Method for operating a cellular network

A method for operating a relay station adapted for communicating in a network, including a primary station linked to a core network, said primary station serving a cell, and a secondary station served by the primary station, wherein the relay station is served by the primary station, the method comprising the steps of:

• establishing, by the relay station, a connection with the primary station, including receiving in at least one first secure message from the primary station a first set of configuration parameters including a number of attributes or a set of service codes,
• wherein the relay station establishing a connection with the primary station includes the relay station generating a relay public encryption key and relay private encryption key, sending the relay public encryption key to the primary station for signature by the core network, and receiving in the at least one first secure message from the primary station the first set of service codes and a first core network signature based on at least the relay public encryption key,
• transmitting, by the relay station, at least one attribute from a second set of configuration parameters or a transmitted service code from the second set of configuration parameters,
• establishing, by the relay station, a direct communication with the secondary station upon request from the secondary station, said request being based on the transmitted service message.

A method for operating a secondary station adapted for communicating in a communication system including a primary station linked to a core network, said primary station serving a cell, a relay station served by the primary station, wherein the secondary station is served by the primary station, the method comprising the steps of:

• establishing, by the secondary station, a connection with the primary station, including receiving from the primary station in at least one second secure message a public encryption key, and a second set of attributes or relay service codes linked to an upcoming data exchange with at least one relay station,
• wherein the secondary station establishing a connection with the primary station includes the secondary station generating a secondary station public encryption key and a secondary station private encryption key, sending the secondary public encryption key to the primary station for signature by the core network, and receiving in the at least one second secure message from the primary station the second set of service codes and a second core network signature based on at least the secondary station public encryption key,
• receiving, by the secondary station, at least one transmitted attribute or relay service code from the relay station,
• determining, by the secondary station, whether the transmitted attribute or service code is included in a second set of configuration parameters and establishing a direct communication with the relay station upon determination that the transmitted attribute or service code is included in the second set of configuration parameters or fulfills a policy in it.

A relay station adapted for communicating in a network, including a primary station linked to the core network, said primary station serving a cell, and a secondary station served by the primary station, wherein the relay station is served by the primary station, the relay station comprising:

• a transmitter,
• a receiver,
• a controller adapted to establish a connection with the primary station,
• including configuring the receiver for receiving in at least one first secure message from the primary station a first set of configuration parameters including attributes or service codes,
• wherein the relay station establishing a connection with the primary station includes the relay station generating a relay public encryption key and relay private encryption key, sending the relay public encryption key to the primary station for signature by the core network, and receiving in the at least one first secure message from the primary station the first set of service codes and a first core network signature based on at least the relay public encryption key,
• the transmitter being configured for transmitting at least one transmitted attribute or service code from the first set of configuration parameters,
• wherein the controller is configured for establishing a direct communication with the secondary station using the public key upon request from the secondary station, said request being based on the transmitted service message.

A secondary station adapted for communicating in a communication system including a primary station linked to the core network, said primary station serving a cell, a relay station served by the primary station, wherein the secondary station is served by the primary station, the secondary station comprising:

• a transmitter,
• a receiver,
• a controller adapted to establish a connection with the primary station, including configuring the receiver for receiving from the primary station in at least one second secure message a second set of configuration parameters including attributes or relay service codes linked to an upcoming data exchange with at least one relay station,
• wherein the secondary station establishing a connection with the primary station includes the secondary station generating a secondary station public encryption key and a secondary station private encryption key, sending the secondary public encryption key to the primary station for signature by the core network, and receiving in the at least one second secure message from the primary station the second set of service codes and a second core network signature based on at least the secondary station public encryption key,
• the receiver being adapted for receiving at least one transmitted attribute or service code from the relay station,
• wherein the controller is configured for determining whether the transmitted attribute or service code is included in the second set of configuration parameters or fulfill a policy in it and causing the transmitter to establish a direct communication with the relay station upon determination that the transmitted service code is included in the second set.