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fcc930975597116eb21de958d20d3f3d | 03.56 | 4.4 CTS Radio interface | The CTS radio interface is based on the use of a modified GSM radio interface as specified in [5].
The concept is to construct a modified GSM radio interface which requires no change of ME hardware, only software need be changed. The modified GSM radio interface shall (on both uplink and downlink) only cause minimal di... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.4.1 Adaptive Frequency Allocation | In order to minimise interference between CTS networks and GSM networks, an Adaptive Frequency Allocation (AFA) mechanism is adopted, where by the CTS FP chooses frequencies within a valid GFL where the up link and down link is interfered the least. The concept and the mechanisms used are described in more detail in [5... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.4.2 Total Frequency Hopping | To reduce further the possibility of interference (with the GSM PLMNs and others CTS-FP/MS pairs) a Total Frequency Hopping (TFH) mechanism is adopted. The concept of TFH and the mechanisms used are described in more detail in [5]. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.4.3 CTS and GSM compatibility issues | CTS service cannot be offered to existing mobile implementations without a change of software.
Compatibility issues for GSM mobiles which are not operating in CTS mode may be solved by two ways:
• the CTS radio interface is designed in order to create minimum disturbance to existing mobile implementations as specified ... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.5 CTS operational requirements | The CTS operator together with agreements from the GSM operator can define the coverage conditions under which CTS service can be offered to the subscriber. The following coverage conditions are identified:
• GSM coverage from the DPLMN. That is to say where the coverage of the DPLMN meets the cell (re)selection criter... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.5.1 GSM coverage from DPLMN | In this case the CTS FP's coverage is fully within the coverage of the DPLMN.
Figure 1: GSM coverage from DPLMN |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.5.2 Limited GSM coverage from DPLMN | Two cases are identified.
Figure 2: Limited GSM coverage from DPLMN
The coverage of the DPLMN is partially achieved in the range of the CTS FP.
Figure 3: Limited coverage from DPLMN within T TRANSPORT
The coverage of the DPLMN is not achieved in the range of the CTS FP but is located within a distance, such that, the t... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.5.3 No GSM coverage from DPLMN | The time between leaving DPLMN and entering the CTS FP coverage is longer than T_TRANSPORT.
Figure 4: No GSM coverage |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.6 CTS Reference Model | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.6.1 General CTS Reference Model | The general reference model of the CTS service has the following additional network elements:
• the CTS-HLR is the functional entity handling CTS-FP subscriptions;
• the CTS-SN is the functional entity performing the communication with CTS-FP via the Cf interface which uses the fixed network as a bearer.
The Cd' interf... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.6.2 Simplified CTS reference model (limited enrolment control) | Initial CTS introduction should may allow an easy introduction of the service. This section deals with simplified CTS reference model.
Simplification of the CTS reference model can be achieved if the CTS operator chooses that enrolment is only checked locally in the CTS-FP see section 4.9.1 Enrolment control at the CTS... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.6.3 Simplified CTS reference model (Licence exempt CTS band) | This section is relative to the usage of CTS capable devices with a CTS license exempt radio band.
In this case the frequency allocation for CTS usage is defined directly by national authorities. All the radio information relative to CTS usage are stored in the CTS-FP by the CTS-FP manufacturer. These radio information... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.6.4 CTS connected to PLMN reference model | In the case of a CTS-FP connected to a GSM network the general reference model is modified as described below:
Figure 7: Simplified CTS reference model (limited enrolment control)
The Cf interface between the CTS-FP and the fixed network is replaced by a GSM standard Um interface with a GSM network. On this Um interfac... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7 GSM Operator control of CTS service | The GSM operator has control of the CTS service that is operating in his PLMN. The stage 3 CTS specifications shall ensure that it shall not be possile to operate a CTS service without the permission of the GSM operator.
When a CTS capable mobile accesses a GSM PLMN it will be provided with information in order to allo... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.1 CTS System control | Control of the CTS operation depends of the frequency scenario of the country (or region) in which CTS service is to be provided. Two scenarios are foreseen:
• licence exempt frequency band is used for CTS operation; this is where the relevant authority in a country (or region) has allocated a frequency band for CTS se... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.2 GSM Operator control of CTS frequency list | One of the major concepts of CTS is the control of the frequencies for use by the CTS-FPs. The frequency allocation for CTS operation is termed the GFL (Generic Frequency List).
The GFL is the frequency allocation that either a GSM operator has agreed to give to the CTS operator for the operation of a CTS service withi... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.3 CTS system initialisation for license exempt frequency band for CTS operation | In this case the frequency allocation for CTS usage is defined directly by national authorities. All the radio information relative to CTS usage are stored in the CTS-FP by the CTS-FP manufacturer. These radio information are linked with a geographical information which informs the CTS-FP in which country (or region) t... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.4 CTS system initialisation with DPLMN coverage and limited coverage | In order to avoid that the CTS service be too cumbersome to own, the initialisation of the CTS FP is such that the precise GFL for CTS operational purposes may be obtained sometime after CTS operation has been started. This means that for a short period of time the CTS-FP need not be using the GFL that is best suited t... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.4.1 First stage CTS-FP initialisation (Temporary GFL allocation) | The CTS-FP SIM shall have a telephone number which is preloaded by the CTS operator when the service is subscribed. This Telephone number is used by the CTS-FP to call the CTS-SN. The CTS-SN can verify the validity of the subscription and perform authentication of the CTS-FP at this stage. The CTS-FP shall also perform... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.4.2 Second stage CTS-FP initialisation (GFL confirmation) | As part of the signalling procedures the CTS-FP shall demand the CTS-MS to provide location information to the CTS‑FP see "9.1.2 Update of CTS FP frequencies". The CTS-FP stores this information and provides it to the CTS‑SN the next time the CTS-FP contacts the CTS-SN. The CTS-SN/CTS-FRA uses this information to alloc... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.5 CTS system initialisation without DPLMN coverage | The initialisation of a GFL without DPLMN coverage is FFS. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.6 GFL update | Once a GFL is confirmed, the GFL may be updated by the operator as part of the regular changes he makes in his frequency plan of the network. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.6.1 CTS FP GFL update | Subsequent GFL allocations need not involve the CTS-MS and can be made directly by dialogue between the CTS–FP and the CTS-SN.
In order that frequency planning of the DPLMN can be taken into account when the GFL is updated the CTS-FP with the help of the CTS-MS(s) collects the identity of DPLMN cells which surround the... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.7.7 Erasure of GFL in the CTS FP | The CTS FP will erase a GFL when the period of validity for a GFL expires. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.8 De-initialisation of CTS FP | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.8.1 CTS Operator control mode | A CTS FP will become de-initialised if the CTS FP is:
• Disconnected from the mains power for a period of time [10 minutes]; and/or
• Disconnected from the PSTN connection for a period of time [10 minutes]; and/or
• When the CTS-SIM is removed from the CTS-FP;
• When specifically commanded by CTS SN.
In addition to thi... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.8.2 Licence exempt mode | A CTS-FP will de-initialise itself if the country code reported by any attached mobiles does not correspond with the country code stored in the CTS-FP. This is made according with the following procedure:
• In order to avoid illegal roaming of CTS-FP, the CTS-MS(s) collects the identity of DPLMN cells which surround th... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9 CTS MS Enrolment | Enrolment is the process of obtaining permission to use the CTS service of a CTS-FP by a CTS-MS. The enrolment process may involve the verification of agreements between a CTS-MS subscriber with a CTS operator, a GSM operator and a CTS-FP subscriber and the exchange of information for control of the CTS subscription at... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9.1 Enrolment control at the CTS-FP | Enrolment control at the CTS-FP can be controlled by the operator either:
• pre-populating the SIM of the CTS FP with IMSI ranges; or
• by the CTS-SN during signalling exchanges between the CTS-SN and CTS-FP.
In each of the above cases the CTS-FP is given information as to the range of IMSI values [16 ranges] that the ... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9.2 Enrolment control at the CTS-SN | The CTS-SN can control initial enrolment and surveys enrolment for previously enrolled CTS-MS.
The enrolment process performed at the CTS-SN gives a CTS-MS the right to have CTS services on a CTS-FP for a certain period of time (determined by the CTS operator). This period of time shall not be capable of being altered ... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9.2.1 Initial enrolment at the CTS-SN | The CTS-FP may contact the CTS-SN via the access network to demand enrolment of a CTS-MS. In this case the IMSI of the CTS-MS is given to the CTS-SN.
In this case the CTS-SN shall perform range checking on the IMSI to verify roaming agreements and may interrogate (under operator control) the HLR of the CTS-MS in order ... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9.2.2 Subsequent enrolment at the CTS-SN | Subsequent enrolment is required to check that enrolled CTS-MSs still have the right of using CTS service. As part of the supervisory activities the CTS-FP requires to contact the CTS-SN at specific points in time either for reallocation of the GFL or other supervisory procedures. During these communications the CTS-SN... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9.3 Agreement between the CTS FP Subscriber and CTS MS subscribers | The CTS FP subscriber chooses to give the right to a CTS MS subscribers to have access to his CTS FP.
This is performed by the CTS FP owner entering information into the CTS FP as defined by [4].
The CTS FP will only allow the CTS MS to have access once the CTS operator authorisation procedure has been successfully com... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.9.4 CTS authorisation check of enrolment of a CTS MS onto a CTS FP | Enrolment of the CTS MS to a CTS FP involves:
• Optional Authentication of the CTS MS by the HPLMN via the CTS-SN;
• Optional Subscription check for the CTS MS by the HPLMN via the CTS-SN.
Confirmation of enrolment requires mutual authentication to taken place as described in [4]. The enrolment of a CTS-MS has an assoc... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.10 De-enrolment of CTS MS from a CTS-FP | The CTS FP can receive a command to remove the enrolment of a specific CTS MS at any time see [4].
If the validity period for a particular CTS MS expires then the specific CTS MS shall become de-enrolled.
De-enrolment can be commanded by either the CTS-FP subscriber or the CTS-SN. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.10.1 Mutual autentication | Mutual authentication is a concept whereby the CTS MS/CTS FP can check that the controlling network is a valid network. This protection mechanism is needed to ensure that both GSM and CTS operator can protect themselves from intrusion see ref [4]. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.11 CTS MM and CM layers | The message exchange on the Um* interface shall be (as close as possible) to the GSM 04.08 interface. The exceptions to this are the security procedures as specified in [4] which may be substituted in place of the normal GSM procedures. The CTS standard still allows the use of the normal GSM authentication and cipherin... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.12 CTS MM and CM layers on the fixed network side | The CTS standard specifies the protocols on the CTS Um* interface only. The standard specifying the split between these layers on the fixed network side is left open to implementation. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.13 CTS Mobility services | CTS mobility services are to be specified for the CTS Um* interface only. Mobility in the fixed network (i.e. towards other nodes in the fixed network) is out of scope of this recommendation. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.13.1 CTS support in idle mode | Cell selection and reselection mechanisms are described in [5].
It should be possible for the CTS MS subscriber to choose preferences between either GSM or CTS coverage. When in CTS coverage, it should be possible that the user set preferences between different CTS coverage. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.13.2 CTS attach and detach | CTS mobility services offer the ability to attach an enrolled CTS-MS to a CTS-FP. The camping of a CTS-MS on a CTS-FP requires that the CTS-MS performs an attachment to the CTS FP.
In the case where a CTS-MS is disabled (i.e. turned off, etc) whilst attached to the CTS-FP, the CTS-MS can, under certain circumstances, i... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.14 CTS CM layer | The CTS CM layer is specified for the local CTS system only. The CTS CM layer in the fixed network is out of scope of the present document.
The CTS CC layer is specified in GSM 04.08 section 5. The CTS CC layer is modified in order to introduce extra functions (eg Hook Flash) as specified in [4] |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.14.1 CTS service indication | Once attached to a CTS-FP the MS shall indicate that CTS service is available.
The CTS user can define a name (alphanumeric name, icon, etc) for each of the CTS cells to which it has access (i.e. attached). The MS will, when attached and in coverage of a CTS cell and if required by the user, indicate to the user the cu... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 4.15 Subscriber information for CTS | A CTS-MS subscriber may be enrolled on several CTS FPs. It shall be possible for the subscriber to establish an order of preference between the allowed CTS-FPs.
Subscriber specific CTS information can be stored and managed in the HLR.
In addition to subscriber details in the HLR, it is also necessary for subscriber spe... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 5 Transmission | No specific requirements are identified. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6 Information storage | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.1 Information managed per CTS-MS subscriber | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.1.1 Stored in the CTS-MS SIM | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.1.2 Stored in the HLR | CTS MS subscriber CTS subscription may be stored in the HLR. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.1.3 Stored in the MSC/VLR | CTS MS subscriber CTS subscription may be stored in the MSC/VLR. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.2 Information managed per CTS-FP subscriber | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.2.1 Stored in the CTS-FP SIM | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.2.2 Stored in the CTS-FPE | CTS-SN Telephone Number is stored in non volatile memory in the CTS-FPE. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.2.3 Stored in the CTS-SN | CTS-FP subscriber's subscription information may be stored in the CTS-SN. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 6.2.4 Stored in the CTS-HLR | CTS-FP subscriber's subscription information may be stored in the CTS-HLR. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7 Identities | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.1 Identification of the CTS-FP | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.1.1 IFPSI | A CTS specific identity is assigned to a CTS FP subscriber of a CTS service. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.1.2 IFPEI | Each CTS-FP is assigned by the manufacturer a unique IFPEI number see GSM 03.03 [3].
The coding rules of the IFPEI and the rules for changing the IFPEI shall be equal to the rules defined for the IMEI in GSM 03.03 [3]. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.1.3 FPBI | The CTS-FP broadcasts (after CTS-FP initialisation has been performed) a beacon which carries information conveying the Fixed Part Beacon Identity which identifies the CTS-FP. The FPBI need not be unique due to the capacity of signalling on the beacon. The FPBI is defined in GSM 03.03 [3]. The use of the beacon and the... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2 Addressing parameters | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2.1 Addressing the CTS-FP | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2.1.1 CTS-FP Fixed Network dialling number | This is the fixed network dialling number (PSTN/ISDN) to which the CTS-FP is connected. A single CTS-FP may have several fixed network dialling numbers. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2.1.2 CTS FP name | It shall be possible to assign a subscriber-defined identifier to each CTS FP. The CTS FP name can e.g. be an icon or an alphanumeric text up to 10 characters. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2.2 Addressing the CTS-MS subscriber | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2.2.1 MSISDN | The MSISDN is the dialling number at which the CTS-MS can be reached in the cellular network. It may also be used for CTS applications.
In order to address a CTS-MS by its MSISDN, this number has to be known by the CTS-FP and the CTS-MS. The MSISDN may be submitted to the CTS-FP either:
• from the CTS-HLR at CTS-MS enr... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 7.2.2.2 CTS-MS Subscriber Identity(CTS-MSI) | The CTS-MSI is an CTS-MS identity which has only local significance between a CTS-MS and CTS-FP pair, its purpose is to maintain the anonymity of the users of the CTS service as specified in [4].
The CTS-MSI is assigned and maintained by the CTS-FP during CTS-MS enrolment, and is reallocated by the CTS-FP during CTS at... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 8 Operation and maintenance aspects | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9 Function and information flows | The following functional flows deal with the initial phase of CTS where roaming is not supported. In this case the DPLMN, HPLMN and the CTS operator need to be the same. If they are the same then this allows the CTS reference model to be simplified as the CTS FRA can be integrated in to the CTS SN thus simplifying the ... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.1 CTS FP management | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.1.1 CTS FP Initialisation | CTS FP initialisation can be envisaged in two phases.
The data flow diagram below shows the flows required for CTS FP initialisation.
Figure 9: CTS FP initialisation
1 The CTS-FP subscriber wants to initialise a CTS-FP. He triggers an MMI procedure. The CTS-SN telephone number is used by the CTS-FP to contact the CTS-S... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.1.2 Update of CTS FP frequencies | The data flow diagrams below shows the flows required for gathering the DPLMN surrounding cells and the updating the CTS FP GFL.
Figure 10: CTS MS Home cell reporting
1 The CTS MS remembers the cells it last camped on from the DPLMN and the time it left each cell.
2 This cell information is given to the CTS FP during s... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 2 Authentication of the CTS FP is made by the CTS SN and HLR | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 3 DPLMN information is given by the CTS FP for location purposes | 4 GFL is updated and the CTS-FP authenticates the CTS-SN.
This procedure also forms part of the CTS-FP initialisation procedure where the Temporary GFL (allocated during the first initialisation) is replaced by the GFL based on location information. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.2 CTS management for CTS MS | The GSM PLMN controls the MS as to whether it can operate CTS. When the CTS-MS access the GSM PLMN it will receive signalling which informs the CTS-MS whether it can perform CTS operations.
Figure 12
1 The MS performs a location update in the DPLMN.
2 Authentication is performed.
3 If CTS is allowed in the PLMN, or thi... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.3 CTS integration to Fixed Mobile Convergence applications | In order to use CTS for FMC applications it is suggested that a hook be provided in order to facilitate FMC applications. To this end it is envisaged to allocate a FMC Telephone Number, for instance on the CTS-FP SIM. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.4 Functions related to MS in idle mode for support of CTS | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.4.1 Cell selection and reselection | The definition of a "suitable cell", as defined in GSM 03.22, is extended with the following criterion:
An CTS-MS with SIM indicating CTS subscription shall always try to select the cell with the highest CTS FP priority according to the information stored on the SIM. The CTS selection parameters last received from the ... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.4.2 DPLMN Cell information gathering | As the CTS-MS roams through the DPLMN it shall gather information as to the cells it has passed through. This cell information is stamped with the time that the MS either left the cell or lost GSM coverage with the cell. The figure below shows the required functional behaviour.
When the CTS-MS gives this information to... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.4.3 CTS local mobility | The presence and absence of a CTS-MS needs to be determined by the CTS-FP as part of the local CTS mobility procedures. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.4.3.1 CTS attachment | CTS attachment is a procedure by which a CTS-MSs presence is made known to the CTS-FP. The attachment to a CTS-FP is made by the CTS-MS when the CTS-MS comes within coverage of the CTS-FP.
The CTS Attach procedure shall replicate the protocol as expected as in GSM, with the exceptions to the local security procedures d... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.4.3.2 CTS detachment | CTS detachment is a procedure by which a CTS-MSs non presence is made known to the CTS-FP. When a CTS-MS is attached the CTS-FP shall regularly ensure that the CTS-MS is within CTS-FP coverage, if the CTS-MS is found to be out of coverage the CTS-FP will mark the CTS-MS as detached. If the MCTS-MS is powered down withi... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.5 Functions related to active mode support of CTS | 9.5.1 MS connection establishment for MT and MO calls.
When calls are established the CTS FP shall perform Authentication and Ciphering as specified in 03.20. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.5.2 Handover | Handover between instances of CTS radio interfaces shall be supported by the CTS MS when the same CTS FP controls these CTS radio interfaces. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 9.6 Overview of signalling | Security procedures such as authentication, ciphering and key distribution are defined in order to protect the GSM network and the user communication. CTS operation is initialised by downloading operation control information into the CTS-FP. The operator can change and de-activate CTS operation via the GSM Radio Interf... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10 CTS Architecture | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.1 CTS Elements | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.1.1 CTS Fixed Part | CTS Fixed Part (CTS-FP) is the logical and physical element, which provides the link to the access network. For this purpose it controls on the one side one or more CTS Radio Interface and on the other side one or more access network interface. The interworking between both interfaces is implemented in the CTS-FP inter... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.1.2 CTS Mobile Station | The CTS Mobile Station (CTS-MS) is the logical and physical element which provides to the user cordless access to the fixed network or the GSM network. The CTS-MS consists of GSM Mobile Equipment and a GSM-SIM, both with additional CTS capabilities.
Figure 18: The CTS-MS and its main functional entities |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.1.3 CTS controlling and supporting network entities | In order to control and support the CTS, the following functional entities are situated in the GSM network:
• the CTS-AuC is the functional entity for performing authentication of the CTS-FP SIM;
• the CTS-HLR is the functional entity which contains the data base of the CTS-FP subscribers of the CTS operator. This data... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2 CTS Interfaces | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.1 CTS Radio Interface (Um*) | The CTS Radio Interface is used for local communication between CTS MS and the CTS FP. It provides a cordless connection between these two elements. This interface is referred to as Um* in the CTS specifications.
According to GSM 02.56 [2], the CTS Radio Interface is a modified GSM Radio Interface. CTS is to operate in... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.2 GSM Radio Interface (Um) | On the GSM Radio Interface the CTS-MS shall behave according to the GSM standards. As required in GSM 02.56 [2], means of the GSM Radio Interface shall be used to exchange information relevant for operation control of the CTS. User communication via the GSM Radio Interface is covered by the GSM specifications and not c... |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.3 CTS Access Network Interface | The Access Network Interface is the connection of the CTS-FP to the Fixed or mobile Network for user communication. According to GSM 02.56 [2], this interface shall also be used to transport information which is relevant for operation control. The Fixed Network Interface is referred to as Cf in the CTS specifications. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.3.1 Physical characteristics of the CTS Fixed Network Interface | The physical characteristics of the Fixed Network Interface, e.g. signal levels, shall correspond to national standards. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.3.2 Physical characteristics of the CTS GSM Network Interface | In the case of a CTS-FP connected to GSM, the physical characteristics of the GSM Network Interface, e.g. signal levels, shall correspond to GSM standards. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.4 Network internal interfaces | |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.4.1 Interface CTS SN/CTS HLR (Cd) | The Cd interface between the CTSSN and the HLR may use existing MAP procedures to receive challenge/response pairs to be used for the authentication of the CTS FP SIM when communication is performed via the access network. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.4.2 Interface CTS SN/CTS HLR (Cd') | Cd' interface between CTS SN and CTS HLR. The interface is used for CTS FP subscription control. |
fcc930975597116eb21de958d20d3f3d | 03.56 | 10.2.4.3 Interface CTS SN/CTS FRA | This interface is used when download of radio parameters shall be performed to the CTS-FP via application signalling. |
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