초록 ▼

A power control method in accordance with the present invention synchronizes the transmit power levels at the base stations currently serving a mobile station and an initial transmit power level of a new target base station being added in a diversity handover situation. At the beginning of the hando

A power control method in accordance with the present invention synchronizes the transmit power levels at the base stations currently serving a mobile station and an initial transmit power level of a new target base station being added in a diversity handover situation. At the beginning of the handover, a radio network controller orders the serving base stations to measure their respective transmit powers to the mobile station. Each serving base station then measures its transmit power to the mobile station and reports the power level measurements to the radio network controller. An initial transmit power setting is determined for the target base station, and new transmit power settings are determined for the serving base stations synchronized for example to a particular time (t0). At or about synchronizing time t0,the target base station transmits to the mobile station at the initial power setting, and at or about the same time, the serving base stations preferably also adjust their transmit powers toward the new values. Alternatively, the serving base stations transmit at their respective new values at or about time t0. In a preferred embodiment of the present invention, the serving base station power adjustment is performed gradually.

대표청구항 ▼

A power control method in accordance with the present invention synchronizes the transmit power levels at the base stations currently serving a mobile station and an initial transmit power level of a new target base station being added in a diversity handover situation. At the beginning of the hando

A power control method in accordance with the present invention synchronizes the transmit power levels at the base stations currently serving a mobile station and an initial transmit power level of a new target base station being added in a diversity handover situation. At the beginning of the handover, a radio network controller orders the serving base stations to measure their respective transmit powers to the mobile station. Each serving base station then measures its transmit power to the mobile station and reports the power level measurements to the radio network controller. An initial transmit power setting is determined for the target base station, and new transmit power settings are determined for the serving base stations synchronized for example to a particular time (t0). At or about synchronizing time t0,the target base station transmits to the mobile station at the initial power setting, and at or about the same time, the serving base stations preferably also adjust their transmit powers toward the new values. Alternatively, the serving base stations transmit at their respective new values at or about time t0. In a preferred embodiment of the present invention, the serving base station power adjustment is performed gradually. esponse message; the Serving GPRS Support Node modifying the traffic characteristics message and the RESV response message to reflect constraints of the wireless link; and the Serving GPRS Support Node forwarding the modified traffic message and the modified RESV response message. 6. A method for coupling a mobile station over an air interface, having a wireless quality of service standard, to an RSVP-aware network, the network being coupled to an end terminal, the mobile station having an application that is wireless quality of service standard compliant, the network comprising an RSVP agent and a plurality of routers that are RSVP-aware, the plurality of routers including a Serving GPRS Support Node, the method comprising the steps of: the application providing an RSVP agent with the traffic characteristics that are used to generate an RSVP PATH message; sending the PATH message towards the end terminal; the plurality of routers intercepting the PATH message and installing a PATH state from the PATH message before forwarding the PATH message to the end terminal, the PATH state installed in the Serving GPRS Support Node including the mobile terminal's IP address and RSVP session information; the RSVP agent intercepting the PATH message and generating an RESV message containing Flow_Spec information; each router intercepting the RESV message and making a call admission decision based on the Flow_Spec information in the RESV message; if data flow is admitted through a particular router, reserving the sources in that particular router for the data flow; if data flow is admitted through the particular router, transmitting the RESV message to a next downstream node; if the data flow is not admitted, generating an error message; the RSVP agent in the Serving General Packet Radio Service (GPRS) Support Node receiving the RESV message; if the RESV message matches the installed PATH state, making a call admission decision based on router resources available; a translator function mapping the Flow_Spec information to an Internet Protocol bearer attribute; the translator function forwarding the mapped Flow_Spec information to a call admission controller; the call admission controller identifying the mobile station using the IP address; the call admission controller retrieving subscription information regarding the mobile station from the Serving GPRS Support Node; and making a policy-based call admission decision based on the subscription information and requested quality of service. 7. The method of claim 6 wherein the air interface is a general packet radio service standard. 8. The method of claim 6 and further including the steps of: if a new radio assignment bearer is required, the Serving GPRS Support Node sending a radio access bearer assignment message to an E-RAN resource manager; the E-RAN resource manager triggering the RAB assignment; if the RAB assignment is successful, the Serving GPRS Support Node sending a modified packet data protocol sub-context activation comprising the steps of: the Serving GPRS Support Node sending a modified packet data protocol context message to the mobile station; the Serving GPRS Support Node receiving the modified packet data protocol context response message from the mobile station; the Serving GPRS Support Node sending an updated packet data protocol context request message to a Gateway GPRS Support Node; and the Serving GPRS Support Node receiving the updated packet data protocol context response message from the Gateway GPRS Support Node; and if the modified packet data protocol sub-context activation is successful, the RSVP agent forwarding the RESV message to the next node in the path. 9. The method of claim 8 and further including the steps of: if the next node in the path is the mobile station, the mobile station sending data; and if the next node in the path is not the mobile station, generating an error message. g a new session or handoff procedure for a user equipment in a communications system having a second network connected to a first network, the method comprising the steps of: determining a first identifier from the first network indicating the location of the user equipment in the first network; providing said first identifier to an entity connected to said first network and to said second network, said entity associating a second identifier of the second network with said first identifier of said first network, the first identifier indicating the location of the user equipment in the first network and said second identifier indicating the location of the user equipment in the second network; and determining the second identifier of the second network indicating the location of the user equipment using said entity for associating said first identifier and said second identifier. 2. The method as recited in claim 1, wherein a controller obtains the first identifier of said first network, indicating the location of said user equipment in said first network, from the user equipment. 3. The method of claim 2, wherein the first identifier is a previous first identifier. 4. The method of claim 2, wherein the controller is a base station controller. 5. The method recited in claim 2, wherein the user equipment updates its stored first identifier with the first identifier sent by the network from the controller to the entity. 6. The method recited in claim 5, wherein said entity finds a correspondence between a previous first identifier from the first network and a second identifier from the second network. 7. The method recited in claim 5, wherein a plurality of first identifiers from said first network correspond to a single second identifier from said second network. 8. The method recited in claim 6, wherein said entity returns a registration reply to the controller after it has found a correspondence between said previous first identifier from the first network and a second identifier from the second network. 9. The method of claim 1, wherein the first identifier is a PZ_ID parameter and the second identifier is a RA_ID parameter. 10. The method of claim 1, wherein the first identifiers are PZ_ID and Cell-ID parameters and the second identifier is a RA_ID parameter. 11. The method recited in claim 8, wherein a PPP connection is established between the user equipment and the said entity. 12. The method recited in claim 6, wherein said entity sends an RA update request to a network element in the second network. 13. The method recited in claim 1, wherein said entity is a wireless gateway (WGW). 14. The method recited in claim 12, wherein said RA update request is sent over a standardized interface of said packet switched network. 15. The method recited in claim 14, wherein said second network is a GPRS network and said network element is a Serving GPRS Support Node (SGSN). 16. The method recited in claim 14, wherein said second network updates its second identifier indicating the location of the mobile station. 17. The method recited in claim 16, wherein said packet switched network sends a message to the gateway indicating that it has updated its identifier indicating the location of the mobile station. 18. The method of claim 1, wherein the first network is an access network and the second network is a core network. 19. The method of claim 18, wherein the access network is a cdma2000 network and the core network is a GPRS network. 20. The method of claim 1, wherein said user equipment is a mobile station. 21. The method of claim 1, wherein a DRS option in a registration request indicates when an attach procedure or handoff procedure is carried out. 22. A communications system, comprising at least: an access network; a packet switched core network; and a gateway connected between the access network and the packet switched core network, said communications system implementing a method according to claim 1 which triggers t