. names of available access network providers or Service Providers ), before the actual MF:NAS_Service_Request will be executed.
- the network may accept the MF:Associate_Request without authentication for exchanging a limited and defined set of network Query Information elements.
- the information can be exchanged un-ciphered.
- the network in this phase allows the UE to send only a limited set of special type of messages or Information elements in a message for the Query, and the network hence delivers the requested information.
- the requested information provided by the network may be an exact response to the query of the UE, or the network may append the information to a suitable length.
- the network may also include optional information elements to its query response.
- the UE may decide to attempt network access and will transmit the actual MF:NAS_Service_Request in the NAS message, which also terminates the Query.
- the NAS termination point in the network (MME similar to the legacy LTE networks, mini-EPC in MF, or MF CN) can send replies to these requests in the NAS messages or initiate other dedicated signaling with the UE.
- the UE and the network should terminate the session after a short time of query.
- No bearer (“eps-bearer”) establishment is allowed while the UE is associated (but not yet ATTACHED) to the network in this limited manner.
- the UE changes to the ATTACHED state.
- the NAS service request can include an identity of a UE or a user in terms given by the Service Provider.
- identity can have a form of a bit field, a uniform resource name (urn), a temporary subscriber identity, any service provider given user identity, e.g. a number, or an identity that is valid in a given MF network.
- Fig. 1 illustrates a method for accessing a user equipment to a local area scoped network having non-access-stratum procedures (e.g. MF network) performed in a user equipment according to certain embodiments of the invention.
- Step S1 1 an available access point of the local area scoped network having non- access-stratum procedures is identified.
- Step S12 a message, such as e.g. an associate request message MF:Associate_Request, is transmitted to the access point, indicating a request for retrieving network information (e.g. comprising at least one of information of at least one service provider of the network, network metrics and any access information), wherein the information is queried from the network before authenticating and actually connecting to the network.
- network information e.g. comprising at least one of information of at least one service provider of the network, network metrics and any access information
- a service provider of the network is selected based on received network information for binding the network identity to (e.g. the Fully Qualified Domain Name) the selected service provider for accessing.
- Step 14 a Non-Access Stratum service request MF:NAS_Service_Request is conveyed to the network to cause authentication of the user equipment for connecting to the network.
- Fig. 2 illustrates a method for enabling access of a user equipment to a local area scoped network having non-access-stratum procedures (e.g. MF network) performed in a network element (e.g. of a MF network) according to certain embodiments of the invention.
- MF network non-access-stratum procedures
- Step S21 a message, such as an associate request message MF:Associate_Request, is received from the user equipment, indicating a request for retrieving network information, information (e.g. comprising at least one of information of at least one service provider of the network, network metrics and any access information), wherein the information is queried from the network before actually connecting to the network.
- t e (associate) request is accepted without authentication and transmitting network access information to the user equipment.
- Step S23 upon receiving information about a selection of a service provider by the user equipment, the network identity is bound to the (e.g. Fully Qualified Domain Name of) the selected service provider for accessing.
- Step 24 upon receiving a Non-Access Stratum service request, MF:NAS_Service_Request from the user equipment, authentication of the user equipment for connecting to the network is allowed.
- a diagram illustrating a configuration of an element comprised in a user equipment implementing a function for accessing a user equipment to a local area scoped network having non-access-stratum procedures e.g. MF network
- the embodiment may be carried out in or by the user equipment.
- the user equipment may comprise elements or functions, such as a chipset, a chip, a module etc., which can also be part of the user equipment or attached as a separate element to the user equipment, or the like.
- each block and any combination thereof may be implemented by various means or their combinations, such as hardware, software, firmware, one or more processors and/or circuitry.
- the apparatus 3 shown in Fig. 3 may comprise a processing function, control unit or processor 31 such as a CPU or the like, which is suitable for executing instructions given by programs or the like related to the network element control procedure.
- control unit or processor 31 such as a CPU or the like, which is suitable for executing instructions given by programs or the like related to the network element control procedure.
- the processor 31 is configured to execute processing related to the above described access to a local area scoped network having non-access-stratum procedures (e.g. MF network).
- the processor 31 comprises a sub-portion 310 as an identification unit configured to identify an available access point of the local area scoped network having non-access-stratum procedures.
- the portion 310 may be configured to perform processing according to S1 1 of Fig. 1 .
- the processor 31 comprises a sub- portion 310 usable as a transmission unit configured to transmit a message to the access point, indicating a request for retrieving network information, wherein the information is queried from the network before authentication and actually connecting to the network.
- the portion 31 1 may be configured to perform processing according to S12 of Fig. 1 .
- the processor 31 comprises a sub-portion 312 usable as a selection unit configured to select a service provider of the network based on received network information for binding the network identity to the selected service provider for accessing.
- the portion 312 may be configured to perform processing according to S13 of Fig. 1 .
- the processor 31 comprises a sub-portion 313 usable as a processing unit configured to conveying a Non-Access Stratum service request to the network to cause authentication of the user equipment for connecting to the network.
- the portion 313 may be configured to perform processing according to S14 of Fig. 1 .
- Fig. 4 depicts a block diagram of an apparatus comprised in a network element, including a function for enabling access of a user equipment to a local area scoped network having non-access-stratum procedures (e.g. MF network). It should be understood that each block and any combination thereof may be implemented by various means or their combinations, such as hardware, software, firmware, one or more processors and/or circuitry.
- the network element 4 shown in Fig. 4 may comprise a processing function, control unit or processor 41 such as a CPU or the like, which is suitable for executing instructions given by programs or the like related to the network element control procedure.
- control unit or processor 41 such as a CPU or the like, which is suitable for executing instructions given by programs or the like related to the network element control procedure.
- the processor 41 is configured to execute processing related to the above described access to a local area scoped network having non-access-stratum procedures (e.g. MF network).
- the processor 41 comprises a sub-portion 410 as a reception unit configured to receive a message from the user equipment, indicating a request for retrieving network information, wherein the information is queried from the network before actually connecting to the network.
- the portion 410 may be configured to perform processing according to S21 of Fig. 2.
- the processor 41 comprises a sub- portion 41 1 usable as an accepting unit configured to accepting the request without authentication and transmitting network access information to the user equipment.
- the portion 41 1 may be configured to perform processing according to S22 of Fig. 2.
- the portion 410 may be configured to perform processing according to S21 of Fig. 2.
- the processor 41 comprises a sub-portion 412 usable as binding unit configured to bind, upon receiving information about a selection of a service provider by the user equipment, the network identity to the selected service provider for accessing.
- the portion 412 may be configured to perform processing according to S23 of Fig. 2.
- the processor 41 comprises a sub-portion 413 usable as processing unit configured to, upon receiving a Non-Access Stratum service request from the user equipment, allow authentication of the user equipment for connecting to the network.
- the portion 413 may be configured to perform processing according to S24 of Fig. 2.
- reference signs 32, 42 and 33, 43 denote transceiver or input/output (I/O) units (interfaces) connected to the processor 31 , 41 .
- the I/O units 32, 42 may be used for communication with the elements.
- the I/O units 33, 43 may be used for communicating with a management application.
- Reference sign 34, 44 denotes a memory usable, for example, for storing data and programs to be executed by the processor 31 , 41 and/or as a working storage of the processor 31 , 41 .
- Fig. 5 schematically shows a protocol stack according to certain embodiments of the invention.
- An UE 51 is connected to a MF network element 53 via a MF-AP 52.
- the UE 51 comprises layers, such as radio layers, Radio Resource Control RRC and Non-Access Stratum NAS, whereas the MF network element 53 comprises transport layers and Non- Access Stratum NAS.
- Fig. 6 is an example of Non-Access Stratum NAS procedures with query in a MF network.
- the phases include 1 ) network identification, 2) query, 3) service request, 4) interface setup and 5) mobility.
- the network identification includes a network-type equal to MF and network identity, which has a defined relationship to the service provider.
- the relationship of MF identity to the service provider identity may be a HASH function, or MF identity can be a given identity for a given service provider (e.g. assigned by some organization).
- NAS associate request may be quite a minimized procedure as follows; after the UE has selected a MF-AP based on signal measurements and based on its advertised MF identity to communicate with, the MF-AP uses a temporary-cRNTI (Cell Radio Network Temporary Identifier) for signaling the allocations of radio resources for the query phase.
- the actual c-RNTI can later be assigned for use during and after the radio bearer setup.
- c-RNTI can identify the UE operational in a MF network, despite of whether the UE's full identity is granted by the cellular operator or by a service provider.
- the query phase includes binding of the MF network identity to the service provider.
- the MF network identity can indicate the access network provider, which can be the same as the Service Provider or it can be different from the Service Provider.
- a single access provider can provide access network for multiple Service providers.
- UE may move in the MF network by selecting cells, which have the correct MF identity and omitting cells, whose MF identity does not match. In this selection, further query is not needed, because the MF network identity is sufficient to ensure the initially queried information is valid and the same Service Provider is reachable.
- This binding covers at least all the following; the access network provider is the same as the Service Provider, the access network provider is different from the Service Provider, the access network provider provides multiple, a list of, Service Providers.
- UE may find further information about at least one of the capabilities and performance metrics of the MF network or a network segment. This way, the UE may already in an early phase, before authentication, decide whether it will try to access this MF network or not.
- the interface setup. MF:lnterface_Setup is actually a procedure which will create the necessary logical interfaces in the MF network, and it will result in radio bearer setup between the MF-AP and the UE, and it will hence create the interface between the UE and the network.
- the "interface" between the UE and the MF network can be an IP address.
- the process illustrated in Fig. 6 may actually consist of more than one elementary procedures. It is noteworthy that the "interface" in Fig. 6 is not drawn to the UE even if it actually creates the interface for a UE in the network. That is what happens according to the invention in the radio bearer setup i.e. the NAS level interface is established on top of establishing the radio bearer.
- the "interface” is a logical higher layer interface, which may be an IP address, a network interface identifier, an access service set identifier or it may be a conception of a bearer, similar to eps-bearer, for example.
- a bearer may not need to exist if the interface is functional by some other logical relationship between the network elements.
- mobility in the MF network is provided by a forward type of handover, but as well a backward type of handover could be provided at least for a robust backup solution. Further, re-establishment procedures to a new target cell can be executed, because context fetch from any source cell can be expected to be fast and executed easily inside a MF network domain.
- the query procedure may be executed as a set of Radio Resource Control (RRC) messages, instead of, or in addition to the NAS- messages.
- RRC Radio Resource Control
- NAS-message in here, is any message which is exchanged between the UE and the core network entity (MF CN) with or without MF-AP involvement.
- RRC-procedure can be used for fetching information available in the MF-AP, such as the metric information. It is possible that some metric information has to be fetched from a more distant network element for example from the mini-EPC or from a server. Service Provider information would require fetching from the MF CN.
- NAS-procedures can be operational between the UE and the MF CN, hence the procedure called MF:NAS_Query can mean a procedure, which executes for the NAS access, either in the RRC-procedure, in the NAS- procedure or in combination thereof. So, the said MF:NAS_Query is a procedure operating for the NAS, despite of the actual procedural layers it is implemented into.
- NAS access is the concept of the set of non-access stratum signaling procedures, i.e. the means how UE connects to and ATTACH to the core network element in the MF network.
- NAS access is clearly different from WLAN, which is not a cellular network but rather WLAN is an extension of the Ethernet.
- WLAN works with its permanent device Ethernet MAC-address and acts as the first/last few tens of meters of the Ethernet.
- MF is a 3GPP compatible network in its procedures.
- the UE identification can be linked to the PLMN's registry as the home subscription (or to a visited subscription) or to a service provider registry such as to a uniform resource name (urn). Such urn could be obtained e.g. by a registration into a web-page.
- urn uniform resource name
- the MF:NAS_Query procedure can be used to retrieve network metrics from the LTE based unlicensed MF network. Some example metrics are given below.
- PRB Physical Resource Blocks
- - PRB peak to average ratio The ratio of the short term peak number of PRBs occupied divided by the long term average PRB usage. For example, this ratio could be 20% or 500%, which could show that the PRB resource use is very peaky. For example for the 20% average PRB load the peak of 20% could consume 24% of PRBs whereas the peak of 500% could consume 100% of PRBs respectively.
- the time unit for the peak calculation can be set to a value from a single sub-frame to a defined number of sub-frames smaller than the averaging period.
- PDCP Packet Data Convergence Protocol
- SDU Service Data Unit
- This metric can be averaged over the (population) of served UE and differentiated per QoS class i.e. the delay can be given per QoS Class Identifier (QCI).
- QCI QoS Class Identifier
- the PDCP SDU can typically be for example an IP packet.
- An IP packet could for example carry a Transmission Control Protocol (TCP) segment or a unit of the User Datagram Protocol (UDP).
- TCP Transmission Control Protocol
- UDP User Datagram Protocol
- CQI Channel Quality Indicator
- MF-AP knows this from its served UE's reports, and it is indicative of the interference load in the cell or in the MF network.
- This metric can be queried per cell or per MF network (or a subnet). When the metric is queried per MF network, the metric is returned as averaged over several UE reports (of link quality) in all the cells of the MF network.
- CQI loading There may still be notable differences in CQI loading in different cells in the MF area. Also, the UEs in a single cell may report largely different CQI load due to their location in the cell area.
- the eNB can include to a CQI load metric a set or a subset of CQI observations from a set or a subset of UEs, the observations of which it considers relevant for the metric.
- Fig. 7 shows the state diagrams of a UE in a MF network. MF network states can appear as concurrent to the 3GPP state(s) or the states can be standalone (without other 3GPP networks). The compound 3GPP states and MF states are shown in Fig 7a, and the standalone MF states are shown in Fig 7b.
- the UE state in a MF network is independent of its state(s) in the 3GPP networks. Hence, any state in the 3GPP network may lead to the MF connected state.
- Reference sign 71 in Fig 7a shows the UE in E-UTRA (LTE) RRC Connected state making a MF Query and possibly entering to the MF connected state.
- Reference sign 72 shows the MF state transition while UE being in the E-UTRA (LTE) RRC Idle state.
- the associate is done first without a state transition. While associated, the UE may make Query according to the embodiments of the invention, whether to get connected to a MF network or not. If the UE decides, based on the Query, not to attempt connection to a MF network, the UE will remain in the original state, from where it can make an association to another candidate MF network and execute Query for that. If UE in any of these associations get favorable Query response, the UE can decide to attempt connecting to the selected MF network. In case the following NAS-procedure is successful, the UE can reach connected state in the selected MF network. It is also possible that the NAS procedure will lead to a failure e.g.
- the Query phase is shown in Fig 7a as a pass-through box, which indicates that the Query does not form a UE state of its own but is rather an intermediate functionality, for information Query according to the invention, which lets the UE decide to terminate the Query either to the original state or to the NAS service request attempt towards the MF connected state, ending to the MF connected state or to a failure return to the original state.
- a Query happens in a clearly defined state of its own.
- Fig 7b an UE is shown with the standalone MF states. The operation is similar to Fig. 7a in respect to the MF network without any concurrent aspect of the 3GPP network.
- UE in idle state may decide to associate to a MF-AP and do Query according to the invention. If the UE decides, based on the Query, not to attempt connection to a MF network, the UE will remain in the original state, from where it can make an association to another candidate MF network and execute Query for that. If UE in any of these associations get favorable Query response, the UE can decide to attempt connecting to the selected MF network. In case the following NAS-procedure is successful, the UE can reach connected state in the selected MF network. It is also possible that the NAS procedure will lead to a failure e.g.
- the Query phase is shown in Fig.7 as a pass-through box, which indicates that the Query does not form a UE state of its own but is rather an intermediate functionality, for information Query according to the invention, which lets the UE decide to terminate the Query either to the original state or to the NAS service request attempt towards the MF connected state, ending to the MF connected state or to a failure return to the original state.
- a Query happens in a clearly defined state of its own.
- the invention can be implemented to a UE as a set of radio features and signaling procedures.
- the invention can be implemented as a network architecture elements and protocols executed therein.
- the UE can refer to any 3GPP device category including smart phones, laptops, wearables, machines and internet of things.
- the invention has several advantages. It defines a 3GPP compatible standalone network, which can operate on the unlicensed frequency band satisfying the unlicensed spectrum access requirements such as bandwidth occupancy, power levels and listen-before-talk mechanisms.
- the invention allows a UE accessing any local dimension network having e.g. Ethernet connectivity, to connect to a cellular packet core network element that is reachable locally.
- this solution avoids the need of the eNB to configure the UE for a WLAN access, connection establishment.
- the invention avoids the need of UE to run different sets of protocols for its connectivity (i.e. UE can just run 3GPP instead of 3GPP + WLAN systems). Further, this allows simpler and more consistent control operation by the RRC Connection Reconfiguration compared to separately controlling 3GPP connection and WLAN connection.
- the UE In MF network, the UE is in LTE states both in the radio level (idle state and RRC Connected state/LTE connected state) and towards the core network UE is in the attached state (or detached state).
- the MF network protocols there is no need to introduce any change at radio level (specification and implementation).
- the invention with query has additional benefits, such as avoiding broadcasting long System Information messages with full service provider identity (e.g. FQDN), avoiding selection of access points which do not offer the preferred service or preferred service provider selection, avoiding selection of a network, which is not capable of serving with sufficient performance and quality, avoiding unnecessary switching from the idle state to the LTE connected state, and avoiding setting up the eps-bearer, interfaces and ATTACH, unnecessarily.
- FQDN System Information messages with full service provider identity
- embodiments of the present invention may be implemented as circuitry, in software, hardware, application logic or a combination of software, hardware and application logic.
- the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media.
- a "computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer or smart phone, or user equipment.
- circuitry refers to all of the following: (a) hardware- only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) to combinations of circuits and software (and/or firmware), such as (as applicable): (i) to a combination of processor(s) or (ii) to portions of processor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) to circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
- circuitry would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
- circuitry would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in server, a cellular network device, or other network device.
- the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the above- described functions may be optional or may be combined.
- EPS Evolved Packet System in here including EPS, and/or MF EPS
- LAA LAA Licensed Assisted Access of LTE LBT Listen-Before-Talk mechanism to access unlicensed spectrum by LTE
- MF MuLTEfire a local area scoped network with NAS access procedures MF-AP Access point of a MF network
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Priority Applications (11)
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JP2018532032A JP6663998B2 (en) | 2015-12-18 | 2015-12-18 | Method, apparatus and computer program product for accessing a local area scoped network with non-access layer procedures |
EP15820115.2A EP3391689A1 (en) | 2015-12-18 | 2015-12-18 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
US16/062,800 US11140552B2 (en) | 2015-12-18 | 2015-12-18 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
PCT/EP2015/080560 WO2017102030A1 (en) | 2015-12-18 | 2015-12-18 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
BR112018012471-0A BR112018012471B1 (en) | 2015-12-18 | 2015-12-18 | METHOD FOR A USER EQUIPMENT TO ACCESS A LOCAL AREA SCOPE NETWORK THAT HAS NO ACCESS LAYER PROCEDURES, METHOD FOR ALLOWING A USER EQUIPMENT ACCESS TO A LOCAL AREA SCOPE NETWORK THAT HAS NO ACCESS LAYER PROCEDURES, APPARATUS THAT INCLUDES A FUNCTION FOR A USER EQUIPMENT TO ACCESS A LOCAL AREA SCOPE NETWORK THAT HAS NON-ACCESS LAYER PROCEDURES AND APPARATUS INCLUDING A FUNCTION FOR ALLOWING A USER EQUIPMENT ACCESS TO A LOCAL AREA SCOPE NETWORK THAT HAS NO ACCESS LAYER PROCEDURES |
CN201580085824.6A CN108702701B (en) | 2015-12-18 | 2015-12-18 | Method, apparatus and computer program product for accessing a local area network with non-access stratum procedures |
EP16816277.4A EP3391690A1 (en) | 2015-12-18 | 2016-12-19 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
PCT/EP2016/081703 WO2017103256A1 (en) | 2015-12-18 | 2016-12-19 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
US16/063,511 US10834593B2 (en) | 2015-12-18 | 2016-12-19 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
PH12018501303A PH12018501303A1 (en) | 2015-12-18 | 2018-06-18 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
HK18116442.0A HK1257294A1 (en) | 2015-12-18 | 2018-12-21 | Method, apparatus and computer program product for accessing a local area scoped network having non-access-stratum procedures |
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CN108702701A (en) | 2018-10-23 |
US10834593B2 (en) | 2020-11-10 |
BR112018012471B1 (en) | 2024-01-23 |
EP3391690A1 (en) | 2018-10-24 |
CN108702701B (en) | 2021-07-23 |
US11140552B2 (en) | 2021-10-05 |
HK1257294A1 (en) | 2019-10-18 |
JP2018538756A (en) | 2018-12-27 |
JP6663998B2 (en) | 2020-03-13 |
PH12018501303A1 (en) | 2019-02-11 |
US20200288530A1 (en) | 2020-09-10 |
EP3391689A1 (en) | 2018-10-24 |
WO2017103256A1 (en) | 2017-06-22 |
US20180376411A1 (en) | 2018-12-27 |
BR112018012471A2 (en) | 2018-12-11 |
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