WO2015110164A1 - Procédé, appareil et programme d'ordinateur - Google Patents

Procédé, appareil et programme d'ordinateur Download PDF

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Publication number
WO2015110164A1
WO2015110164A1 PCT/EP2014/051355 EP2014051355W WO2015110164A1 WO 2015110164 A1 WO2015110164 A1 WO 2015110164A1 EP 2014051355 W EP2014051355 W EP 2014051355W WO 2015110164 A1 WO2015110164 A1 WO 2015110164A1
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WIPO (PCT)
Prior art keywords
channel
system information
sent
received
same
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PCT/EP2014/051355
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English (en)
Inventor
Alexander Sayenko
Bindhya Vashini Tiwari
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Nokia Solutions And Networks Oy
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Priority to PCT/EP2014/051355 priority Critical patent/WO2015110164A1/fr
Publication of WO2015110164A1 publication Critical patent/WO2015110164A1/fr

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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
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the invention relates to a method, apparatus and computer program, and in particular but not exclusively to a method, apparatus and computer program for scheduling communications.
  • a communication system can be seen as a facility that enables communication sessions between two or more entities such as fixed or mobile communication devices, base stations, servers and/or other communication nodes.
  • a communication system and compatible communicating entities typically operate in accordance with a given standard or specification which sets out what the various entities associated with the system are permitted to do and how that should be achieved.
  • the standards, specifications and related protocols can define the manner how communication devices can access the communication system and how various aspects of communication shall be implemented between communicating devices.
  • a communication can be carried on wired or wireless carriers. In a wireless communication system at least a part of the communication between at least two stations occurs over a wireless link.
  • wireless systems include public land mobile networks (PLMN) such as cellular networks, satellite based communication systems and different wireless local networks, for example wireless local area networks (WLAN).
  • PLMN public land mobile networks
  • WLAN wireless local area networks
  • a wireless system can be divided into cells, and hence these are often referred to as cellular systems.
  • a cell is provided by a base station. Cells can have different shapes and sizes. A cell can also be divided into sectors. Regardless of the shape and size of the cell providing access for a user equipment, and whether the access is provided via a sector of a cell or a cell, such area can be called radio service area or access area. Neighbouring radio service areas typically overlap, and thus a communication in an area can listen to more than one base station.
  • a user can access the communication system by means of an appropriate communication device.
  • a communication device of a user is often referred to as user equipment (UE) or terminal.
  • UE user equipment
  • a communication device is provided with an appropriate signal receiving and transmitting arrangement for enabling communications with other parties.
  • a com- munication device is used for enabling receiving and transmission of communications such as speech and data.
  • a communication device provides a transceiver station that can communicate with another communication device such as e.g. a base station of an access network and/or another user equipment.
  • the communication device may access a carrier provided by a station, for example a base station, and transmit and/or receive communications on the carrier.
  • Examples of communication systems attempting to satisfy the increased demands for capacity are architectures that are being standardized by the 3rd Generation Partnership Project (3GPP), such as the long-term evolution (LTE), or the Universal Mobile Telecommunications System (UMTS) radio-access technologies.
  • 3GPP 3rd Generation Partnership Project
  • LTE long-term evolution
  • UMTS Universal Mobile Telecommunications System
  • the LTE aims to achieve various improvements, for example reduced latency, higher user data rates, improved system capacity and coverage, reduced cost for the operator and so on.
  • LTE-Advanced A further development of the LTE is often referred to as LTE-Advanced.
  • the various development stages of the 3GPP LTE specifica- tions are referred to as releases.
  • the network nodes can be wide area network nodes such as a macro eNodeB (eNB) which may, for example, provide coverage for an entire cell.
  • network nodes can be small area network nodes such as Home eNBs (HeNB) (femto cells) or pico eNodeBs (pico-eNB).
  • HeNBs may be configured to support local offload and may support any UE or UEs belonging to a closed subscriber group (CSG) or an open subscriber group (OSG).
  • Pico eNBs can, for example, be configured to extend the range of a cell.
  • a combination of wide area network nodes and small area network nodes can be deployed using the same frequency carriers (e.g. co-channel deploy- ment).
  • multiple base stations Node-Bs
  • RNCs radio network controllers
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • LTE Long Term Evolution
  • a method comprising: receiving system information on a first channel; receiving system information on a second channel; wherein said system information is received within a time period, and at least some of said system information received on said second channel is the same as system information received on said first channel; and wherein the method comprises receiving the system information on the second channel in a time-controlled manner with respect to the receiving of system informa- tion on the first channel.
  • said first channel and said second channel are broadcast channels.
  • Preferably said method comprises establishing said first and second channels.
  • system information is comprised in system information blocks.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel in a time- shifted manner with respect to the first channel.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel before it is received on the first channel.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel at the same time as it is received on the first channel.
  • the method comprises receiving information indicating that at least some of the information received on the first and second channels will be the same.
  • said information indicating that at least some of the information received on the first and second channels will be the same is comprised in said system information.
  • Preferably system information is received on said first and second channels in dependence on a priority of that system information.
  • said system information received on the second channel which is the same as the system information received on the first channel is of a lower priority than system information that is received on said first channel only.
  • said system information received on said second channel that is the same as system information received on said first channel comprises neighbour-cell information.
  • said time period comprises one of: 0 ms; 80ms; 160ms; 240ms; 320ms; 400ms; 480ms; 560ms; 640ms; 720ms; 800ms; 880ms; 960ms; 1040ms; 1 120ms; 1200ms; 1280ms.
  • Preferably said method comprises decoding said information.
  • a computer program comprising computer executable instructions which when run on one or more processors performs the method of the first aspect.
  • a method comprising: sending system information on a first channel; sending system information on a second channel; wherein said system information is sent within a time period, and at least some of said system information sent on said second channel is the same as system information sent on said first channel; and wherein the method comprises sending the system information on the second channel in a time-controlled manner with respect to the sending of system information on the first channel.
  • said first channel and said second channel are broadcast channels.
  • said method comprises establishing said first and second channels.
  • system information is comprised in system information blocks.
  • the system information sent on the second channel which is the same as the sys- tem information sent on the first channel is sent on the second channel in a time-shifted manner with respect to the first channel.
  • the system information sent on the second channel which is the same as the system information sent on the first channel is sent on the second channel before it is sent on the first channel.
  • the system information sent on the second channel which is the same as the system information sent on the first channel is sent on the second channel at the same time as it is sent on the first channel.
  • the method comprises sending information indicating that at least some of the information sent on the first and second channels will be the same.
  • said information indicating that at least some of the information received on the first and second channels will be the same is comprised in said system information.
  • Preferably system information is sent on said first and second channels in dependence on a priority of that system information.
  • system information sent on the second channel which is the same as the system information sent on the first channel is of a lower priority than system information that is sent on said first channel only.
  • said system information sent on said second channel that is the same as system information sent on said first channel comprises neighbour-cell information.
  • said time period comprises one of: 0ms; 80ms; 160ms; 240ms; 320ms; 400ms; 480ms; 560ms; 640ms; 720ms; 800ms; 880ms; 960ms; 1040ms; 1 120ms; 1200ms; 1280ms.
  • said method comprises encoding said information.
  • a computer program comprising computer executable instructions which when run on one or more processors performs the method of the third aspect.
  • an apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: receive system information on a first channel; receive system information on a sec- ond channel; receive said system information within a time period, such that at least some of said system information received on said second channel is the same as system information received on said first channel; and receive the system information on the second channel in a time-controlled manner with respect to the receiving of system information on the first channel
  • said first channel and said second channel are broadcast channels.
  • said apparatus is configured to establish said first and second channels.
  • said system information is comprised in system information blocks.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel in a time- shifted manner with respect to the first channel.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel before it is received on the first channel.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel at the same time as it is received on the first channel.
  • the apparatus is configured to receive information indicating that at least some of the information received on the first and second channels will be the same.
  • said information indicating that at least some of the information received on the first and second channels will be the same is comprised in said system information.
  • Preferably system information is received on said first and second channels in dependence on a priority of that system information.
  • system information received on the second channel which is the same as the system information received on the first channel is of a lower priority than system information that is received on said first channel only.
  • system information received on said second channel that is the same as system information received on said first channel comprises neighbour-cell information.
  • said time period comprises one of: 0ms; 80ms; 160ms; 240ms; 320ms; 400ms; 480ms; 560ms; 640ms; 720ms; 800ms; 880ms; 960ms; 1040ms; 1 120ms; 1200ms; 1280ms.
  • an apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: send system information on a first channel; send system information on a second channel; send said system information within a time period, such that at least some of said system information sent on said second channel is the same as system information sent on said first channel; and send the system information on the second channel in a time-controlled manner with respect to the sending of system information on the first channel
  • said first channel and said second channel are broadcast channels.
  • said apparatus is configured to establish said first and second channels.
  • said system information is comprised in system information blocks.
  • the system information sent on the second channel which is the same as the system information sent on the first channel is sent on the second channel in a time-shifted manner with respect to the first channel.
  • the system information sent on the second channel which is the same as the system information sent on the first channel is sent on the second channel before it is sent on the first channel.
  • the system information sent on the second channel which is the same as the sys- tern information sent on the first channel is sent on the second channel at the same time as it is sent on the first channel.
  • the apparatus is configured to send information indicating that at least some of the information sent on the first and second channels will be the same.
  • said information indicating that at least some of the information sent on the first and second channels will be the same is comprised in said system information.
  • Preferably system information is sent on said first and second channels in dependence on a priority of that system information.
  • system information sent on the second channel which is the same as the system information sent on the first channel is of a lower priority than system information that is sent on said first channel only.
  • system information sent on said second channel that is the same as system information sent on said first channel comprises neighbour-cell information.
  • said time period comprises one of: 0ms; 80ms; 160ms; 240ms; 320ms; 400ms; 480ms; 560ms; 640ms; 720ms; 800ms; 880ms; 960ms; 1040ms; 1 120ms; 1200ms; 1280ms.
  • said apparatus is configured to encode said information.
  • an apparatus comprising: means for receiving system information on a first channel; means for receiving system information on a second channel; and means for receiving said system information within a time period, such that at least some of said system information received on said second channel is the same as system information received on said first channel; and means for receiving the system information on the second channel in a time-controlled manner with respect to the receiving of system information on the first channel
  • said first channel and said second channel are broadcast channels.
  • said apparatus is comprises means for establishing said first and second chan- nels.
  • said system information is comprised in system information blocks.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel in a time- shifted manner with respect to the first channel.
  • the system information received on the second channel which is the same as the system information received on the first channel is received on the second channel before it is received on the first channel.
  • the apparatus comprises means for receiving information indicating that at least some of the information received on the first and second channels will be the same.
  • said information indicating that at least some of the information received on the first and second channels will be the same is comprised in said system information.
  • the system information is received on said first and second channels in dependence on a priority of that system information.
  • system information received on the second channel which is the same as the system information received on the first channel is of a lower priority than system information that is received on said first channel only.
  • said system information received on said second channel that is the same as system information received on said first channel comprises neighbour-cell information.
  • said time period comprises one of: 0ms; 80ms; 160ms; 240ms; 320ms; 400ms; 480ms; 560ms; 640ms; 720ms; 800ms; 880ms; 960ms; 1040ms; 1 120ms; 1200ms; 1280ms.
  • said apparatus comprises means for decoding said information.
  • an apparatus comprising means for sending system information on a first channel; means for sending system information on a second channel; means for sending said system information within a time period, such that at least some of said system information sent on said second channel is the same as system information sent on said first channel; and means for sending the system information on the second channel in a time-controlled manner with respect to the sending of system information on the first channel
  • said first channel and said second channel are broadcast channels.
  • said apparatus comprises means for establishing said first and second channels.
  • system information is comprised in system information blocks.
  • system information sent on the second channel which is the same as the system information sent on the first channel is sent on the second channel in a time-shifted manner with respect to the first channel.
  • the system information sent on the second channel which is the same as the sys- tern information sent on the first channel is sent on the second channel before it is sent on the first channel.
  • the system information sent on the second channel which is the same as the system information sent on the first channel is sent on the second channel at the same time as it is sent on the first channel.
  • the apparatus comprises means for sending information indicating that at least some of the information sent on the first and second channels will be the same.
  • information indicating that at least some of the information sent on the first and second channels will be the same is comprised in said system information.
  • system information is sent on said first and second channels in dependence on a priority of that system information.
  • said system information sent on the second channel which is the same as the system information sent on the first channel is of a lower priority than system information that is sent on said first channel only.
  • said system information sent on said second channel that is the same as system information sent on said first channel comprises neighbour-cell information.
  • said time period comprises one of: 0ms; 80ms; 160ms; 240ms; 320ms; 400ms; 480ms; 560ms; 640ms; 720ms; 800ms; 880ms; 960ms; 1040ms; 1 120ms; 1200ms; 1280ms.
  • said apparatus comprises means for encoding said information.
  • Figure 1 shows a schematic diagram of a network according to some embodiments
  • Figure 2 shows a schematic diagram of a communication device according to some embodiments
  • Figure 3 shows a schematic diagram of a control apparatus according to some embodiments
  • Figure 4 shows an example table of various SIB messages
  • Figure 5 shows SIB scheduling according to one operation
  • Figure 6 shows SIB scheduling according to an embodiment
  • Figure 7 shows SIB scheduling according to a further embodiment.
  • a communication device or user equipment 101 , 102, 103, 104 is typically provided wireless access via at least one base station or similar wireless transmitter and/or receiver node of an access system.
  • FIG 1 three neighbouring and overlapping access systems or radio service areas 100, 1 10 and 120 are shown being provided by base stations 105, 106, and 108.
  • An access system can be provided by a cell of a cellular system or another system enabling a communication device to access a communication system.
  • a base station site 105, 106, 108 can provide one or more cells.
  • a base station can also provide a plurality of sectors, for example three radio sectors, each sector providing a cell or a subarea of a cell. All sectors within a cell can be served by the same base station.
  • a radio link within a sector can be identified by a single logical identification belonging to that sector. Thus a base station can provide one or more radio service areas.
  • Each communication device 101 , 102, 103, 104, and base station 105, 106, and 108 may have one or more radio channels open at the same time and may send signals to and/or receive signals from more than one source.
  • Base stations 105, 106, 108 are typically controlled by at least one appropriate controller apparatus 109, 107 so as to enable operation thereof and management of communication devices 101 , 102, 103, 104 in communication with the base stations 105, 106, 108.
  • the control apparatus 107, 109 can be interconnected with other control entities.
  • the control apparatus 109 can typically be provided with memory capacity 301 and at least one data processor 302.
  • the control apparatus 109 and functions may be distributed between a plurality of control units.
  • each base station 105, 106 and 108 can comprise a control apparatus 109, 107.
  • the cell borders or edges are schematically shown for illustration purposes only in Figure 1. It shall be understood that the sizes and shapes of the cells or other radio service areas may vary considerably from the similarly sized omni-directional shapes of Figure 1 .
  • Figure 1 depicts two wide area base stations 105, 106, which can be macro- eNBs 105, 106 in an LTE system.
  • the macro-eNBs 105, 106 transmit and receive data over the entire coverage of the cells 100 and 1 10 respectively.
  • Figure 1 also shows a smaller area base station or access point which in some embodiments can be a pico, a femto or Home eNB 108.
  • the coverage of the smaller area base station 108 is generally smaller than the coverage of the wide area base stations 105, 106.
  • the coverage provided by the smaller area node 108 overlaps with the coverage provided by the macro-eNBs 105, 106.
  • Pico eNBs can be used to extend coverage of the macro-eNBs 105, 106 outside the original cell coverage 100, 1 10 of the macro-eNBs 105, 106.
  • the pico eNB can also be used to provide cell coverage in "gaps" or "shadows" where there is no coverage within the existing cells 100, 1 10 and/or may serve "hot spots".
  • the smaller area node can be a femto or Home eNB which can provide coverage for a relatively small area such as the home.
  • Some environments may have both pico and femto cells.
  • the radio service areas can overlap.
  • signals transmitted in an area can interfere with communications in another area (macro to macro, pico/femto to either one or both of the macro cells, and/or pico/femto to pico/femto).
  • the communication devices 101 , 102, 103, 104 can access the communication system based on various access techniques, such as code division multiple access (CDMA), or wideband CDMA (WCDMA).
  • CDMA code division multiple access
  • WCDMA wideband CDMA
  • Other examples include time division multiple access (TDMA), frequency division multiple access (FDMA) and various schemes thereof such as the inter- leaved frequency division multiple access (IFDMA), single carrier frequency division multiple access (SC-FDMA) and orthogonal frequency division multiple access (OFDMA), space division multiple access (SDMA) and so on.
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • IFDMA inter- leaved frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SDMA space division multiple access
  • LTE long-term evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP 3rd Generation Partnership Project
  • LTE-Advanced Non-limiting examples of appropriate access nodes are a base station of a cellular system, for example what is known as NodeB (NB) in the vocabulary of the 3GPP specifications.
  • NB NodeB
  • the LTE employs a mobile architecture known as the Evolved Universal Terrestrial Radio Access Network (E- UTRAN).
  • E- UTRAN Evolved Universal Terrestrial Radio Access Network
  • Base stations of such systems are known as evolved Node Bs (eNBs) and may provide E-UTRAN features such as user plane Radio Link Control/Medium Access Control/Physical layer protocol (RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol terminations towards the user devices.
  • eNBs evolved Node Bs
  • RLC/MAC/PHY Radio Link Control/Medium Access Control/Physical layer protocol
  • RRC Radio Resource Control
  • Other examples of radio access sys- terns include those provided by base stations of systems that are based on technologies such as wireless local area network (WLAN) and/or WiMax (Worldwide Interoperability for Microwave Access).
  • WLAN wireless local area network
  • WiMax Worldwide Interoperability for Microwave Access
  • the base stations 105, 106, 108 of the access systems can be connected to a wider communications network 1 13.
  • a controller apparatus 107, 109 may be provided for coordinating the operation of the access systems.
  • a gateway function 1 12 may also be pro- vided to connect to another network via the network 1 13.
  • the smaller area base station 108 can also be connected to the other network by a separate gateway function 1 1 1 .
  • the base stations 105, 106, 108 can be connected to each other by a communication link for sending and receiving data.
  • the communication link can be any suitable means for sending and re- ceiving data between the base stations 105, 106 and 108 and in some embodiments the communication link is an X2 link.
  • the other network may be any appropriate network.
  • a wider communication system may thus be provided by one or more interconnect networks and the elements thereof, and one or more gateways may be provided for interconnecting various networks.
  • embodiments may also be applicable to a UMTS network.
  • user equipment 101 ', 102', 103' and 104' may be in communication with NodeBs 105' and 106'.
  • the Node Bs 105' and 106' may themselves be controlled by an RNC 1 12'
  • FIG. 2 shows a schematic, partially sectioned view of a communication device 101 that a user can use for communication.
  • a communication device is often referred to as user equipment (UE) or terminal.
  • An appropriate communication device may be provided by any device capable of sending and receiving radio signals.
  • the communication device may be mobile or may be generally stationary. Non-limiting examples include a mobile station (MS) such as a mobile phone or what is known as a 'smart phone', a portable com- puter provided with a wireless interface card or other wireless interface facility, personal data assistant (PDA) provided with wireless communication capabilities, a computer or any combinations of these or the like.
  • MS mobile station
  • PDA personal data assistant
  • a communication device may provide, for example, communication of data for carrying communications such as voice, electronic mail (email), text message, multimedia and so on. Users may thus be offered and provided numerous services via their communication devices. Non-limiting examples of these services include two-way or multi-way calls, data communication or multimedia services or simply an access to a data communications network system, such as the Internet. User may also be provided broadcast or multicast data. Non-limiting examples of the content include downloads, television and radio programs, videos, advertisements, various alerts and other information.
  • the device 101 may receive signals over an air interface 207 via appropriate apparatus for receiving and may transmit signals via appropriate apparatus for transmitting radio signals.
  • transceiver apparatus is designated schematically by block 206.
  • the transceiver apparatus 206 may be provided for example by means of a radio part and associated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the communication device.
  • the communication device is also typically provided with at least one data processing entity 201 , at least one memory 202 and other possible components 203 for use in software and hardware aided execution of tasks it is designed to perform, including control of access to and communications with access systems and other communication devices.
  • the data processing, storage and other relevant control apparatus can be provided on an appropriate circuit board and/or in chipsets. This feature is denoted by reference 204.
  • the user may control the operation of the communication device by means of a suitable user interface such as key pad 205, voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 208, a speaker and a microphone can be also provided.
  • a communication device may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands- free equipment, thereto.
  • Figure 3 shows an example of a control apparatus 109 for a communication system, for example to be coupled to and/or for controlling a station of an access system.
  • the base stations 105, 106, and 108 comprise a control apparatus 109.
  • each base station will have a control apparatus.
  • the control apparatus can be another network element.
  • the control apparatus 109 can be arranged to provide control of communications by communication devices that are in the service area of the system.
  • the control apparatus 109 can be configured to provide control functions in association with generation and communication of transmission patterns and other related information by means of the data processing facility in accordance with certain embodiments described below.
  • the control apparatus 109 comprises at least one memory 301 , at least one data processing unit 302, 303 and an input/output interface 304. Via the interface the control apparatus can be coupled to a receiver and a trans- mitter of the base station.
  • the control apparatus 109 can be configured to execute an appropriate software code to provide the control functions.
  • a UE such as device 101 , may be configured to receive system information blocks (SIBs).
  • SIBs comprise system information that is transmitted from UTRAN (or E-UTRAN) to UE. The system information is required by the UE in order for it to function correctly.
  • SIB may be sent from the UTRAN (e.g.
  • BCCH broadcast control channel - logical channel
  • BCH broadcast channel - transport channel
  • PCCPCH Primary Common Control Physical Channel
  • SCCPCH Secondary Common Control Physical Channel
  • a master information block may be used to specify which system information blocks are in use in a cell, and how they are scheduled.
  • a system information block may also contain schedul- ing information for another system information block in a lower hierarchy.
  • the system information blocks are sent from the network 1 13 or RNC 1 12' to the UE 101 , for example via a base station 105.
  • a typical design of any wireless access system may assume a fixed rate capacity of the channel for system information, so if a channel capacity reaches its limit and new features are deployed, the network may have to either sacrifice data, for instance neighbour-cell lists, or increase the system information repetition cycle, which may impact negatively on other features, such as cell reselection, voice call establishment, state transition etc.
  • UMTS/HSPA There are features in the UMTS/HSPA system that depend on the system information, and in particular, that depend on how fast a UE can receive all the SIBs. All the system information is grouped logically into those blocks based on the functional or logical relevance, e.g., neighbour cell lists, cell access barring, control information for enhanced DL and UL in CELL_FACH, etc. Except for a few cases, a UE typically has to receive and correctly decode all the blocks before it can get an access to the cell and/or perform other actions such as call establishment.
  • Figure 4 shows, by way of example, how often various SIBs may typically be sent over a 1.28 second cycle.
  • the SIB number is shown in column 402, the number of segments re- lated to that SIB is shown at column 404, and the repetition rate for the SIB in question is shown at column 406.
  • some SIBs are relatively small and are repeated several times, which is governed either by the specification requirements or performance requirements.
  • SIB1 and SIB2 require only one segment and are repeated every 640ms.
  • SIB1 may contain NAS information and timers/counters needed for the idle and connected modes.
  • SIB2 may contain information for so-called URA areas need for the URA_PCH state.
  • SIB and SIB7 also require only one segment and are sent every 80ms.
  • SIBs are larger, such as SIB5 (which requires 5 segments) and SIB1 1/SIB1 1 bis (which may require somewhere between two and twenty seg- ments).
  • SIB1 1/SIB1 1 bis for instance carries information about neighbour cells and is usually the largest SIB. This also explains why this SIB cannot be repeated several times over the 1.28 second cycle.
  • SIBs can be or may have to be segmented because system information is sent in the form of a transport block of a fixed size. Therefore if a SIB does not fit in one transport block it may be split in to several parts. A UE may only be able to comprehend the content of a SIB once all the segments have been received correctly.
  • the values given in the table of Figure 4 are by way of example only.
  • the SIBs may be segmented in a different fashion (i.e. more or fewer segments), and the repetition period may be different.
  • the overall cycle time may also differ from 1 .28 seconds.
  • some SIBs can be and are repeated one or more times within a cycle making it possible for a UE to gain access to the network earlier than the 1 .28 second total cycle time (if a UE can for instance skip neighbour-cell list reading).
  • having a neighbour cell list may improve mobility performance and robustness. Since the neighbour cell list is typically quite large, it is typically repeated only once within the 1 .28 second cycle. Accordingly a UE has to wait for that period of time to receive the neighbour cell information.
  • Figure 5 demonstrates by way of example how different SIBs (and SIB segments) can be scheduled over time.
  • the superscript index indicates the SIB segment index.
  • SIB4 com- prises two segments, namely SIB4 1 and SIB4 2 .
  • SIB5 comprises five segments, namely SIB5 1 , SIB5 2 , SIB5 3 , SIB5 4 , and SIB5 5 .
  • SIB1 1/SIB1 1 bis contains a lot of UMTS neighbour information (and SIB19 also contains GSM and LTE inter-RAT neighbour cells), and thus are sent only once during the 1 .28s cycle. Consequently a UE requires 1.28s to get the information on all the neighbour cells.
  • the column 502 shows the time at which the SIBs are sent, and the columns at 504 show the SIBs that are sent at that time.
  • SIB5 is segmented such that SIB5 1 and SIB5 2 are initially sent near the beginning of the cycle.
  • each cell or box in the table represents a 20ms slot. That is, referring to Figure 5 first row MIB and SIB7 are sent at 0ms, SIB1 and SIB2 are sent at 20ms, SIB5 1 is sent at 40ms and SIB5 2 is sent at 60ms.
  • second row SIB5 3 is sent after 100ms, SIB5 4 is sent after 120ms and SIB5 5 is sent after 140ms.
  • SIB5 1 and SIB5 2 are sent after 680ms and 700ms respectively
  • SIB5 3 , SIB5 4 and SIB5 5 are sent after 740ms, 760ms and 780ms respectively.
  • SIB1 1 1 is sent after 1200ms
  • SIB1 1 14 may in actual fact be sent after 1220ms dependent upon the duration of each cell/box.
  • SIB1 1 comprises sixteen segments, namely SI B1 1 1 to SIB1 1 16 . There is not enough time in the 1.28s cycle to repeat the sending of all of the SIB1 1 blocks. Accordingly SI B1 1 1 and SIB1 1 2 are sent at 400ms in to the cycle. SIB1 1 3 , SIB1 1 4 and SIB1 1 5 are sent at 480ms. SIB1 1 6 , SIB1 1 7 and SIB1 1 8 are sent at 560ms. SIB1 1 9 and SIB1 1 10 are sent at 1040ms. SIB1 1 11 , SIB1 1 12 and SIB1 1 13 are sent at 1 120ms. SIB1 1 14 , SIB1 1 15 and SIB1 1 16 are sent at 1200ms.
  • the MIB and the SIBs are sent on the broadcast channel (BCH).
  • BCH broadcast channel
  • Figure 6 shows a scheduling arrangement according to an embodiment.
  • the embodiments of Figure 6 relates to a 1.28 second cycle. Other embodiments may relate to cycles of different lengths.
  • the cycle time is represented by column 602.
  • the SIB content of a first channel is shown in column 604.
  • This channel may be a broadcast channel.
  • This channel may be a legacy broadcast channel.
  • Column 606 shows the SIB content of a second, additional, channel.
  • the second channel is a separate channel from the first channel.
  • the second channel may also be a broadcast channel, which may operate in parallel with the first channel.
  • each SIB (and MIB) according to this embodiment is apparent from Figure 6.
  • the SIB5 blocks are again separated into five segments. Each of these segments is sent on the first channel, shown at column 604.
  • the SIB5 1 and SIB5 2 blocks are sent at 0ms
  • the SIB5 3 , SIB5 4 and SIB5 5 blocks are sent at 80ms.
  • SIB1 1 blocks are segregated into 15 segments (SI B1 1 1 to SIB1 1 15 ).
  • SIB1 1 1 and SIB1 1 2 are sent at 400ms.
  • SIB1 1 3 , SIB1 1 4 and SIB1 1 5 are sent at 480ms.
  • SIB1 1 6 , SIB1 1 7 and SIB1 1 8 are sent at 560ms.
  • SIB1 1 9 and SIB1 1 10 are sent at 1040ms.
  • SIB1 1 11 , SIB1 1 12 and SIB1 1 13 are sent at 1 120ms.
  • SIB1 1 14 and SIB1 1 15 are sent at 1200ms.
  • SIB1 1 messages are also sent on the second, parallel channel as shown at 606.
  • SIB1 1 1 to SIB1 1 3 are sent at 0ms.
  • SIB1 1 4 to SIB1 1 7 are sent at 80ms.
  • SIB1 1 8 to SIB1 1 11 are sent at 160ms.
  • SIB1 1 12 to SIB1 1 15 are sent at 240ms.
  • the UE has been sent, and has accordingly received, all of the necessary SIB messages after 640ms. This compares with 1280ms had all the information been sent on the first, legacy broadcast channel only.
  • the sending of the SIB1 1 messages on the parallel BCH is repeated in the second half of the 1 .28 second cycle. That is SIB1 1 1 to SIB1 1 3 are sent at 640ms. SIB1 1 4 to SIB1 1 7 are sent at 720ms. SIB1 1 8 to SIB1 1 11 are sent at 800ms. SIB1 1 12 to SIB1 1 15 are sent at 880ms. Therefore the repeated information is also more quickly sent and received in comparison with use of the legacy channel only.
  • the cycle time is shown at 702.
  • the SIB content of the first channel which may be a legacy channel, is shown at 704.
  • the SIB content of a second, parallel channel is shown at 706.
  • both the first and second channels are again broadcast channels.
  • the scheduling of each SIB segment according to this embodiment is apparent from viewing Figure 7.
  • SIB1 , SIB2, SIB3, SIB4, SIB5, SIB1 1 and SIB19 are sent on the first channel.
  • SIB1 1 and SIB19 messages are also sent on the second channel. That is a plurality of SIB types may be sent on each channel.
  • the SIB1 1 blocks comprise nine segments, i.e. SIB1 1 1 to SIB1 1 9 .
  • the legacy channel (column 704) of Figure 7, it takes the full 1 .28s cycle time for all of the SIBs to be received (SIB1 1 7 to SIB1 1 9 being sent at the 1200ms timeslot on the legacy channel).
  • SIB1 1 and SIB19 blocks may comprise neighbour cell-list information.
  • the embodiment of Figure 7 may be particularly useful where the number of neighbouring cells is not excessively large and/or if the network does not deploy advanced features, such as enhanced class barring (EAB) or further enhanced FACH (FE-FACH), which require SIB21 and/or SIB22 messages.
  • advanced features such as enhanced class barring (EAB) or further enhanced FACH (FE-FACH), which require SIB21 and/or SIB22 messages.
  • embodiments may increase the speed with which SIB mes- sages can be sent to, and received at, a UE.
  • the UE may therefore receive the necessary information, and begin operating correctly, in less time than in a legacy system. This may improve the user experience.
  • the scheduling order set out in Figures 6 and 7 is by way of exam- pie only, and that in other embodiments the scheduling may differ.
  • the SIB1 1 messages are sent on the additional channel
  • the SIB1 1 and SIB19 messages are sent on the additional channel.
  • any SIB can be sent on the legacy channel and/or the additional channel.
  • any of SIB1 to SIB22 types can be sent on the first and/or additional channel(s).
  • different segments of the same SIB type may be sent on different channels.
  • SIB1 1 1 to SIB1 1 8 may be sent on the first channel, and SIB1 1 9 to SI B1 1 15 can be sent on the additional channel.
  • the segregation of these segments can of course be varied in any way between the channels.
  • only some of the information that is sent on the first channel is repeated or duplicated on the second channel. That is the SIBs sent on the second channel may constitute a portion of the SIBs that are also sent on the second channel.
  • the information sent on the first channel may be repeated/duplicated in its entirety on the second channel.
  • the order in which the SIBs are sent on each channel is not limited.
  • SIB segments are sent on each channel may differ between embodiments.
  • Duplicated SIBs which are received on the "additional" channel might not necessarily be received after they are sent on the first channel.
  • the duplicated or same information might be transmitted/received on the additional channel at the same time as, or before, it is transmitted/received on the first channel. That is the duplicated information may be received on the different channels in a time-shifted manner.
  • first channel a first channel and a second channel.
  • SIBs that are sent/received may be separated and/or shared between any number of a plurality of channels.
  • first and second are used to differentiate between channels, and does not necessarily constitute any temporal limitations. That is the "first" channel is not necessarily established before the "second” channel.
  • the timing between each channel may be synchronised. That is each cycle will begin at the same time on each channel, and accordingly each time interval (e.g.
  • the "duplicated" or “same" information that is received on the second channel is received at the same time as it is received on the first channel. In other embodiments the "duplicated” information may be received on the second channel be- fore it is received on the first channel. In other embodiments the "duplicated” information may be received on the second channel after it is received on the first channel.
  • one channel may be considered to have priority over another chan- nel.
  • Information that is deemed most important to correct functioning of a UE may be sent on the channel with the higher priority. Any information that is considered less important may be sent on channel(s) of lower priority.
  • all the SIB information that is to be sent to a UE may be sent on the first channel.
  • Information, such as neighbour-cell information may be desirable for optimal UE performance but not essential for basic functioning of the UE. Accordingly the neighbour cell information, which may be contained for example in SIB1 1 and SIB 19 blocks, may also be sent on the second channel as well as on the first channel.
  • information is sent to the UE to indicate that multi-channel SIB signalling is supported. In this way the UE can be informed to check multi- pie channels for the SIB messages.
  • Information which may also be in the form of an indicator, can be sent to a UE to inform the UE that information received on a given channel is a duplicate or the same as information received on another channel. This may further speed up decoding of the SIB messages since the UE can then determine that it may not need to wait for the same information on the other channel.
  • These "indicators" may be comprised in one or more SIBs. The use of such indicators may facilitate inter-operability with legacy systems and legacy UEs. For example a legacy UE may not detect the new channel or be able to read the indicator informing the UE of the additional channel, while new UEs will have the capability to detect the new channel and also read the indicator to detect that some SIB content is duplicated.
  • the required data processing apparatus and functions of a base station apparatus, a communication device and any other appropriate station may be provided by means of one or more data processors.
  • the described functions at each end may be provided by separate processors or by an integrated processor.
  • the data processors may be of any type suitable to the local technical environment, and may include one or more of general purpose com- puters, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), gate level circuits and processors based on multi core processor architecture, as non-limiting examples.
  • the data processing may be distributed across several data processing modules.
  • a data processor may be provided by means of, for example, at least one chip. Appropriate memory capacity can also be provided in the relevant devices.
  • the memory or memories may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof. Some embodiments may be implemented by computer software executable by a data processor of the communication device, such as in the processor entity, or by hardware, or by a combination of software and hardware.
  • any blocks of the logic flow as in the Figures may represent program steps, or interconnected logic circuits, blocks and functions, or a combination of program steps and logic circuits, blocks and functions.
  • the software may be stored on such physical media as memory chips, or memory blocks implemented within the processor, magnetic media such as hard disk or floppy disks, and optical media such as for example DVD and the data variants thereof, CD.
  • the memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • suitable data storage technology such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.

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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

L'invention concerne un procédé qui consiste : à recevoir des informations de système sur un premier canal; à recevoir des informations de système sur un second canal. Lesdites informations de système sont reçues dans une période de temps, et au moins certaines desdites informations de système reçues sur ledit second canal sont les mêmes que des informations de système reçues sur ledit premier canal; et le procédé consiste à recevoir les informations de système sur le second canal d'une manière basée sur le temps par rapport à la réception d'informations de système sur le premier canal.
PCT/EP2014/051355 2014-01-24 2014-01-24 Procédé, appareil et programme d'ordinateur WO2015110164A1 (fr)

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CN113709828A (zh) * 2020-05-22 2021-11-26 展讯通信（上海）有限公司 系统消息的接收方法及装置、存储介质、多模终端

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