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WO2018060903A1 - Distribution d'informations de système basée sur un indice amélioré - Google Patents

Distribution d'informations de système basée sur un indice amélioré Download PDF

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Publication number
WO2018060903A1
WO2018060903A1 PCT/IB2017/055938 IB2017055938W WO2018060903A1 WO 2018060903 A1 WO2018060903 A1 WO 2018060903A1 IB 2017055938 W IB2017055938 W IB 2017055938W WO 2018060903 A1 WO2018060903 A1 WO 2018060903A1
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WIPO (PCT)
Prior art keywords
broadcast channel
wireless device
index element
sequence
system information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2017/055938
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English (en)
Inventor
Pål FRENGER
Johan Rune
Stefan Wager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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Filing date
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Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of WO2018060903A1 publication Critical patent/WO2018060903A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present disclosure relates, in general, to wireless communications and, more particularly, to enhanced index based system information distribution.
  • the 5G-NR proposal consists of a two-step mechanism for transmitting access information, consisting of a system information block table (SIB -table) containing a collection of system information block configurations (SIBs) and a synchronization signal (SS) providing an index (SSI) which is used to select a certain configuration in the SIB -table, defining the system information.
  • SIB -table system information block table
  • SIBs system information block configurations
  • SS synchronization signal
  • the SSI can also optionally be accompanied with a data container denoted physical broadcast channel (PBCH).
  • PBCH physical broadcast channel
  • MIB master information block
  • the content of the SIB-table is assumed to be known by the user equipment (UE) when performing a random access attempt.
  • the UE has a stored copy of a previously acquired SIB-table, so that it only needs to receive the SS and determine its index (i.e., SSI) to know which configuration it should use when accessing the network.
  • SSI its index
  • FIGURE 1 illustrates an example of the proposed system information acquisition for 5G-NR.
  • two network nodes 115a and 115b and a wireless device 110 e.g., a UE
  • a wireless device 110 e.g., a UE
  • Each network node 115 e.g., one of an evolved NodeB (eNB), gNB, Transmission Reception Point (TRP), or radio base station (RBS)
  • eNB evolved NodeB
  • TRP Transmission Reception Point
  • RBS radio base station
  • Network node 115a transmits SSi
  • network node 115b transmits SS2.
  • PBCH Physical Broadcast Channel
  • network node 115a transmits SSi together with MIBi
  • network node 115b transmits SS2 together with MIB2, as indicted by the ovals labelled "SSi + MIBi transmission” and "SS2 + MIB2 transmission” in FIGURE 1.
  • wireless device 110 By reading the MIB, wireless device 110 receives information on how to receive the SIB-table.
  • the SIB-table may be transmitted using a broadcast format such as single frequency network (SFN) transmission, as depicted by the oval with the label SIB-table transmission in the example of FIGURE 1.
  • SFN single frequency network
  • UE 110 may receive other system information (e.g., by a dedicated transmission) after initial access is established, as depicted by the oval labelled "Additional SI transmission" in the example of FIGURE 1.
  • the system signature index may be communicated to the wireless device in different ways.
  • either the SSI is the index of the SS or the SSI is explicitly signalled in the MIB.
  • the SSI is the index of the SS.
  • Such an approach is costly in terms of additional configuration signalling, additional implementation complexity in the wireless device, and additional delay.
  • a cell needs to have more than one system information variant (for example, to enable different PRACH timing windows in different beams), there is a need to have more than one SS in that cell.
  • the method comprises receiving one or more transmissions from a network node, the one or more transmissions comprising a first sequence and a broadcast channel associated with the first sequence.
  • the method comprises determining a first index element based on the first sequence.
  • the method comprises determining a second index element based on information on the broadcast channel.
  • the method comprises obtaining, based on the first index element and the second index element, an index value.
  • the method comprises determining system information using the obtained index value.
  • the method may comprise accessing a network associated with the network node using the determined system information.
  • obtaining an index value may comprise deriving the index value, wherein the derived index value is a function of the first index element and the second index element.
  • the function of the first index element and the second index element may be a concatenation of the first index element and the second index element.
  • the first sequence may be comprised in a synchronization signal.
  • the first index element may comprise a plurality of bits, and determining the first index element may comprise reading the first sequence comprised in the synchronization signal.
  • the broadcast channel may be associated with the first sequence due to one or more of: the synchronization signal implicitly defines time and frequency resources used for demodulation of the broadcast channel; and the synchronization signal is used as a demodulation reference signal for the broadcast channel.
  • the broadcast channel may be associated with the first sequence due to one or more of: the first index element is used to derive the demodulation reference signal of the broadcast channel; and the first sequence is used to derive a channel configuration of the broadcast channel.
  • the broadcast channel may comprise a physical broadcast channel
  • the second index element may comprise a plurality of explicit bits included in a master information block on the physical broadcast channel.
  • the method may comprise decoding the broadcast channel using the determined first index element.
  • system information may comprise system information for a cell associated with the network node. In certain embodiments, the system information may comprise system information for one of a plurality of beams associated with the network node. In certain embodiments, the system information may comprise information about a target cell to which the wireless device is to be handed over.
  • a wireless device comprising a receiver and processing circuitry coupled to the receiver.
  • the processing circuitry is configured to receive, via the receiver, one or more transmissions from a network node, the one or more transmissions comprising a first sequence and a broadcast channel associated with the first sequence.
  • the processing circuitry is configured to determine a first index element based on the first sequence.
  • the processing circuitry is configured to determine a second index element based on information on the broadcast channel.
  • the processing circuitry is configured to obtain, based on the first index element and the second index element, an index value.
  • the processing circuitry is configured to determine system information using the obtained index value.
  • a method in a network node comprises defining system information for one or more aspects of wireless communication between the network node and a wireless device.
  • the method comprises transmitting a first sequence to the wireless device, the first sequence enabling the wireless device to determine a first index element based on the first sequence.
  • the method comprises transmitting a broadcast channel associated with the first sequence to the wireless device, the broadcast channel enabling the wireless device to determine a second index element based on information on the broadcast channel, wherein the first index element and the second index element enable the wireless device to obtain an index value indicative of the defined system information.
  • the index value may be a function of the first index element and the second index element.
  • the function of the first index element and the second index element is a concatenation of the first index element and the second index element.
  • transmitting the first sequence may comprise transmitting a synchronization signal comprising the first sequence.
  • the first index element may comprise a plurality of bits that can be determined by reading the first sequence comprised in the synchronization signal.
  • the broadcast channel may be associated with the first sequence due to one or more of: the synchronization signal implicitly defines time and frequency resources used for demodulation of the broadcast channel; and the synchronization signal is used as a demodulation reference signal for the broadcast channel.
  • the broadcast channel may be associated with the first sequence due to one or more of: the first index element is used to derive the demodulation reference signal of the broadcast channel; and the first sequence is used to derive a channel configuration of the broadcast channel.
  • the broadcast channel may comprise a physical broadcast channel, and the second index element comprises a plurality of explicit bits included in a master information block on the physical broadcast channel.
  • system information may comprise system information for a cell associated with the network node. In certain embodiments, the system information may comprise system information for one of a plurality of beams associated with the network node. In certain embodiments, the system information may comprise information about a target cell to which the wireless device is to be handed over.
  • a network node comprising a transmitter and processing circuitry coupled to the transmitter.
  • the processing circuitry is configured to define system information for one or more aspects of wireless communication between the network node and a wireless device.
  • the processing circuitry is configured to transmit, via the transmitter, a first sequence to the wireless device, the first sequence enabling the wireless device to determine a first index element based on the first sequence.
  • the processing circuitry is configured to transmit, via the transmitter, a broadcast channel associated with the first sequence to the wireless device, the broadcast channel enabling the wireless device to determine a second index element based on information on the broadcast channel, wherein the first index element and the second index element enable the wireless device to obtain an index value indicative of the defined system information.
  • Certain embodiments of the present disclosure may provide one or more technical advantages. For example, certain embodiments may advantageously enable changes to system information without causing the wireless device to lose synchronization or increasing the amount of time required for a wireless device to determine system information. As another example, certain embodiments may advantageously avoid the increased cost associated with using additional configuration signalling, increased implementation complexity in the UE, and additional delay. As still another example, certain embodiments may advantageously avoid the resource expense associated with signalling a large number of bits. As yet another example, certain embodiments may advantageously enable fast system information changes without changing the system synchronization signal and without signalling a large number of bits in the MIB. Other advantages may be readily apparent to one having skill in the art. Certain embodiments may have none, some, or all of the recited advantages.
  • FIGURE 1 illustrates an example of the proposed system information acquisition for 5G-NR
  • FIGURE 2 illustrates an example of how a wireless device acquires minimum system information enabling it to perform a PRACH transmission and receive a RAR, in accordance with certain embodiments
  • FIGURE 3 is a block diagram illustrating an embodiment of a network, in accordance with certain embodiments.
  • FIGURE 4 is a flow diagram of a method in a wireless device, in accordance with certain embodiments.
  • FIGURE 5 is a flow diagram of a method in a network node, in accordance with certain embodiments.
  • FIGURE 6 is a flow diagram of a method in a wireless device, in accordance with certain embodiments.
  • FIGURE 7 is a block schematic of an exemplary UE, in accordance with certain embodiments.
  • FIGURE 8 is a block schematic of an exemplary wireless device, in accordance with certain embodiments.
  • FIGURE 9 is a block schematic of an exemplary network node, in accordance with certain embodiments.
  • FIGURE 10 is a block schematic of an exemplary radio network controller or core network node, in accordance with certain embodiments.
  • FIGURE 11 is a block schematic of an exemplary wireless device, in accordance with certain embodiments.
  • FIGURE 12 is a block schematic of an exemplary network node, in accordance with certain embodiments. DETAILED DESCRIPTION
  • a network node e.g., a gNB or an eNB
  • the network node transmit a first sequence to the wireless device, the first sequence enabling the wireless device to determine a first index element based on the first sequence.
  • the network node transmits a broadcast channel associated with the first sequence to the wireless device, the broadcast channel enabling the wireless device to determine a second index element based on information on the broadcast channel, wherein the first index element and the second index element enable the wireless device to obtain an index value indicative of the defined system information.
  • a wireless device receives one or more transmissions from a network node, the one or more transmissions comprising a first sequence and a broadcast channel associated with the first sequence.
  • the wireless device determines a first index element based on the first sequence.
  • the wireless device determines a second index element based on information on the broadcast channel.
  • the wireless device obtains, based on the first index element and the second index element, an index value.
  • the wireless device determines system information using the obtained index value.
  • the wireless device accesses a network associated with the network node using the determined system information.
  • Certain embodiments of the present disclosure may provide one or more technical advantages. For example, certain embodiments may advantageously enable changes to system information without causing the wireless device to lose synchronization or increasing the amount of time required for a wireless device to determine system information. As another example, certain embodiments may advantageously avoid the increased cost associated with using additional configuration signalling, increased implementation complexity in the UE, and additional delay. As still another example, certain embodiments may advantageously avoid the resource expense associated with signalling a large number of bits. As yet another example, certain embodiments may advantageously enable fast system information changes without changing the system synchronization signal and without signalling a large number of bits in the MIB. Other advantages may be readily apparent to one having skill in the art. Certain embodiments may have none, some, or all of the recited advantages.
  • FIGURE 2 illustrates an example of how a wireless device acquires minimum system information enabling it to perform a Physical Random Access Channel (PRACH) transmission and receive a Random Access Response (RAR). More particularly, FIGURE 2 illustrates the exemplary signals and how the wireless device uses them over time (depicted on the X-axis) to acquire configuration data needed to perform the random access procedure, starting with the SS and ending with the reception of the RAR.
  • PRACH Physical Random Access Channel
  • RAR Random Access Response
  • the first step for a wireless device aims to perform initial access is to search for and detect SS 205 on a suitable carrier frequency.
  • the wireless device synchronizes with the network and can, from SS 205, derive how to receive MIB 210.
  • MIB 210 may be broadcast on resources whose relation to SS 205 is fixed and may also be scrambled with a sequence that can be derived from SS 205.
  • NR-PBCH physical broadcast channel not yet fully defined by the 3 rd Generation Partnership Project (3GPP). This channel is somewhat similar to the corresponding PBCH for Long Term Evolution (LTE).
  • LTE Long Term Evolution
  • the content of the MIB in NR is, however, different from the content of the MIB in LTE, but the same term will be used herein to indicate a piece of information that is transmitted in a physical channel associated with the system synchronization signal.
  • MIB 210 contains information that aids the wireless device in validating any earlier- stored SIB parameters.
  • the information contained in MIB 210 may be a ValueTag that aids the wireless device in validating any earlier stored SIB parameters.
  • FIGURE 2 illustrates the information as a ValueTag, the information could be in other forms.
  • the information could be in the form of a version number or a hash.
  • MIB 210 also contains configuration data instructing the wireless device how to receive broadcast SIBs 215.
  • the SIBs transmission configuration data may include, for example, time and frequency resources, Demodulation Reference Signals (DMRS), scrambling, and other suitable information.
  • DMRS Demodulation Reference Signals
  • the SIBs transmission configuration data may include an index/sequence of an SS that is transmitted in conjunction with SIBs 215.
  • the SIB information (or part of the SIB information) is structured in the form of a table where only one or a set of entries in the table is to be applied (while the information in the other entries in the table are applicable in other cells)
  • the wireless device may also derive a table index from SS 205/MIB 210, which points out the applicable entry (or set of entries).
  • Broadcast SIBs 215 provide at least the minimum configuration data (minimum system information) to allow the wireless device to perform initial access. Hence, when the wireless device receives the SIBs, it receives configuration data for PRACH 220.
  • the configuration data for PRACH 220 may include, for example, time and frequency resources.
  • the information in SIBs 215 includes configuration data enabling the wireless device to receive RAR 225.
  • This configuration data configures a physical channel for RAR 225, with the main component being an SS to be transmitted in conjunction with RAR 225, allowing the wireless device to detect and decode RAR 225.
  • a dedicated SS would facilitate transmitting RAR 225 from another (silent) antenna port than SS 205.
  • the dedicated synchronization signal would also be useful for deployments in unlicensed frequency bands, where transmission of RAR 225 may be delayed and the timing unknown to the wireless device.
  • the dedicated SS would help the wireless device to tune the Automatic Gain Control (AGC) if high gain beamforming is used for RAR 225.
  • AGC Automatic Gain Control
  • the wireless device may initiate the initial access procedure by transmitting a random access preamble on PRACH 220 and receiving the subsequent RAR 225 in accordance with the configuration data in the SIBs.
  • FIGURE 3 is a block diagram illustrating an embodiment of a network 300, in accordance with certain embodiments.
  • Network 300 includes one or more wireless devices 110 and one or more network node(s) 115 (including network nodes 115a and 115b in the example embodiment of FIGURE 3).
  • Wireless device 110 comprises processor 820, memory 830, interface 810 and antenna 840.
  • Network node 115a comprises processor 920, memory 930, interface 910/940, and antenna 950. These components may work together in order to provide network node and/or wireless device functionality, such as providing wireless connections in network 300.
  • wireless devices 110 may communicate with network nodes 115 over a wireless interface.
  • wireless device 110 may transmit wireless signals 125a, 125b to one or more of network nodes 115, and/or receive wireless signals 125a, 125b from one or more of network nodes 115.
  • Wireless signals 125a, 125b may contain voice traffic, data traffic, control signals, and/or any other suitable information.
  • an area of wireless signal coverage associated with a network node 115 may be referred to as a cell.
  • wireless device 110 may have device-to-device (D2D) capability.
  • D2D device-to-device
  • network nodes 115 may interface with a radio network controller.
  • the radio network controller may control network nodes 115 and may provide certain radio resource management functions, mobility management functions, and/or other suitable functions. In certain embodiments, the functions of the radio network controller may be included in network node 115.
  • the radio network controller may interface with a core network node. In certain embodiments, the radio network controller may interface with the core network node via an interconnecting network 320.
  • Interconnecting network 320 may refer to any interconnecting system capable of transmitting audio, video, signals, data, messages, or any combination of the preceding.
  • Interconnecting network 320 may include all or a portion of one or more Internet Protocol (IP) networks, public switched telephone networks (PSTNs), packet data networks, optical networks, public or private data networks, local area networks (LANs), wireless local area networks (WLANs), wired networks, wireless networks, metropolitan area networks (MANs), wide area networks (WAN), a local, regional, or global communication or computer network such as the Internet, an enterprise intranet, or any other suitable communication links, including combinations thereof, to enable communication between devices.
  • IP Internet Protocol
  • PSTNs public switched telephone networks
  • WLANs wireless local area networks
  • MANs metropolitan area networks
  • WAN wide area networks
  • a local, regional, or global communication or computer network such as the Internet, an enterprise intranet, or any other suitable communication links, including combinations thereof, to enable communication between devices.
  • the core network node may manage the establishment of communication sessions and various other functionalities for wireless devices 110.
  • Wireless devices 110 may exchange certain signals with the core network node using the non-access stratum layer.
  • signals between wireless devices 110 and the core network node may be transparently passed through the RAN.
  • network nodes 115 may interface with one or more network nodes over an internode interface, such as, for example, an X2 interface.
  • example embodiments of network 300 may include one or more wireless devices 110, and one or more different types of network nodes 115 capable of communicating (directly or indirectly) with wireless devices 110.
  • Wireless devices 110 described herein can be any type of wireless device capable, configured, arranged and/or operable to communicate wirelessly with network nodes 115 and/or another wireless device. Communicating wirelessly may involve transmitting and/or receiving wireless signals using electromagnetic signals, radio waves, infrared signals, and/or other types of signals suitable for conveying information through air.
  • wireless devices may be configured to transmit and/or receive information without direct human interaction. For instance, a wireless device may be designed to transmit information to a network on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the network.
  • a wireless device may represent any device capable of, configured for, arranged for, and/or operable for wireless communication, for example radio communication devices.
  • wireless devices include, but are not limited to, UEs such as smart phones. Further examples include wireless cameras, wireless-enabled tablet computers, laptop-embedded equipment (LEE), laptop-mounted equipment (LME), USB dongles, and/or wireless customer-premises equipment (CPE).
  • Wireless device 110 may also be a radio communication device, target device, D2D UE, machine-type-communication (MTC) UE or UE capable of machine-to-machine (M2M) communication, low-cost and/or low-complexity UE, a sensor equipped with UE, or any other suitable devices.
  • MTC machine-type-communication
  • M2M machine-to-machine
  • wireless device 110 may represent a UE configured for communication in accordance with one or more communication standards promulgated by 3GPP, such as 3GPP's GSM, UMTS, LTE, and/or 5G standards.
  • 3GPP 3GPP's GSM, UMTS, LTE, and/or 5G standards.
  • a "UE” may not necessarily have a "user” in the sense of a human user who owns and/or operates the relevant device. Instead, a UE may represent a device that is intended for sale to, or operation by, a human user but that may not initially be associated with a specific human user.
  • Wireless device 110 may support D2D communication, for example by implementing a 3GPP standard for sidelink communication, and may in this case be referred to as a D2D communication device.
  • a wireless device may represent a machine or other device that performs monitoring and/or measurements, and transmits the results of such monitoring and/or measurements to another wireless device and/or a network node.
  • the wireless device may in this case be a M2M device, which may in a 3GPP context be referred to as a MTC device.
  • the wireless device may be a UE implementing the 3GPP narrow band internet of things (NB-IoT) standard.
  • NB-IoT narrow band internet of things
  • NB-IoT narrow band internet of things
  • a wireless device may represent a vehicle or other equipment that is capable of monitoring and/or reporting on its operational status or other functions associated with its operation.
  • Wireless device 110 as described above may represent the endpoint of a wireless connection, in which case the device may be referred to as a wireless terminal.
  • a wireless device as described above may be mobile, in which case it may also be referred to as a mobile device or a mobile terminal.
  • wireless device 110 may be any type of wireless endpoint, mobile station, mobile phone, wireless local loop phone, smartphone, user equipment, desktop computer, PDA, cell phone, tablet, laptop, VoIP phone or handset, which is able to wirelessly send and receive data and/or signals to and from a network node, such as network node 115 and/or other wireless devices.
  • Wireless device 110 comprises processor 820, memory 830, interface 810, and antenna 840.
  • the components of wireless device 110 are depicted as single boxes located within a single larger box, however in practice a wireless device may comprise multiple different physical components that make up a single illustrated component (e.g., memory 830 may comprise multiple discrete microchips, each microchip representing a portion of the total storage capacity).
  • Processor 820 may be a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and/or encoded logic operable to provide, either alone or in combination with other wireless device 110 components, such as memory 830, wireless device 110 functionality.
  • Such functionality may include providing various wireless features discussed herein, including any of the features or benefits disclosed herein.
  • Memory 830 may be any form of volatile or non- volatile memory including, without limitation, persistent storage, solid state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), removable media, or any other suitable local or remote memory component.
  • Memory 830 may store any suitable data, instructions, or information, including software and encoded logic, utilized by wireless device 110. Memory 830 may be used to store any calculations made by processor 820 and/or any data received via interface 810.
  • Interface 810 may be used in the wireless communication of signalling and/or data between wireless device 110 and network nodes 115.
  • interface 810 may perform any formatting, coding, or translating that may be needed to allow wireless device 110 to send and receive data from network nodes 115 over a wireless connection.
  • Interface 810 may also include a radio transmitter and/or receiver that may be coupled to or a part of antenna 840.
  • the radio may receive digital data that is to be sent out to network nodes 115 via a wireless connection.
  • the radio may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters.
  • the radio signal may then be transmitted via antenna 840 to network nodes 115.
  • Antenna 840 may be any type of antenna capable of transmitting and receiving data and/or signals wirelessly.
  • antenna 840 may comprise one or more omnidirectional, sector or panel antennas operable to transmit/receive radio signals between, for example, 2 GHz and 66 GHz.
  • antenna 840 may be able to transmit/receive signals outside this range.
  • an antenna 840 operating in a 5G system may support transmission/reception at lower frequencies (e.g., as low as 700 MHz).
  • antenna 840 may be considered a part of interface 810 to the extent that a wireless signal is being used.
  • network node refers to equipment capable, configured, arranged and/or operable to communicate directly or indirectly with a wireless device and/or with other equipment in the wireless communication network that enable and/or provide wireless access to the wireless device.
  • network nodes include, but are not limited to, access points (APs), in particular radio access points.
  • a network node may represent base stations (BSs), such as radio base stations.
  • BSs base stations
  • radio base stations include Node Bs, evolved Node Bs (eNBs), and gNBs.
  • Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and may then also be referred to as femto base stations, pico base stations, micro base stations, or macro base stations.
  • Network node also includes one or more (or all) parts of a distributed radio base station such as centralized digital units and/or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio.
  • RRUs remote radio units
  • RRHs Remote Radio Heads
  • Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio.
  • Parts of a distributed radio base stations may also be referred to as nodes in a distributed antenna system (DAS).
  • DAS distributed antenna system
  • a base station may be a relay node or a relay donor node controlling a relay.
  • network nodes include multi-standard radio (MSR) radio equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, Multi-cell/multicast Coordination Entities (MCEs), core network nodes (e.g., MSCs, MMEs, etc.), Operation and Maintenance (O&M) nodes, Operations Support System (OSS) nodes, Self-Organizing Network (SON) nodes, positioning nodes (e.g., Evolved Serving Mobile Location Center (E-SMLCs)), minimization of drive tests (MDTs), or any other suitable network node.
  • MSR multi-standard radio
  • RNCs radio network controllers
  • BSCs base station controllers
  • BTSs base transceiver stations
  • MCEs Multi-cell/multicast Coordination Entities
  • core network nodes e.g., MSCs, MMEs, etc.
  • OFM Operations
  • network nodes may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a wireless device access to the wireless communication network or to provide some service to a wireless device that has accessed the wireless communication network.
  • network node 115a comprises processor 920, memory 930, interface 910/940, and antenna 950. These components are depicted as single boxes located within a single larger box. In practice however, network node 115a may comprise multiple different physical components that make up a single illustrated component (e.g., interface 910/940 may comprise terminals for coupling wires for a wired connection and a radio transceiver for a wireless connection).
  • interface 910/940 may comprise terminals for coupling wires for a wired connection and a radio transceiver for a wireless connection).
  • network node 115a may be a virtual network node in which multiple different physically separate components interact to provide the functionality of network node 115a (e.g., processor 920 may comprise three separate processors located in three separate enclosures, where each processor is responsible for a different function for a particular instance of network node 115a).
  • network node 115a may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, a BTS component and a BSC component, etc.), which may each have their own respective processor, storage, and interface components.
  • network node 115a comprises multiple separate components (e.g., BTS and BSC components)
  • one or more of the separate components may be shared among several network nodes.
  • a single RNC may control multiple NodeB 's.
  • each unique NodeB and BSC pair may be a separate network node.
  • network node 115a may be configured to support multiple radio access technologies (RATs).
  • RATs radio access technologies
  • some components may be duplicated (e.g., separate memory 930 for the different RATs) and some components may be reused (e.g., the same antenna 950 may be shared by the RATs).
  • Processor 920 may be a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and/or encoded logic operable to provide, either alone or in conjunction with other network node 115a components, such as memory 930, network node 115a functionality.
  • processor 920 may execute instructions stored in memory 930.
  • Such functionality may include providing various wireless features discussed herein to one or more wireless devices, such as wireless device 110, including any of the features or benefits disclosed herein.
  • Memory 930 may comprise any form of volatile or non-volatile computer readable memory including, without limitation, persistent storage, solid state memory, remotely mounted memory, magnetic media, optical media, RAM, ROM, removable media, or any other suitable local or remote memory component. Memory 930 may store any suitable instructions, data or information, including software and encoded logic, utilized by network node 115a. Memory 930 may be used to store any calculations made by processor 920 and/or any data received via interface 910/940.
  • Network node 115a also comprises interface 910/940 which may be used in the wired or wireless communication of signalling and/or data between network node 115a, network 115b, and/or wireless device 110.
  • interface 910/940 may perform any formatting, coding, or translating that may be needed to allow network node 115a to send and receive data from network 115b over a wired connection.
  • Interface 910/940 may also include a radio transmitter and/or receiver that may be coupled to or a part of antenna 950.
  • the radio may receive digital data that is to be sent out to other network nodes or wireless devices via a wireless connection.
  • the radio may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters.
  • the radio signal may then be transmitted via antenna 950 to the appropriate recipient (e.g., wireless device 110).
  • Antenna 950 may be any type of antenna capable of transmitting and receiving data and/or signals wirelessly.
  • antenna 950 may comprise one or more omnidirectional, sector or panel antennas operable to transmit/receive radio signals between, for example, 2 GHz and 66 GHz.
  • antenna 950 may be able to transmit/receive signals outside this range.
  • an antenna 950 operating in a 5G system may support transmission/reception at lower frequencies (e.g., as low as 700 MHz).
  • An omni-directional antenna may be used to transmit/receive radio signals in any direction
  • a sector antenna may be used to transmit/receive radio signals from devices within a particular area
  • a panel antenna may be a line of sight antenna used to transmit/receive radio signals in a relatively straight line.
  • radio node is used generically to refer both to wireless devices and network nodes, as each is respectively described above.
  • network node and wireless device should be considered non- limiting and does in particular not imply a certain hierarchical relation between the two; in general “network node” could be considered as device 1 and “wireless device” device 2, and these two devices communicate with each other over some radio channel.
  • Example embodiments of wireless device 110, network nodes 115, and other network nodes are described in more detail below with respect to FIGURES 7-12.
  • FIGURE 3 illustrates a particular arrangement of network 300
  • network 300 may include any suitable number of wireless devices 110 and network nodes 115, as well as any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device (such as a landline telephone).
  • the wireless network 300 may comprise any number of wired or wireless networks, network nodes, base stations, controllers, wireless devices, relay stations, and/or any other components that may facilitate or participate in the communication of data and/or signals whether via wired or wireless connections.
  • network 300 may represent any type of communication, telecommunication, data, cellular, and/or radio network or other type of system.
  • the network 300 may be configured to operate according to specific standards or other types of predefined rules or procedures.
  • the wireless communication network may implement communication standards, such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), and/or other suitable 2G, 3G, 4G, or 5G standards; wireless local area network (WLAN) standards, such as the IEEE 802.11 standards; and/or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, and/or ZigBee standards.
  • GSM Global System for Mobile Communications
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • WLAN wireless local area network
  • WiMax Worldwide Interoperability for Microwave Access
  • Bluetooth and/or ZigBee standards.
  • the solutions described herein may be implemented in any appropriate type of system using any suitable components, particular embodiments of the described solutions may be implemented in a wireless network such as the example wireless communication network illustrated in FIGURE 3.
  • the wireless communication network provides communication and other types of services to one or more wireless devices.
  • the wireless communication network includes one or more instances of network nodes that facilitate the wireless devices' access to and/or use of the services provided by the wireless communication network.
  • the wireless communication network may further include any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device, such as a landline telephone.
  • a network node such as network node 115a, defines system information for one or more aspects of wireless communication between network node 115a and wireless device 110.
  • Network node 115a transmits a first sequence to wireless device 110.
  • the first sequence enables wireless device 110 to determine a first index element based on the first sequence.
  • the first sequence may be comprised in an SS.
  • network node 115a may transmit the first sequence by transmitting the SS comprising the first sequence.
  • Network node 115a also transmits a broadcast channel associated with the first sequence to wireless device 110.
  • the broadcast channel may be associated with the first sequence in a variety of ways.
  • the broadcast channel may be associated with the first sequence due to the SS implicitly defining time and frequency resources used for demodulation of the broadcast channel.
  • the broadcast channel may be associated with the first sequence due to the SS being used as a DMRS for the broadcast channel.
  • the broadcast channel may be associated with the first sequence due to the first index element being used to derive the DMRS of the broadcast channel.
  • the broadcast channel may be associated with the first sequence due to the first sequence being used to derive a channel configuration of the broadcast channel.
  • the broadcast channel enables wireless device 110 to determine a second index element based on information on the broadcast channel.
  • the first index element and the second index element enable wireless device 110 to obtain an index value indicative of the defined system information.
  • wireless device 110 receives the transmissions from network node 115a (i.e., the first sequence and the broadcast channel associated with the first sequence). Wireless device 110 determines a first index element based on the first sequence, and determines a second index element based on information on the broadcast channel.
  • the first sequence may be comprised in an SS.
  • the first index element may comprise a plurality of bits, and wireless device 110 may determine the first index element by reading the first sequence comprised in the SS.
  • the broadcast channel may comprise a physical broadcast channel
  • the second index element may comprise a plurality of explicit bits included in a master information block on the physical broadcast channel.
  • wireless device 110 may decode the broadcast channel using the determined first index element.
  • Wireless device 110 obtains, based on the first index element and the second index element, an index value. Wireless device 110 determines system information using the obtained index value. In certain embodiments, wireless device 110 accesses a network associated with network node 115a (e.g., network 300) using the determined system information.
  • network node 115a e.g., network 300
  • Wireless device 110 may obtain the index value in a variety of ways.
  • wireless device 110a may obtain the index value by deriving the index value.
  • the derived index value may be a function of the first index element and the second index element.
  • the function may be any suitable function.
  • the function of the first index element and the second index element may be a concatenation of the first index element and the second index element.
  • wireless device 110 may obtain the index value by applying the first index element and the second index element to a two-dimensional table in order to obtain the index value.
  • the system information may comprise system information for a cell associated with the network node.
  • wireless device 110 may read a SIB-table transmission (e.g., if the UE has not already done so).
  • Wireless device 110 may store the SIB-table.
  • Network node 115a transmits a first sequence in the form of an SS (including a physical cell identity (PCI)).
  • the SS may include a primary SS (PSS) and a secondary SS (SSS) from which the PCI may be determined.
  • PSS primary SS
  • SSS secondary SS
  • Network node 115a also transmits a broadcast channel (e.g., PBCH).
  • the broadcast channel may include a MIB.
  • the broadcast channel may be associated with the SS.
  • the broadcast channel may be transmitted together with the SS.
  • the SS and the broadcast channel may be related in the sense that: the SS implicitly defines the time and frequency resources to be used for PBCH demodulation; the SS is used as a demodulation reference signal for the PBCH; and/or the SS index (e.g., PCI) is used to derive a demodulation reference signal of the PBCH.
  • the SS index e.g., PCI
  • Wireless device 110 scans for SS transmissions from network nodes 115a and selects one of them (e.g., the strongest SS it receives, which in this example use case is the SS associated with network node 115a). Wireless device 110 determines the PCI as the first index element. In some cases, the PCI may be derived from an index of the SS. Using the knowledge of the PCI, wireless device 110 can decode the broadcast channel (e.g., PBCH in this example use case). In this first example use case, the PBCH contains a MIB that includes a second index element in a CELL_SI_CONFIG field. The CELL_SI_CONFIG may comprise a small number of bits in the MIB included on the broadcast channel.
  • PBCH contains a MIB that includes a second index element in a CELL_SI_CONFIG field.
  • the CELL_SI_CONFIG may comprise a small number of bits in the MIB included on the broadcast channel.
  • Wireless device 110 determines the CELL_SI_CONFIG element from the MIB.
  • the small number of bits in the MIB are used to indicate one variant of the system information.
  • different variants are allowed (e.g., 16 variants).
  • the MIB may contain 4 bits that are used to derive the index value (i.e., SSI in this example) as described in more detail below.
  • wireless device 110 obtains the index value
  • wireless device 110 may derive the index value (i.e., SSI) as a function of all or a sub-set of the bits from the index of the SS (denoted PCI in Equation 1 below) and the CELL_SI_CONFIG. This is shown in Equation 1 below:
  • SSI function (PCI, CELL_SI_CONFIG), (1) where SSI is the index value, PCI denotes the first index element (i.e., index of the SS (e.g., 10 bits)), and CELL_SI_CONFIG denotes the second index element (i.e., small number of bits (e.g., 4 bits) included in the MIB inside of the broadcast channel (i.e., PBCH in this example use case).
  • PCI denotes the first index element (i.e., index of the SS (e.g., 10 bits)
  • CELL_SI_CONFIG denotes the second index element (i.e., small number of bits (e.g., 4 bits) included in the MIB inside of the broadcast channel (i.e., PBCH in this example use case).
  • the function may be any suitable function.
  • the function may be a concatenation of the PCI bits and the CELL_SI_CONFIG bits.
  • the CELL_SI_CONFIG bits point out different sets of system information (for example, in a SIB- table) and can be used to modify any initial access parameter.
  • Other functions may be used. For example, one function could be to only use the M most significant bits in the PCI and concatenate those bits with the bits in the CELL_SI_CONFIG.
  • the function to apply may also be signalled in the broadcast channel (e.g., PBCH).
  • a bit field is created by operation of the function of the first index element and the second index element.
  • the bit field that is created by the function may be converted to an index value that wireless device 110 can use to select SIBs from the SIB-table that wireless device 110 has stored.
  • Wireless device 110 may then access the network in accordance with the derived system information.
  • the system information may comprise system information for one of a plurality of beams associated with the network node.
  • network node 115a may transmit a plurality of beams. Within a cell, there will be multiple beams. For example, a cell operating in high frequency bands (e.g., above 6 GHz) may have up to 64 beams. For mid-bands (e.g., between 3-6 GHz), the maximum number of beams will be 8, and for low bands (e.g., below 3 GHz), the maximum number of beams will be 4. To encode 64 beams six bits of information are needed to indicate which beam a wireless device is in. Each beam will have an index value indicative of the system information for that beam. To indicate this system information, network node 115a transmits an SS block index in each beam, and each beam will have a different SS block index.
  • network node 115a transmits a sequence (e.g., a DMRS), as well as a broadcast channel (e.g., PBCH) that includes a MIB containing additional information.
  • a sequence e.g., a DMRS
  • PBCH broadcast channel
  • a first index element is conveyed by the DMRS of the NR-PBCH.
  • the DMRS may indicate the first three bits of a total of six bits used as an index value.
  • wireless device 110 can first estimate which out of eight possible DMRS sequences that are most likely used as the DMRS sequence and this provides wireless device 110 with up to three bits of the SS Block index (also known as implicit bits of the SS Block index).
  • a second index element is conveyed in the PBCH through three explicit bits in the MIB.
  • the three implicit bits of the DMRS sequence and the three explicit bits in the PBCH enable wireless device 110 to obtain the index value indicative of beam index which is then used to determine the system information for that beam.
  • wireless device 110 may receive the SS block index including a sequence (e.g., DMRS) and the PBCH (which includes the MIB). Wireless device 110 uses the DMRS to decode the PBCH. For example, wireless device 110 may be aware of a fixed number of possible DMRS sequences (e.g., eight different DMRS sequence candidates) that can be used to decode the PBCH. Wireless device 110 attempts to decode the PBCH using one or more of the possible DMRS sequences. Once wireless device 110 has determined the correct DMRS, wireless device 110 determines the first index element as the three implicit bits indicated by the DMRS sequence.
  • DMRS a sequence
  • PBCH which includes the MIB
  • Wireless device 110 uses the DMRS to decode the PBCH.
  • wireless device 110 may be aware of a fixed number of possible DMRS sequences (e.g., eight different DMRS sequence candidates) that can be used to decode the PBCH. Wireless device 110 attempts to decode the PBCH using one or more
  • Wireless device 110 then decodes the PBCH, and is able to determine the second index element (i.e., the three explicit bits included in the MIB of the PBCH). Wireless device 110 obtains, based on the first index element and the second index element, the index value. For example, wireless device 110 may use a concatenation of the three bits indicated by the DMRS and the three explicit bits included in the MIB to obtain the index value. Wireless device 110 may then determine the system information for a beam using the obtained index value.
  • the second index element i.e., the three explicit bits included in the MIB of the PBCH.
  • each cell associated with a network node 115 may belong to a System Information Area ID. Some SIBs may be valid in the whole System Information Area, which includes a plurality of cells.
  • network node 115a transmits a sequence (e.g., a PCI) from which a first index element may be determined.
  • the PCI is directly derived from the sequence indexes of a primary and secondary synchronization signals (denoted NR-PSS and NR-SSS, respectively).
  • network node 115a transmits a broadcast channel that includes a second index element.
  • network node 115a may broadcast one or more Value Tag(s) related to one or more SIBs or system information messages containing multiple SIBs, and an SI Area ID associated with the cell. Together, the Value Tag and the System Information Area ID associated with the cell may make up the second index element.
  • the Value Tag and the System Information Area ID may be broadcasted as remaining minimum system information (RMSI) (scheduled on a physical downlink control channel (PDCCH) and transmitted on a physical downlink shared channel (PDSCH)).
  • RMSI remaining minimum system information
  • the channel used for the RMSI broadcast is associated with the PCI in that the channel configuration is derived from the PCI.
  • Wireless device 110 receives the sequence (i.e., PSS/SSS which provides the PCI in this third example use case) and the broadcasted Value Tag and the System Information Area ID. Wireless device 110 determines the PCI as the first index element, and determines the Value Tag and the System Information Area ID as the second index element. Wireless device 110 obtains an index value based on the PCI, the Value Tag and the System Information Area ID. Wireless device 110 can then determine system information using the obtained index value.
  • sequence i.e., PSS/SSS which provides the PCI in this third example use case
  • Wireless device 110 determines the PCI as the first index element, and determines the Value Tag and the System Information Area ID as the second index element. Wireless device 110 obtains an index value based on the PCI, the Value Tag and the System Information Area ID. Wireless device 110 can then determine system information using the obtained index value.
  • network node 115a may transmit SS blocks on multiple component carriers. Each component carrier will be associated with a frequency location.
  • the SS Block index may include a PSS/SSS sequences indicative of a PCI.
  • Wireless device 110 receives the SS block. To access the component carrier, wireless device 110 determines a first index element in the form of the PCI from the PSS/SSS sequences. Wireless device 110 determines a second index element in the form of the frequency location of the component carrier.
  • wireless device 110 Based on the determined first index value (i.e., the PCI in this fourth example use case) and the determined second index value (i.e., the frequency location of the component carrier in this fourth example use case), wireless device 110 obtains an index value. Wireless device 110 uses the obtained index value to obtain system information for the component carrier.
  • the determined first index value i.e., the PCI in this fourth example use case
  • the determined second index value i.e., the frequency location of the component carrier in this fourth example use case
  • the system information may comprise information about a target cell to which the wireless device is to be handed over.
  • wireless device 110 can get information in advance from the source cell before performing the handover.
  • wireless device 110 may determine a first index element in the form of a PCI of the target cell (for example, based on a sequence such as PSS/SSS transmitted by network node 115a).
  • wireless device 110 determines a second index element from a beam index (which may be included in a MIB of PBCH) for a beam in the target cell broadcast by network node 115a.
  • wireless device 110 Based on the first index element (i.e., the PCI in this fifth example use case) and the second index element (i.e., the beam index in this fifth example use case), wireless device 110 obtains an index value. For example, wireless device 110 may apply the first index element and the second index element to a two-dimensional table to obtain the index value indicative of system information for the beam in the target cell.
  • FIGURE 4 is a flow diagram of a method 400 in a wireless device, in accordance with certain embodiments.
  • Method 400 begins at step 404, where the wireless device receives one or more transmissions from a network node, the one or more transmissions comprising a first sequence and a broadcast channel associated with the first sequence.
  • the wireless device may be a UE.
  • the first sequence may be comprised in an SS.
  • the broadcast channel may be associated with the first sequence due to one or more of: the SS implicitly defines time and frequency resources used for demodulation of the broadcast channel; and the SS is used as a demodulation reference signal for the broadcast channel.
  • the wireless device determines a first index element based on the first sequence.
  • the first index element may comprise a plurality of bits, and determining the first index element may comprise reading the first sequence comprised in the SS.
  • the broadcast channel may be associated with the first sequence due to one or more of: the first index element is used to derive the demodulation reference signal of the broadcast channel; and the first sequence is used to derive a channel configuration of the broadcast channel.
  • the wireless device determines a second index element based on information on the broadcast channel.
  • the broadcast channel may comprise a physical broadcast channel
  • the second index element may comprise a plurality of explicit bits included in a MIB on the physical broadcast channel.
  • the method may comprise decoding the broadcast channel using the determined first index element.
  • the wireless device obtains, based on the first index element and the second index element, an index value.
  • obtaining an index value may comprise deriving the index value, wherein the derived index value is a function of the first index element and the second index element.
  • the function of the first index element and the second index element may be a concatenation of the first index element and the second index element.
  • the wireless device determines system information using the obtained index value.
  • the method may comprise accessing a network associated with the network node using the determined system information.
  • the system information may comprise system information for a cell associated with the network node.
  • the system information may comprise system information for one of a plurality of beams associated with the network node.
  • the system information may comprise information about a target cell to which the wireless device is to be handed over.
  • FIGURE 5 is a flow diagram of a method 500 in a network node, in accordance with certain embodiments.
  • Method 500 begins at step 504, where the network node defines system information for one or more aspects of wireless communication between the network node and a wireless device.
  • the wireless device may be a UE.
  • the network node transmits a first sequence to the wireless device, the first sequence enabling the wireless device to determine a first index element based on the first sequence.
  • transmitting the first sequence may comprise transmitting an SS comprising the first sequence.
  • the first index element may comprise a plurality of bits that can be determined by reading the first sequence comprised in the SS.
  • the network node transmits a broadcast channel associated with the first sequence to the wireless device, the broadcast channel enabling the wireless device to determine a second index element based on information on the broadcast channel, wherein the first index element and the second index element enable the wireless device to obtain an index value indicative of the defined system information.
  • the index value may be a function of the first index element and the second index element.
  • the function of the first index element and the second index element is a concatenation of the first index element and the second index element.
  • the system information may comprise system information for a cell associated with the network node.
  • the system information may comprise system information for one of a plurality of beams associated with the network node.
  • the system information may comprise information about a target cell to which the wireless device is to be handed over.
  • the broadcast channel may be associated with the first sequence due to one or more of: the SS implicitly defines time and frequency resources used for demodulation of the broadcast channel; and the SS is used as a demodulation reference signal for the broadcast channel.
  • the broadcast channel may be associated with the first sequence due to one or more of: the first index element is used to derive the demodulation reference signal of the broadcast channel; and the first sequence is used to derive a channel configuration of the broadcast channel.
  • the broadcast channel may comprise a physical broadcast channel
  • the second index element comprises a plurality of explicit bits included in a master information block on the physical broadcast channel
  • FIGURE 6 is a flow diagram of a method 600 in a wireless device, in accordance with certain embodiments.
  • Method 600 begins at step 604, where the wireless device reads an SS and determines a physical cell identity.
  • the wireless device may be a UE.
  • the wireless device may determine a table of system information configurations (e.g., SIB-table).
  • the wireless device may store the SIB -table.
  • the wireless device may read the SS by scanning for SS transmissions and selecting one of them (e.g., the strongest SS it receives).
  • the wireless device may determine the physical cell identity (PCI) as the index of the SS.
  • PCI physical cell identity
  • the wireless device receives a physical broadcast channel transmitted together with the SS.
  • the wireless device determines a set of cell system information configuration bits from the received physical broadcast channel.
  • the wireless device may use the knowledge of the PCI to decode the physical broadcast channel.
  • the physical broadcast channel contains a MIB, in which one element is the cell system information configuration bits.
  • the cell system information configuration bits may be located in a CELL_SI_CONFIG field.
  • the wireless device determines a system signature index to be used for selecting a system information configuration from a table of system information configurations by combining the physical cell identity with the cell system information configuration bits.
  • the system signature index may be a new index used to select a system information block configuration from a table consisting of several synch configurations.
  • system signature index may be determined as a function of the physical cell identity and the set of cell system information configuration bits.
  • the function may be a concatenation of the physical cell identity and the set of cell system information configuration bits.
  • the function may use concatenate the M most significant bits in the physical cell identity and concatenate those bits with the bits in the set of cell system information configuration bits.
  • a bit field may be created by the function and may be converted to an index used to select system information blocks from the SIB -table
  • the wireless device determines system information blocks by selecting the system information within the system signature index from the table of system information configurations.
  • the wireless device accesses the network in accordance with the information provided in the system information blocks.
  • FIGURE 7 is a block schematic of an exemplary UE, in accordance with certain embodiments.
  • UE 700 is an example wireless device 110 described above.
  • UE 700 includes an antenna 705, radio front-end circuitry 710, processing circuitry 715, and a computer-readable storage medium 730.
  • Antenna 705 may include one or more antennas or antenna arrays, and is configured to send and/or receive wireless signals, and is connected to radio front-end circuitry 710.
  • wireless device 700 may not include antenna 705, and antenna 705 may instead be separate from wireless device 700 and be connectable to wireless device 700 through an interface or port.
  • the radio front-end circuitry 710 may comprise various filters and amplifiers, is connected to antenna 705 and processing circuitry 715, and is configured to condition signals communicated between antenna 705 and processing circuitry 715.
  • UE 700 may not include radio front-end circuitry 710, and processing circuitry 715 may instead be connected to antenna 705 without radio front-end circuitry 710.
  • Processing circuitry 715 may include one or more of radio frequency (RF) transceiver circuitry, baseband processing circuitry, and application processing circuitry.
  • RF radio frequency
  • the RF transceiver circuitry, baseband processing circuitry, and application processing circuitry may be on separate chipsets.
  • part or all of the baseband processing circuitry and application processing circuitry may be combined into one chipset, and the RF transceiver circuitry may be on a separate chipset.
  • part or all of the RF transceiver circuitry and baseband processing circuitry may be on the same chipset, and the application processing circuitry may be on a separate chipset.
  • Processing circuitry 715 may include, for example, one or more central processing units (CPUs), one or more microprocessors, one or more application specific integrated circuits (ASICs), and/or one or more field programmable gate arrays (FPGAs).
  • CPUs central processing units
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • some or all of the functionality described herein as being provided by a wireless device may be provided by the processing circuitry 715 executing instructions stored on a computer-readable storage medium 730.
  • some or all of the functionality may be provided by the processing circuitry 715 without executing instructions stored on a computer-readable medium, such as in a hard- wired manner.
  • the processing circuitry can be said to be configured to perform the described functionality.
  • the benefits provided by such functionality are not limited to the processing circuitry 715 alone or to other components of UE 700, but are enjoyed by the UE as a whole, and/or by end users and the wireless network generally.
  • Antenna 705, radio front-end circuitry 710, and/or processing circuitry 715 may be configured to perform any receiving operations described herein as being performed by a UE or wireless device. Any information, data and/or signals may be received from a network node and/or another wireless device.
  • the processing circuitry 715 may be configured to perform any determining operations described herein as being performed by a wireless device. Determining as performed by processing circuitry 715 may include processing information obtained by the processing circuitry 715 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the wireless device, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.
  • Antenna 705, radio front-end circuitry 710, and/or processing circuitry 715 may be configured to perform any transmitting operations described herein as being performed by a wireless device. Any information, data and/or signals may be transmitted to a network node and/or another wireless device.
  • Computer-readable storage medium 730 is generally operable to store instructions, such as a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by a processor.
  • Examples of computer-readable storage medium 730 include computer memory (for example, RAM or ROM), mass storage media (for example, a hard disk), removable storage media (for example, a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory computer-readable and/or computer-executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 715.
  • processing circuitry 715 and computer-readable storage medium 730 may be considered to be integrated.
  • UE 700 may include additional components beyond those shown in FIGURE 7 that may be responsible for providing certain aspects of the UE's functionality, including any of the functionality described herein and/or any functionality necessary to support the solution described above.
  • UE 700 may include input interfaces, devices and circuits 720, and output interfaces, devices and circuits 725.
  • Input interfaces, devices, and circuits 720 are configured to allow input of information into UE 700, and are connected to processing circuitry 715 to allow processing circuitry 715 to process the input information.
  • input interfaces, devices, and circuits 720 may include a microphone, a proximity or other sensor, keys/buttons, a touch display, one or more cameras, a USB port, or other input elements.
  • Output interfaces, devices, and circuits 725 are configured to allow output of information from UE 700, and are connected to processing circuitry 715 to allow processing circuitry 715 to output information from UE 700.
  • output interfaces, devices, or circuits 725 may include a speaker, a display, vibrating circuitry, a USB port, a headphone interface, or other output elements.
  • UE 300 may communicate with end users and/or the wireless network, and allow them to benefit from the functionality described herein.
  • UE 700 may include power source 735.
  • Power source 735 may comprise power management circuitry.
  • Power source 735 may receive power from a power supply, which may either be comprised in, or be external to, power source 735.
  • UE 700 may comprise a power supply in the form of a battery or battery pack which is connected to, or integrated in, power source 735.
  • Other types of power sources such as photovoltaic devices, may also be used.
  • UE 700 may be connectable to an external power supply (such as an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power supply supplies power to power source 735.
  • Power source 735 may be connected to radio front-end circuitry 710, processing circuitry 715, and/or computer-readable storage medium 730 and be configured to supply UE 700, including processing circuitry 715, with power for performing the functionality described herein.
  • UE 700 may also include multiple sets of processing circuitry 715, computer-readable storage medium 730, radio circuitry 710, and/or antenna 705 for different wireless technologies integrated into wireless device 700, such as, for example, GSM, WCDMA, LTE, NR, WiFi, or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chipsets and other components within wireless device 700.
  • FIGURE 8 is a block schematic of an exemplary wireless device 110, in accordance with certain embodiments.
  • Wireless device 110 may refer to any type of wireless device communicating with a node and/or with another wireless device in a cellular or mobile communication system.
  • Examples of wireless device 110 include a mobile phone, a smart phone, a PDA (Personal Digital Assistant), a portable computer (e.g., laptop, tablet), a sensor, an actuator, a modem, a machine-type-communication (MTC) device / machine-to-machine (M2M) device, laptop embedded equipment (LEE), laptop mounted equipment (LME), USB dongles, a D2D capable device, or another device that can provide wireless communication.
  • MTC machine-type-communication
  • M2M machine-to-machine
  • LME laptop mounted equipment
  • USB dongles a D2D capable device, or another device that can provide wireless communication.
  • a wireless device 110 may also be referred to as UE, a station (STA), a device, or a terminal in some embodiments.
  • Wireless device 110 includes transceiver 810, processing circuitry 820, and memory 830.
  • transceiver 810 facilitates transmitting wireless signals to and receiving wireless signals from network node 115 (e.g., via antenna 840)
  • processing circuitry 820 executes instructions to provide some or all of the functionality described above as being provided by wireless device 110
  • memory 830 stores the instructions executed by processing circuitry 820.
  • Processing circuitry 820 may include any suitable combination of hardware and software implemented in one or more modules to execute instructions and manipulate data to perform some or all of the described functions of wireless device 110, such as the functions of wireless device 110 described above in relation to FIGURES 1-6.
  • processing circuitry 820 may include, for example, one or more computers, one or more central processing units (CPUs), one or more microprocessors, one or more applications, one or more application specific integrated circuits (ASICs), one or more field programmable gate arrays (FPGAs) and/or other logic.
  • CPUs central processing units
  • microprocessors one or more applications
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • Memory 830 is generally operable to store instructions, such as a computer program, software, an application including one or more of logic, rules, algorithms, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 820.
  • Examples of memory 830 include computer memory (for example, RAM or ROM), mass storage media (for example, a hard disk), removable storage media (for example, a CD or a DVD), and/or or any other volatile or non-volatile, non-transitory computer-readable and/or computer- executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 820.
  • wireless device 110 may include additional components beyond those shown in FIGURE 8 that may be responsible for providing certain aspects of the wireless device's functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the solution described above).
  • wireless device 110 may include input devices and circuits, output devices, and one or more synchronization units or circuits, which may be part of the processing circuitry 820.
  • Input devices include mechanisms for entry of data into wireless device 110.
  • input devices may include input mechanisms, such as a microphone, input elements, a display, etc.
  • Output devices may include mechanisms for outputting data in audio, video and/or hard copy format.
  • output devices may include a speaker, a display, etc.
  • FIGURE 9 is a block schematic of an exemplary network node 115, in accordance with certain embodiments.
  • Network node 115 may be any type of radio network node or any network node that communicates with a UE and/or with another network node.
  • Examples of network node 115 include an eNodeB, a gNB, a node B, a base station, a wireless access point (e.g., a Wi-Fi access point), a low power node, a base transceiver station (BTS), relay, donor node controlling relay, transmission points, transmission nodes, remote RF unit (RRU), remote radio head (RRH), multi- standard radio (MSR) radio node such as MSR BS, nodes in distributed antenna system (DAS), O&M, OSS, SON, positioning node (e.g., E- SMLC), MDT, or any other suitable network node.
  • MSR multi- standard radio
  • Network nodes 115 may be deployed throughout network 100 as a homogenous deployment, heterogeneous deployment, or mixed deployment.
  • a homogeneous deployment may generally describe a deployment made up of the same (or similar) type of network nodes 115 and/or similar coverage and cell sizes and inter-site distances.
  • a heterogeneous deployment may generally describe deployments using a variety of types of network nodes 115 having different cell sizes, transmit powers, capacities, and inter-site distances.
  • a heterogeneous deployment may include a plurality of low-power nodes placed throughout a macro-cell layout.
  • Mixed deployments may include a mix of homogenous portions and heterogeneous portions.
  • Network node 115 may include one or more of transceiver 910, processing circuitry
  • transceiver 910 facilitates transmitting wireless signals to and receiving wireless signals from wireless device 110 (e.g., via antenna 950)
  • processing circuitry 920 executes instructions to provide some or all of the functionality described above as being provided by a network node 115
  • memory 930 stores the instructions executed by processing circuitry 920
  • network interface 940 communicates signals to backend network components, such as a gateway, switch, router, Internet, Public Switched Telephone Network (PSTN), core network nodes or radio network controllers 130, etc.
  • PSTN Public Switched Telephone Network
  • Processing circuitry 920 may include any suitable combination of hardware and software implemented in one or more modules to execute instructions and manipulate data to perform some or all of the described functions of network node 115, such as those described above in relation to FIGURES 1-6.
  • processing circuitry 920 may include, for example, one or more computers, one or more CPUs, one or more microprocessors, one or more applications, one or more ASICs, one or more FPGAs and/or other logic.
  • Memory 930 is generally operable to store instructions, such as a computer program, software, an application including one or more of logic, rules, algorithms, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 920.
  • Examples of memory 930 include computer memory (for example, RAM or ROM), mass storage media (for example, a hard disk), removable storage media (for example, a CD or a DVD), and/or or any other volatile or non-volatile, non-transitory computer-readable and/or computer- executable memory devices that store information.
  • network interface 940 is communicatively coupled to processing circuitry 920 and may refer to any suitable device operable to receive input for network node 115, send output from network node 115, perform suitable processing of the input or output or both, communicate to other devices, or any combination of the preceding.
  • Network interface 940 may include appropriate hardware (e.g., port, modem, network interface card, etc.) and software, including protocol conversion and data processing capabilities, to communicate through a network.
  • network node 115 may include additional components beyond those shown in FIGURE 9 that may be responsible for providing certain aspects of the radio network node's functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the solutions described above).
  • the various different types of network nodes may include components having the same physical hardware but configured (e.g., via programming) to support different radio access technologies, or may represent partly or entirely different physical components.
  • FIGURE 10 is a block schematic of an exemplary radio network controller or core network node 130, in accordance with certain embodiments.
  • network nodes can include a mobile switching center (MSC), a serving GPRS support node (SGSN), a mobility management entity (MME), a radio network controller (RNC), a base station controller (BSC), and so on.
  • the radio network controller or core network node 130 includes processing circuitry 1020, memory 1030, and network interface 1040.
  • processing circuitry 1020 executes instructions to provide some or all of the functionality described above as being provided by the network node
  • memory 1030 stores the instructions executed by processing circuitry 1020
  • network interface 1040 communicates signals to any suitable node, such as a gateway, switch, router, Internet, Public Switched Telephone Network (PSTN), network nodes 115, radio network controllers or core network nodes 130, etc.
  • PSTN Public Switched Telephone Network
  • Processing circuitry 1020 may include any suitable combination of hardware and software implemented in one or more modules to execute instructions and manipulate data to perform some or all of the described functions of the radio network controller or core network node 130.
  • processing circuitry 1020 may include, for example, one or more computers, one or more CPUs, one or more microprocessors, one or more applications, one or more ASICs, one or more FPGAs and/or other logic.
  • Memory 1030 is generally operable to store instructions, such as a computer program, software, an application including one or more of logic, rules, algorithms, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 1020.
  • Examples of memory 1030 include computer memory (for example, RAM or ROM), mass storage media (for example, a hard disk), removable storage media (for example, a CD or a DVD), and/or or any other volatile or non-volatile, non-transitory computer-readable and/or computer-executable memory devices that store information.
  • network interface 1040 is communicatively coupled to processing circuitry 1020 and may refer to any suitable device operable to receive input for the network node, send output from the network node, perform suitable processing of the input or output or both, communicate to other devices, or any combination of the preceding.
  • Network interface 1040 may include appropriate hardware (e.g., port, modem, network interface card, etc.) and software, including protocol conversion and data processing capabilities, to communicate through a network.
  • network node may include additional components beyond those shown in FIGURE 10 that may be responsible for providing certain aspects of the network node's functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the solution described above).
  • FIGURE 11 is a schematic block diagram of an exemplary wireless device, in accordance with certain embodiments.
  • Wireless device 110 may include one or more modules.
  • wireless device 110 may include a determining module 1110, a communication module 1120, a receiving module 1130, an input module 1140, a display module 1150, and any other suitable modules.
  • one or more of determining module 1110, communication module 1120, receiving module 1130, input module 1140, display module 1150, or any other suitable module may be implemented using one or more processors, such as processing circuitry 820 described above in relation to FIGURE 8.
  • the functions of two or more of the various modules may be combined into a single module.
  • Wireless device 110 may perform the methods for enhanced index based system information distribution described above in relation to FIGURES 1-6.
  • Determining module 1110 may perform the processing functions of wireless device 110. For example, determining module 1110 may determine a first index element based on the first sequence. As another example, determining module 1110 may determine a second index element based on information on the broadcast channel. As still another example, determining module 1110 may obtain, based on the first index element and the second index element, an index value. As yet another example, determining module 1110 may determine system information using the obtained index value. As another example, determining module 1110 may access a network associated with the network node using the determined system information. As another example, determining module 1110 may derive the index value, wherein the derived index value is a function of the first index element and the second index element. As another example, determining module 1110 may determine the first index element by reading the first sequence comprised in an SS. As another example, determining module 1110 may decode the broadcast channel using the determined first index element.
  • determining module 1110 may read an SS and determine a physical cell identity. Determining module 1110 may determine a set of cell system information configuration bits from the received physical broadcast channel. Determining module 1110 may determine a system signature index to be used for selecting a system information configuration from a table of system information configurations by combining the physical cell identity with the cell system information configuration bits. Determining module 1110 may determine system information blocks by selecting the system information with the system signature index from the table of system information configurations. Determining module 1110 may access the network in accordance with the information provided in the system information blocks.
  • Determining module 1110 may include or be included in one or more processors, such as processing circuitry 820 described above in relation to FIGURE 8. Determining module 1110 may include analog and/or digital circuitry configured to perform any of the functions of determining module 1110 and/or processing circuitry 820 described above. The functions of determining module 1110 described above may, in certain embodiments, be performed in one or more distinct modules.
  • Communication module 1120 may perform the transmission functions of wireless device 110. For example, communication module 1120 may access a network associated with the network node using the determined system information. As another example, communication module 1120 may access the network in accordance with the information provided in the system information blocks. Communication module 1120 may include a transmitter and/or a transceiver, such as transceiver 810 described above in relation to FIGURE 8. Communication module 1120 may include circuitry configured to wirelessly transmit messages and/or signals. In particular embodiments, communication module 1120 may receive messages and/or signals for transmission from determining module 1110. In certain embodiments, the functions of communication module 1120 described above may be performed in one or more distinct modules.
  • Receiving module 1130 may perform the receiving functions of wireless device 110. For example, receiving module 1130 may receive one or more transmissions from a network node, the one or more transmissions comprising a first sequence and a broadcast channel associated with the first sequence. As another example, receiving module 1130 may receive a physical broadcast channel transmitted together with the SS. Receiving module 1130 may include a receiver and/or a transceiver. Receiving module 1130 may include a receiver and/or a transceiver, such as transceiver 810 described above in relation to FIGURE 8. Receiving module 1130 may include circuitry configured to wirelessly receive messages and/or signals. In particular embodiments, receiving module 1130 may communicate received messages and/or signals to determining module 1110. The functions of receiving module 1130 described above may, in certain embodiments, be performed in one or more distinct modules.
  • Input module 1140 may receive user input intended for wireless device 110.
  • the input module may receive key presses, button presses, touches, swipes, audio signals, video signals, and/or any other appropriate signals.
  • the input module may include one or more keys, buttons, levers, switches, touchscreens, microphones, and/or cameras.
  • the input module may communicate received signals to determining module 1110.
  • the functions of input module 1140 described above may, in certain embodiments, be performed in one or more distinct modules.
  • Display module 1150 may present signals on a display of wireless device 110.
  • Display module 1150 may include the display and/or any appropriate circuitry and hardware configured to present signals on the display.
  • Display module 1150 may receive signals to present on the display from determining module 1110.
  • the functions of display module 1150 described above may, in certain embodiments, be performed in one or more distinct modules.
  • Determining module 1110, communication module 1120, receiving module 1130, input module 1140, and display module 1150 may include any suitable configuration of hardware and/or software.
  • Wireless device 110 may include additional modules beyond those shown in FIGURE 11 that may be responsible for providing any suitable functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the various solutions described herein).
  • FIGURE 12 is a schematic block diagram of an exemplary network node 115, in accordance with certain embodiments.
  • Network node 115 may include one or more modules.
  • network node 115 may include determining module 1210, communication module 1220, receiving module 1230, and any other suitable modules.
  • one or more of determining module 1210, communication module 1220, receiving module 1230, or any other suitable module may be implemented using one or more processors, such as processing circuitry 920 described above in relation to FIGURE 9.
  • the functions of two or more of the various modules may be combined into a single module.
  • Network node 115 may perform the methods for enhanced index based system information distribution described above with respect to FIGURES 1-6.
  • Determining module 1210 may perform the processing functions of network node 115.
  • determining module 1210 may define system information for one or more aspects of wireless communication between the network node and a wireless device.
  • Determining module 1210 may include or be included in one or more processors, such as processing circuitry 920 described above in relation to FIGURE 9. Determining module 1210 may include analog and/or digital circuitry configured to perform any of the functions of determining module 1210 and/or processing circuitry 920 described above. The functions of determining module 1210 may, in certain embodiments, be performed in one or more distinct modules.
  • Communication module 1220 may perform the transmission functions of network node 115. As one example, communication module 1220 may transmit a first sequence to the wireless device, the first sequence enabling the wireless device to determine a first index element based on the first sequence. As another example, communication module 1220 may transmit a broadcast channel associated with the first sequence to the wireless device, the broadcast channel enabling the wireless device to determine a second index element based on information on the broadcast channel, wherein the first index element and the second index element enable the wireless device to obtain an index value indicative of the defined system information. As still another example, communication module 1220 may transmit an SS comprising the first sequence. Communication module 1220 may transmit messages to one or more of wireless devices 110.
  • Communication module 1220 may include a transmitter and/or a transceiver, such as transceiver 910 described above in relation to FIGURE 9.
  • Communication module 1220 may include circuitry configured to wirelessly transmit messages and/or signals.
  • communication module 1220 may receive messages and/or signals for transmission from determining module 1210 or any other module.
  • the functions of communication module 1220 may, in certain embodiments, be performed in one or more distinct modules.
  • Receiving module 1230 may perform the receiving functions of network node 115. Receiving module 1230 may receive any suitable information from a wireless device. Receiving module 1230 may include a receiver and/or a transceiver, such as transceiver 910 described above in relation to FIGURE 9. Receiving module 1230 may include circuitry configured to wirelessly receive messages and/or signals. In particular embodiments, receiving module 1230 may communicate received messages and/or signals to determining module 1210 or any other suitable module. The functions of receiving module 1230 may, in certain embodiments, be performed in one or more distinct modules.
  • Determining module 1210, communication module 1220, and receiving module 1230 may include any suitable configuration of hardware and/or software.
  • Network node 115 may include additional modules beyond those shown in FIGURE 12 that may be responsible for providing any suitable functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the various solutions described herein).

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé dans un dispositif sans fil (110) consistant : (404) à recevoir une ou plusieurs transmissions (125a, 125b) à partir d'un nœud de réseau (115), lesdites transmissions comportant une première séquence et un canal de diffusion associé à la première séquence. Le procédé consiste également : (408) à déterminer un premier élément d'indice sur la base de la première séquence, et (412) à déterminer un second élément d'indice sur la base d'informations sur le canal de diffusion. Le procédé consiste en outre : (416) à obtenir, sur la base du premier élément d'indice et du second élément d'indice, une valeur d'indice. Le procédé consiste enfin : (420) à déterminer des informations de système à l'aide de la valeur d'indice obtenue.
PCT/IB2017/055938 2016-09-30 2017-09-27 Distribution d'informations de système basée sur un indice amélioré Ceased WO2018060903A1 (fr)

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