Resource setting control for transmission using contention based resources

An apparatus comprising:

• at least one processor;
• and at least one non-transitory memory including computer program code, wherein the at least one memory and the computer code are configured, with the at least one processor, to cause the apparatus to at least perform the following:
• setting resources for a data transmission between a user equipment and a base transceiver station;
• combining a resource dedicated to the user equipment with at least one contention based resource allocated to a contention based transmission by the user equipment resulting in the dedicated resource acting as a preamble for the contention based resource for the data transmission,
• wherein the combining comprises:
• selecting the at least one contention based resource to be combined;
• mapping according to a predetermined rule and based on an information indicating a specific resource element dedicated to the user equipment to at least one set of available contention based resources;
• and
• determining an information identifying at least one resource element of the at least one contention based resource.

A computer program product embodied on a non-transitory computer-readable medium in which a computer program is stored that, when being executed by a computer, is configured to provide instructions to control or carry out:

• setting resources for a data transmission between a user equipment and a base transceiver station;
• combining a resource dedicated to the user equipment with at least one contention based resource allocated to a contention based transmission by the user equipment resulting in the dedicated resource acting as a preamble for the contention based resource for the data transmission,
• wherein the combining comprises:
• selecting the at least one contention based resource to be combined by
• executing a mapping according to a predetermined rule and based on an information indicating a specific resource element dedicated to the user equipment to at least one set of available contention based resources, and
• determining an information identifying at least one resource element of the at least one contention based resource.