This document discloses a solution for carrying out contention‐based uplink transmission. According to an aspect, a method comprises: using, by a device, an uplink timing synchronization status of the device to select a radio access resource from a plurality of radio access resources shared among a plurality of wireless devices including said device; and transmitting, by the device, a message in the selected radio access resource.

Various communication systems may benefit from appropriately configured feedback. For example, certain embodiments may benefit from single cell point-to-multipoint feedback methods and mechanisms. A method can include determining, by a user equipment, that a data transport block was not received. The method can also include feeding back, by the user equipment, a preamble indicating a measured downlink channel state information responsive to the determination that the data transport block was not received.

Various communication systems may benefit from appropriate measurements. For example, certain wireless communication systems may benefit from an approach in which detection-less radio resource management measurements may be taken. A method can include determining that handover of a user equipment is possible. The method can also include providing the user equipment with measurement assistance information. The measurement assistance information can be configured to permit the user equipment to hand over from a non-anchor physical resource block of a source cell to a non-anchor physical resource block of a target cell.

Feedback mechanisms may be helpful for various communication systems. For example, narrowband intemet of things and/or machine type communication systems may benefit from feedback for single cell point to multipoint communication. A method can include monitoring, by user equipment, for a single cell multicast traffic channel transmission. The method can also include contingently sending, by the user equipment, feedback based on how the single cell multicast traffic channel transmission is received, using a physical random access channel preamble.

A method is provided including receiving, by a user equipment from a wireless network, an indication of a plurality of contention based transmission occasions and a monitoring window size that the user equipment monitors for feedback for the contention based transmission; determining, by a user equipment of a wireless network, whether an amount of user data can be transmitted on one or more of contention based transmission occasions; performing one or more contention based transmissions during the one or more of the contention based transmission occasions based at least on the determination; and monitoring for feedback for each of the performed contention based transmissions based at least on the monitoring window size, wherein the feedback includes feedback for each contention based transmission in a feedback mapping window.

It is provided a method, comprising monitoring if a first indication is received indicating that a first predefined transmission time interval is to be applied to a first communication to be transmitted on an uplink shared channel after receiving a random access response of a random access procedure, wherein the first indication is comprised in the random access response to which a default transmission time interval is applied, and the first predefined transmission time interval is different from the default transmission time interval; configuring a communication device to apply the first predefined transmission time interval to the first communication if the random access response comprises the first indication.

Methods and apparatuses for controlling communication with a communication device connected to a plurality of access points are described. Predefined inactivity in communications between a first access point and the communication device may be determined at the first access point. An indication of predefined inactivity in communications between the communication device and a second access point may be provided by the second access point. Connectivity state of the communication device is only changed when said predefined inactivity in communications between the first access point and the communication device has been determined and said indication has been provided.

The example embodiments of the invention provide at least a method and apparatus to configure a resource pool for a plurality of user equipment configured with contention based transmission; configure a resource allocation within the resource pool for a contention based transmission by a user equipment of the plurality of user equipment configured for contention based transmissions, wherein the resource allocation is configured with more than one predefined or preconfigured sets of resource allocation granularities; and send information comprising the resource allocation towards the user equipment, wherein the information comprises an indication of a set of the predefined or preconfigured sets of the resource allocation granularities that the user equipment is to use for the contention based transmission. Further, there is receiving resources allocated for a contention based transmission, the resource allocation configured with predefined or preconfigured sets of resource allocation granularities, the information comprises an indication of a set of the predefined or preconfigured sets of the resource allocation granularities to use; and identifying the resource allocation granularities set to use for the contention based transmission.

A method including transmitting signals from a first base station to a second base station in a network; and during an interface setup or an interface update between the first base station and the second base station, receiving by the first base station information regarding at least one of: whether coverage enhancement (CE) is supported by the second base station, a maximum coverage enhancement (CE) level supported by the second base station, whether low-cost coverage enhancement (CE) is supported by the second base station, and coverage enhancement (CE) level criteria at the second base station.

There is provided a method comprising receiving system information at a user device capable of operating using a discontinuous reception period, the system information comprising at least one system information block and an information element indicating one of a set of values and determining whether to read at least one system information block of the system information in dependence on at least one of: determining whether the length of the discontinuous reception period is greater than or equal to a first threshold value, and comparing a received value indicated by the information element to a stored value indicated by the information element and, if the received value is the same as the stored value, determining if information has been received at the user device, the information comprising an indication of wrap around of the set of values.

A method and an apparatus are disclosed, wherein a configuration of at least one channel monitoring related timer is defined (301) such that the effective value of the channel monitoring related timer is mapped to a coverage en-hancement CE level. The apparatus performs (302) monitoring of downlink control channel sub-frames transmitted (303) from a network element to a ter-minal device, according to said configuration of the channel monitoring related timer.

A handover apparatus is provided, comprising: means for receiving a handover request message from a first network element; meansfor sending a handover indication message to a second network element while sending a handover acknowledgement message to the first network element. The present disclosure manages to reduce the handover delay so as to enable fa st handover for dual connectivity.

An apparatus for use by a communication network control element or function, the apparatus comprising at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitty, cause the apparatus at least: to conduct a transmission control processing for transmitting a data block in a communication network between at least two network elements or funcrions, the transmission control processing including defining a transmission format for the data block to be transmitted, wherein the format is based on dividing data to be transmitted into a first type of code block group and a second type of code block group, determining a first modulation and coding scheme to be used for transmission of the first type of code block group and a second modulation and coding scheme being different to the fist modulation and coding scheme and to be used for transmission of the second type of code block group, and allocating resources to be used for transmission of the first type of code block group, to prepare configuration information on the basis of the result of the transmission control processing, and to cause transmission of the configuration information to a network element or function participating in a transmission of the data block.

A method comprises causing identifying information identifying a user equipment context to be sent to a base station associated with said user context from a target base station and receiving from said base station associated with user equipment context information about said user context.

A method comprising: defining at least one extended modification period; determining a system information change; generating at least one paging message indicator based on the paging message occurring within the at least one extended modification period.

A method comprising: configuring a user equipment in a low activity state to operate according to a grant-free uplink transmission scheme; and in response to detecting at least one condition, scheduling a discontinuous reception state at the user equipment, during which the user equipment is configured to monitor for one or more messages intended for the user equipment.