Abstract: A fault tolerance solution for a multi-layer cloud system. The embodiments of this disclosure are applicable to radio access network (RAN) application area as well as cloud environment with virtual machine or container-based application function implementation. In one aspect there is a method performed by a load balancing system, which method includes: receiving a request sent by a client and selecting from a first cluster of serving entities a first main serving entity and a first backup serving entity. The method also includes, as a result of receiving the request sent by the client, sending to the client information identifying the selected first main serving entity and the selected first backup serving entity.

Abstract: A fault tolerance solution for a multi-layer cloud system. The embodiments of this disclosure are applicable to RAN application area as well as cloud environment with virtual machine or container-based application function implementation. In one aspect there is a method performed by a load balancing system, which method includes: receiving a request sent by a client and selecting from a first cluster of serving entities a first main serving entity and a first backup serving entity. The method also includes, as a result of receiving the request sent by the client, sending to the client information identifying the selected first main serving entity and the selected first backup serving entity.

Abstract: A method comprises determining a first and a second sub-carrier associated with a channel, and multiplying a signal received on the first sub-carrier with a first number to form a first resulting signal. The first number multiplied with a known signal transmitted by a second transmitting node on the first sub-carrier equals a constant value. A signal received on the second sub-carrier is multiplied with a second number to form a second resulting signal. The second number multiplied with the known signal transmitted by the second transmitting node on the second sub-carrier equals the constant value. The second resulting signal is subtracted from the first resulting signal to obtain a signal for which interference from the second transmitting node is suppressed, and the channel is estimated based on the obtained signal.

Abstract: A method executed in a first radio base station located in a first cell is provided for acquiring scheduling information associated with a second radio base station located in a neighboring cell, where the method comprises listening, via an air interface, to scheduling information transmitted, via a downlink control channel, from the second radio base station; decoding the received scheduling information, and providing the decoded scheduling information to an uplink receiver and/or uplink scheduler associated with the radio base station, such that the uplink receiver and/or uplink scheduler will be able to enhance its performance on the basis of the received scheduling information. An arrangement for executing the suggested method is also provided.

Abstract: A method executed in a first radio base station located in a first cell is provided for acquiring scheduling information associated with a second radio base station located in a neighboring cell, where the method comprises listening, via an air interface, to scheduling information transmitted, via a downlink control channel, from the second radio base station; decoding the received scheduling information, and providing the decoded scheduling information to an uplink receiver and/or uplink scheduler associated with the radio base station, such that the uplink receiver and/or uplink scheduler will be able to enhance its performance on the basis of the received scheduling information. An arrangement for executing the suggested method is also provided.

Abstract: A method comprises determining a first and a second sub-carrier associated with a channel, and multiplying a signal received on the first sub-carrier with a first number to form a first resulting signal. The first number multiplied with a known signal transmitted by a second transmitting node on the first sub-carrier equals a constant value. A signal received on the second sub-carrier is multiplied with a second number to form a second resulting signal. The second number multiplied with the known signal transmitted by the second transmitting node on the second sub-carrier equals the constant value. The second resulting signal is subtracted from the first resulting signal to obtain a signal for which interference from the second transmitting node is suppressed, and the channel is estimated based on the obtained signal.