TR 22.899
Study on enhancements
to User Location Reporting support
V14.0.0 (Wzip)
2015/06 10 p.
- Rapporteur:
- Miss Zhang, Zhuoyun
China Unicom
Content for TR 22.899 Word version: 14.0.0
0 Introduction p. 4
1 Scope p. 5
The objective is to provide details about the possible scenarios and use cases where there is a need of enhanced user location reporting when the LCS function, as specified in TS 22.071, is not deployed. This study also aims to identify potential new requirements to fulfil the use cases and the potential interactions with existing location reporting procedures.
The service requirements will include the following aspects:
- Support for flexible and controllable location reporting policy (e.g., restrict location reporting to chosen times during the day);
- Consideration on tailored location reporting (e.g., to report the number of users with certain common characteristics in the area).
2 References p. 5
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
3 Definitions and abbreviations p. 5
3.1 Definitions p. 5
For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply.
A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
Focus Area:
The Focus Area (FA) is defined as an area in which a mobile station may move freely without triggering an update in the core network. A Focus Area (FA) includes one or several GERAN/UTRAN/E-UTRAN cells.
3.2 Abbreviations p. 5
4 Use Cases p. 6
4.1 Use case on pre-configured location reporting time p. 6
4.1.1 Description p. 6
This use case describes the scenario where the location reporting time could be pre-configured by the network.
4.1.2 Pre-conditions p. 6
The 3GPP core network supports obtaining the UE's cell information at chosen time points through the location reporting procedure in the network in which the LCS function is not supported. This procedure should not cause much signalling load to the network.
There is a primary school in cell A and a gymnasium in cell B. On the weekdays, Alice should be in the primary school in cell A from 9:00 to 15:30, and in the gymnasium to take the basketball class from 16:30 to 17:30. Alice's parents want to know whether Alice is in the correct cell at certain time points, so they sign an agreement with the MNO to provide Alice's cell information at chosen time points, such as 9:00, 12:00, 15:00 and 17:00.
4.1.3 Service Flows p. 6
On the weekdays, at any pre-configured time point, e.g., 9:00, the core network could initiate the location reporting procedure to obtain the cell information of Alice's UE.
4.1.4 Post-conditions p. 6
The core network obtains cell information of Alice's UE at a pre-configured time point, e.g., 9:00.
On the weekdays, the network provides the cell information of Alice's UE at pre-configured time point to her parents.
4.1.5 Potential Requirements p. 6
The 3GPP core network shall be able to initiate the location reporting procedure to obtain UE's cell information at pre-configured time points in the network in which the LCS function is not supported.
The 3GPP core network needs to be optimized to reduce the signaling load caused by the location reporting procedure.
4.2 Use case on tailored location reporting p. 6
4.2.1 Description p. 6
This use case describes the scenario where the network could obtain the information of interested users with certain common characteristics rather than all the users in the area through the location reporting procedure.
The definition of the subscribers' characteristics should be based on the subscribers' data, e.g., the subscriber priority status such as gold, silver or bronze subscription.
4.2.2 Pre-conditions p. 7
The network supports obtaining the location information of users with common characteristics through the location reporting procedure.
There is a shopping mall located in Cell A. The network wants to push a restaurant's introduction and discount information of the shopping mall to the gold subscribers in cell A at the lunch time.
4.2.3 Service Flows p. 7
At 11:30, the network decides to push the restaurant's introduction and discount information of the shopping mall to the gold subscribers in cell A.
The network initiates the location reporting procedure to report which gold subscribers are in cell A. The network obtains the list of all the gold subscribers in cell A.
The network pushes the restaurant's introduction and discount information to these gold subscribers in cell A.
4.2.4 Post-conditions p. 7
All the gold subscribers in cell A receive the pushed information.
4.2.5 Potential Requirements p. 7
When LCS system is not deployed, the 3GPP core network shall be able to determine which users with common characteristics are within defined cell or cells.
4.2.6 Potential Impacts or Interactions with Existing Services/Features p. 7
All gold subscribers in cell A could also receive the information through Cell Broadcast technology. Cell Broadcast is location specific and the Message Identifier IE is one possible means to distinguish target groups.
4.3 Use case on Focus Area based location reporting p. 7
4.3.1 Description p. 7
This use case describes the scenario where the 3GPP core network could be informed when the UE enters or leaves the Focus Area (FA) through location reporting procedure.
4.3.2 Pre-conditions p. 7
The 3GPP core network supports defining Focus Area which may consist of one or several cells for certain UE. The 3GPP core network also supports initiating the location reporting procedure based on the Focus Area.
There is a coffee shop in the shopping mall A. This shopping mall A is covered by several cells which constitute a Focus Area. The coffee shop signs an agreement with the operator to push advertisements to the coffee shop's VIP members when they enter into this Focus Area.
Bob is a VIP member of the coffee shop and signs an agreement with the coffee shop that he is willing to receive the advertisements and discount information.
Alice is not a VIP member of the coffee shop.
4.3.3 Service Flows p. 8
When Bob enters the Focus Area, the 3GPP core network could be informed of this event.
The 3GPP core network pushes the advertisements of the coffee shop to Bob.
When Bob leaves the Focus Area, the 3GPP core network could be informed of this event.
The 3GPP core network does not push the advertisements of the coffee shop to Bob any more.
When Alice enters or leaves the Focus Area, the 3GPP core network would not be informed of the event and would not push the advertisements of the coffee shop to her .
4.3.4 Post-conditions p. 8
When Bob enters the Focus Area, he will receive the advertisements of the coffee shop. After he leaves the Focus Area, he will not receive any pushed information about the coffee shop.
When Alice enters this Focus Area, she will not receive any pushed information about the coffee shop.
4.3.5 Potential Requirements p. 8
The 3GPP core network shall be able to define the Focus Area for certain service offered to a subscriber.
Subject to regional regulatory requirements, the 3GPP core network shall be notified when the UE either in connected mode or the idle mode enters or leaves the Focus Area.
5 Considerations p. 8
5.1 Considerations on security and privacy p. 8
Location information needs to be provided in a secure manner.
The 3GPP system shall be able to ensure that the user's identity is not provided to the 3rd party according to operator's policies to maintain the user's information privacy and respecting regulatory requirements.
5.2 Considerations on charging p. 8
There may be impact on charging aspects to the person or the third party who needs the location information e.g., accounting and usage information due to eULRS triggered location reporting.
5.3 Considerations on congestion p. 8
When the overload condition happens in core network, if it's not the critical location service, the core network shall be able to delay the procedure to obtain the users' location information.
When the overload condition happens in RAN, if it's not the critical location service, the RAN shall be able to reject a location request by indicating congestion.
6 Potential Requirements p. 8
When the LCS system is not deployed, the 3GPP core network shall be able to obtain a user's cell-level location at pre-configured time points.
When the LCS system is not deployed, the 3GPP core network shall be able to determine which users with common characteristics are covered by a defined cell or cells.
The 3GPP core network shall be able to define the Focus Area for a certain service offered to a subscriber.
Subject to regional regulatory requirements, the 3GPP core network shall be notified when the user either in connected mode or the idle mode enters or leaves the Focus Area.
7 Conclusions p. 9
The study has identified several use cases where the 3GPP system has to enhance the user location reporting procedure, when LCS system is not deployed. It has also resulted in a set of potential requirements as captured in the previous section.
It is recommended that the requirements in this TR are taken as a basis for the development of normative requirements.
$ Change history p. 10
