Systems, apparatuses, and methods for lightweight over-the-air signaling mechanisms in data communications

1. A user equipment (UE) comprising:

an interface configured to communicate with an eNodeB; and

circuitry configured to:

transition from a connected mode to an idle mode;

configure the interface to transmit a lightweight connection request message to the eNodeB to request a connection after the transition from the connected mode to the idle mode;

configure the interface to receive at least one of: a response message from the eNodeB indicating a rejection of the lightweight connection request message; or a lightweight connection setup and resource allocation response message from the eNodeB including configuration information for a lightweight connection data radio bearer (DRB); and

configure the interface to exchange at least one of uplink or downlink data with the eNodeB via the DRB in response to the reception of the lightweight connection setup and resource allocation response message from the eNodeB;

wherein one or more of security context information, radio parameter information, or bearer information associated with the lightweight connection setup and resource allocation response message received from the eNodeB is stored in the UE prior to the transition from the connected mode to the idle mode.

2. The UE of claim 1 , wherein the connection comprises at least one of a device-to-device (D2D) or a machine-to-machine (M2M) communication connection.

3. The UE of claim 2 , wherein the M2M communication connection comprises a machine type communication (MTC) connection for exchanging data with at least one of an MTC server or device via a public land mobile network (PLMN).

4. The UE of claim 1 , wherein the connection comprises an Internet of Things (IOT) connection.

5. The UE of claim 1 , wherein the lightweight connection request message comprises a modified Radio Resource Control (RRC) Connection Request (RRCConnectionRequest) message.

6. The UE of claim 5 , wherein the RRCConnectionRequest message is modified via an Establishment Clause field to indicate the message comprises a lightweight connection request.

7. The UE of claim 5 , wherein the RRCConnectionRequest message is modified via a spare information element (IE) field to indicate the message comprises a lightweight connection request.

8. The method of claim 5 , wherein the RRCConnectionRequest message is modified via a criticalExtensionsFuture field to indicate the message comprises a lightweight connection request.

9. The UE of claim 1 , wherein the lightweight connection request message comprises a message class specific to lightweight connection requests.

10. The UE of claim 1 , wherein a lightweight connection radio bearer configuration used is based on UE category.

11. An eNodeB comprising:

an interface configured to communicate with a user equipment (UE); and

circuitry configured to:

configure the interface to receive a lightweight connection request from the UE;

configure the interface to forward the lightweight connection request to a network control entity of an Evolved Packet Core (EPC);

configure the interface to receive a message from the network control entity comprising at least one of:

a message indicating a rejection of the lightweight connection request; or

a resource allocation message including configuration information for a lightweight connection data radio bearer (DRB) for use in a lightweight connection, an S1 tunnel identification, and security context information;

generate a lightweight connection response message for the lightweight connection request based on the message received from the network control entity; and

configure the interface to transmit the response message to the UE,

wherein the received lightweight connection request is associated with a transition of a status of the UE from idle to active, and

wherein UE-specific information is stored at the eNodeB after the transition of the status of the UE from active to idle, the UE-specific information including one or more of a UE identity (ID), a transaction ID, UE state information, an E-UTRAN Radio Access Bearer ID (E-RAB ID), or UE-associated logical S1 security information.

12. The eNodeB of claim 11 , wherein the configuration information for the lightweight connection DRB comprises configuration information used for any lightweight connection request received by the eNodeB, including one or more of a logical channel identity, a poll data unit (PDU), a pollByte parameter, a prioritized bit rate, or logical channel group settings.

13. The eNodeB of claim 11 , wherein the configuration information for the lightweight connection DRB is based, at least in part, on the stored UE-specific information.

14. The eNodeB of claim 11 , wherein the message indicating the rejection of the lightweight connection request includes a request for at least one of re-configuration or refresh of the stored UE-specific information utilizing a legacy connection process.

15. The eNodeB of claim 11 , wherein the circuitry is further configured to:

configure the interface to transmit the stored UE-specific information to a target cell in response to a UE handover to the target cell.

16. The eNodeB of claim 11 , wherein the message indicating the rejection of the lightweight connection request includes an indication corresponding to a level of network congestion.

17. The eNodeB of claim 11 , wherein the message indicating the rejection of the lightweight connection request includes an indication of non-authorization of the UE for lightweight connections.

18. The eNodeB of claim 11 , wherein the received lightweight connection request comprises a Radio Resource Control (RRC) Connection Request (RRCConnectionRequest) message, and the response message for the lightweight connection request comprises an RRC Connection Reject (RRCConnectionReject) message.

19. The eNodeB of claim 11 , wherein the circuitry is further configured to:

share UE-specific context across multiple cells within an area comprising the eNB to use when the UE has a low mobility.

20. The eNodeB of claim 11 , wherein the circuitry is further configured to:

reject the lightweight connection request in response to the UE having switched eNodeBs or cells while in an idle state.

21. The eNodeB of claim 11 , wherein the lightweight connection response message signals, in an information element, a reason for the inability to use lightweight communication protocols.

22. The eNodeB of claim 11 , wherein the circuitry is further configured to:

provide different lightweight connection response messages to indicate to the UE different reasons for an inability to use lightweight communication protocols.

23. The eNodeB of claim 22 , wherein the different lightweight connection response messages at least one of:

differentiate between low level parameters to be re-configured or

indicate that security is to be checked.