Method for a connection through a core network

• US 7,792,119 B2
• Filed: 05/21/2001
• Issued: 09/07/2010
• Est. Priority Date: 05/22/2000
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Israelsson, Martin, Maupin, Alain, Hellwig, Karl, Hodges, Phil, Noguera, Juan
• Primary Examiner(s): Ahmed; Salman
• Application Number:
  US10/276,845
• Publication Number:
  US 20040100914A1
• Time in Patent Office: 3,396 Days
• Field of Search: 370/338, 370/401, 370/410, 370/465, 370/332, 3703952-3955, 370/428, 455/436, 455/422
• US Class Current: 370/395.2
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 92/22 between access point controllers

Abstract

A method of establishing a connection between a first access node and a second access node via a core network having a first core network node, further core network nodes, and a final core network node. The first access node sends an access request to the first core network node, which stores a set of framing information parameters received in the access request. The first core network node initializes the connection to a further core network node and sends the parameter set together with an indication that transparent transmission is to be utilized after connection establishment. The initialization of the connection and storing of the parameter set and the indication is performed stepwise in further core network nodes until the final core network node is reached. The final core network node initializes the connection to the second access node, which stores the parameter set and the indication.

Claims

1. A method for the establishment of a connection between a first access node and a second access node via a core network, wherein the core network comprises two or more interconnected core network nodes including a first core network node and a final core network node, wherein:

the first core network node receives a set of parameters for framing information sent over an interface between the first access node and the first core network node for a connection, wherein the set of framing information parameters includes radio access bearer subflow combination indicators (RFCIs) for indicating a codec mode for the connection;

the first core network node stores the set of framing information parameters;

a decision is taken to set an indicator that transparent transmission will be performed after call establishment, wherein transparent transmission provides a transfer of frames without mapping between different framing protocols;

the first core network node initializes the connection to a further core network node according to a framing protocol, including the set of framing information parameters and the indicator that transparent transmission is to be performed after call establishment;

the further core network node stores the set of framing information parameters including said indicator;

if the final core network node has not been reached, further stepwise initialization of the connection to further core network nodes and storing of framing information parameters and the indicator in the further core network nodes is performed until the final core network node is reached;

the final core network node initializes a connection to the second access node according to said framing protocol and the second access node stores the set of framing information parameters including said indicator;

wherein the core network nodes are core network nodes in the connection; and

the first access node establishing a connection with the second access node via the first core network node and the final core network node.

2. The method according to claim 1, wherein the decision to set an indicator is taken by a core network control node controlling the first core network node.

3. The method according to claim 2, wherein a decision to monitor payload for initialization messages is taken by the core network control node and signaled to a core network node.

4. The method according to claim 2, wherein the core network control node decides to set a parameter that unsolicited Iu initializations are not permitted and sends said parameter to an access node.

5. The method according to claim 1, wherein the decision to set an indicator is taken by the first core network node.

6. The method according to claim 1, wherein the decision to set an indicator is taken by an access node.

7. The method according to claim 1, wherein a core network node in the connection breaks the connection and initializes a connection segment to a different core network node or access node according to said protocol, using the same set of framing information parameters for the connection segment as for the connection.

8. A method for the establishment of a connection between a first access node and a second access node via a core network, wherein the core network comprises two or more interconnected core network nodes including a first core network node and a final core network node, wherein:

the first core network node receives a set of parameters for framing information sent over an interface between the first access node and the first core network node for a connection;

the first core network node stores the set of framing information parameters;

a decision is taken to set an indicator that transparent transmission will be performed after call establishment, wherein transparent transmission provides a transfer of frames without mapping between different framing protocols;

the first core network node initializes the connection to a further core network node according to a framing protocol, including said indicator that transparent transmission is to be performed after call establishment;

the further core network node stores the set of framing information parameters including said indicator;

if the final core network node has not been reached, further stepwise initialization of the connection to and storing of framing information parameters and the indicator in further core network nodes is performed until the final core network node is reached;

the final core network node initializes a connection to the second access node according to said framing protocol and the second access node stores the set of framing information parameters including said indicator;

wherein;

the core network nodes are core network nodes in the connection;

the first access node establishes a connection with the second access node via the first core network node and the final core network node;

the second access node initializes a reverse connection to the final core network node according to the protocol, wherein a second set of parameters for the framing of information is transmitted; and

both sets of framing information parameters differ and a core network node inserts a pair of transcoders into the connection.

9. The method according to claim 8, wherein the final core network node sends a message to a control server for initiating a modification of connection parameters by the final access node, the final access node changing both the sets of framing information parameters for uplink and for downlink transmissions to the final core network node.

10. A method for the establishment of a connection between a first access node and a second access node via a core network, wherein the core network comprises two or more interconnected core network nodes comprising a first core network node and a final core network node, wherein:

the first access node initializes the connection to a first core network node according to a framing protocol, wherein a set of parameters for the framing of information sent over the interface between the first access node and the first core network node is transmitted to the first core network node wherein the set of framing information parameters includes radio access bearer subflow combination indicators (RFCIs) for indicating a codec mode for the connection;

the first core network node stores the set of framing information parameters;

the first core network node initializes the connection to a further core network node according to said protocol;

the further core network node stores the set of framing information parameters;

if the final core network node has not been reached, stepwise initialization of the connection to and storing of said set of framing information parameters in further core network nodes is performed until the final core network node is reached;

the final core network node initializes a connection to the second access node according to said protocol and the second access node stores the set of framing information parameters and wherein the core network nodes are core network nodes in the connection; and

the first access node establishes a connection with the second access node via the first core network node and the final core network node.

11. The method according to claim 10, wherein the framing protocol is the Iu protocol.

12. The method according to claim 10, wherein a core network node in the connection inserts a function unit into the connection.

13. The method according to claim 10, wherein a core network node is adapted to establish connections according to different framing protocols, checks the framing protocol defined in a request to initialize a connection, and selects said framing protocol for the initialization of the connection to a further node.

14. The method according to claim 10, wherein a core network node acknowledges the initialization to a preceding node.

15. The method according to claim 10, wherein a core network node in the connection breaks the connection and initializes a connection segment to a different core network node or access node according to said protocol.

16. A method for the establishment of a connection between a first access node and a second access node via a core network, wherein the core network comprises two or more interconnected core network nodes comprising a first core network node and a final core network node, wherein:

the first access node initializes the connection to a first core network node according to a framing protocol, wherein a set of parameters for the framing of information sent over the interface between the first access node and the first core network node is transmitted to the first core network node;

the first core network node stores the set of framing information parameters;

the first core network node initializes the connection to a further core network node according to said protocol;

the further core network node stores the set of framing information parameters;

if the final core network node has not been reached, stepwise initialization of the connection to and storing of said set of framing information parameters in further core network nodes is performed until the final core network node is reached;

the final core network node initializes a connection to the second access node according to said protocol and the second access node stores the set of framing information parameters and wherein the core network nodes are core network nodes in the connection; and

the first access node establishes a connection with the second access node via the first core network node and the final core network node;

wherein the second access node initializes a reverse connection to the final core network node according to the protocol, wherein a second set of parameters for the framing of information is transmitted, and the initialization is performed stepwise to the first access node, wherein both sets of framing information parameters are incompatible and a core network node inserts a transcoder into the connection.

17. The method according to claim 16, wherein a core network node sends a message to a control server for initiating a modification of connection parameters by at least one access node.

18. A core network node in a communication network, wherein said node can be interconnected with further core network nodes, comprising:

an interface for receiving an initialization request from a first access node or a further core network node to establish a connection between the first access node and a further access node according to a framing protocol;

a processing system to extract a set of parameters for the framing protocol from the request and initialize the connection to a further core network node or the further access node according to said protocol, wherein the set of framing protocol parameters includes radio access bearer subflow combination indicators (RFCIs) for indicating a codec mode for the connection;

an interface for sending an initialization request for the connection to the further core network node or the further access node and for sending the set of framing protocol parameters to the further core network node or the further access node; and

a memory for storing the extracted set of framing protocol parameters.

19. A core network node in a communication network, wherein said node can be interconnected with further core network nodes, comprising:

an interface for receiving an initialization request from a first node to establish a connection between a first access node and a further access node according to a framing protocol;

a processing system for extracting a set of parameters for the framing protocol from the request and for determining an indicator for permitting transparent Iu User Plane (Iu UP) transmission after connection establishment, and for initializing the connection to a further node in the connection according to said protocol, and for monitoring the transmission according to the indicator, wherein the set of framing protocol parameters includes radio access bearer subflow combination indicators (RFCIs) for indicating a codec mode for the connection;

an interface for sending an initialization request for the connection to the further node in the connection and for sending the set of framing protocol parameters and the indicator to the further node in the connection; and

a memory for storing the extracted set of framing protocol parameters and said indicator.

20. The core network node according to claim 19, wherein the core network node is adapted to perform a decision to set said indicator.