Abstract: A network node is configured for transmitting a mobile-terminated early data transmission during a random-access procedure. The network node transmits a page having a contention-free preamble corresponding to an identity associated with a wireless device to be paged. The identity may be a Serving Temporary Mobile Subscriber Identity, S-TMSI, or a resume identity that identifies a suspended Radio Resource Control, RRC, connection. The network node then receives, as part of the random-access procedure, a Msg1 transmission that comprises the contention-free preamble. The network node next transmits, as part of the random-access procedure, a Msg2 transmission to the wireless device associated with the identity corresponding to the contention-free preamble. The Msg2 transmission includes a signaling message and downlink data.

Abstract: A method for improving data transmission security at a user equipment comprises receiving, from a source network node, a connection release message including instructions for computing a hash value for data to be included in a connection request message; computing the hash value based on the instructions included in the connection release message; calculating a token based on the hash value, and sending, to a target network node, the connection request message including the token. The method may further forward the data from the target network node directly to a gateway after the token has been verified. The method may reduce a signaling overhead by having a fixed-size hash value for data. Furthermore, the method may improve a transmission security by including the token in an RRC message, in which the token is calculated based on the hash value representing the data.

Abstract: According to some embodiments, a method for early data transmission (EDT) performed by a wireless device comprises: assembling a random access message 3 that includes uplink data for random access EDT; transmitting the random access message 3 to a network node; receiving a random access message 4 from the network node; determining whether the random access message 4 includes a successful integrity check indicating that the network node successfully received the uplink data in random access message 3; and upon determining the random access message 4 includes a successful integrity check, discarding transmission protocol information corresponding to the uplink data in random access message 3.

Abstract: According to some embodiments, a method for early data transmission performed by a wireless device comprises: obtaining, from a non-access stratum (NAS) communication layer, an initial NAS protocol data unit (PDU) for early data transmission; determining, by a radio resource control (RRC) communication layer, to initiate early data transmission based at least in part on a size of the initial NAS PDU; and transmitting an early data transmission including the initial NAS PDU.

Abstract: A communication system for resuming a connection comprises a user equipment (UE) and network nodes. A first network node is configured to prepopulate a UE context, and send, to a second network node, the UE context. The second network node is configured to receive, from the first network node, the UE context, and send, to a UE, a resume request message including a freshness parameter and the UE context. The UE is configured to receive, from the second network node, a resume request message including the freshness parameter and the UE context, generate an authentication token based on the freshness parameter and the UE context, and send, to the second network node, a resume response message including the authentication token. The communication system provides a freshness parameter and a prepopulated UE context to secure and facilitate resume procedure against replay attacks.

Abstract: According to certain embodiments, a method is performed by a network node for secure handling of early data transmission (EDT) during Random Access (RA) procedure before Radio Resource Control (RRC) setup is complete. The method includes receiving, from a wireless device, a RRC message comprising a resume connection request and data. Based on stored security information, the network node determines that the RRC message is suspicious. In response to determining that the RRC message is suspicious, the network node takes an action.

Abstract: A base station (110)transmits system information that indicates to a wireless device (120) that the wireless device (120) is permitted to transmit respective blocks stored at the wireless device (120) during and after a random access procedure (200). The wireless device (120) performs the random access procedure (200) to the base station (110). The wireless device (120) transmits a first block of data stored at the wireless device (120) to the base station (110) during the random access procedure (200) while withholding a second block of data stored at the wireless device (120) from transmission to the base station (110) until after completion of the random access procedure (200). The base station (110), receives the blocks of data during and after the random access procedure (200), respectively.

Abstract: A method for allocating a resource grant at a network node comprises receiving, from a user equipment (UE), a preamble message; providing, to the UE, at least two uplink resource grants in a system information message, wherein the at least two uplink resource grants have different sizes and are overlapping; and receiving, from the UE, a transmission via a first uplink resource grant selected from the at least two uplink resource grants. The method provides multiple and flexible grants for the UE to select a corresponding grant to perform an uplink transmission.

Abstract: A base station (110) enables a wireless device (120) (e.g., user equipment) to transmit user data on an uplink (130) during random access. The base station (110) transmits a resource grant indicating a plurality of options from which the wireless device (120) is permitted to select for use in transmitting the user data on the uplink (130) during random access. Each respective option comprises a transport block size; and a number of resource units and/or physical resource blocks. The wireless device (120) receives the resource grant, and transmits the user data on the uplink (130) during random access to the base station (110) according to at least one of the options.

Abstract: A method is provided for use in a wireless device. The method comprises determining a connection request and uplink data to transmit in response to a random-access response received from a network node. The method further comprises generating security information based at least in part on the uplink data. The method further comprises transmitting a radio transmission in response to the random-access response. The radio transmission comprises the connection request and the uplink data secured by the security information.

Abstract: A wireless device (14) is configured for use in a wireless communication system. The wireless device (14) is configured to transmit signaling (18A, 18C) 5 indicating whether or not the wireless device (14) is capable of receiving user data during a random access procedure (20). The signaling may for instance indicate whether or not the wireless device (14) is capable of receiving user data over a user plane during a random access procedure (20), e.g., by indicating whether or not the wireless device (14) supports early data for cellular internet of things, CIoT, Evolved 10 Packet System, EPS, user plane (UP) optimization. Regardless, the wireless device (14) may also receive user data during the random access procedure (20) in accordance with said signaling.