FIELD

The subject matter disclosed herein relates generally to wireless communications and more particularly relates to system information for changing a configuration.

BACKGROUND

The following abbreviations are herewith defined, at least some of which are referred to within the following description: Third Generation Partnership Project (“3GPP”), Positive-Acknowledgment (“ACK”), Binary Phase Shift Keying (“BPSK”), Clear Channel Assessment (“CCA”), Cyclic Prefix (“CP”), Channel State Information (“CSI”), Common Search Space (“CSS”), Discrete Fourier Transform Spread (“DFTS”), Downlink Control Information (“DCI”), Downlink (“DL”), Downlink Pilot Time Slot (“DwPTS”), Enhanced Clear Channel Assessment (“eCCA”), Enhanced Mobile Broadband (“eMBB”), Evolved Node B (“eNB”), European Telecommunications Standards Institute (“ETSI”), Frame Based Equipment (“FBE”), Frequency Division Duplex (“FDD”), Frequency Division Multiple Access (“FDMA”), Guard Period (“GP”), Hybrid Automatic Repeat Request (“HARQ”), Internet-of-Things (“IoT”), Licensed Assisted Access (“LAA”), Load Based Equipment (“LBE”), Listen-Before-Talk (“LBT”), Long Term Evolution (“LTE”), Multiple Access (“MA”), Modulation Coding Scheme (“MCS”), Machine Type Communication (“MTC”), Multiple Input Multiple Output (“MIMO”), Multi User Shared Access (“MUSA”), Narrowband (“NB”), Negative-Acknowledgment (“NACK”) or (“NAK”), Next Generation Node B (“gNB”), Non-Orthogonal Multiple Access (“NOMA”), Orthogonal Frequency Division Multiplexing (“OFDM”), Primary Cell (“PCell”), Physical Broadcast Channel (“PBCH”), Physical Downlink Control Channel (“PDCCH”), Physical Downlink Shared Channel (“PDSCH”), Pattern Division Multiple Access (“PDMA”), Physical Hybrid ARQ Indicator Channel (“PHICH”), Physical Random Access Channel (“PRACH”), Physical Resource Block (“PRB”), Physical Uplink Control Channel (“PUCCH”), Physical Uplink Shared Channel (“PUSCH”), Quality of Service (“QoS”), Quadrature Phase Shift Keying (“QPSK”), Radio Resource Control (“RRC”), Random Access Procedure (“RACH”), Random Access Response (“RAR”), Reference Signal (“RS”), Resource Spread Multiple Access (“RSMA”), Round Trip Time (“RTT”), Receive (“RX”), Sparse Code Multiple Access (“SCMA”), Scheduling Request (“SR”), Single Carrier Frequency Division Multiple Access (“SC-FDMA”), Secondary Cell (“SCell”), Shared Channel (“SCH”), Signal-to-Interference-Plus-Noise Ratio (“SINR”), System Information Block (“SIB”), Transport Block (“TB”), Transport Block Size (“TBS”), Time-Division Duplex (“TDD”), Time Division Multiplex (“TDM”), Transmission Time Interval (“TTI”), Transmit (“TX”), Uplink Control Information (“UCI”), User Entity/Equipment (Mobile Terminal) (“UE”), Uplink (“UL”), Universal Mobile Telecommunications System (“UMTS”), Uplink Pilot Time Slot (“UpPTS”), Ultra-reliability and Low-latency Communications (“URLLC”), and Worldwide Interoperability for Microwave Access (“WiMAX”). As used herein, “HARQ-ACK” may represent collectively the Positive Acknowledge (“ACK”) and the Negative Acknowledge (“NAK”). ACK means that a TB is correctly received while NAK means a TB is erroneously received.

In certain wireless communications networks, some system information may be transmitted and/or received more often than is necessary. In some configurations, indexes and/or identifiers may be transmitted in system information and used by UEs to enable the UEs to avoid reacquisition of already stored system information.

In certain configurations, there may be a large number of indexes and/or identifiers. For example, each system information block or collection of system information blocks may include a large number of parameters. A given network may use particular values of each parameter to configure the UEs in the network at a given point of time. An index and/or identifier for each possible configuration of parameters may be very large. In certain configurations, UEs may store a configuration corresponding to each index and/or identifier. This may take a large amount of storage space for the UEs. Moreover, a large load may be placed on a network transmitting each configuration corresponding to each index and/or identifier and UEs may store a large number of configurations taking up considerable storage space. In various configurations, there may be a small number of indexes and/or identifiers. In such configurations, there may be a limited number of configurations available to UEs.

BRIEF SUMMARY

Apparatuses for receiving system information for changing a configuration are disclosed. Methods and systems also perform the functions of the apparatus. In one embodiment, the apparatus includes a receiver that: receives first system information for a first configuration; and receives second system information for a second configuration based on the first configuration. In various embodiments, the second system information includes changes to the first configuration without repeating information common to the first and second configurations.

In one embodiment, the first system information includes a system information block. In a further embodiment, the second system information includes changes to parameter values of the system information block. In certain embodiments, the second system information includes additional parameters to those in the system information block. In various embodiments, the second system information indicates that it is based on the first system information. In some embodiments, the first system information, the second system information, or some combination thereof is discarded after a predetermined period of time.

A method for receiving system information for changing a configuration, in one embodiment, includes receiving first system information for a first configuration. In various embodiments, the method includes receiving second system information for a second configuration based on the first configuration. In certain embodiments, the second system information includes changes to the first configuration without repeating information common to the first and second configurations.

In one embodiment, an apparatus includes a transmitter that transmits first system information for a first configuration. In certain embodiments, the first configuration includes multiple system information blocks. In various embodiments, the transmitter transmits second system information indicating system information blocks of the multiple system information blocks that have a second configuration available to be transmitted. In some embodiments, the second configuration is based on the first configuration and includes changes to the first configuration without repeating information common to the first and second configurations.

In one embodiment, the second system information includes a list of system information blocks that are not included in the first system information. In a further embodiment, the second system information includes scheduling information for system information blocks of the list of system information blocks. In certain embodiments, the second system information includes scheduling information for information corresponding to the second configuration of the indicated system information blocks of the multiple system information blocks that have the second configuration available to be transmitted. In various embodiments, the second system information includes information indicating whether the second configuration for the indicated system information blocks of the multiple system information blocks is broadcast by default, broadcast by demand, or some combination thereof.

In some embodiments, the transmitter transmits third system information indicating the second configuration for the indicated system information blocks of the multiple system information blocks. In one embodiment, the third system information includes changes to parameter values of the indicated system information blocks of the multiple system information blocks. In certain embodiments, the third system information includes additional parameters to those of the indicated system information blocks of the multiple system information blocks. In various embodiments, the first system information, the second system information, the third system information, or some combination thereof is discarded after a predetermined period of time. In some embodiments, the multiple system information blocks include a first system information block of a first type and a second system information block of the first type, and the first and second system information blocks are different from one another.

In one embodiment, the second system information includes scheduling information for system information blocks broadcast regularly, system information blocks not broadcast regularly, system information blocks using the first configuration without the second configuration, system information blocks using the first configuration with the second configuration, or some combination thereof. In certain embodiments, the second system information includes a two-bit indication for each system information block indicating whether the respective system information block is broadcast regularly, not broadcast regularly, uses the first configuration without the second configuration, or uses the first configuration with the second configuration.

A method for transmitting system information for changing a configuration, in one embodiment, includes transmitting first system information for a first configuration. In some embodiments, the first configuration includes multiple system information blocks. In various embodiments, the method includes transmitting second system information indicating system information blocks of the multiple system information blocks that have a second configuration available to be transmitted. In certain embodiments, the second configuration is based on the first configuration and includes changes to the first configuration without repeating information common to the first and second configurations.

