CN102917437B - Method of acquiring system information in wireless communication system - Google Patents

Method of acquiring system information in wireless communication system Download PDF

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Publication number
CN102917437B
CN102917437B CN201210348190.7A CN201210348190A CN102917437B CN 102917437 B CN102917437 B CN 102917437B CN 201210348190 A CN201210348190 A CN 201210348190A CN 102917437 B CN102917437 B CN 102917437B
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China
Prior art keywords
system information
described
ue
schedule
bs
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CN201210348190.7A
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Chinese (zh)
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CN102917437A (en
Inventor
成斗铉
郑载薰
朴奎镇
李银终
赵汉奎
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Lg电子株式会社
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Priority to US97317707P priority Critical
Priority to US60/973,177 priority
Priority to US97377007P priority
Priority to US60/973,770 priority
Priority to US98239207P priority
Priority to US60/982,392 priority
Priority to US98777507P priority
Priority to US60/987,775 priority
Priority to KR1020080018755A priority patent/KR20090029620A/en
Priority to KR10-2008-0018755 priority
Priority to KR10-2008-0063603 priority
Priority to KR1020080063603A priority patent/KR20090029623A/en
Application filed by Lg电子株式会社 filed Critical Lg电子株式会社
Publication of CN102917437A publication Critical patent/CN102917437A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/20Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies
    • Y02D70/24Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies in Discontinuous Reception [DRX] networks

Abstract

A method of acquiring system information in a wireless communication system includes receiving scheduling system information including scheduling information indicating a start time of dynamic system information, monitoring the dynamic system information from a start time of the dynamic system information according to the scheduling system information, and ending the monitoring of the dynamic system information upon receiving a system information end indicator indicating an end time of the dynamic system information. Since an end time of dynamic system information is indicated, a process of acquiring system information can be further effectively performed.

Description

Obtain the method for system information in a wireless communication system

The application is the national applications number submitted on March 18th, 2010 for 200880107648.1(international application no is PCT/KR2008/005523, the applying date is on September 18th, 2008), denomination of invention is the divisional application of " method obtaining system information in a wireless communication system " patent application.

Technical field

The present invention relates to radio communication, and more specifically, relate to the method obtaining system information in a wireless communication system.

Background technology

Third generation partner program (3GPP) mobile communication system based on Wideband Code Division Multiple Access (WCDMA) (WCDMA) radio access technologies is dispersed throughout the whole world widely.High-speed downlink packet access (HSDPA) that can be defined as the first evolution stage of WCDMA provides the radio access technologies in the near future with high competitiveness for 3GPP.But, because the demand of user and service provider constantly improves with expecting, and the exploitation of the radio access technologies that is constantly at war with, so need the new technology evolution in 3GPP to ensure competitiveness in the future.

Usually, in the coverage of base station (BS), there is one or more community.Multiple subscriber equipment (UE) can be arranged in a community.When UE attempts the community that initially access is new, downlink synchronization is carried out to UE, and UE is from the network reception system information (or referred to as SI) that will access.SI comprises UE needs and knows so that carry out with BS the necessary information that communicates.Therefore, UE must receive SI completely before access BS, and must always keep up-to-date SI.BS notifies many essential informations required for access network by using SI to UE.

SI comprises various SI parameter.Usually, BS sends SI parameter in a distributed manner according to the transmission cycle of definition, instead of sends whole SI parameters simultaneously.BS must to the schedule information of UE notice for sending SI parameter.UE monitors SI according to the schedule information of SI.If there is no SI schedule information accurately, then UE must persistent surveillance SI, and this may cause unnecessary power consumption.

Therefore, need to notify SI schedule information accurately, make UE effectively can obtain SI further.

Summary of the invention

Technical problem

The invention provides a kind of method for obtaining system information.

Technical solution

According to an aspect of the present invention, a kind of method obtaining system information in a wireless communication system, comprising: receiving scheduling system information, and described schedule system information comprises the schedule information of the time started of instruction dynamic system information; According to described schedule system information supervision dynamic system information from the time started of described dynamic system information; And when receiving the system information end indicator of end time of instruction dynamic system information, terminate the supervision of dynamic system information.

According to a further aspect in the invention, a kind of method upgrading system information in a wireless communication system comprises: monitor that downlink control channel changes notice with detection system information; And when detecting that changing system information notifies, receiving at least one dynamic system information message and schedule system information message, described schedule system information message comprises the renewal designator of the renewal of instruction dynamic system information message.

Beneficial effect

According to the present invention, owing to indicating the end time of dynamic system information, so the process obtaining system information effectively can be performed further.Substituting as continuous receiving system information, user equipment monitors physical downlink control channel (PDCCH), and if the system information of changing, then receive the dynamic system information of the renewal sent by physical down link sharing channel (PDSCH), thus reduce battery consumption.The change of report system information is carried out by PDCCH in base station, and by PDSCH send about dynamic system information schedule information and upgrade designator.Therefore, subscriber equipment can upgrade system information effectively when not performing unnecessary process.

Accompanying drawing explanation

Fig. 1 shows the structure of wireless communication system.

Fig. 2 is the diagram of the function sharing illustrated between universal terrestrial radio electricity access network (E-UTRAN) and the block core (EPC) of evolution of evolution.

Fig. 3 is the block diagram of the element that subscriber equipment (UE) is shown.

Fig. 4 is the diagram of the radio protocol architecture illustrated for user plane.

Fig. 5 is the diagram of the radio protocol architecture illustrated for control plane.

Fig. 6 shows the mapping between downlink logical channel and downlink transmission channel.

Fig. 7 shows the mapping between uplink logical channel and uplink transmission channels.

Fig. 8 shows the mapping between downlink transmission channel and downlink physical channel.

Fig. 9 shows the mapping between uplink transmission channels and uplink physical channel.

Figure 10 is the flow chart of the process that transmitting system information is shown.

Figure 11 shows the example of the scheduling for dynamic system information.

Figure 12 shows according to an embodiment of the invention for obtaining the method for system information.

Figure 13 shows the method for obtaining system information according to another embodiment of the present invention.

Figure 14 shows the method for obtaining system information according to another embodiment of the present invention.

Figure 15 shows the frame-layer structure of the transmission for interpre(ta)tive system information.

Figure 16 shows the conventional method for receiving system information.

Figure 17 illustrates according to an embodiment of the invention for the flow chart of the method by UE receiving system information.

Figure 18 shows according to an embodiment of the invention for the method for transmitting system information.

Figure 19 shows according to an embodiment of the invention for upgrading the method for system information.

Embodiment

Fig. 1 shows the structure of wireless communication system.This wireless communication system can have the network configuration of the Universal Mobile Telecommunications System (E-UMTS) of evolution.E-UMTS can be called Long Term Evolution (LTE) system.Described wireless communication system can be widely used in providing various communication service, such as voice, grouped data etc.

With reference to figure 1, the UMTS terrestrial radio access network network (E-UTRAN) of evolution comprises at least one base station (BS) 20 providing control plane and user plane.

Subscriber equipment (UE) 10 can be fixing or movement, and can be referred to as another term, such as mobile radio station (MS), user terminal (UT), subscriber station (SS), wireless device etc.BS 20 is generally the fixed station carrying out with UE 10 communicating, and can be referred to as another term, the Node B (eNB), base station transceiver system (BTS), access point etc. of such as evolution.One or more community is there is in the coverage of BS 20.The interface for sending customer service or service control can be used between BS 20.Hereinafter, down link (DL) is defined as the communication link of from BS 20 to UE 10, and up link (UL) is defined as the communication link of from UE 10 to BS 20.

BS 20 is interconnected by X2 interface.Also by S1 interface, BS 20 is connected to the block core (EPC) of evolution, more specifically, is connected to mobile management entity (MME)/gateway (S-GW) 30.S1 interface is supported in the many-to-many relationship between BS 20 and MME/S-GW 30.

Fig. 2 is the diagram of the function sharing illustrated between E-UTRAN and EPC.

With reference to figure 2, beat the frame instruction radio protocol layers of oblique line, and the functional entity of white edge instruction control plane.

BS performs following functions: (1), for the function of provided for radio resources management (RRM), the Dynamic Resource Allocation for Multimedia controlled and to UE is moved in such as radio bearer control, radio access control, connection; (2) encryption of Internet protocol (IP) header-compressed and customer traffic; (3) to the route of the user plane data of S-GW; (4) scheduling of beep-page message and transmission; (5) scheduling of broadcast message and transmission; And (6) are for the measurement of mobility and scheduling and measurement report configuration.

MME performs following functions: (1) non access stratum (NAS) signaling; (2) NAS signalling security; (3) idle pulley UE getatability; (4) tracking zone list management; (5) roam; And (6) certification.

S-GW performs following functions: (1) mobile grappling; And (2) lawful intercept.PDN Gateway (P-GW) performs following functions: (1) UE IP distributes; And (2) packet filtering.

Fig. 3 is the block diagram of the element that UE is shown.

Processor 51, memory 52, radio frequency (RF) unit 53, display unit 54 and user interface section 55 is comprised with reference to figure 3, UE 50.

Radio interface protocol layers is realized in processor 51.Processor 51 provides control plane and user plane.The function of every one deck can realize in processor 51.Processor 51 performs hereafter by the acquisition of the system information of description and update process.

Memory 52 is coupled to processor 51 and storage operation system, application and generic-document.Display unit 54 shows the various information of UE 50, and can use known element, such as liquid crystal display (LCD), Organic Light Emitting Diode (OLED) etc.User interface section 55 can be configured with the combination of known user interface, known user interface such as keypad, touch-screen etc.RF unit 53 is coupled to processor 51 and sends and/or receive radio signals.

Radio interface protocol layers between UE and network can be classified as L1 layer (ground floor), L2 layer (second layer) and L3 layer (third layer) based on lower three layers of open system interconnection (OSI) (OSI) model known in communication system.Physical layer, or be briefly PHY layer, belong to ground floor, and provide information transfer service by physical channel.Radio resource controls (RRC) layer and belongs to third layer, and for controlling the radio resource between UE and network.UE and network exchange RRC information via rrc layer.

Fig. 4 is the diagram of the radio protocol architecture illustrated for user plane.Fig. 5 is the diagram of the radio protocol architecture illustrated for control plane.Which illustrate the framework of the radio interface protocol between UE and E-UTRAN.User plane is the protocol stack for user data transmission.Control plane is the protocol stack for control signal transmission.

With reference to figure 4 and Fig. 5, PHY layer belongs to ground floor, and by physical channel for upper strata provides information transfer service.PHY layer controls (MAC) layer (that is, the upper strata of PHY layer) by transmission channel and media interviews and is coupled.Between MAC layer and PHY layer, data are transmitted by transmission channel.Between different PHY layer (that is, the PHY layer of transmitter and the PHY layer of receiver), transmit data by physical channel.OFDM (OFDM) can be passed through and modulate PHY layer.Time and/or frequency can be used as radio resource.

MAC layer belongs to the second layer, and comes to provide service to radio link control (RLC) layer (that is, the upper strata of MAC layer) by logic channel.Rlc layer in the second layer supports authentic data transmission.According to data transferring method, in rlc layer, there is three kinds of operator schemes, that is, transparent mode (TM), unacknowledged mode (UM) and affirmation mode (AM).TMRLC is following pattern, in this mode, when configuring rlc protocol data cell (PDU), does not add expense to the RLC service data unit (SDU) sent from upper strata.PDU represents the blocks of data unit sent from current layer to another layer.Because RLC allows the transparent transmission of SDU, so be called TM RLC.UM RLC allows receiver side to know, when by the PDU header comprising sequence number (SN) is attached to each PDU to transmit, which PDU loses.When the transmission failure of RLC PDU, AM RLC provides bidirectional data transfers service and supports again to transmit.

Packet data convergence protocol (PDCP) layer belongs to the second layer, and performs header compression function.When sending the IP grouping of such as IPv4 grouping or IPv6 grouping, the header of IP grouping can comprise relatively large with unnecessary control information.PDCP layer reduces the header size of IP grouping, so that effectively send IP grouping.

Radio resource controls (RRC) layer and belongs to third layer, and only defines in the control plane.Rrc layer is used for the configuration of radio bearer (RB), reconfigures and discharge control logic channel, transmission channel and physical channel explicitly.RB is the service for transmitting data between UE and E-UTRAN provided by the second layer.When setting up RRC and connect between the rrc layer and the rrc layer of network of UE, be called that UE is in RRC connection mode.When also not setting up RRC and connecting, be called that UE is in RRC idle pulley.

RRF connection mode represents that wherein UE is connected to the state of the RRC of E-UTRAN.RRC connection mode can be characterized as follows: (1) UE has the context of the information for RB configuration, user plane data can be sent between BS and UE by this RB configuration; (2) E-UTRAN knows the community belonging to UE; (3) network can send data to UE and receive data from UE, and can the movement of control UE; (4) neighbor cell measurement can be performed; And (5) PDCP/RLC/MAC layer can be performed, monitor in the control signal channel of the distribution of the data channel for UE between UE and network, send/receive data, reporting channel quality information and feedback information and in order to the energy-conservation of UE and the effective utilization of resources are to configure discontinuous reception (DRX) cycle.

Non access stratum (NAS) layer belongs to the upper strata of rrc layer, and for performing session management, mobile management etc.

Fig. 6 shows the mapping between downlink logical channel and downlink transmission channel.Fig. 7 shows the mapping between uplink logical channel and uplink transmission channels.This can at 3GPP TS 36.300 V8.3.0(2007-12) the 6.1.3 joint of technical specification group radio access network; Universal terrestrial radio electricity access (E-UTRA) of evolution and universal terrestrial radio electricity access network (E-UTRAN) of evolution; Summary description; Stage 2(the 8th edition) in find.

With reference to figure 6 and Fig. 7, in the downlink, Paging Control Channel (PCCH) is mapped to paging channel (PCH).Broadcast Control Channel (BCCH) is mapped to broadcast channel (BCH) or downlink sharied signal channel (DL-SCH).Common Control Channel (CCCH), Dedicated Control Channel (DCCH), Dedicated Traffic Channel (DTCH), multicast control channel (MCCH) and Logical Traffic Channels (MTCH) are mapped to DL-SCH.MCCH and MTCH is also mapped to Multicast Channel (MCH).In the uplink, CCCH, DCCH and DTCH are mapped to uplink shared channel (UL-SCH).

According to the type of the data that will send, the logic channel be mapped on transmission channel is classified as control channel and Traffic Channel.Described control channel is for sending the information of control plane.According to the type of control information, described control channel can be Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Dedicated Control Channel (DCCH), multicast control channel (MCCH) etc.PCCH is the downlink channel for sending paging information, and uses when network does not know the position of UE.CCCH is the channel for sending control information between UE and network, and between UE and network, do not set up use when RRC connects.MCCH is the point-to-multipoint downlink channel for sending multicast broadcast multimedia service (MBMS) control information from network to UE.MCCH is used by the UE receiving MBMS.DCCH is the point-to-multipoint two-way channel for sending dedicated control information between UE and network, and is used by the UE with RRC connection.

Traffic Channel is for sending the business datum of user.Traffic Channel can be Dedicated Traffic Channel (DTCH), MBMS channel (MTCH) (wherein MBMS represents multicast broadcast multimedia service) etc.Transmission channel is for sending the data of sending from logic channel.Can by multiple mapping logical channels on a transmission channel.

To classify transmission channel according to the type of the transfer of data of being undertaken by radio interface and characteristic.BCH is broadcasted in the whole overlay area of community, and has fixing predefined transformat.The feature of DL-SCH is, supports hybrid automatic repeat-request (HARQ); Dynamic link adaptation is supported by changing modulation, coding and sending (Tx) power; Can carry out broadcasting in whole community and can Wave beam forming be used; Support dynamically and both semi-persistent resource assignment, the discontinuous reception (DRX) of support UE, energy-conservation to make it possible to carry out UE; And support MBMS transmission.The feature of PCH is, supports that DRX makes UE can carry out the energy-conservation and demand that is that broadcast in the whole overlay area of community of UE.The feature of MCH is, is supported in the demand broadcasted in the whole overlay area of community and supports MBMS Single Frequency Network (MBSFN).

UL-SCH and Random Access Channel (RACH) are uplink transmission channels.The feature of UL-SCH is, supports for changing modulation, coding and the dynamic link adaptation of Tx power, and supports that HARQ and dynamically/semi-persistent resource are distributed.The feature of RACH is, limited control information and collision risk.

Fig. 8 shows the mapping between downlink transmission channel and downlink physical channel.Fig. 9 shows the mapping between uplink transmission channels and uplink physical channel.

With reference to figure 8 and 9, downlink transmission channel is used for sending data from network to UE.The example of downlink control channel comprises for the broadcast channel (BCH) of transmitting system information, for sending the paging channel (PCH) of beep-page message and the downlink sharied signal channel (DL-SCH) for sending customer service or control message.Can at DL-SCH or upper business or the control message sending Downlink multicast or broadcast service of downlink Multicast Channel (MCH).In the downlink, BCH is mapped to Physical Broadcast Channel (PBCH).MCH is mapped to Physical Multicast Channel (PMCH).PCH and DL-SCH is mapped to physical down link sharing channel (PDSCH).PBCH carries BCH transmission block.PMCH carries MCH.PDSCH carries DL-SCH and PCH.

Uplink transmission channels is used for sending data from UE to network.The example of uplink transmission channels comprises the Random Access Channel (RACH) for sending initial control message and the uplink shared channel (UL-SCH) for sending customer service or control message.In the uplink, UL-SCH is mapped to physical uplink link shared channels (PUSCH).RACH is mapped to Physical Random Access Channel (PRACH).PRACH carries random access guiding.

In the phy layer, the example of downlink channel comprises the physical downlink control channel (PDCCH) for sending control information and the physical down link sharing channel (PDSCH) for sending user data and/or control information.In the phy layer, the example of uplink channel comprises physical uplink control channel (PUCCH) and physical uplink link shared channels (PUSCH).PDCCH notifies the resource assignation of PCH and DL-SCH to UE, and notifies the HARQ information relevant to DL-SCH to UE.PDCCH can carry uplink scheduling to be permitted, and this uplink scheduling permits the resource assignation being used for ul transmissions to UE notice.Physical control format indicator channel (PCFICH) is used for the number of OFDM (OFDM) symbol of PDCCH to UE notice, and is sent out in each subframe.Physical Hybrid ARQ Indicator channel (PHICH) carries HARQ positive acknowledgement (ACK)/Negative Acknowledgement (NACK) signal in response to ul transmissions.Physical uplink control channel (PUCCH) carries the uplink control information of such as HARQ ack/nack signal in response to downlink transmission, dispatch request, CQI (CQI) etc.

Now, by the transmission of descriptive system information.BS manages the radio resource of one or more community.Community is configured to have such as 1.25,2.5,5,10, one of the bandwidth of 20MHz, and provide down link or uplink transmission services to some UE.In this case, different communities can be configured to provide different bandwidth.Cell configuration can be realized by using some frequencies mode overlapping geographically with such as some communities.BS is used for the essential information of network insertion by using system information (or referred to as SI) to UE notice.SI comprises UE needs and knows so that access the necessary information of BS.Therefore, UE must receive SI completely before access BS, and always must keep up-to-date SI.Because SI is necessary for known to the UE in a community, so BS periodically sends SI.

SI is the RRC information for sending multiple system information block (SIB).The SIB sent as system information has and is called periodic identical schedulable condition.One or more SI message can be sent with same period.Each SIB comprises SI parameter.

Figure 10 is the flow chart of the process that transmitting system information is shown.

Primary system information (Systen information master, SI-M) (step S110) is sent to UE with reference to Figure 10, BS.This SI-M is sent by broadcast channel (BCH).The system information sent by BCH comprises a SIB.SIB is called Master Information Block (MIB).SI-M comprises PHY layer parameter, System Frame Number (SFN), schedule information etc. about schedule system information.SI-M is also referred to as broadcast system information.

PHY layer parameter can comprise the number, reference signal transmitted power etc. of dl system bandwidth, transmitting antenna.When not using specific method to send SFN, send SFN by being included in SI-M by SFN.SI-M can be sent by fixing periodicity.SI-M can be sent with the cycle of 40ms.In multiple pieces of system information, schedule system information is sent in a repetitive fashion the most continually.

BS sends schedule system information (SI-1) (step S120) to UE.In multiple pieces of system information, schedule system information is sent in a repetitive fashion the most continually, and is sent by downlink sharied signal channel (DL-SCH).UE can obtain the schedule information about schedule system information from SI-M.Schedule system information comprises the schedule information about dynamic system information.

About the periodicity of the system information of schedule information instruction except schedule system information of dynamic system information.Such as, the time started of dynamic system information can be indicated about the schedule information of dynamic system information.Schedule system information comprises the renewal designator of the more new state of instruction dynamic system information.Upgrade designator instruction dynamic system information whether to be modified.Such as, UE can use renewal designator to determine whether the system information previously obtained is that effective information is until UE returns this cell coverage area after shifting out cell coverage area.Schedule system information may further include one or more public land mobile networks (PLMN) identifier, the tracing area code for the tracing area belonging to identifying cells, the cell ID as the unique identifiers of community, system information block mapping information etc. for identifying the community providing radio to access.Schedule system information can be sent with fixing periodicity.Schedule system information can be sent with the cycle of 80ms.

BS sends dynamic system information (SI-x) (step S130) to UE.This dynamical system system is sent by DL-SCH.The dynamic system information sent by DL-SCH comprises some the system informations be not included in broadcast system information.Schedule system information frequently is sent out than dynamic system information.UE can obtain the schedule information about dynamic system information from schedule system information.The transmission cycle of dynamic system information is not fixing.Therefore, dynamic system information is sent according to the transmission cycle determined by schedule system information.

Hereinafter, the schedule information about the dynamic system information be included in dispatching patcher will be described.

Figure 11 shows the example of the scheduling for dynamic system information.

With reference to Figure 11, schedule system information provides schedule information to many dynamic system information.The schedule information about many dynamic system information is indicated in the scope of the time window be assigned in dynamic system information.The scope of expression time window can be carried out with time started and window size.

Such as, suppose schedule system information, that is, SI-1, provide the schedule information about three dynamic system information (that is, SI-p, SI-q and SI-r).Table 1 shows the example of the schedule information about dynamic system information.

Table 1

[table 1]

[table]

Dynamic SI The time started of time window Window size SI-p Tp Wp SI-q Tq Wq SI-r Tr Wr

The type (that is, SI-p, SI-q and SI-r) of schedule system information instruction dynamic system information.The time started Tp of the time window of schedule system information instruction SI-p and window size Wp, the time started Tq of the time window of instruction SI-q and window size Wq, and indicate time started Tr and the window size Wr of the time window of SI-r.The time window size of each bar dynamic system information is indicated as has identical size or different sizes.The time window of each bar dynamic system information does not overlap each other.Each dynamic system information is sent in the scope of the time window of correspondence.UE obtains the scope of dynamic system information from schedule system information, and therefore detects the dynamic system information within the scope of this time window.

UE monitors during the dynamic system information scope obtained from schedule system information whether dynamic system information is sent by PDCCH.Supervision detects the information of expectation by decoding to the signal received by respective channel.The identifier be used to indicate in the presence/absence of system information is called system information identifier.When system information identifier being detected on PDCCH, UE receives dynamic system information by PDSCH.Can (or can not) send dynamic system information by the window size less than time window scope.If UE monitors and all PDCCH decoded within the scope of the time window of dynamic system information where necessary, then may generate unnecessary load.

Figure 12 shows according to an embodiment of the invention for obtaining the method for system information.

With reference to Figure 12, schedule system information indicates the schedule information about many dynamic system information according to the time started of dynamic system information.

Such as, suppose schedule system information, that is, SI-1, provide about three dynamic system information, that is, the schedule information of SI-p, SI-q and SI-r.Table 2 shows the example of the schedule information about dynamic system information.

Table 2

[table 2]

[table]

Dynamic SI The time started of dynamic SI SI-p Tp SI-q Tq SI-r Tr

Schedule system information indicates the type (that is, SI-p, SI-q and SI-r) of each bar dynamic system information, and indicates time started Tp, Tq and Tr of each bar dynamic system information.BS sends each bar dynamic system information at the time started place of each bar dynamic system information.But BS sends dynamic system information, until the time started of follow-up dynamic system information starts.That is, BS sends each bar dynamic system information, makes each bar dynamic system information not overlapping in the time domain.UE monitors dynamic system information in the time started of the dynamic system information obtained from schedule system information place.That is, UE after the time started from PDCCH detection system information identifier.When system information identifier being detected from PDCCH, UE receives dynamic system information.

The end time of every bar dynamic system information is indicated by SI end indicator.End indicator indicates the end time of every bar dynamic system information.The subframe that SI end indicator can indicate dynamic system information to terminate.The message of MAC layer, rlc layer or rrc layer can be used to send SI end indicator.SI end indicator can be assigned to the last part of dynamic system information, to indicate the transmission completing dynamic system information.SI end indicator can be sent by PDCCH.The end of the transmission of dynamic system information impliedly can be reported by PDCCH.Such as, can be indicated by PDCCH ' transmission block size=0 ', or the value that in fact can not be used for radio resource can be used to indicate the end of the transmission of dynamic system information.UE stops when receiving SI end indicator receiving dynamic system information, and receives next dynamic system information at the time started place of next dynamic system information.That is, when receiving SI end indicator, UE can not monitor PDCCH, until spent the time started of next dynamic system information, so that receive dynamic system information.

Thus, because schedule system information indicates schedule information about dynamic system information by using time started of dynamic system information, so the size of schedule system information can be reduced, thus the expense caused due to signaling is reduced.In addition, when not limiting the size of time window of dynamic system information, effectively dynamic system information can be dispatched further.In addition, owing to indicating the end time of the transmission of dynamic system information, so UE does not perform the unnecessary decoding of PDCCH.Therefore, can battery consumption be reduced, and effectively can perform the process obtaining system information further.

Figure 13 shows the method for obtaining system information according to another embodiment of the present invention.

With reference to Figure 13, schedule system information can upgrade designator according to the SI-x of the more new state of the time started of dynamic system information and instruction dynamic system information and indicate schedule information about dynamic system information.

Suppose schedule system information, that is, SI-1, provide the schedule information about three dynamic system information (that is, SI-p, SI-q and SI-r).Schedule system information indicates the time started of these three dynamic system information, and upgrades the state of each bar dynamic system information.Table 3 shows the example of the schedule information about dynamic system information.

Table 3

[table 3]

[table]

Dynamic SI The time started of dynamic SI SI-x upgrades designator SI-p Tp 1 bit SI-q Tq 1 bit SI-r Tr 1 bit

Schedule system information indicates the time started of the more new state of every bar dynamic system information and every bar dynamic system information.SI-x upgrades designator and uses 1 bit to indicate the more new state of corresponding dynamic system information.Only indicate for the dynamic system information of its more new state for being upgraded designator by SI-x, UE can receive dynamic system information from the time started to end time of dynamic system information.Because UE only optionally can receive the dynamic system information of the renewal in many dynamic system information, so the process obtaining system information can be skipped when unnecessary.Therefore, battery consumption can be reduced.

Such as, when UE returns this cell coverage area after shifting out cell coverage area, some many dynamic system information previously obtained can be the information of effective information or renewal.Wherein, UE by the dynamic system information using SI-x renewal designator only to receive renewal, and can not receive effective dynamic system information again.

Figure 14 shows the method for obtaining system information according to another embodiment of the present invention.

With reference to Figure 14, schedule system information indicates schedule information about many dynamic system information by using the time started of each bar dynamic system information.SI-x can be comprised upgrade designator, to indicate the more new state of every bar dynamic system information in every bar dynamic system information.

Suppose schedule system information, that is, SI-1, the schedule information about three dynamic system information (that is, SI-p, SI-q and SI-r) is provided.As above, shown in table 2, schedule system information only indicates the time started of three dynamic system information.SI-x can be comprised upgrade designator in corresponding dynamic system information.The SI-x renewal designator of every bar dynamic system information can be arranged in the part before every bar dynamic system information.

The SI-x that UE assesses every bar dynamic system information upgrades designator, and, if there is no Regeneration dynamics system information, then can use the effective dynamic system information previously obtained when not decoding to dynamic system information.UE assesses SI-x and upgrades designator, and, if having updated dynamic system information, then from the time started to end time of dynamic system information, receive dynamic system information.Because UE can carry out the dynamic system information optionally only receiving renewal, so can skip the process obtaining system information when unnecessary by each SI-x renewal designator assessed from many dynamic system information.Therefore, battery consumption can be reduced.

Figure 15 shows the frame-layer structure of the transmission for interpre(ta)tive system information.

With reference to Figure 15, radio frame (or superframe) comprises at least one frame.This frame comprises at least one subframe.

At least one control area based on radio frame is assigned to radio frame.Along time domain, the control area based on radio frame can be assigned to the primary importance of this wireless point frame, it can be called radio frame header.Radio frame header can be assigned to the first frame among multiple frames of being included in radio frame.Control area based on radio frame may be used for Common Control Channel.Common Control Channel is used for transmitting system information and the information about the frame be included in radio frame.The system information with fixed cycle property can be sent by Common Control Channel.Such as, can by schedule system information, that is, SI-1, is assigned to the control area based on radio frame.If radio frame has the size of 20ms, then can send the schedule system information with the 80ms period in every four radio frames.

At least one control area based on frame is assigned to frame.Along time domain, the control area based on frame can be assigned to the primary importance of frame, it can be called frame header.Frame header can be assigned to the first subframe among multiple subframes of being included in frame.Based on the control area of frame for sending the information about the multiple subframes be included in frame.Control area based on frame can alternatively for having the system information of fixed cycle property.Such as, schedule system information can be sent by the control area based on frame, that is, SI-1.This frame can have the size of 5ms.The radio frame with the size of 20ms can comprise four frames.

Subframe is the elementary cell of component frame, and comprises multiple OFDM symbol.Subframe can comprise at least one control area based on subframe.Control area based on subframe can be assigned to a part before in each subframe along time domain.Control area based on subframe may be used for the radio resource allocation information indicating subframe.Such as, the unfixed dynamic system information of periodicity (that is, SI-x) can be assigned to subframe, and designator can be upgraded by the SI-x sending every bar dynamic system information based on the control area of subframe.

When frame-layer structure is made up of radio frame, frame and subframe, can transmitting system information in every way.The example of transmitting system information will be described.

(1) schedule system information can be sent by radio frame header, and dynamic system information can be sent by subframe.Schedule information about dynamic system information can be indicated by subframe index.Subframe index is corresponding with the time started of system information.

(2) schedule system information can be sent by the frame header of the particular frame in radio frame, and dynamic system information can be sent by subframe.Schedule information about dynamic system information can be indicated by subframe index by frame header.

(3) schedule system information can be sent by radio frame header or particular frame header, and dynamic system information can be sent by the control area based on subframe.In this case, schedule information about dynamic system information can be indicated by subframe index, and subframe index represents accordingly based on the control area of subframe.

(4) schedule system information can be sent by radio frame header, and dynamic system information can be sent by the control area based on frame.Schedule information about dynamic system information can be indicated by frame index.

The end time of system information can be impliedly defined as the last part of corresponding subframe, and can be assigned to by the last part of system information, this system information is assigned to subframe, or can be indicated by the control area based on subframe.SI upgrades designator and can be sent out together with schedule system information, or can by being undertaken indicating sending by every bar dynamic system information.

Be hereinbefore described the example of transmitting system information in the frame-layer structure be made up of radio frame, frame and subframe.This frame-layer structure is only for exemplary object.Therefore, the layer that frame-layer structure can be divided by other is formed, or can omit layer any one.Such as, sub-frame division can be become less assignment unit, make to assign dynamic system information based on this assignment unit.Even if having modified frame-layer structure, the schedule information of system information also can indicate dynamic system information in an identical manner.

Now, by the change of descriptive system information and renewal.

Figure 16 shows the conventional method for receiving system information.

With reference to Figure 16, because system information is necessary for known to the UE in a community, so BS periodically sends this system information.UE performs decoding by the system information sent to receive periodic continuously.UE communicates with BS, until system information is changed by using the system information received.

Periodically or where necessary can at random change/upgrade system information.But, because UE cannot know the change of system information, so all bar system informations that UE is received by receive periodic perform decoding.When UE is in discontinuous reception (DRX) pattern, according to the predetermined cycle, UE is energized, so that reduce battery consumption, and only receives the system information using beep-page message to send.On the other hand, when UE is in radio resource control (RRC) connection mode, UE receives and all bar system informations of decoding periodic transmission.When previously received system information is known and does not change system information, the battery consumption of UE can be reduced by this way, namely, UE when need not periodically receiving system information by use previously received system information come communicate with BS, and and if only if when changing system information, just receive the system information of change to use.When the UE being in RRC connection mode periodically receive and decode all bar system informations time, unnecessary battery consumption may be there is.

Therefore, a kind of method for effectively changing/upgrading system information is needed.

Figure 17 illustrates according to an embodiment of the invention for the flow chart of the method by UE receiving system information.

Monitor downlink control channel with reference to Figure 17, UE, change notice (step S210) with detection system information.BS sends the message of the change for report system information by downlink control channel.This changing system information notice can be the mark of the change being used to indicate system information, and can be called changing system information radio net temporary mark (RNTI).Downlink control channel can be physical downlink control channel (PDCCH).BS can carry out by PDCCH the mark periodically sending the change being used to indicate system information in a repetitive fashion.

UE monitors downlink control channel at the periodic moments place for the special definition of changing system information notice.When receiving changing system information notice while Uplink Control Channel under surveillance, UE can know that system information will be changed.UE monitors downlink control channel in RRC connection mode.Downlink control channel can be PDCCH or PCCH.

When UE has previously received system information, previously received system information has been regarded as effective system information by UE, until receive changing system information notification message.If do not receive changing system information notification message during Uplink Control Channel under surveillance, then UE is not decoded to the dynamic system information sent by physical down link sharing channel (PDSCH) and schedule system information.

Meanwhile, when UE operates in RRC idle pulley, BS can change notice by using beep-page message to carry out transmitting system information.Beep-page message can be sent by the Paging Control Channel (PCCH) in logic channel or the PDSCH in physical channel.When receiving beep-page message, the UE be in RRC idle pulley can know that system information will be changed.When receiving beep-page message, the UE be in RRC connection mode can know that system information will be changed.

UE receiving scheduling system information (step S220).When not detecting that changing system information notifies from downlink control channel, UE receiving scheduling system information.UE can obtain the schedule information about schedule system information message from the broadcast system information message sent by broadcast channel (BCH).Schedule system information message is sent by DL-SCH/PDSCH.Schedule system information message can be sent by fixing periodicity.That is, schedule system information message can be sent by the subframe be fixed in the radio frame comprising multiple subframe.Such as, radio frame can have the length of 10ms, that is, can comprise each 10 subframes with the length of 1ms.In this case, the 5th subframe can be used to send schedule system information.

Schedule system information message comprises renewal designator and the schedule information about at least one dynamic system information message.Schedule information about dynamic system information message is the periodic schedule information of other system information of instruction except schedule system information message.Such as, the time started of dynamic system information message can be indicated about the schedule information of dynamic system information message.UE can know to use and sends time point when upgrading system information about the schedule information of dynamic system information.Schedule system information message frequently is received than dynamic system information message.Upgrade designator instruction dynamic system information whether to change.Upgrade designator by using, UE can confirm to have shifted out cell coverage area until since UE reenters this cell coverage area from UE, and the system information previously obtained is effective.

Schedule system information message may further include one or more public land mobile network (PLMN) mark, and its each is the mark for the community providing radio to access, the tracing area code as the mark for the tracing area comprising community, cell ID, SIB map information etc. as the unique identification for community.

UE receives the dynamic system information message (step S230) upgraded.UE can by the dynamic system information using the schedule information about the dynamic system information obtained from schedule system information message to receive renewal.Dynamic system information is sent by DL-SCH/PDSCH.Dynamic system information message can be repeatedly sent during system information repetition interval.Dynamic system information message can have all kinds.Dissimilar dynamic system information message can have the identical or different cycle.That is, system information repetition interval can have the various cycle according to the type of dynamic system information message.

When changing system information, BS sends the dynamic system information upgraded after spending current system information repetition interval when next system information repetition interval.UE receives the dynamic system information message of renewal after having spent reception and having upgraded the system information repetition interval of designator.

Figure 18 shows according to an embodiment of the invention for the method for transmitting system information.

With reference to Figure 18, BS periodically transmitting system information.BS sends broadcast system information according to the corresponding cycle by BCH, and sends schedule system information and dynamic system information by PDSCH.Broadcast system information comprises the schedule information about schedule system information.Schedule system information comprises renewal designator, and the instruction of this renewal designator is about the renewal of the schedule information of dynamic system information or the renewal of dynamic system information.

When UE has previously received system information, UE has not been decoded to the schedule system information sent by PDSCH and dynamic system information.On the contrary, UE only monitors PDCCH.

When network is determined to change system information, BS changes notice, so that the change of report system information by PDCCH to UE transmitting system information.The renewal of BS by using the renewal designator be included in schedule system information to indicate dynamic system information.When receiving changing system information notice while monitoring PDCCH, UE receives the schedule system information sent by PDSCH.UE by the renewal using the renewal designator be included in schedule system information to confirm dynamic system information, and can know the time point of the dynamic system information that the schedule information for sending by using about dynamic system information upgrades.

When next system information repetition interval starts after having spent the current system information repetition interval for dynamic system information, BS sends the dynamic system information of renewal by PDSCH.UE receives the dynamic system information of renewal according to the schedule information about dynamic system information.

Figure 19 shows according to an embodiment of the invention for upgrading the method for system information.

Schedule system information and dynamic system information is sent by PDSCH with reference to Figure 19, BS.Among multiple pieces of system information, schedule system information is sent out in a repetitive fashion the most continually.That is, schedule system information frequently is launched than dynamic system information.One or more dynamic system information can be sent in system information repetition interval.In same system information repetition interval, send the dynamic system information comprising same system information parameter.Schedule system information can be used to send renewal designator, the renewal of this renewal designator indication mechanism information when current system information repetition interval.Send in the system information repetition interval upgrading designator wherein, send old system information, that is, the dynamic system information before renewal.The system information of renewal is sent, that is, the dynamic system information after renewal in next system information repetition interval.

After having spent the system repetition interval wherein receiving and upgrade designator, UE can upgrade system information by receiving the system information upgraded.

Above-mentioned often kind of function can be performed by processor, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC) etc., and processor is such as based on being encoded as the microprocessor etc. of software performing such function, program code.Based on description of the invention, planning, develop and realize such code can be apparent for a person skilled in the art.

Although disclose embodiments of the invention for illustration purposes, person of skill in the art will appreciate that, without departing from the scope of the invention, various amendment, interpolation and replacement are all possible.Therefore, embodiments of the invention are not limited to above-described embodiment, but are limited by the four corner of claims below together with its equivalent.

Claims (10)

1. upgraded a method for system information in a wireless communication system by user equipment (UE), described method comprises:
The first system information is received from base station BS at downlink sharied signal channel DL-SCH by described UE;
Described the first system information is applied until receive second system information by described UE;
Received from base station BS by described UE
Beep-page message, described beep-page message comprises changing system information notice, and the described BS of described changing system information notice instruction changes the first system information, and
Schedule system information message, described schedule system information message comprises the designator that the described BS of instruction has changed described the first system information,
Wherein, described beep-page message is received from described BS by paging control channel (PCCH), and
Wherein, described schedule system information message is received from described BS by described DL-SCH;
Designator according to described changing system information notice and renewal receives second system information by described UE from described BS on described DL-SCH; And
Described second system information is applied by described UE.
2. method according to claim 1, comprises further:
Receive primary system information, described primary system information comprises the schedule information of described schedule system information.
3. method according to claim 2, wherein, receives described primary system information by BCCH channel of broadcast control in logic channel.
4. method according to claim 1, wherein, receives described second system information immediately after the beginning of system information repetition period subsequently.
5. method according to claim 1, wherein, described subscriber equipment is in radio resource control RRC idle pulley or RRC connection mode.
6. the user equipment (UE) in wireless communication system, described user equipment (UE) comprises:
Radio frequency (RF) unit; And
Processor, is operatively coupled to described radio frequency unit, and is arranged to:
The first system information is received at downlink sharied signal channel DL-SCH from base station BS;
Apply described the first system information until receive second system information;
Receive from described base station BS,
Beep-page message, described beep-page message comprises changing system information notice, and the described BS of described changing system information notice instruction changes the first system information, and
Schedule system information message, described schedule system information message comprises the designator that the described BS of instruction has changed described the first system information,
Wherein, described beep-page message is received from described BS by paging control channel (PCCH), and
Wherein, described schedule system information message is received from described BS by described DL-SCH;
Designator according to described changing system information notice and renewal receives second system information from described BS on described DL-SCH; And
Apply described second system information.
7. subscriber equipment according to claim 6, wherein, described processor is configured to:
Receive primary system information, described primary system information comprises the schedule information of described schedule system information.
8. subscriber equipment according to claim 7, wherein, receives described primary system information by BCCH channel of broadcast control in logic channel.
9. subscriber equipment according to claim 7, wherein, receives described second system information immediately after the beginning of follow-up system information repetition period.
10. subscriber equipment according to claim 7, wherein, described subscriber equipment is radio resource control RRC idle pulley or RRC connection mode.
CN201210348190.7A 2007-09-18 2008-09-18 Method of acquiring system information in wireless communication system CN102917437B (en)

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US98239207P true 2007-10-24 2007-10-24
US60/982,392 2007-10-24
US98777507P true 2007-11-14 2007-11-14
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