Method, System and Device for Switching a Transmission Time Interval

A method for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the method comprising:

• a User Equipment (UE) transmitting a report comprising a measured received power by the UE;
• a serving Base Station (BS) for the UE receiving the report, and forwarding the report to a Control Node;
• the Control Node receiving the report, evaluating the report and deciding, based on the evaluation, to order the UE to initialize a switching of an actual TTI length value to a different TTI length value, by transmitting a switching message, the switching message comprising a first identifier identifying the different TTI length value;
• the BS receiving the switching message and forwarding the switching message to the UE;
• and
• the UE transmitting a single reply message in response to receiving the switching message, for acknowledging reception of the switching message and initializing a synchronized switching to the different TTI length value identified by the first identifier.

A method in a Base Station (BS) for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the BS deploying an actual TTI length value, the method comprising:

• receiving a report comprising a measured received power by a User Equipment (UE) and forwarding the report;
• receiving a switching message in response to the forwarded report, and forwarding the switching message, the switching message comprising a first identifier identifying a different TTI length value;
• receiving a single reply message in response to transmitting the switching message, for acknowledging reception of the switching message and initializing a synchronized switching to the different TTI length value identified by the first identifier;
• holding transmission of messages for a number of TTIs;
• and
• commencing transmission of messages deploying the different TTI length value.

A method in a Base Station (BS) for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the BS deploying an actual TTI length value, the method comprising:

• receiving a report comprising a measured received power by a User Equipment (UE);
• evaluating the report and deciding, based on the evaluation, to order the UE to initialize a switching of an actual TTI length value to a different TTI length value, by transmitting a switching message, the switching message comprising a first identifier identifying a different TTI length value;
• receiving a single reply message in response to transmitting the switching message, for acknowledging reception of the switching message and initializing a synchronized switching to the different TTI length value identified by the first identifier;
• holding transmission of messages for a number of TTIs;
• and
• commencing transmission of messages deploying the different TTI length value.

A system for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the system comprising at least one User Equipment (UE), at least one Base Station, and a Control Node, wherein;

• the UE is configured to transmit a report comprising a measured received power by the UE;
• a Base Station (BS) being the serving BS of UE, is configured to receive the report, and forward the report to the Control Node;
• the Control Node is configured to receive the report, evaluate the report and decide, based on the evaluation, to order the UE to initialize a switch of an actual TTI length value to a different TTI length value, wherein the control node is further arranged to transmit a switching message, the switching message comprises a first identifier identifying a different TTI length value;
• the BS is further configured to receive the switching message, and forwards the switching message;
• and
• the UE is further configured to transmit a single reply message in response to the reception of the switching message, for an acknowledgement of reception of the switching message, and to initialize a synchronized switching to the different TTI length value identified by the first identifier.

A User Equipment (UE) for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the UE being configured to deploy an actual- and a different-TTI length value, the UE comprising:

• a processing circuit comprising a processor configured to process program instructions and a memory arranged to store the program instructions and network parameters;
• an interface circuit configured to connect to other entities;
• wherein the processing circuit is configured to:
• control the interface circuit so that a switching message comprising a first identifier identifying the different TTI length value is received and stored in the memory,
• compile a single reply message in response to the switching message, so as to acknowledge reception of the switching message and so as to initialize a synchronized switching to the different TTI length value identified by the first identifier;
• and
• control the interface circuit to transmit the compiled single reply message.

A Base Station (BS) for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the BS arranged to deploy an actual- and a different-TTI length value, the BS comprising:

• a processing circuit comprising a processor configured to process program instructions and a memory configured to store the program instructions and network parameters;
• and
• an interface circuit arranged to connect to other entities;
• wherein the processing circuit is configured to:
• control the interface circuit to receive a report message, the report message comprising a report comprising a measured received power by a User Equipment (UE) and forwarded;
• control the interface circuit to receive a switching message in response to the forwarded report, and to forward the switching message, the switching message comprising a first identifier identifying the different TTI length value;
• and
• control the interface circuit so that a single reply message is received and forwarded, the single reply message interpreted by the processing unit as an acknowledge to the switching message transmission and the single reply message interpreted by the processor as an initiation to hold transmissions with respect to the UE.

A Base Station (BS) for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, the BS being arranged to deploy an actual- and a different-TTI length value, the BS comprising:

• a processing circuit comprising a processor configured to process program instructions and a memory configured to store the program instructions and network parameters;
• and
• an interface circuit configured to connect to other entities;
• wherein the processing circuit is configured to:
• control the interface circuit to receive a report message, the report message comprising a report comprising a measured received power by a User Equipment (UE);
• evaluate the report and deciding, based on the evaluation, to order the UE to initialize a switching of an actual TTI length value to a different TTI length value and transmit a switching message, the switching message comprising a first identifier identifying the different TTI length value;
• and
• control the interface circuit so that that a single reply message is received and forwarded, the single reply message interpreted by the processing unit as an acknowledge to the switching message transmission and the single reply message interpreted by the processor as an initiation to hold transmissions with respect to the UE.

A non-transitory computer-readable medium comprising, stored thereupon, a computer program configured so that, when the computer program is executed by a processing circuit in a Base Station (BS), the BS is adapted to carry out or control a method for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, such that the method comprises:

• receiving a report comprising a measured received power by a User Equipment (UE) and forwarding the report;
• receiving a switching message in response to the forwarded report, and forwarding the switching message, the switching message comprising a first identifier identifying a different TTI length value;
• receiving a single reply message in response to transmitting the switching message, for acknowledging reception of the switching message and initializing a synchronized switching to the different TTI length value identified by the first identifier;
• holding transmission of messages for a number of TTIs;
• and
• commencing transmission of messages deploying the different TTI length value.

A non-transitory computer-readable medium comprising, stored thereupon, a computer program that, when executed by a processing circuit in a Base Station (BS), causes the BS to carry out or control a method for synchronized switching of a Transmission Time Interval (TTI) between at least two different TTI length values, such that the method comprises:

• receiving a report comprising a measured received power by a User Equipment (UE);
• evaluating the report and deciding, based on the evaluation, to order the UE to initialize a switching of an actual TTI length value to a different TTI length value, by transmitting a switching message, the switching message comprising a first identifier identifying a different TTI length value;
• receiving a single reply message in response to transmitting the switching message, for acknowledging reception of the switching message and initializing a synchronized switching to the different TTI length value identified by the first identifier;
• holding transmission of messages for a number of TTIs;
• and
• commencing transmission of messages deploying the different TTI length value.