Configuring radio resources
A method, performed by a wireless device, is disclosed. The method is for managing radio resources in the wireless device and comprises receiving a message configuring a radio bearer for use by the wireless device, checking the message for a ciphering configuration setting enabling or disabling ciphering for the radio bearer, and performing at least one of enabling or disabling ciphering for the radio bearer in accordance with the received message. Also disclosed are a method performed by a base station for configuring radio resources for use by a wireless device, a wireless device, a user equipment and a base station.
1. A method performed by a wireless device for managing radio resources in the wireless device, the method comprising the wireless device:
receiving a message configuring at least one radio bearer for use by the wireless device, wherein the message includes a bearer-specific pdcp-Config Information Element for the at least one radio bearer;
checking the bearer-specific pdcp-Config Information Element associated with a radio bearer of the at least one radio bearer for a ciphering configuration setting enabling or disabling ciphering for the radio bearer, wherein the ciphering configuration is located after an extension marker of the bearer-specific pdcp-Config Information Element; and
performing at least one of enabling or disabling ciphering for the radio bearer in accordance with the ciphering configuration in the associated pdcp-Config Information Element.
2. The method of claim 1 , wherein performing at least one of enabling or disabling ciphering for the radio bearer in accordance with the received message comprises:
if the message includes a ciphering configuration setting for the radio bearer, performing at least one of enabling or disabling ciphering for the radio bearer in accordance with the ciphering configuration setting included in the message; and
if the message does not include a ciphering configuration setting for the radio bearer, performing at least one of enabling or disabling ciphering for the radio bearer in accordance with a reference ciphering configuration setting for the radio bearer.
3. The method of claim 2 , wherein:
if the radio bearer configured by the message is not part of the current configuration for the wireless device, the reference ciphering configuration setting comprises a default ciphering configuration setting; and
if the radio bearer configured by the message is part of the current configuration for the wireless device, the reference ciphering configuration setting comprises the existing ciphering configuration setting for the radio bearer.
4. The method of claim 1 , wherein the message comprises a Radio Resource Control Connection Reconfiguration message or a Radio Resource Control Reconfiguration message.
5. The method of claim 1 , wherein checking the message for a ciphering configuration setting for the radio bearer comprises checking an Information Element inside a RadioBearerConfig Information Element.
6. The method of claim 1 , wherein the ciphering configuration setting comprises an Optional parameter, the optional parameter comprising a single bit indicating if ciphering is to be enabled or disabled.
7. The method of claim 1 , wherein the radio bearer is associated to a Protocol Data Unit, PDU, Session, and wherein checking the message for a ciphering configuration setting for the radio bearer comprises checking for a ciphering configuration setting for application to all radio bearers associated to that PDU Session.
8. A method performed by a base station for configuring radio resources for use by a wireless device, the method comprising:
generating a message configuring at least one radio bearer for use by the wireless device, wherein the message includes a bearer-specific pdcp-Config Information Element for the at least one radio bearer;
including in the message a ciphering configuration setting enabling or disabling ciphering for the radio bearer, wherein the ciphering configuration is located after an extension marker of the bearer-specific pdcp-Config Information Element; and
transmitting the message to the wireless device.
9. The method of claim 8 , further comprising:
comparing the ciphering configuration setting for the radio bearer to a reference ciphering configuration setting for the radio bearer; and
including the ciphering configuration setting for the radio bearer in the generated message only if the ciphering configuration setting differs from the reference ciphering configuration setting.
10. The method of claim 9 , wherein:
if the radio bearer configured by the message is not part of the current configuration for the wireless device, the reference ciphering configuration setting comprises a default ciphering configuration setting; and
if the radio bearer configured by the message is part of the current configuration for the wireless device, the reference ciphering configuration setting comprises the existing ciphering configuration setting for the radio bearer.
11. The method of claim 8 , wherein the message comprises a Radio Resource Control, RRC, Reconfiguration message.
12. The method of claim 8 , wherein including a ciphering configuration setting for the radio bearer in the message comprises including the ciphering configuration setting in an Information Element inside a RadioBearerConfig Information Element.
13. The method of claim 8 , wherein the ciphering configuration setting comprises an Optional parameter, the optional parameter comprising a single bit indicating if ciphering should be enabled or disabled.
14. The method of claim 8 , wherein the radio bearer is associated to a Protocol Data Unit, PDU, Session, and wherein including a ciphering configuration setting for the radio bearer in the message comprises including a ciphering configuration setting for application to all radio bearers associated to that PDU Session.
15. A wireless device for managing radio resources in the wireless device, the wireless device comprising:
processing circuitry; and
power supply circuitry configured to supply power to the wireless device; wherein the processing circuitry is configured to:
receiving a message configuring at least one radio bearer for use by the wireless device, wherein the message includes a bearer-specific pdcp-Config Information Element for the at least one radio bearer;
check the bearer-specific pdcp-Config Information Element associated with a radio bearer of the at least one radio bearer for a ciphering configuration setting enabling or disabling ciphering for the radio bearer, wherein the ciphering configuration is located after an extension marker of the bearer-specific pdcp-Config Information Element; and
perform at least one of enabling or disabling ciphering for the radio bearer in accordance with the ciphering configuration in the associated pdcp-Config Information Element.
16. A base station for configuring radio resources for use by a wireless device, the base station comprising:
processing circuitry;
power supply circuitry configured to supply power to the base station; wherein the processing circuitry is configured to:
generate a message configuring at least one radio bearer for use by the wireless device, wherein the message includes a bearer-specific pdcp-Config Information Element for the at least one radio bearer;
include in the message a ciphering configuration setting enabling or disabling ciphering for the radio bearer, wherein the ciphering configuration is located after an extension marker of the bearer-specific pdcp-Config Information Element; and
transmit the message to the wireless device.