ACCESS CONTROL FOR COMMUNICATION IN A RADIO COMMUNICATION SYSTEM WITH SHORT RANGE

Abstract: A method and a device for access control in a radio communication system (3) with short range, for instance Bluetooth, at which a first unit (1) with a first identity (y) in said radio communication system wants to communicate with a second unit (2) with a second identity (x) in the radio communication system. The invention is characterized in the steps to transmit said first identity to said second unit; check/control access information in the second unit depending on said first identity; and to grant the first unit access for communication with the second unit over said system depending on said access information. The step to check/control access information is preceded preferably by the step to transmit (6) said access information from an access control device (4) via a secure connection on a carrier in a second communication system (5) to the second unit.

Description: ACCESS CONTROL FOR COMMUNICATION IN A RADIO COMMUNICATION SYSTEM WITH SHORT RANGE FIELD OT THE INVENTION The invention relates to a method and a device for control and configuration of access between terminals which want to communicate in a radio communication system with short range, and particularly access control of Bluetooth products via an access control server. BACKGROUND Bluetooth is a concept for short range radio communication which has been received with great attention lately and which at the same time has been developed very rapidly. From previously having been run by a closed consortium with a few operators, Ericsson, Nokia and some others, today several hundreds of operators are involved in developing products within the field. Bluetooth will for instance be used to connects differrent kinds of units with each other. Examples of this are: • Computer with mobile telephone • Mobile telephone with printer • Mobile telephone with portable handsfree • Computer with camera, etc. The technology also will be used to create small temporary networks, so called ad hoc networks. The possibilities are generally speaking innumerable, and it is actually only imagination which limits what can be achieved by Bluetooth. One important aspect in this matter is security. It is of course of great importance to secure that different products with Bluetooth in them cannot communicate with each other just anyhow. In the Bluetooth concept this has been solved by each Bluetooth unit having a unique identity number BD_ADDR which is determined according to the standard IEEE 802. It can be said to correspond to IMSI in GSM. In each Bluetooth unit there also will be support for the unit keeping account on which other Bluetooth units it is allowed to communicate with. In the near future it will possible to predict that there will be such a lot of products of different kinds with Bluetooth components in them that each unit has to be configured for which they shall be possible to communicate with via Bluetooth. This may apply both at home and at the company. This results in a big administrative problem which clearly risks becoming inflexible if it at the same time shall be secure. The present invention intends to solve this problem. Different systems and methods for access control in different types of communication networks have been described. One example is US 5,999,978 in the name of Angal et al, in which access control in a computer network is discussed. An access server controls the access of the terminals depending on information in an access database. In EP 935221 by Mitsubishi, a system is shown in which users authenticate themselves by means of biometrical sensors, for instance finger print readers, to be allowed to communicate in a network. In WO 98/20646 a system is described in which each computer in a network has an IP- address of its own, and that the access rights of these computers are defined in a table. Some other documents in the field are WO 98/57510, JP,A, 09-130397, JP,A, 10-232811 and JP,A, 11-024978. None of these documents, however, deal with the problems which the present invention does, nor are there shown any solutions which might be applied to these problems. Access control within networks with short range, for instance Bluetooth, has a lot of problems. Firstly, the communication technology Bluetooth is primarily intended for portable units. These are, for weight and space reasons, often small and have limited processing power, storing capacity and power consumption. Consequently one does not want to load these terminals with such that can be handled by stationary units. Secondly, the in the system, that is Bluetooth, including units having no possibility of continuous contact, as for instance mobile stations in a cellular mobile telephone system. In such a system, for instance GSM, the coverage areas, the cells, are overlapping, and they are defined by stationary network units, base stations. The fixed network is there all the time, and all information in that is always accessible, provided that one is authorized for it. In Bluetooth, temporary, limited networks are created, and there is in such a network normally no guarantee for which capacities for control of the network that will exist, nor which type of information that is accessible in the network, in the way one in GSM more or less always has contact with a Service Provider, SP, who provides the network services. These are further some of the problems the invention intends to solve. SUMMARY OF THE INVENTION With the aim to solve above mentioned problems, the present invention according to one aspect relates to a method for access control in a radio communication system with short range, at which a first unit with a first identity in said radio communication system wants to communicate with a second unit with a second identity in the radio communication system. The invention is characterized in the steps to transmit said first identity to said second unit; check access information in the second unit depending on said first identity; and to grant the first unit access for communication with the second unit over said system depending on said access information. The step to check access information is preferably preceded by the step to transmit said access information from an access control device via a secure connection on a carrier in a second communication system to the second unit. In one embodiment the step to transmit access information is preceded by the step to in said access control device store said access information in a memory. The step to transmit access information to the second unit is initiated in one embodiment by the access control device. In another embodiment the step to transmit access information is preceded by the step to transmit an access request from the second unit to said access control unit, which access request includes information about said first identity and said second identity. In a preferred embodiment said access control device is administered/managed by a certified authority. Said second unit communicates in one embodiment with the access control device via a carrier in a wireless, cellular communication network, and in an alternative embodiment via a wire/cable-based communication network. According to a second aspect, the invention relates to an access control device in a radio communication system with short range, at which a first unit includes a first communication device with a first identity, and a second unit includes a second communication device with a second identity, which communication devices are arranged for communication in said radio communication system. The access control device is characterized in storing device for storing of access information related to communication between said first and second unit in said radio communication system, and third communication device, connected to said storing device, arranged for transmission of said access information to the second unit. Said second unit preferably further includes fourth communication device, where said third and fourth communication devices are arranged for communication via a secure connection on a carrier in a second communication system. In one embodiment said third communication device is arranged to receive an access request from said second unit, which access request includes said first and second identity, and to transmit said access information depending on the access request. The access control device according to this embodiment includes processing/action devices connected to said storing device and third communication device, arranged to derive said access information in said storing device depending on said access request. In another embodiment, where the access control device also includes processing/action devices connected to said storing device and third communication device, said processing/action devices are arranged to derive said access information in said storing device and to initiate transmission of the access information depending on preset parameters. Said parameters can include preset time intervals for transmission, or information about new stored access information, at which a transmission is made for instance at each new stored information regarding the access to the second unit. Said second communication system is in one embodiment a wireless, cellular communication network, but can also include a wire/cable-based communication network. BRIEF DESCRIPTION OF THE DRAWINGS Preferred embodiments of the invention are described in detail below, with, at the same time, reference to enclosed drawing, at which: Figure 1 schematically illustrates Bluetooth-terminals and an access server according to one embodiment of the present invention. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The idea of the invention simply is, via different carriers, to configure and provide access for products which communicate by/with Bluetooth. Such carriers can for instance be SMS, GPRS, WAP, UMTS, or http. As a suggestion the technology is implemented by a server solution where one has a BCAC server (Bluetooth Configuration and Access Control) which communicates with products which have Bluetooth-products in them. The unique feature is that the communication to secure the access rights is made over a secure connection, in contrast to the Bluetooth-interface itself, which is shared by all products within communication range. In Figure 1 is schematically illustrated an example of an embodiment of the invention where a computer 1 detects the existence of a mobile telephone 2 via Bluetooth 3, and wants to communicate with it. The mobile telephone 2 is configured and is given access control from the BCAC-server 4 via a suitable carrier 5, in this case as a suggestion SMS. The server 4 transmits a message Access Granted 6 which allows that the unit 2, that is the mobile telephone, with Bluetooth-address x is allowed to communicate with the unit 1, that is the computer, which has Bluetooth-address y. The Access Granted-message 6 can be preceded by a request 7 from the unit 2 to the server 4, which preferably is initiated by the mobile telephone 2 having detected the existence of computer 1 and address y. Also this request 7 is transmitted over the secured connection via the carrier 5. The technology will be of particular interest if the BCAC-server 4 is under control by a certified authority like Certification Authorities CA in the Internet world. The invention may be used in a number of situations. One example concerns system administration. In most cases companies have a system administrator/manager who administrates/manages the IT-systems at the company. By means of a BCAC-server connected to different computer products, the person in question can easier administrate equipment which communicates by means of the Bluetooth- technology. Via, for instance, a computer connected to the BCAC-server, the administrator can decide which units that shall be able to communicate with each other, for instance that mobile telephones which belong to persons who are located on a certain floor shall be able to communicate with the printer on the same floor. In some cases it may be of interest to companies to allow visitors who are visiting to make use of the own internal infrastructure. A customer may, for instance, want to print a document from his/her computer 8, which he/she has brought along with him/her, on the printer of the company 9, or from the computer 8 be able to show a presentation via the fixed installed OH-projector of the company. This must be possible to effect in a secure way, since the visiting customer only shall have access to a limited amount of equipment. In addition it is desirable with maximal flexibility so that for instance a receptionist need not running around to assist the visiting customer. According to the present invention this is achieved by, for instance, the receptionist via his/her computer 10 being connected to the BCAC-server 4, by which the receptionist attends to that the units 9 which may be of interest to the visitor are configured so that the visitor can use them. This configuration includes the transmission of the visitor's computer's 8 Blue tooth identity BD-ADDR. The BCAC-server 4 also can be located with an external Service Provider, SP, at which the communication between the company and the SP is made via a secure connection, for instance an IPSsec-connection. In the future it then may be just as naturally to give/state identity number of one's Bluetooth-products which one wants to use as one today gives/states the registration number of the car when parking at the parking bay for visitors. The solution that is suggested in the present invention will be particularly interesting if Bluetooth is used in public environments, for instance a printer which is located at a public place in the city/town, for instance at the post office or the like. By having all customers of an SP in a BCAC-server, all one's customers can be offered automatic access to equipment which is managed by the BCAC- server. When more equipment is installed in public environments one need not configure all the units that shall communicate with the equipment each, but this is made centrally via the BCAC-server. Preferred embodiments of the invention have been described in form of examples, but it is to the expert evident that the suggested solution can be modified within the concept according to the invention. Further, the expert will realize that the suggested solution can be applied also to other communication systems with short range, for instance the RTI-system (Road Traffic Informatics) , which consequently is covered by the protection scope of the invention, the protection scope of which is only limited by the enclosed patent claims.

Claims: PATENT CLAIMS 1. Method for access control in a radio communication system (3) with short range, at which at first unit (1) with a first identity (y) in said radio communication system wants to communicate with a second unit (2) with a second identity (x) in the radio communication system, c h a r a c t e r i z e d in the steps to: - transmit said first identity to said second unit; - check/control said access information in the second unit depending on said first identity; - grant the first unit access for communication with the second unit over said system depending on said access information. 2. Method as claimed in patent claim 1, at which the step to check/control access information is preceded by the step to transmit (6) said access information from an access control device (4) via a secure connection on a carrier in a second communication system (5) to the second unit. 3. Method as claimed in patent claim 2, at which the step to transmit access information is preceded by the step to, in said access control device, store said access information in a memory. 4. Method as claimed in patent claim 2, at which the step to transmit access information to the second unit is initiated by the access control device. 5. Method as claimed in patent claim 2, at which the step to transmit access information is preceded by the step to transmit an access request (7) from the second unit to said access control device, which access request includes information about said first identity and said second identity. 6. Method as claimed in patent claim 2, at which said access control device is administered/managed by a certified authority (CA) . 7. Method as claimed in patent claim 2, at which said second unit communicates with the access control device via a carrier in a wireless cellular communication network. 8. Method as claimed in patent claim 2, at which said second unit communicates with the access control device via a wire/cable based communication network. 9. Access control device (4) in a radio communication system (3) with short range, at which a first unit (1) includes a first communication device with a first identity (y) , and a second (2) unit includes a second communication device with a second identity (x) , which communication devices are arranged for communication in said radio communication system, c h a r a c t e r i z e d in storing device/devices for storing of access information related to communication between said first and second unit in said radio communication system, third communication devices, connected to said storing device/devices, arranged for transmission (6) of said access information to the second unit. 10. Access control device as claimed in patent claim 9, at which said second unit further includes fourth communication device, and where said third and fourth communication devices are arranged for communication via a secure connection on a carrier in a second communication system (5) . 11. Access control device as claimed in patent claim 10, at which said third communication device is arranged to receive an access request (7) from said second unit, which access request includes said first and second identity, and to transmit said access information depending on the access request . 12. Access control device as claimed in patent claim 11, including processing/action devices connected to said storing device and third communication device, arranged to derive said access information in said storing device depending on said access request. 13. Access control device as claimed in patent claim 10, including processing/action devices connected to said storing device and third communication device, arranged to derive said access information in said storing device and to initiate transmission of the access information depending on preset parameters. 14. Access control device as claimed in patent claim 13, where said parameters include preset time intervals. 15. Access control device as claimed in patent claim 13, where said parameters include information about new stored access information. 16. Access control device as claimed in patent claim 10, at which said second communication system is a wireless cellular communication network. 17. Access control device as claimed in patent claim 10, at which said second communication system is a wire/cable-based communication network.

Inventors: ANDERSIN MIKAEL, STAF OSKAR, STRANDH MAGNUS, ANDERSIN, MIKAEL, STAF, OSKAR, STRANDH, MAGNUS
Applicants: TELIA AB, TELIA AB (PUBL)
Application year: 2001
Main classification: H04Q7
IPC codes: H04L12, H04W12