Method and devices for specifying the quality of service in a transmission of data packets
A service class for a transmission of data packets between a service entity and a user equipment is selected from a plurality of service classes. A first transmission context is established between a core network node and the user equipment, and is associated with a first set of attributes for defining a first quality of service for the transmission. Furthermore, a second transmission context is established between an access node and the user equipment, and is associated with a second set of attributes for defining a second quality of service for the transmission. The selected service class determines the first set of attributes by a first unique mapping function performed in the core network node and the selected service class determines the second set of attributes by a second unique mapping function performed in the access node.
1. A control device for specifying a quality of service in a transmission of data packets between a service entity and a user equipment over a mobile network comprising a core network node and an access node which are adapted to control the handling of the data packets sent between the service entity and the user equipment, wherein the control device comprises:
at least one microprocessor;
a non-transitory computer-readable storage medium, coupled to the at least one microprocessor, containing computer-readable instructions executable by said microprocessor whereby said control device is configured to:
receive a numerical ID value for a transmission context to be established with the user equipment, wherein the numerical ID value encodes a selected service class, wherein the selected service class was selected for the transmission context prior to receipt of the numerical ID value and was selected from a plurality of service classes preconfigured in the mobile network,
determine the selected service class from the received numerical ID value,
determine a further set of attributes for the selected service class, using a unique mapping function that maps a set of attributes for the determined selected service class to said further set of attributes of a plurality of preconfigured further sets of attributes, and
establish the transmission context with the user equipment according to the further set of attributes for defining a quality of service for an exchange of the data packets with the user equipment in the transmission.
2. The control device of claim 1 , wherein a request to establish the transmission context comprises both an indication for the selected service class and attributes relating to a subscriber, and wherein the attributes relating to the subscriber are used to perform user differentiation.
3. The control device of claim 2 , wherein user differentiation is performed by a reservation of service classes to different user groups and by an attribution of users to the service classes depending on their subscription alternatively to or in consideration of a requested quality of service.
4. The control device of claim 1 , wherein the encoded selected service class is transparently forwarded.
5. The control device of claim 1 , wherein a packet filter filters a stream of data packets with one or potentially multiple flows or service classes of potentially multiple applications or service components into separate streams, such that packets are associated with a particular service class.
6. The control device of claim 5 , wherein the packet filter is defined by a Traffic Flow Template (TFT) that applies to uplink or downlink packet streams or a Policy charging and Control (PCC) downlink filter.
7. The control device of claim 1 , wherein in a non-access stratum between the user equipment and a core network, a first tunnel is represented by a Packet Data Protocol (PDP) context while in an access stratum between the user equipment and a radio access network a second tunnel is represented by a radio bearer.
8. The control device of claim 7 , wherein the quality of service for a flow in the first tunnel and the second tunnel is specified by the service class that is associated with each Packet Data Protocol (PDP) context and the corresponding radio bearer, such that a one-to-one relationship between the PDP context and the radio bearer exists.
9. The control device of claim 1 , wherein the entities controlling the handling of packets, a Serving General Packet Radio Service (GPRS), Support Node (SGSN), a Gateway General Packet Radio Service (GPRS), Support Node GGSN (GGSN 1 ), or a Policy and Charging Rules Function (PCRF), are adapted to handle service classes.
10. A method performed by a control device for specifying a quality of service in a transmission of data packets between a service entity and a user equipment over a mobile network comprising a core network node and an access node which are adapted to control the handling of the data packets sent between the service entity and the user equipment, wherein the method comprises:
receiving a numerical ID value for a transmission context to be established with the user equipment, wherein the numerical ID value encodes a selected service class, wherein the selected service class was selected for the transmission context prior to receipt of the numerical ID value and was selected from a plurality of service classes preconfigured in the mobile network,
determining the selected service class from the received numerical ID value,
determining a further set of attributes for the selected service class, using a unique mapping function that maps a set of attributes for the determined selected service class to said further set of attributes of a plurality of preconfigured further sets of attributes, and
establishing the transmission context with the user equipment according to the further set of attributes for defining a quality of service for an exchange of the data packets with the user equipment in the transmission.
11. The method of claim 10 , wherein a request to establish the transmission context comprises both an indication for the service class and attributes relating to a subscriber, and wherein the attributes relating to the subscriber are used to perform user differentiation.
12. The method of claim 11 , wherein user differentiation is performed by a reservation of service classes to different user groups and by an attribution of users to the service classes depending on their subscription alternatively to or in consideration of a requested quality of service.
13. The method of claim 10 , wherein the encoded selected service class is transparently forwarded.
14. The method of claim 10 , wherein a packet filter filters a stream of data packets with one or potentially multiple flows or service classes of potentially multiple applications or service components into separate streams, such that packets are associated with a particular service class.
15. The method of claim 14 , wherein the packet filter is defined by a Traffic Flow Template (TFT) that applies to uplink or downlink packet streams or a Policy charging and Control (PCC) downlink filter.
16. The method of claim 10 , wherein in a non-access stratum between the user equipment and a core network, a first tunnel is represented by a Packet Data Protocol (PDP) context while in an access stratum between the user equipment and a radio access network a second tunnel is represented by a radio bearer.
17. The method of claim 16 , wherein the quality of service for a flow in the first tunnel and the second tunnel is specified by the service class that is associated with each Packet Data Protocol (PDP) context and the corresponding radio bearer, such that a one-to-one relationship between the PDP context and the radio bearer exists.
18. The method of claim 10 , wherein the entities controlling the handling of packets, a Serving General Packet Radio Service (GPRS), Support Node (SGSN), a Gateway General Packet Radio Service (GPRS), Support Node GGSN (GGSN 1 ), or a Policy and Charging Rules Function (PCRF), are adapted to handle service classes.