Abstract: According to certain embodiments, a method by a wireless device is provided for mapping control information on carriers. The method includes receiving, by the wireless device, a mapping between at least one serving cell and at least one PUCCH channel. Based on the mapping, a particular PUCCH channel on which PUCCH-related signalling is to be transmitted for a particular serving cell is determined. The PUCCH-related signalling is transmitted on the particular PUCCH channel.

Abstract: A method in a first network node for handover preparation of a user equipment of a first category in a wireless communications network. The handover preparation is performed between a first cell served by the first network node and a second cell served by a second network node comprised in the wireless communications network. The first network node sends (301) to the second network node a message comprising information indicating a request for preparation of a handover of the user equipment. The request is specific for user equipment of the first category. The first network node receives (302) from the second network node a message indicating failure to prepare the handover. The first network node interprets (303) the message indicating failure to prepare the handover as an indication that the second network node does not support any user equipment of the first category.

Abstract: A method in a network node for random access of a user equipment to the network node. The network node receives (302) a random access request from the user equipment. The random access request comprises a preamble that belong to a preamble area, which preamble area comprises one or more preambles available for transmission of random access requests from the user equipment. The preamble area is defined by a first random access preamble and a last random access preamble. The preamble area is overlapping with any one or more out of: preambles used for contention free random access and preambles used for contention-based random access. The network node transmits (303) to the user equipment a random access response. The random access response has a size based on the preamble that belongs to the preamble area.

Abstract: Mobile devices exchange indications of their supported access stratum (AS) versions with each other during device-to-device communication, to determine a common AS version for subsequent communication. In an example method, a first wireless device receives a first incoming version indicator from a second wireless device, the first incoming version indicator identifying an AS version supported by the second wireless device, and transmits a device version indicator in one or more outgoing messages, in response to determining that the first incoming version indicator is unknown to the first wireless device or that the first incoming version indicator corresponds to an AS version that is not supported by the first wireless device. The transmitted device version indicator corresponds to the most recent AS version of two or more AS versions supported by the first wireless device.

Abstract: The embodiments herein relate to a method in a user equipment (605) for communicating with a base station (603) in a communications network (600). The user equipment (605) is configured to communicate with the base station (603) according to a selectable of at least two user equipment categories. The user equipment (605) selects one of the at least two user equipment categories if information indicating the one of the user equipment categories is received from the base station (603). The user equipment (605) selects a default of the user equipment categories if no information indicating which of the user equipment categories is received from the base station (603). The user equipment (605) determines a soft buffer size according to the selected user equipment category. The user equipment (605) communicates with the base station (603) according to the selected user equipment category and applying the determined soft buffer size.

Abstract: A method performed by a wireless device (130) for sending a message comprising one or more populated fields (704, 801, 901) to a network node (110). The wireless device (130) and the network node (110) operate in a wireless communications network (100). The wireless device (130) populates (701) one or more fields (704, 801, 901) comprised in an existing message to be sent to the network node (110) with an indication of a restriction of the wireless device (130). The wireless device (130) also sends (702) the message comprising the one or more populated fields (704, 801, 901) to the network node (110) prior to an enquiry or a fetching of category and capability information of the wireless device (130) by the network node (110).

Abstract: System Information Broadcast for Machine-Type Communication There is provided a method of operating a network node (6; 8; 10) in a communication network (2), the method comprising transmitting information required by a mobile device (12) for reliable communications with the communication network to mobile devices (12) in a single information block (103). Also provided is a method of operating a mobile device (12) in a communication network (2), the method comprising receiving information required by the mobile device (12) for reliable communications with the communication network in a single information block from the communication network (117). A network node and mobile device are also provided that are configured to perform the respective methods.

Abstract: Embodiments herein relate to a method in a mobile terminal for requesting access to a wireless communication system. The mobile terminal receives broadcasted system information that indicates a first available resource of a contention based channel. The mobile terminal derives a second available resource of the contention based channel based on the first available resource of the contention based channel. The mobile terminal further transmits an access request preamble mapped to the second available resource to access the wireless communication system.

Abstract: Embodiments herein relate to a method in a mobile terminal for requesting access to a wireless communication system. The mobile terminal receives broadcasted system information directly indicating first access request preambles for a first contention based channel, and indirectly indicating second access request preambles for a second contention based channel based on the directly indicated first access request preambles. The mobile terminal further derives the second access request preambles from the first access request preambles. Additionally, the mobile terminal requests access using the second access request preambles or the first access request preambles to access the wireless communication system.

Abstract: Embodiments herein relate to a method in a mobile terminal (10) for requesting access to a wireless communication system. The mobile terminal (10) receives broadcasted system information directly indicating first access request preambles for a first contention based channel, and indirectly indicating second access request preambles for a second contention based channel based on the directly indicated first access request preambles. The mobile terminal (10) further derives the second access request preambles from the first access request preambles. Additionally, the mobile terminal requests access using the second access request preambles or the first access request preambles to access the wireless communication system.

Abstract: Embodiments herein relate to a method in a mobile terminal (10) for requesting access to a wireless communication system. The mobile terminal (10) receives broadcasted system information that indicates a first available resource of a contention based channel. The mobile terminal (10) derives a second available resource of the contention based channel based on the first available resource of the contention based channel. The mobile terminal (10) further transmits an access request preamble mapped to the second available resource to access the wireless communication system.

Abstract: Network node (110) and method (600) in a network node (110), for admission control of a request for a radio access bearer to be received from a user equipment (120). The method (600) comprises monitoring (601) the achievement of quality of service requirement of an admitted radio access bearer, detecting (602) when the quality of service requirement of the admitted radio access bearer is not achieved, assessing (603) a reason why the quality of service of the admitted radio access bearer is not achieved, and determining (604) admittance of a further request for radio access bearer, based on the reason why the quality of service of the admitted radio access bearer is not achieved.

Abstract: Communication efficiency may be enhanced by using compressed headers. In an example embodiment, a method is performed by a transmitting device to reduce header size. A mapping is created between a logical channel identifier and a compressed logical channel identifier. The compressed logical channel identifier occupies fewer bits than the logical channel identifier. The mapping is transmitted to a receiving device. A compressed header that includes the compressed logical channel identifier is formulated. A communication that includes the compressed header is transmitted to the receiving device. In another example embodiment, a method is performed by a receiving device to decode a header having a reduced size. A mapping and a communication including a compressed header are received. A compressed logical channel identifier is extracted from the compressed header. A logical channel identifier is recovered from the compressed logical channel identifier using the mapping.

Abstract: Network node (110) and method (600) in a network node (110), for admission control of an additional radio access bearer based on load of control channel elements on a control channel, assigned by a scheduler (700) comprised in the network node (110). The method (600) comprises assigning (601), by the scheduler (700), control channel elements on the control channel for already admitted radio access bearers. Further, a first and a second load of the control channel is computed (606, 607) based on the usage of assigned control channel elements subframes on which both downlink assignments and uplink grants are enabled, and on which downlink assignments are enabled, respectively. If any of the first or second loads exceeds a respective threshold value, the radio access bearer to be admitted is rejected (609A).

Abstract: The embodiments herein relate to a method in a base station for communicating with a user equipment in the communication network. The base station is configured to communicate with the user equipment according to a selectable of at least two user equipment categories. Based on information about a selected user equipment category, the base station determines a first number of maximum transmission layers supported by the base station. The base station communicates with the user equipment according to up to the determined first number of maximum transmission layers and according to the selected user equipment category.

Abstract: The embodiments herein relate to a method in a base station for communicating with a user equipment in the communication network. The base station is configured to communicate with the user equipment according to a selectable of at least two user equipment categories. Based on information about a selected user equipment category, the base station determines a first number of maximum transmission layers supported by the base station. The base station communicates with the user equipment according to up to the determined first number of maximum transmission layers and according to the selected user equipment category.

Abstract: In compression of packet data headers the compressor side (100) in a point-to-multipoint connection transmits (301) a message announcing a particular service. The entities (200) receiving the announcement message are adapted to respond to the message and based on the response message(s) (305) the compressor can adapt the compression scheme used. In particular the compressor may compress (315) or not compress (311) the header of the packet data header.

Abstract: Teachings presented herein provide reduced computational complexity and/or memory requirements for a mobile terminal to determine the power backoff required for a multi-carrier uplink signal. In particular, the mobile terminal determines whether its power headroom falls below a pre-defined power headroom threshold, indicating that it is headroom limited. If so, it quantizes power allocated to each carrier of the multi-carrier uplink signal according to a pre-defined quantization policy. In doing so, the mobile terminal thereby reduces the possible configurations that may be selected for the multi-carrier uplink signal. Thus, in one embodiment, the mobile terminal stores the required backoff in a look-up table for only the configurations that may be selected when the mobile terminal is headroom limited. This relieves the memory requirements of the mobile terminal as compared to storing the required backoff for all possible configurations of the multi-carrier uplink signal.

Abstract: The present invention relates to methods and arrangements that enable continuous adaptive control of the number of autonomous HARQ retransmissions. This is achieved by a solution, where the UE and the radio base station are using a number of autonomous HARQ retransmissions that can be adjusted based on observations in the UE and/or the radio base station. What is observed is the amount of HARQ retransmissions needed for the radio base station to correctly decode the latest received data packet(s).

Abstract: The method and arrangement according to the present invention relates to of scheduling and coding in communication systems utilizing automatic repeat request (ARQ) and/or multihop scheduling and forwarding. According to the inventive method the receiving nodes selectively stores received information, also overheard information, as a priori information and feed back information about their respective stored a priori information to a sending node. The sending node forms composite data packets by jointly encoding and scheduling multiple data packets, which composite data packets are transmitted to receiving nodes. Upon receiving a composite data packet the receiving nodes uses their stored a priori information in the process of extracting data for themselves from the composite data packets.