CA2359176A1 - Method and system for mobile ip registration at mobile station power-up - Google Patents
Method and system for mobile ip registration at mobile station power-up Download PDFInfo
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Abstract
A packet-data-capable mobile station registers its care of address with its home agent in response to the mobile station being powered up. When the mobile station powers up, it sends a message to its base station. The message can be an origination message with packet-data service option or a registration message with a new parameter. The message triggers mobile IP registration of the mobile station into a home agent of the mobile station irrespective of whether the mobile station has sent packet data after power-up or has roamed to another network from the network in which the mobile station powered up.
Description
Patent Application Docket No. P 14007CA
METHOD AND SYSTEM FOR MOBILE IP
REGISTRATION AT MOBILE STATION POWER-UP
TECHNICAL FIELD OF THE INVENTION
The present invention relates to wireless communications systems in general and, in particular, to mobile IP registration of a packet-data-capable mobile station at power-up of the mobile station.
BACKGROUND
Advancements in the fields of electronics and communications have permitted the introduction and commercialization of many new types of communication systems.
Information can be affordably communicated to locations in manners previously not possible or affordable.
The field of cellular telephony is exemplary of a communication system that has I 5 been made possible due to such advancements. Communication using a cellular telephone or other radiotelephonic system is advantageous because a fixed, wireline connection is not required between a sending station and a receiving station to permit communications to be effectuated therebetween. A cellular or other radiotelephonic communication system is therefore particularly advantageous to effectuate communications when the use of fixed or hard-wired connections would be inconvenient or impractical. Continued advancements in the field of cellular telephony, as well as other types of radiotelephonic communications, have permitted the introduction of new services and new forms of communication pursuant to already-installed cellular, and other radiotelephonic, networks.
Patent Application Docket No. P 14007CA
Proposals have been set forth to provide existing cellular, and other communication, networks with the capability of communicating packet data in which information to be transmitted between a sending station and a receiving station is formed into discrete packets of data. Individual packets of data can be sent on a communication channel from the sending station to the receiving station. Because the information is communicated by way of discrete packets, the sending station needs to utilize the channel only during the time periods required to send the discrete packets. A channel is typically, therefore, a shared channel used by a plurality of sending stations.
To communicate a packet of data to a mobile station, the packet must be addressed with an identification address of the mobile station. An Internet Protocol (IP) address is exemplary of an identification address that can be used to address packets of data that are to be relayed to the mobile station. The IP address is, of course, utilized when transmissions are made pursuant to an Internet Protocol. Many different types of services have been implemented that are effectuated by the communication of packet data according to various protocols.
The point-to-point protocol is a protocol that provides point-to-point access and enables networking over serial lines. The point-to-point protocol is the protocol used by the cdma2000 wireless communication standard for communications between, for example, mobile stations and packet-data service nodes . The cdma2000 wireless communication standard (also known as the 1 x Multi Carrier mode standard) is a third generation technology that increases data transmission rates in CDMA (code division multiple access) systems. A packet-data session between a mobile station and a packet-data service node is referred to as a point-to-point protocol session.
METHOD AND SYSTEM FOR MOBILE IP
REGISTRATION AT MOBILE STATION POWER-UP
TECHNICAL FIELD OF THE INVENTION
The present invention relates to wireless communications systems in general and, in particular, to mobile IP registration of a packet-data-capable mobile station at power-up of the mobile station.
BACKGROUND
Advancements in the fields of electronics and communications have permitted the introduction and commercialization of many new types of communication systems.
Information can be affordably communicated to locations in manners previously not possible or affordable.
The field of cellular telephony is exemplary of a communication system that has I 5 been made possible due to such advancements. Communication using a cellular telephone or other radiotelephonic system is advantageous because a fixed, wireline connection is not required between a sending station and a receiving station to permit communications to be effectuated therebetween. A cellular or other radiotelephonic communication system is therefore particularly advantageous to effectuate communications when the use of fixed or hard-wired connections would be inconvenient or impractical. Continued advancements in the field of cellular telephony, as well as other types of radiotelephonic communications, have permitted the introduction of new services and new forms of communication pursuant to already-installed cellular, and other radiotelephonic, networks.
Patent Application Docket No. P 14007CA
Proposals have been set forth to provide existing cellular, and other communication, networks with the capability of communicating packet data in which information to be transmitted between a sending station and a receiving station is formed into discrete packets of data. Individual packets of data can be sent on a communication channel from the sending station to the receiving station. Because the information is communicated by way of discrete packets, the sending station needs to utilize the channel only during the time periods required to send the discrete packets. A channel is typically, therefore, a shared channel used by a plurality of sending stations.
To communicate a packet of data to a mobile station, the packet must be addressed with an identification address of the mobile station. An Internet Protocol (IP) address is exemplary of an identification address that can be used to address packets of data that are to be relayed to the mobile station. The IP address is, of course, utilized when transmissions are made pursuant to an Internet Protocol. Many different types of services have been implemented that are effectuated by the communication of packet data according to various protocols.
The point-to-point protocol is a protocol that provides point-to-point access and enables networking over serial lines. The point-to-point protocol is the protocol used by the cdma2000 wireless communication standard for communications between, for example, mobile stations and packet-data service nodes . The cdma2000 wireless communication standard (also known as the 1 x Multi Carrier mode standard) is a third generation technology that increases data transmission rates in CDMA (code division multiple access) systems. A packet-data session between a mobile station and a packet-data service node is referred to as a point-to-point protocol session.
Patent Application Docket No. P 14007CA
A home agent is a packet-data service node on a home network of a mobile station that tunnels packet data for delivery to the mobile station when the mobile station is outside the home network. The home network of the mobile station is a network that has the same network prefix of a home address of the mobile station. The home address of the mobile station is an IP address that is assigned to the mobile station for an extended period of time and that remains unchanged regardless of where the mobile station is located.
Packet data intended for the mobile station is encapsulated and routed to a decapsulating agent, such as a foreign agent. The packet data is then decapsulated and delivered to the mobile station by the decapsulating agent. The home agent also maintains current location information for the mobile station. A tunnel is the path followed by packet data while it is encapsulated.
A foreign agent is a packet-data service node on a foreign network that provides routing services to the mobile station while the mobile station is registered with the foreign agent. A foreign network is defined as any network other than the home network. The foreign agent can detunnel and deliver to the mobile station packet data that has been tunneled toward the mobile station by the home agent. The foreign agent can also serve as a default packet-data service node for packet data sent by the mobile station.
A mobile station that is outside its home network must register a care-of address with its home agent to receive terminating packet data from the home agent.
Depending on the method of attachment of the mobile station to the network, the mobile station can either register directly with the home agent or through a foreign agent that forwards mobile IP registration information of the mobile station to the home agent. A care-of address is the termination point of a tunnel for packet data forwarded to the mobile station when the mobile station is outside its home network. The mobile station registers its care-of address Patent Application Docket No. P 14007CA
with its home agent so that packet data intended for the mobile station can reach the mobile station. A care-of address is used only when the mobile station has roamed from its home network to a foreign network. When the mobile station is in its home network, it can receive packet data from the home agent without using a care-of address.
The care-of address of the mobile station can change when network conditions change, such as, for example, when the mobile station roams from a first foreign network to a second foreign network.
A care-of address can either be a foreign-agent care-of address or a co-located care of address.. A foreign-agent care-of address is an IP address of the foreign agent and is provided to the mobile station by the foreign agent through agent advertisement or agent solicitation messages. When packet data is tunneled by the home agent to the mobile station, the foreign agent serves as the endpoint of the tunnel, and, upon receiving the tunneled packet data, decapsulates it and delivers the previously-encapsulated data to the mobile station.
A co-located care-of address is a care-of address acquired by the mobile station as a local IP address through some external means, which address the mobile station then associates with one of its own network interfaces. When the mobile station uses a co-located care-of address, the mobile station serves as the tunnel termination point and itself performs decapsulation of packet data tunneled to it. Use of a co-located care-of address allows a mobile station to function outside its home network without using a foreign agent.
Under the prior art, a packet-data-capable mobile station registers its care-of address with its home agent only when it performs an originating packet-data call or when it detects a change in its network connectivity, such as when it roams from its home network or from one foreign network to another network. Thus, under the prior art, when Patent Application Docket No. P 14007CA
a mobile station powers up in a foreign network, there is no way for the mobile station to notify its home agent of its care-of address until the mobile station performs an originating packet-data call or roams to another network. Until an originating packet call is performed from the foreign network by the mobile station or the mobile station roams to another network, terminating packet data cannot be delivered to the mobile station because the home agent does not know the care-of address of the mobile station.
There is accordingly a need for a method and system for mobile 1P registration at mobile station power-up that permits a mobile station that powers up in a foreign network to trigger mobile IP registration and receive packet data from its home agent without the mobile station being required to initiate a packet-data call or roam to another network.
SUMMARY OF THE INVENTION
A packet-data-capable mobile station registers its care-of address with its home agent in response to the mobile station being powered up. In a first embodiment, when the mobile station powers up, it sends an origination message (with packet-data-service option) to its base station. The packet-data-service option informs the network of the wish of the mobile station to obtain packet-data services for that call. Mobile IP
registration of the mobile station is triggered in response to the origination message. After the mobile station has caused its care-of address to be registered with its home agent via the mobile IP
registration, the mobile station can be reached with terminating packet data.
Tn a second embodiment of the present invention, when the mobile station powers up, it sends a registration message (with a new parameter) to its base station. The new parameter of the registration message indicates that the mobile station needs to perform mobile IP registration in addition to mobile power-up registration. Upon reception of the Patent Application Docket No. P 14007CA
registration message, the base station sends a location updating request to a serving mobile switching center. The base station adds the new parameter to the location updating request, provided the new parameter was received from the mobile station in the registration message.
Upon receipt of the location updating message, the serving mobile switching center checks for the existence of the new parameter. If the new parameter is present, the mobile switching center processes the location updating request using mechanisms used for processing mobile power-up registration. Mobile IP registration of the mobile station is triggered in response to the location updating message. If the new parameter is not present, the mobile switching center processes the location updating request as in the prior art. After the mobile station has registered its care-of address with its home agent, it is possible for terminating packet data to reach the mobile station.
A more complete understanding of the method and system of the present invention may be acquired by reference to the following Detailed Description when taken in conjunction with the accompanying Drawings wherein:
FIGURE 1 is a flow chart illustrating an algorithm for sending an origination message to trigger mobile IP registration in accordance with a first embodiment of the present invention;
FIGURE 2 is a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that has previously acquired a co-located care-of address and a home agent of the mobile station in accordance with the first embodiment of the present invention;
A home agent is a packet-data service node on a home network of a mobile station that tunnels packet data for delivery to the mobile station when the mobile station is outside the home network. The home network of the mobile station is a network that has the same network prefix of a home address of the mobile station. The home address of the mobile station is an IP address that is assigned to the mobile station for an extended period of time and that remains unchanged regardless of where the mobile station is located.
Packet data intended for the mobile station is encapsulated and routed to a decapsulating agent, such as a foreign agent. The packet data is then decapsulated and delivered to the mobile station by the decapsulating agent. The home agent also maintains current location information for the mobile station. A tunnel is the path followed by packet data while it is encapsulated.
A foreign agent is a packet-data service node on a foreign network that provides routing services to the mobile station while the mobile station is registered with the foreign agent. A foreign network is defined as any network other than the home network. The foreign agent can detunnel and deliver to the mobile station packet data that has been tunneled toward the mobile station by the home agent. The foreign agent can also serve as a default packet-data service node for packet data sent by the mobile station.
A mobile station that is outside its home network must register a care-of address with its home agent to receive terminating packet data from the home agent.
Depending on the method of attachment of the mobile station to the network, the mobile station can either register directly with the home agent or through a foreign agent that forwards mobile IP registration information of the mobile station to the home agent. A care-of address is the termination point of a tunnel for packet data forwarded to the mobile station when the mobile station is outside its home network. The mobile station registers its care-of address Patent Application Docket No. P 14007CA
with its home agent so that packet data intended for the mobile station can reach the mobile station. A care-of address is used only when the mobile station has roamed from its home network to a foreign network. When the mobile station is in its home network, it can receive packet data from the home agent without using a care-of address.
The care-of address of the mobile station can change when network conditions change, such as, for example, when the mobile station roams from a first foreign network to a second foreign network.
A care-of address can either be a foreign-agent care-of address or a co-located care of address.. A foreign-agent care-of address is an IP address of the foreign agent and is provided to the mobile station by the foreign agent through agent advertisement or agent solicitation messages. When packet data is tunneled by the home agent to the mobile station, the foreign agent serves as the endpoint of the tunnel, and, upon receiving the tunneled packet data, decapsulates it and delivers the previously-encapsulated data to the mobile station.
A co-located care-of address is a care-of address acquired by the mobile station as a local IP address through some external means, which address the mobile station then associates with one of its own network interfaces. When the mobile station uses a co-located care-of address, the mobile station serves as the tunnel termination point and itself performs decapsulation of packet data tunneled to it. Use of a co-located care-of address allows a mobile station to function outside its home network without using a foreign agent.
Under the prior art, a packet-data-capable mobile station registers its care-of address with its home agent only when it performs an originating packet-data call or when it detects a change in its network connectivity, such as when it roams from its home network or from one foreign network to another network. Thus, under the prior art, when Patent Application Docket No. P 14007CA
a mobile station powers up in a foreign network, there is no way for the mobile station to notify its home agent of its care-of address until the mobile station performs an originating packet-data call or roams to another network. Until an originating packet call is performed from the foreign network by the mobile station or the mobile station roams to another network, terminating packet data cannot be delivered to the mobile station because the home agent does not know the care-of address of the mobile station.
There is accordingly a need for a method and system for mobile 1P registration at mobile station power-up that permits a mobile station that powers up in a foreign network to trigger mobile IP registration and receive packet data from its home agent without the mobile station being required to initiate a packet-data call or roam to another network.
SUMMARY OF THE INVENTION
A packet-data-capable mobile station registers its care-of address with its home agent in response to the mobile station being powered up. In a first embodiment, when the mobile station powers up, it sends an origination message (with packet-data-service option) to its base station. The packet-data-service option informs the network of the wish of the mobile station to obtain packet-data services for that call. Mobile IP
registration of the mobile station is triggered in response to the origination message. After the mobile station has caused its care-of address to be registered with its home agent via the mobile IP
registration, the mobile station can be reached with terminating packet data.
Tn a second embodiment of the present invention, when the mobile station powers up, it sends a registration message (with a new parameter) to its base station. The new parameter of the registration message indicates that the mobile station needs to perform mobile IP registration in addition to mobile power-up registration. Upon reception of the Patent Application Docket No. P 14007CA
registration message, the base station sends a location updating request to a serving mobile switching center. The base station adds the new parameter to the location updating request, provided the new parameter was received from the mobile station in the registration message.
Upon receipt of the location updating message, the serving mobile switching center checks for the existence of the new parameter. If the new parameter is present, the mobile switching center processes the location updating request using mechanisms used for processing mobile power-up registration. Mobile IP registration of the mobile station is triggered in response to the location updating message. If the new parameter is not present, the mobile switching center processes the location updating request as in the prior art. After the mobile station has registered its care-of address with its home agent, it is possible for terminating packet data to reach the mobile station.
A more complete understanding of the method and system of the present invention may be acquired by reference to the following Detailed Description when taken in conjunction with the accompanying Drawings wherein:
FIGURE 1 is a flow chart illustrating an algorithm for sending an origination message to trigger mobile IP registration in accordance with a first embodiment of the present invention;
FIGURE 2 is a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that has previously acquired a co-located care-of address and a home agent of the mobile station in accordance with the first embodiment of the present invention;
Patent Application Docket No. P 14007CA
FIGURE 3 is a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign-agent care-of address and a home agent of the mobile station in accordance with the first embodiment of the present invention;
FIGURE 4 is a flow chart illustrating an algorithm for sending a registration message to trigger mobile IP registration in accordance with a second embodiment of the present invention; and FIGURE 5 is a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign-agent care-of address and a home agent of the mobile station in accordance with the second embodiment of the present mvent~on.
To facilitate understanding, identical reference numerals have been used in the drawings, where possible, to designate identical elements.
FIGURE 3 is a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign-agent care-of address and a home agent of the mobile station in accordance with the first embodiment of the present invention;
FIGURE 4 is a flow chart illustrating an algorithm for sending a registration message to trigger mobile IP registration in accordance with a second embodiment of the present invention; and FIGURE 5 is a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign-agent care-of address and a home agent of the mobile station in accordance with the second embodiment of the present mvent~on.
To facilitate understanding, identical reference numerals have been used in the drawings, where possible, to designate identical elements.
Patent Application Docket No. P 14007CA
DETAILED DESCRIPTION OF EMBODIMENTS
Reference is now made to FIGURE I, wherein there is shown a flow chart illustrating an algorithm for sending an origination message to trigger mobile IP
registration in accordance with a first embodiment of the present invention.
FIG. 1 illustrates a routine 100 that begins at step 1CI1, at which step a mobile station (MS) powers up. Thereafter, execution proceeds to step 102, wherein a determination is made whether the mobile station is packet-data-capable. If it is determined at step 102 that the mobile station is packet-data-capable, execution proceeds to step 103, wherein the mobile station sends an origination message with a packet-data-service option to a base station/packet-control ftmction(BS/PCF). The origination message is a request from the mobile station to its base stationpacket-control function for origv~ation of a call without payload. The packet-data-service option included in the origination message is a parameter that indicates that the mobile station wishes to obtain packet-data services for that call.
If it is determined at step l02 that the mobile station is not packet-data-capable, execution proceeds to step 104, wherein known procedures for mobile power-up registration are employed and packet-data services are not provided to the mobile station.
Of course, if the mobile station is not packet-data-capable, there is no need for the mobile station to attempt to receive packet data. From step 103, execution proceeds to step 105, wherein known procedures for mobile IP registration are used.
It can thus be seen from FIG. 1 that a packet-data-capable mobile station, upon powering-up, sends an origination message, with packet-data-service option, to its base station/packet control function. The packet-data-service option included in the origination message informs the network that the mobile station wishes to obtain packet-data services Patent Application Docket No. P 14007CA
for that call. This wish of the mobile station to receive packet-data services is communicated automatically in response to power-up of the mobile station and regardless of whether the mobile station has packet data to transmit at power-up or the mobile station has roamed to another network. The origination message with packet-data service option triggers mobile IP registration of the mobile station. After mobile IP
registration has been completed, the mobile station can receive packet data.
Reference is now made to FIGURE 2, wherein is shown a messaging diagram illustrating messages flowing between a packet-data capable mobile station in a foreign network has previously acquired a co-located care-of address and a home agent of the mobile station in accordance with the first embodiment of the present invention. Use of a co-located care-of address allows the mobile station (MS) 201 to function without a foreign agent. FIGURE 2 depicts a mobile station (MS) 201, a base station/packet-control function (BS/PCF) 202, a mobile switching center (MSC) 203, and packet-data service node (PDSN) 204, among which various messages flow in order effect mobile IP
registration of the mobile station 201.
The packet-data-capable mobile station 201, which is located in a foreign network, powers up in the foreign network as described with respect to FIG. 1 and, in response to powering up, sends a registration message 205 to the base station/packet-control function 202. The registration message 205 serves as a request by the mobile station to the base station/packet-control function202 for registration. The packet control function (PCF) is most typically co-located with the BS. The base station/packet-control function 202 represents a BS and a PCF as a single entity, even though they need not be co-located. A
radio network (RN) comprises the BS and the PCF. 1n response to the registration message 205, the base station/packet-control function 202 sends a location updating Patent Application Docket No. P 14007CA
request 206 to the mobile switching center 203. The location updating request 206 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 for the mobile switching center to update the location of the mobile station 201.
Next, the packet-data-capable mobile station 201 sends an origination message with packet-data-service option 103 to the base station/packet-control funetion202. The origination message 103 sent by the mobile station 201 is a request from the mobile station to the base station/packet-control function 202 for origination of a call without payload.
The packet-data-service option included in the origination message is a parameter that indicates that the mobile station wishes to obtain packet-data services for that call.
Next, u1 response to the location updating request 206, the mobile switching center 203 sends a location updating accept message 207 to the base station/packet-control function 202. The location updating accept message 207 is a response from the mobile switching center 203 to the base station/packet-control function 202 that indicates that the location updating request 206 has been processed. Next, in response to the registration l5 message 205, the base station/packet-control function 202 sends a registration accepted order message 208 to the mobile station 201. The registration accepted order message 208 is a response from the base station/packet-control function to the mobile station 201 that indicates that the registration message 205 has been processed.
In response to the origination message with packet-data-service option 103, the base station/packet-control function 202 returns a BS ACK order message 209 to the mobile station 201. The BS ACK order message 209 acknowledges receipt of the origination message by the base station/packet-control function 202. In further response to the origination message 103 of the mobile station 201, the base station/packet-control function 202 sends a connection management (CM) service request message 210 to the Patent Application Docket No. P 14007CA
mobile switching center 203. The CM service request message 210 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 that radio resources be allocated for the mobile station 201.
In response to the CM service request message 210 by the base station/packet-control function 202, the mobile switching center 203 sends an assignment request message 21 1 to the base station/packet-control function 202, which message requests that the base station/packet-control function 202 allocate radio resources for the mobile station 201. In response to the assignment request message 21 l, the base station/packet-control function 202 sets up a traffic channel (TCH) 212 between the base station/packet-control function 202 and the mobile station 201. Setup of the traffic channel 212 creates a traffic channel connection between the mobile station 201 and the base station/packet-control function 202 and also results in establishment of a RN-packet-data-service node (R-P) link 213 between the base station/packet-control function 202 and the packet-data service node 204, the packet-data service node 204 being a home agent of the mobile station 201. The R-P link 213 is a logical connection over an R-P interface for a particular point-to-point protocol session. Establishment of the R-P link 213 creates a logical connection between the PCF portion of the base station/packet-control fimction 202 and the packet-data service node 204.
Next, the base station/packet-control function 202 sends an assignment complete message 214 to the mobile switching center 203. The assignment complete message by the base station/packet-control function 202 notifies the mobile switching center 203 that the traffic channel 212 between the mobile station 201 and the base station/packet-control function 202 has been established. Next, a point-to-point protocol (PPP) connection 215 is established between the mobile station 201 and the packet-data service node 204.
Patent Application Docket No. P 14007CA
Establishment of the point-to-point protocol connection 215 is at a link layer level between the mobile station 201 and the packet-data service node 204. The point-to-point protocol connection 215 allows mobile IP registration to take place.
Following establishment of the point-to-point protocol connection 215, the packet-s data service node 204 sends an agent advertisement message 216 to the mobile station 201, which message is sent by the packet-data service node 204 on the link layer level to advertise its services, including its IP address. The mobile station 201 could alternatively send an agent solicitation message (not shown) to the packet-data service node 204, which message is well-known in the art.
Next, the mobile station 201 submits a mobile IP registration request 217 to the packet-data service node 204. The mobile IP registration request 217 from the mobile station 201 requests that the packet-data service node 204 perform mobile 1P
registration of the mobile station 201 by registering a co-located care-of address of the mobile station 201 into the packet-data service node 204, the co-located care-of address of the mobile station 20l being included in the mobile IP registration request 217 and having been previously acquired by the mobile station 201. Next, the packet-data service node 204 sends a mobile IP registration reply 218 to the mobile station 201. The mobile IP
registration reply 218 serves as an indication by the packet-data service node 204 to the mobile station 201 of the result of the mobile IP registration request 217 of the mobile station 201.
1n the event that the mobile station 201 powers up in its home network rather than its foreign network and therefore is in an area served by the packet-data service node 204, which is the home agent of the mobile station 201, upon receipt of the agent advertisement message 216 from the packet-data service node 204, the mobile station 201 detects that it Patent Application Docket No. P 14007CA
has received the agent advertisement message from its own home agent, which is the packet-data service node 204, and the mobile station 201de-registers its care-of address in the packet-data service node 204. If the mobile station 201 is in its home network, packet data received by the mobile station 201 can be sent directly in an unencapsulated form to the IP address of the mobile station 201 by the packet-data service node 204.
There is therefore no need for a care-of address.
It can thus be seen from FIG. 2 that when the mobile station 201 sends a registration message 205 and an origination message 103 in response to the mobile station 201 powering up, a sequence of events is triggered that results in registration of the care-of address of the mobile station 201, which is a co-located care-of address, in the home agent.
The origination message 103 results in a call without payload by the mobile station 201.
Therefore, upon power-up, the mobile station 201 can receive terminating packet data via its co-located care-of address. Even though FIG. 2 describes a scenario in which the mobile station 201 has previously acquired a co-located care-of address, much of the messaging of FIG. 2 can be employed by a mobile station that uses a foreign agent rather than an acquired co-located care-of address. 1n such a case, the messages would be virtually identical to the messages described with respect to FIG. 2, except that messages must be exchanged between the foreign agent and the home agent to effect the mobile IP
registration. FIGURE 3 illustrates this scenario.
Reference is now made to FIGURE 3, wherein is shown a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign-agent care-of address and the home agent of the mobile station in accordance with the first embodiment of the present invention. Shown in FIGURE 3 are the mobile station 201, the base station/packet-control function 202, the mobile switching Patent Application Docket No. P 14007CA
center 203, a packet-data service node 301, a foreign authentication, authorization, and accounting node (FAAA) 302, a home authentication, authorization, and accounting node (HAAA) 303, and the packet-data service node (PDSN) 204.
The packet-data-capable mobile station 201, which is located in a foreign network, powers up in the foreign network as described with respect to FIG.1 and, in response to powering up, sends the registration message 205 to the base station/packet-control function 202. The registration message 205 serves as a request by the mobile station to the base station/packet-control function202 for registration. The packet control function (PCF) is most typically co-located with the BS. The base station/packet-control function 202 represents a BS and a PCF as a single entity, even though they need not be co-located. A
radio network (RN) comprises the BS and the PCF. In response to the registration message 205, the base station/packet-control function 202 sends the location updating request 206 to the mobile switching center 203. The location updating request 206 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 for the mobile switching center to update the location of the mobile station 201.
Next, the packet-data-capable mobile station 201 sends the origination message with packet-data-service option 103 to the base station/packet-control function 202. The origination message 103 sent by the mobile station 201 is a request from the mobile station 201 to the base station/packet-control function 202 for origination of a call without payload. The packet-data-service option included in the origination message is a parameter that indicates that the mobile station 201 wishes to obtain packet-data services for that call. Next, in response to the location updating request 206, the mobile switching center 203 sends the location updating accept message 207 to the base station/packet-control function 202. The location updating accept message 207 is a response from the l4 Patent Application Docket No. P 14007CA
mobile switching center 203 to the base station/packet-control function 202 that indicates that the location updating request 206 has been processed. Next, in response to the registration message 205, the base station/packet-control function 202 sends the registration accepted order message 208 to the mobile station 201. The registration accepted order message 208 is a response from the base station/packet-control function to the mobile station 201 that indicates that the registration message 205 has been processed.
In response to the origination message with packet-data-service option 103, the base station/packet-control function 202 returns the BS ACK order message 209 to the mobile station 201. The BS ACK order message 209 acknowledges receipt of the origination message 103 by the base station/packet-control function 202. In further response to the origination message 103 of the mobile station 201, the base station/packet-control function 202 sends the connection management (CM) service request message 210 to the mobile switching center 203. The CM service request message 210 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 that radio resources be allocated for the mobile station 201.
In response to the CM service request message 2l0 by the base station/packet-control function 202, the mobile switching center 203 sends the assignment request message 211 to the base station/packet-control function 202, which message requests that the base station/packet-control function 202 allocate radio resources for the mobile station 201. In response to the assignment request message 211, the base station/packet-control function 202 sets up the traffic channel (TCH) 212 between the base station/packet-control function 202 and the mobile station 201. Setup of the traffic channel (TCH) 212 between the mobile station 201 and the base station/packet-control function 202 creates a traffic channel connection between the mobile station 201 and the base station/packet-control l5 Patent Application Docket No. P 14007CA
function 202 and also results in establishment of the R-P link 213 between the base station/packet-control function and a packet-data service node 301, the packet-data service node 301 being a foreign agent of the mobile station 201. The R-P link 213 is a logical connection over the R-P interface for a particular point-to-point protocol session.
Establishment of the R-P link 213 creates a logical connection between the PCF
portion of the base station/packet-control function 202 and the packet-data service node 301.
Next, the base station/packet-control function 202 sends the assignment complete message 214 to the mobile switching center 203. The assignment complete message 214 by the base station/packet-control function 202 notifies the mobile switching center 203 that the traffic channel 212 between the mobile station 201 and the base station/packet-control function 202 has been established. Next, the point-to-point protocol connection 215 is established between the mobile station 201 and the packet-data service node 301.
Establishment of the point-to-point protocol connection 215 is at a link layer level between the mobile station 201 and the packet-data service node 301. The point-to-point protocol connection 215 allows mobile IP registration to take place.
Following establishment of the point-to-point protocol connection 215, the packet-data service node 301 sends the agent advertisement message 216 to the mobile station 201, which message is sent by the packet-data service node 301 on the link layer to advertise its services, including its availability for use by the mobile station 201 as a foreign-agent care-of address. The mobile station 201 could alternatively send an agent solicitation message (not shown) to the packet-data service node 301, which message is well-known in the art.
Next, the mobile station 201 submits a mobile IP registration request 304 to the packet-data service node 301. The mobile IP registration request 304 from the mobile Patent Application Docket No. P 14007CA
station 201 requests that the packet-data service node 301 perform mobile IP
registration of the mobile station 201 by registering the IP address of the packet-data service node 301 as the foreign-agent care-of address of the mobile station 201 into the packet-data service node 204. Next, the packet-data service node 301 engages in authentication 305 of the mobile station 201 into the home network of the mobile station 201 by initiating messaging between the packet-data service node 301, the foreign authentication, authorization, and accounting node 302, and the home authentication, authorization, and accounting node 303. Following authentication 305 of the mobile station 201 with the home network of the mobile station 201, the packet-data service node 301 forwards a mobile IP registration request 306 to the packet-data service node 204, which is the home agent of the mobile station 201. In response to the mobile IP registration request 306, the packet-data service node 204 sends a mobile IP registration reply 307 to the PDSN 301.
The packet-data service node 301 then forwards a mobile IP registration reply 308 to the mobile station 201. The mobile 1P registration reply 308 serves as an indication by the I S packet-data service node 301 to the mobile station 201 of the result of the mobile IP
registration request 304 of the mobile station 201.
In the event that the mobile station 20l powers up in its home network rather than in a foreign network and therefore is in an area served by the packet-data service node 204, which is the home agent of the mobile station 201, upon receipt of the agent advertisement message 216 from the packet-data service node 204, the mobile station 20l de-registers its care-of address in the packet-data service node 204. 1f the mobile station 201 is in its home network, packet data received by the mobile station 201 can be sent directly to the IP
address of the mobile station 201 by the packet-data service node 204. There is therefore no need for a care-of address.
Patent Application Docket No. P 14007CA
It can thus be seen from FIG. 3 that when the mobile station 201 sends a registration message and an origination message 103 in response to the mobile station 201 powering up, a sequence of events is triggered that results in registration of the foreign-agent care-of address of the mobile station 201 in the home agent of the mobile station 201. Therefore, upon power-up, the mobile station 201 can receive terminating packet data via the packet-data service node 301, which provides the foreign-agent care-of address of the mobile station 201. The messaging of FIG. 3 illustrates messaging that can be employed by a mobile station that uses a foreign agent rather than acquiring a co-located care-of address.
Reference is now made to FIGURE 4, wherein is shown a flow chart illustrating an algorithm for sending a registration message to trigger mobile IP registration in accordance with a second embodiment of the present invention . A routine 400 begins at step 101, wherein the mobile station 201 powers up. From step 101, execution proceeds to step 102, wherein a determination is made whether the mobile station 201 is packet-data-capable. If it is determined at step 102 that the mobile station 201 is packet-data-capable, execution proceeds to step 401. At step 401, the mobile station 201 sends a registration message containing a new parameter to the base station/packet-control function 202.
The registration message 401 serves as a request by the mobile station 201 to the base station/packet-control function 202 for mobile power-up registration of the mobile station 201. The new parameter indicates that the mobile station 201 needs to perform mobile IP
registration as well as mobile power-up registration. If, at step 102, it is determined that the mobile station 201 is not packet-data-capable, execution proceeds to step 104. At step 104, known procedures are used for mobile power-up registration. Of course, if the mobile Patent Application Docket No. P 14007CA
station 201 is not packet-data capable, there is no need for the mobile station 201 to attempt to receive packet data.
From step 401, execution proceeds to step 402, wherein the base station/packet control function 202 sends a location updating message with the new parameter to the mobile switching center 203. From step 402, execution proceeds to step 403, wherein a determination is made whether the new parameter is present in the location updating request 402. If it is determined at step 403 that the new parameter is present in the location updating request 402, execution proceeds to step 404, wherein the mobile switching center 203 processes the location updating request 402 using known procedures for mobile power-up registration. If it is determined at step 403 that the new parameter is not present in the location updating request 402, execution proceeds to step 405, wherein the mobile switching center 203 uses known procedures for mobile power-up registration and mobile IP registration is not performed. If the new parameter is not present in the location updating request 402, the mobile station 201 will not be able to receive terminating packet data until the mobile station 201 either sends packet data or roams as described hereinabove.
From step 404, execution proceeds to step 406, wherein the mobile switching center 203 sends an assignment request message 406 to the base station/packet-control function 202. The assignment request message 406 serves as a request by the mobile switching center 203 to the base station/packet-control function 202 to allocate radio resources to the mobile station 201. From step 406, execution proceeds to step 407, wherein known procedures for mobile IP registration are used.
1t can thus be seen from FIG. 4 that a packet-data-capable mobile station, upon powering-up, sends a registration message 401 with a new parameter to its base Patent Application Docket No. P 14007CA
station/packet control function. The new parameter included in the registration message 401 informs the network that the mobile station needs to perform mobile IP
registration as well as mobile power-up registration. This need of the mobile station to perform mobile IP registration is communicated automatically in response to power-up of the mobile station and regardless of whether the mobile station has packet data to transmit at power-up or has roamed to another network. The registration message 401 with new parameter triggers mobile IP registration of the mobile station 201. After mobile 1P
registration has been completed, the mobile station 201 can receive packet data.
Reference is now made to FIGURE 5, wherein is shown a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign agent care-of address and the home agent of the mobile station in accordance with the second embodiment of the present invention. On power-up, the mobile station 201 sends the registration message 401 containing the new parameter to the base station/packet-control function 202 as described with respect to FIG. 4.
The new IS parameter indicates the need of the mobile station 201 to perform mobile IP
registration as well as mobile power-up registration. In response to the registration message 401, the base station/packet-control function 202 sends the location updating request 402 containing the new parameter to the mobile switching center 203. The location updating request 402 serves as a request from the base station/packet-control function 202 to the mobile switching center 203 to update the location of the mobile station 201.
The mobile switching center 203 responds to the location updating request 402 by sending the location updating accept message 207. The location updating accept message 207 is a response from the mobile switching center 203 to the base station/packet-control function 202 that indicates that the location updating request 402 has been processed. 1n Patent Application Docket No. P 14007CA
response to the registration message 401, the base station/packet-control function 202 sends the registration accepted order message 208, which is a response from the base station/packet-control fiznction 202 to the mobile station 201 that indicates that the registration message 401 has been processed. In further response to the location updating request 402 and the new parameter, the mobile switching center 203 sends the assignment request message 211 to the base station/packet-control function 202, which requests that radio resources be allocated to the mobile station 201.
Next, the traffic channel 212 is set up between the mobile station 201 and the base station/packet-control function 202, and the R-P link 213 is established between the base station/packet-control function 202 and the packet-data service node 301, the packet-data service node 301 being a foreign agent of the mobile station 201. The traffic channel 212 setup creates a traffic channel connection between the base station/packet-control function 202 and the mobile station 201. The R-P link 213 is a logical connection over the R-P
interface for a particular point-to-point protocol session. Establishment of the R-P link 213 creates a logical connection between the PCF portion of the base station/packet-control function 202 and the packet-data service node 301. Next, the base station/packet-control function 202 sends the assignment complete message 214 to the mobile switching center 203. The assignment complete message by the base station/packet-control function 202 notifies the mobile switching center 203 that the traffic channel 212 between the mobile station 201 and the base station/packet-control function 202 has been established.
Next, the point-to-point protocol (PPP) connection 215 is established between the mobile station 201 and the packet-data service node 301. Establishment of the point-to-point protocol connection 215 is at a link layer level between the mobile station 201 and the Patent Application Docket No. P 14007CA
packet-data service node 301. The point-to-point protocol connection 215 allows mobile IP registration to take place.
Next, the packet-data service node 301 sends the agent advertisement message containing the IP address of the packet-data service node 301, the IP address of the packet s data service node 301 being the foreign-agent care-of address of the mobile station 201.
The agent advertisement message 216 is sent by the packet-data service node 301 on the link layer and is used to allow the packet-data service node 301 to advertise its services, such as its care-of address. The mobile station 201 can alternatively send an agent solicitation message (not shown) to the packet-data service node 301, which message is well-known in the art.
In response to the agent advertisement message 216, the mobile station 201 sends the mobile IP registration request 304 to the packet-data service node 301, which message includes the foreign-agent care-of address of the packet-data service node 301. The mobile IP registration request 304 requests that the packet-data service node 301 perform mobile IP registration of the IP address of the packet-data service node 301 as the foreign-agent care-of address of the mobile station 201.
Next, the packet-data service node 301 engages in authentication 305 of the mobile station 20l into the home network of the mobile station 201 by initiating messaging between the packet-data service node 301, the foreign authentication, authorization, and accounting node (FAAA) 302, and the home authentication, authorization, and accounting node (HAAA) 303. Following authentication 305 of the mobile station 201 into the home network of the mobile station 201, the packet-data service node 301 forwards the mobile IP registration request 306 to the packet-data service node 204, which is the home agent of the mobile station 201. In response to the mobile IP registration request 306 by the packet-Patent Application Docket No. P 14007CA
data service node 301, the packet-data service node 204 sends the mobile IP
registration reply 307 to the packet-data service node 301. The packet-data service node 301 then forwards the mobile IP registration reply 3()8 to the mobile station 201. The mobile IP
registration reply 308 serves as an indication by the packet-data service node 301 of the result of the mobile IP registration request 304 of the mobile station 201.
In the event that the mobile station 201 powers up in the home network of the mobile station 201 rather than in a foreign network and therefore is in an area served by the packet-data service node 204, which is the home agent of the mobile station 201, upon receipt of the agent advertisement message 216 from the packet-data service node 204, the mobile station 201 de-registers its care-of address in the packet-data service node 204. If the mobile station 201 is in its home network, packet data received by the mobile station 201 can be sent directly to the IP address of the mobile station 20l by the packet-data service node 204. There is therefore no need for a care-of address.
It can thus be seen from FIG. 5 that when the mobile station 201 sends the I S registration message 40l in response to the mobile station 20l powering up, a sequence of events is triggered that results in registration of the foreign-agent care-of address into the home agent. The foreign-agent care-of address is the IP address of the packet-data service node 301. Therefore, upon power-up, the mobile station 201 can receive terminating packet-data via the foreign-agent care-of address.
Although preferred embodiments of the method and system of the present invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications, and Patent Application Docket No. P14007CA
substitutions without departing from the spirit of the invention as set forth and defined by the following claims.
DETAILED DESCRIPTION OF EMBODIMENTS
Reference is now made to FIGURE I, wherein there is shown a flow chart illustrating an algorithm for sending an origination message to trigger mobile IP
registration in accordance with a first embodiment of the present invention.
FIG. 1 illustrates a routine 100 that begins at step 1CI1, at which step a mobile station (MS) powers up. Thereafter, execution proceeds to step 102, wherein a determination is made whether the mobile station is packet-data-capable. If it is determined at step 102 that the mobile station is packet-data-capable, execution proceeds to step 103, wherein the mobile station sends an origination message with a packet-data-service option to a base station/packet-control ftmction(BS/PCF). The origination message is a request from the mobile station to its base stationpacket-control function for origv~ation of a call without payload. The packet-data-service option included in the origination message is a parameter that indicates that the mobile station wishes to obtain packet-data services for that call.
If it is determined at step l02 that the mobile station is not packet-data-capable, execution proceeds to step 104, wherein known procedures for mobile power-up registration are employed and packet-data services are not provided to the mobile station.
Of course, if the mobile station is not packet-data-capable, there is no need for the mobile station to attempt to receive packet data. From step 103, execution proceeds to step 105, wherein known procedures for mobile IP registration are used.
It can thus be seen from FIG. 1 that a packet-data-capable mobile station, upon powering-up, sends an origination message, with packet-data-service option, to its base station/packet control function. The packet-data-service option included in the origination message informs the network that the mobile station wishes to obtain packet-data services Patent Application Docket No. P 14007CA
for that call. This wish of the mobile station to receive packet-data services is communicated automatically in response to power-up of the mobile station and regardless of whether the mobile station has packet data to transmit at power-up or the mobile station has roamed to another network. The origination message with packet-data service option triggers mobile IP registration of the mobile station. After mobile IP
registration has been completed, the mobile station can receive packet data.
Reference is now made to FIGURE 2, wherein is shown a messaging diagram illustrating messages flowing between a packet-data capable mobile station in a foreign network has previously acquired a co-located care-of address and a home agent of the mobile station in accordance with the first embodiment of the present invention. Use of a co-located care-of address allows the mobile station (MS) 201 to function without a foreign agent. FIGURE 2 depicts a mobile station (MS) 201, a base station/packet-control function (BS/PCF) 202, a mobile switching center (MSC) 203, and packet-data service node (PDSN) 204, among which various messages flow in order effect mobile IP
registration of the mobile station 201.
The packet-data-capable mobile station 201, which is located in a foreign network, powers up in the foreign network as described with respect to FIG. 1 and, in response to powering up, sends a registration message 205 to the base station/packet-control function 202. The registration message 205 serves as a request by the mobile station to the base station/packet-control function202 for registration. The packet control function (PCF) is most typically co-located with the BS. The base station/packet-control function 202 represents a BS and a PCF as a single entity, even though they need not be co-located. A
radio network (RN) comprises the BS and the PCF. 1n response to the registration message 205, the base station/packet-control function 202 sends a location updating Patent Application Docket No. P 14007CA
request 206 to the mobile switching center 203. The location updating request 206 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 for the mobile switching center to update the location of the mobile station 201.
Next, the packet-data-capable mobile station 201 sends an origination message with packet-data-service option 103 to the base station/packet-control funetion202. The origination message 103 sent by the mobile station 201 is a request from the mobile station to the base station/packet-control function 202 for origination of a call without payload.
The packet-data-service option included in the origination message is a parameter that indicates that the mobile station wishes to obtain packet-data services for that call.
Next, u1 response to the location updating request 206, the mobile switching center 203 sends a location updating accept message 207 to the base station/packet-control function 202. The location updating accept message 207 is a response from the mobile switching center 203 to the base station/packet-control function 202 that indicates that the location updating request 206 has been processed. Next, in response to the registration l5 message 205, the base station/packet-control function 202 sends a registration accepted order message 208 to the mobile station 201. The registration accepted order message 208 is a response from the base station/packet-control function to the mobile station 201 that indicates that the registration message 205 has been processed.
In response to the origination message with packet-data-service option 103, the base station/packet-control function 202 returns a BS ACK order message 209 to the mobile station 201. The BS ACK order message 209 acknowledges receipt of the origination message by the base station/packet-control function 202. In further response to the origination message 103 of the mobile station 201, the base station/packet-control function 202 sends a connection management (CM) service request message 210 to the Patent Application Docket No. P 14007CA
mobile switching center 203. The CM service request message 210 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 that radio resources be allocated for the mobile station 201.
In response to the CM service request message 210 by the base station/packet-control function 202, the mobile switching center 203 sends an assignment request message 21 1 to the base station/packet-control function 202, which message requests that the base station/packet-control function 202 allocate radio resources for the mobile station 201. In response to the assignment request message 21 l, the base station/packet-control function 202 sets up a traffic channel (TCH) 212 between the base station/packet-control function 202 and the mobile station 201. Setup of the traffic channel 212 creates a traffic channel connection between the mobile station 201 and the base station/packet-control function 202 and also results in establishment of a RN-packet-data-service node (R-P) link 213 between the base station/packet-control function 202 and the packet-data service node 204, the packet-data service node 204 being a home agent of the mobile station 201. The R-P link 213 is a logical connection over an R-P interface for a particular point-to-point protocol session. Establishment of the R-P link 213 creates a logical connection between the PCF portion of the base station/packet-control fimction 202 and the packet-data service node 204.
Next, the base station/packet-control function 202 sends an assignment complete message 214 to the mobile switching center 203. The assignment complete message by the base station/packet-control function 202 notifies the mobile switching center 203 that the traffic channel 212 between the mobile station 201 and the base station/packet-control function 202 has been established. Next, a point-to-point protocol (PPP) connection 215 is established between the mobile station 201 and the packet-data service node 204.
Patent Application Docket No. P 14007CA
Establishment of the point-to-point protocol connection 215 is at a link layer level between the mobile station 201 and the packet-data service node 204. The point-to-point protocol connection 215 allows mobile IP registration to take place.
Following establishment of the point-to-point protocol connection 215, the packet-s data service node 204 sends an agent advertisement message 216 to the mobile station 201, which message is sent by the packet-data service node 204 on the link layer level to advertise its services, including its IP address. The mobile station 201 could alternatively send an agent solicitation message (not shown) to the packet-data service node 204, which message is well-known in the art.
Next, the mobile station 201 submits a mobile IP registration request 217 to the packet-data service node 204. The mobile IP registration request 217 from the mobile station 201 requests that the packet-data service node 204 perform mobile 1P
registration of the mobile station 201 by registering a co-located care-of address of the mobile station 201 into the packet-data service node 204, the co-located care-of address of the mobile station 20l being included in the mobile IP registration request 217 and having been previously acquired by the mobile station 201. Next, the packet-data service node 204 sends a mobile IP registration reply 218 to the mobile station 201. The mobile IP
registration reply 218 serves as an indication by the packet-data service node 204 to the mobile station 201 of the result of the mobile IP registration request 217 of the mobile station 201.
1n the event that the mobile station 201 powers up in its home network rather than its foreign network and therefore is in an area served by the packet-data service node 204, which is the home agent of the mobile station 201, upon receipt of the agent advertisement message 216 from the packet-data service node 204, the mobile station 201 detects that it Patent Application Docket No. P 14007CA
has received the agent advertisement message from its own home agent, which is the packet-data service node 204, and the mobile station 201de-registers its care-of address in the packet-data service node 204. If the mobile station 201 is in its home network, packet data received by the mobile station 201 can be sent directly in an unencapsulated form to the IP address of the mobile station 201 by the packet-data service node 204.
There is therefore no need for a care-of address.
It can thus be seen from FIG. 2 that when the mobile station 201 sends a registration message 205 and an origination message 103 in response to the mobile station 201 powering up, a sequence of events is triggered that results in registration of the care-of address of the mobile station 201, which is a co-located care-of address, in the home agent.
The origination message 103 results in a call without payload by the mobile station 201.
Therefore, upon power-up, the mobile station 201 can receive terminating packet data via its co-located care-of address. Even though FIG. 2 describes a scenario in which the mobile station 201 has previously acquired a co-located care-of address, much of the messaging of FIG. 2 can be employed by a mobile station that uses a foreign agent rather than an acquired co-located care-of address. 1n such a case, the messages would be virtually identical to the messages described with respect to FIG. 2, except that messages must be exchanged between the foreign agent and the home agent to effect the mobile IP
registration. FIGURE 3 illustrates this scenario.
Reference is now made to FIGURE 3, wherein is shown a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign-agent care-of address and the home agent of the mobile station in accordance with the first embodiment of the present invention. Shown in FIGURE 3 are the mobile station 201, the base station/packet-control function 202, the mobile switching Patent Application Docket No. P 14007CA
center 203, a packet-data service node 301, a foreign authentication, authorization, and accounting node (FAAA) 302, a home authentication, authorization, and accounting node (HAAA) 303, and the packet-data service node (PDSN) 204.
The packet-data-capable mobile station 201, which is located in a foreign network, powers up in the foreign network as described with respect to FIG.1 and, in response to powering up, sends the registration message 205 to the base station/packet-control function 202. The registration message 205 serves as a request by the mobile station to the base station/packet-control function202 for registration. The packet control function (PCF) is most typically co-located with the BS. The base station/packet-control function 202 represents a BS and a PCF as a single entity, even though they need not be co-located. A
radio network (RN) comprises the BS and the PCF. In response to the registration message 205, the base station/packet-control function 202 sends the location updating request 206 to the mobile switching center 203. The location updating request 206 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 for the mobile switching center to update the location of the mobile station 201.
Next, the packet-data-capable mobile station 201 sends the origination message with packet-data-service option 103 to the base station/packet-control function 202. The origination message 103 sent by the mobile station 201 is a request from the mobile station 201 to the base station/packet-control function 202 for origination of a call without payload. The packet-data-service option included in the origination message is a parameter that indicates that the mobile station 201 wishes to obtain packet-data services for that call. Next, in response to the location updating request 206, the mobile switching center 203 sends the location updating accept message 207 to the base station/packet-control function 202. The location updating accept message 207 is a response from the l4 Patent Application Docket No. P 14007CA
mobile switching center 203 to the base station/packet-control function 202 that indicates that the location updating request 206 has been processed. Next, in response to the registration message 205, the base station/packet-control function 202 sends the registration accepted order message 208 to the mobile station 201. The registration accepted order message 208 is a response from the base station/packet-control function to the mobile station 201 that indicates that the registration message 205 has been processed.
In response to the origination message with packet-data-service option 103, the base station/packet-control function 202 returns the BS ACK order message 209 to the mobile station 201. The BS ACK order message 209 acknowledges receipt of the origination message 103 by the base station/packet-control function 202. In further response to the origination message 103 of the mobile station 201, the base station/packet-control function 202 sends the connection management (CM) service request message 210 to the mobile switching center 203. The CM service request message 210 serves as a request by the base station/packet-control function 202 to the mobile switching center 203 that radio resources be allocated for the mobile station 201.
In response to the CM service request message 2l0 by the base station/packet-control function 202, the mobile switching center 203 sends the assignment request message 211 to the base station/packet-control function 202, which message requests that the base station/packet-control function 202 allocate radio resources for the mobile station 201. In response to the assignment request message 211, the base station/packet-control function 202 sets up the traffic channel (TCH) 212 between the base station/packet-control function 202 and the mobile station 201. Setup of the traffic channel (TCH) 212 between the mobile station 201 and the base station/packet-control function 202 creates a traffic channel connection between the mobile station 201 and the base station/packet-control l5 Patent Application Docket No. P 14007CA
function 202 and also results in establishment of the R-P link 213 between the base station/packet-control function and a packet-data service node 301, the packet-data service node 301 being a foreign agent of the mobile station 201. The R-P link 213 is a logical connection over the R-P interface for a particular point-to-point protocol session.
Establishment of the R-P link 213 creates a logical connection between the PCF
portion of the base station/packet-control function 202 and the packet-data service node 301.
Next, the base station/packet-control function 202 sends the assignment complete message 214 to the mobile switching center 203. The assignment complete message 214 by the base station/packet-control function 202 notifies the mobile switching center 203 that the traffic channel 212 between the mobile station 201 and the base station/packet-control function 202 has been established. Next, the point-to-point protocol connection 215 is established between the mobile station 201 and the packet-data service node 301.
Establishment of the point-to-point protocol connection 215 is at a link layer level between the mobile station 201 and the packet-data service node 301. The point-to-point protocol connection 215 allows mobile IP registration to take place.
Following establishment of the point-to-point protocol connection 215, the packet-data service node 301 sends the agent advertisement message 216 to the mobile station 201, which message is sent by the packet-data service node 301 on the link layer to advertise its services, including its availability for use by the mobile station 201 as a foreign-agent care-of address. The mobile station 201 could alternatively send an agent solicitation message (not shown) to the packet-data service node 301, which message is well-known in the art.
Next, the mobile station 201 submits a mobile IP registration request 304 to the packet-data service node 301. The mobile IP registration request 304 from the mobile Patent Application Docket No. P 14007CA
station 201 requests that the packet-data service node 301 perform mobile IP
registration of the mobile station 201 by registering the IP address of the packet-data service node 301 as the foreign-agent care-of address of the mobile station 201 into the packet-data service node 204. Next, the packet-data service node 301 engages in authentication 305 of the mobile station 201 into the home network of the mobile station 201 by initiating messaging between the packet-data service node 301, the foreign authentication, authorization, and accounting node 302, and the home authentication, authorization, and accounting node 303. Following authentication 305 of the mobile station 201 with the home network of the mobile station 201, the packet-data service node 301 forwards a mobile IP registration request 306 to the packet-data service node 204, which is the home agent of the mobile station 201. In response to the mobile IP registration request 306, the packet-data service node 204 sends a mobile IP registration reply 307 to the PDSN 301.
The packet-data service node 301 then forwards a mobile IP registration reply 308 to the mobile station 201. The mobile 1P registration reply 308 serves as an indication by the I S packet-data service node 301 to the mobile station 201 of the result of the mobile IP
registration request 304 of the mobile station 201.
In the event that the mobile station 20l powers up in its home network rather than in a foreign network and therefore is in an area served by the packet-data service node 204, which is the home agent of the mobile station 201, upon receipt of the agent advertisement message 216 from the packet-data service node 204, the mobile station 20l de-registers its care-of address in the packet-data service node 204. 1f the mobile station 201 is in its home network, packet data received by the mobile station 201 can be sent directly to the IP
address of the mobile station 201 by the packet-data service node 204. There is therefore no need for a care-of address.
Patent Application Docket No. P 14007CA
It can thus be seen from FIG. 3 that when the mobile station 201 sends a registration message and an origination message 103 in response to the mobile station 201 powering up, a sequence of events is triggered that results in registration of the foreign-agent care-of address of the mobile station 201 in the home agent of the mobile station 201. Therefore, upon power-up, the mobile station 201 can receive terminating packet data via the packet-data service node 301, which provides the foreign-agent care-of address of the mobile station 201. The messaging of FIG. 3 illustrates messaging that can be employed by a mobile station that uses a foreign agent rather than acquiring a co-located care-of address.
Reference is now made to FIGURE 4, wherein is shown a flow chart illustrating an algorithm for sending a registration message to trigger mobile IP registration in accordance with a second embodiment of the present invention . A routine 400 begins at step 101, wherein the mobile station 201 powers up. From step 101, execution proceeds to step 102, wherein a determination is made whether the mobile station 201 is packet-data-capable. If it is determined at step 102 that the mobile station 201 is packet-data-capable, execution proceeds to step 401. At step 401, the mobile station 201 sends a registration message containing a new parameter to the base station/packet-control function 202.
The registration message 401 serves as a request by the mobile station 201 to the base station/packet-control function 202 for mobile power-up registration of the mobile station 201. The new parameter indicates that the mobile station 201 needs to perform mobile IP
registration as well as mobile power-up registration. If, at step 102, it is determined that the mobile station 201 is not packet-data-capable, execution proceeds to step 104. At step 104, known procedures are used for mobile power-up registration. Of course, if the mobile Patent Application Docket No. P 14007CA
station 201 is not packet-data capable, there is no need for the mobile station 201 to attempt to receive packet data.
From step 401, execution proceeds to step 402, wherein the base station/packet control function 202 sends a location updating message with the new parameter to the mobile switching center 203. From step 402, execution proceeds to step 403, wherein a determination is made whether the new parameter is present in the location updating request 402. If it is determined at step 403 that the new parameter is present in the location updating request 402, execution proceeds to step 404, wherein the mobile switching center 203 processes the location updating request 402 using known procedures for mobile power-up registration. If it is determined at step 403 that the new parameter is not present in the location updating request 402, execution proceeds to step 405, wherein the mobile switching center 203 uses known procedures for mobile power-up registration and mobile IP registration is not performed. If the new parameter is not present in the location updating request 402, the mobile station 201 will not be able to receive terminating packet data until the mobile station 201 either sends packet data or roams as described hereinabove.
From step 404, execution proceeds to step 406, wherein the mobile switching center 203 sends an assignment request message 406 to the base station/packet-control function 202. The assignment request message 406 serves as a request by the mobile switching center 203 to the base station/packet-control function 202 to allocate radio resources to the mobile station 201. From step 406, execution proceeds to step 407, wherein known procedures for mobile IP registration are used.
1t can thus be seen from FIG. 4 that a packet-data-capable mobile station, upon powering-up, sends a registration message 401 with a new parameter to its base Patent Application Docket No. P 14007CA
station/packet control function. The new parameter included in the registration message 401 informs the network that the mobile station needs to perform mobile IP
registration as well as mobile power-up registration. This need of the mobile station to perform mobile IP registration is communicated automatically in response to power-up of the mobile station and regardless of whether the mobile station has packet data to transmit at power-up or has roamed to another network. The registration message 401 with new parameter triggers mobile IP registration of the mobile station 201. After mobile 1P
registration has been completed, the mobile station 201 can receive packet data.
Reference is now made to FIGURE 5, wherein is shown a messaging diagram illustrating messages flowing between a packet-data-capable mobile station in a foreign network that uses a foreign agent care-of address and the home agent of the mobile station in accordance with the second embodiment of the present invention. On power-up, the mobile station 201 sends the registration message 401 containing the new parameter to the base station/packet-control function 202 as described with respect to FIG. 4.
The new IS parameter indicates the need of the mobile station 201 to perform mobile IP
registration as well as mobile power-up registration. In response to the registration message 401, the base station/packet-control function 202 sends the location updating request 402 containing the new parameter to the mobile switching center 203. The location updating request 402 serves as a request from the base station/packet-control function 202 to the mobile switching center 203 to update the location of the mobile station 201.
The mobile switching center 203 responds to the location updating request 402 by sending the location updating accept message 207. The location updating accept message 207 is a response from the mobile switching center 203 to the base station/packet-control function 202 that indicates that the location updating request 402 has been processed. 1n Patent Application Docket No. P 14007CA
response to the registration message 401, the base station/packet-control function 202 sends the registration accepted order message 208, which is a response from the base station/packet-control fiznction 202 to the mobile station 201 that indicates that the registration message 401 has been processed. In further response to the location updating request 402 and the new parameter, the mobile switching center 203 sends the assignment request message 211 to the base station/packet-control function 202, which requests that radio resources be allocated to the mobile station 201.
Next, the traffic channel 212 is set up between the mobile station 201 and the base station/packet-control function 202, and the R-P link 213 is established between the base station/packet-control function 202 and the packet-data service node 301, the packet-data service node 301 being a foreign agent of the mobile station 201. The traffic channel 212 setup creates a traffic channel connection between the base station/packet-control function 202 and the mobile station 201. The R-P link 213 is a logical connection over the R-P
interface for a particular point-to-point protocol session. Establishment of the R-P link 213 creates a logical connection between the PCF portion of the base station/packet-control function 202 and the packet-data service node 301. Next, the base station/packet-control function 202 sends the assignment complete message 214 to the mobile switching center 203. The assignment complete message by the base station/packet-control function 202 notifies the mobile switching center 203 that the traffic channel 212 between the mobile station 201 and the base station/packet-control function 202 has been established.
Next, the point-to-point protocol (PPP) connection 215 is established between the mobile station 201 and the packet-data service node 301. Establishment of the point-to-point protocol connection 215 is at a link layer level between the mobile station 201 and the Patent Application Docket No. P 14007CA
packet-data service node 301. The point-to-point protocol connection 215 allows mobile IP registration to take place.
Next, the packet-data service node 301 sends the agent advertisement message containing the IP address of the packet-data service node 301, the IP address of the packet s data service node 301 being the foreign-agent care-of address of the mobile station 201.
The agent advertisement message 216 is sent by the packet-data service node 301 on the link layer and is used to allow the packet-data service node 301 to advertise its services, such as its care-of address. The mobile station 201 can alternatively send an agent solicitation message (not shown) to the packet-data service node 301, which message is well-known in the art.
In response to the agent advertisement message 216, the mobile station 201 sends the mobile IP registration request 304 to the packet-data service node 301, which message includes the foreign-agent care-of address of the packet-data service node 301. The mobile IP registration request 304 requests that the packet-data service node 301 perform mobile IP registration of the IP address of the packet-data service node 301 as the foreign-agent care-of address of the mobile station 201.
Next, the packet-data service node 301 engages in authentication 305 of the mobile station 20l into the home network of the mobile station 201 by initiating messaging between the packet-data service node 301, the foreign authentication, authorization, and accounting node (FAAA) 302, and the home authentication, authorization, and accounting node (HAAA) 303. Following authentication 305 of the mobile station 201 into the home network of the mobile station 201, the packet-data service node 301 forwards the mobile IP registration request 306 to the packet-data service node 204, which is the home agent of the mobile station 201. In response to the mobile IP registration request 306 by the packet-Patent Application Docket No. P 14007CA
data service node 301, the packet-data service node 204 sends the mobile IP
registration reply 307 to the packet-data service node 301. The packet-data service node 301 then forwards the mobile IP registration reply 3()8 to the mobile station 201. The mobile IP
registration reply 308 serves as an indication by the packet-data service node 301 of the result of the mobile IP registration request 304 of the mobile station 201.
In the event that the mobile station 201 powers up in the home network of the mobile station 201 rather than in a foreign network and therefore is in an area served by the packet-data service node 204, which is the home agent of the mobile station 201, upon receipt of the agent advertisement message 216 from the packet-data service node 204, the mobile station 201 de-registers its care-of address in the packet-data service node 204. If the mobile station 201 is in its home network, packet data received by the mobile station 201 can be sent directly to the IP address of the mobile station 20l by the packet-data service node 204. There is therefore no need for a care-of address.
It can thus be seen from FIG. 5 that when the mobile station 201 sends the I S registration message 40l in response to the mobile station 20l powering up, a sequence of events is triggered that results in registration of the foreign-agent care-of address into the home agent. The foreign-agent care-of address is the IP address of the packet-data service node 301. Therefore, upon power-up, the mobile station 201 can receive terminating packet-data via the foreign-agent care-of address.
Although preferred embodiments of the method and system of the present invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications, and Patent Application Docket No. P14007CA
substitutions without departing from the spirit of the invention as set forth and defined by the following claims.
Claims (14)
1. A method of communicating a care-of address of a mobile station comprising the steps of:
responsive to powering-up the mobile station in a foreign network, that mobile station sending a message, the message resulting in communication of a care-of address of the mobile station to a home agent of the mobile station; and sending terminating packet data to the mobile station using the care-of address.
responsive to powering-up the mobile station in a foreign network, that mobile station sending a message, the message resulting in communication of a care-of address of the mobile station to a home agent of the mobile station; and sending terminating packet data to the mobile station using the care-of address.
2. The method of claim 1 wherein the care-of address is a foreign-agent care-of address.
3. The method of claim 1 wherein the care-of address is a co-located care-of address.
4. The method of claim 1 wherein the message is an origination message, the origination message comprising a request from the mobile station for origination of a call without payload.
5. The method of claim 4 wherein the origination message comprises a packet-data-service option, the packet-data service-option including a parameter that indicates that the mobile station wishes to obtain packet-data services.
6. The method of claim 2 wherein the message is a registration message, the registration message comprising a request by the mobile station for mobile power-up registration of the mobile station.
7. The method of claim 6 wherein the registration message contains a new parameter, the new parameter indicating that the mobile station needs to perform mobile Ip registration.
8. A wireless communication system for providing packet-data services, comprising:
a home agent adapted to route packet data to a mobile station; and a mobile station in a foreign network operating to send a message in response to the mobile station powering-up, the message resulting in communication of a care-of address of the mobile station to the home agent, wherein the home agent uses the care-of address to route packet data to the mobile station.
a home agent adapted to route packet data to a mobile station; and a mobile station in a foreign network operating to send a message in response to the mobile station powering-up, the message resulting in communication of a care-of address of the mobile station to the home agent, wherein the home agent uses the care-of address to route packet data to the mobile station.
9. The system of claim 8 wherein the care-of address is a foreign-agent care-of address.
10. The system of claim 8 wherein the care-of address is a co-located care-of address.
11. The system of claim 8 wherein the message is an origination message, the origination message comprising a request from the mobile station for origination of a call without payload.
12. The system of claim 11 wherein the origination message comprises a packet-data-service option, the packet-data service-option including a parameter that indicates that the mobile station wishes to obtain packet-data services.
13. The system of claim 9 wherein the message is a registration message, the registration message comprising a request by the mobile station for mobile power-up registration of the mobile station.
14. The system of claim 13 wherein the registration message contains a new parameter, the new parameter indicating that the mobile station needs to perform mobile IP registration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70332700A | 2000-10-31 | 2000-10-31 | |
| US09/703,327 | 2000-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2359176A1 true CA2359176A1 (en) | 2002-04-30 |
Family
ID=24824958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002359176A Abandoned CA2359176A1 (en) | 2000-10-31 | 2001-10-15 | Method and system for mobile ip registration at mobile station power-up |
Country Status (3)
| Country | Link |
|---|---|
| BR (1) | BR0104926A (en) |
| CA (1) | CA2359176A1 (en) |
| MX (1) | MXPA01010494A (en) |
-
2001
- 2001-10-15 CA CA002359176A patent/CA2359176A1/en not_active Abandoned
- 2001-10-17 MX MXPA01010494 patent/MXPA01010494A/en unknown
- 2001-10-29 BR BR0104926A patent/BR0104926A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA01010494A (en) | 2003-05-19 |
| BR0104926A (en) | 2002-12-10 |
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