WO2011017912A1 - 一种多播控制信道变更通知的接收方法及用户终端 - Google Patents

一种多播控制信道变更通知的接收方法及用户终端 Download PDF

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Publication number
WO2011017912A1
WO2011017912A1 PCT/CN2010/001233 CN2010001233W WO2011017912A1 WO 2011017912 A1 WO2011017912 A1 WO 2011017912A1 CN 2010001233 W CN2010001233 W CN 2010001233W WO 2011017912 A1 WO2011017912 A1 WO 2011017912A1
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WO
WIPO (PCT)
Prior art keywords
notification
mcch
mcch change
period
change notification
Prior art date
Application number
PCT/CN2010/001233
Other languages
English (en)
French (fr)
Inventor
高有军
胡臻平
杨宁
崔春风
Original Assignee
中国移动通信集团公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国移动通信集团公司 filed Critical 中国移动通信集团公司
Priority to RU2012108413/08A priority Critical patent/RU2552185C2/ru
Priority to EP10807857.7A priority patent/EP2466977B1/en
Priority to JP2012524083A priority patent/JP5686804B2/ja
Priority to KR1020127006667A priority patent/KR101358097B1/ko
Priority to US13/390,516 priority patent/US8948194B2/en
Publication of WO2011017912A1 publication Critical patent/WO2011017912A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02Arrangements for increasing efficiency of notification or paging channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/08Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for receiving a multicast control channel change notification and a user terminal. Background technique
  • the MCCH Multicast Control Channel
  • EMBMS Evolved Multimedia Broadcast and Multicast Service
  • the control information mainly includes eMBMS service information and radio bearer related information.
  • the eMBMS service information is used to indicate the eMBMS service that is available in the cell where the user terminal is located.
  • the eMBMS service information may include a service ID (service identifier), a session ID (session identifier), and a radio bearer.
  • radio bearer related information is radio bearer and point-to-multipoint bearer information used in a cell served by one or more eMBMS service descriptions.
  • radio bearer related information may include service ID, physical Channel information, transmission channel information, and wireless bearer information.
  • the network side indicates the location information of the MCCH in the BCCH (Broadcast Control Channel), and different user terminals correspond to different location information, so that the user terminal can read the information transmitted on the MCCH according to the indicated location, according to the MCCH. Carry the control information to obtain the corresponding service.
  • BCCH Broadcast Control Channel
  • the MCCH is defined with a Modification period and a Repetition period.
  • the Modification period is an integer multiple of the Repetition period.
  • the content transmitted by the MCCH is repeatedly sent in the Repetition period, and cannot be changed within a Modification period, that is, when the information carried by the MCCH changes.
  • the changed information can only be sent after the start of the next Modification period. Since the content transmitted by the MCCH in the same Modification Period is repeatedly sent in the Repetition period, Therefore, after reading the information transmitted on the MCCH in the same Modification Period, the UE will not continue to listen to the information on the MCCH.
  • the network side needs to notify the user terminal to obtain the new information that is changed on the MCCH in time, that is, the network side needs to be the user.
  • the terminal sends an MCCH change notification. After receiving the MCCH change notification, the user terminal listens to the MCCH to obtain new information after the change.
  • the network side sends an MCCH change notification to the user terminal by using the following two methods:
  • the MCCH change interface is carried in the paging (Paging) packet sent to the user terminal.
  • the user terminal in the eMBMS system includes a user terminal that receives the eMBMS service and a user terminal that only receives the unicast service, and both of the user terminals listen to the paging information according to the respective paging periods.
  • the network side sends a paging message including the MCCH change notification indication to the user terminal, and the paging message is sent on the corresponding PDCCH (Physical Downlink Control Channel).
  • PDCCH Physical Downlink Control Channel
  • the user After the P-RNTI is detected, the user receives the paging message, and then parses the paging message according to the P-RNTI, and learns the MCCH change notification, and reads the MCCH after the change according to the MCCH change notification. Information carried on.
  • a modification period corresponding period includes 32 notifications of MCCH changes. Paging cycle.
  • the paging packet including the MCCH change notification is also parsed, and the parsing result may be: These paging packets are not true paging packets, but only paging information including MCCH change notifications. Packets, user terminals that only receive unicast services do not need such paging packets, so this method will affect The performance of the user terminal that only receives the unicast service.
  • the MCCH change notification is carried by the PDCCH.
  • the network side sends a specific RNTI (Radio Network Temporary Identifier) through the PDCCH in the paging opportunity, for example, M-RNTI (Multimedia-Radio Network Temporary Identifier) Network temporary identifier).
  • M-RNTI Multimedia-Radio Network Temporary Identifier
  • the user terminal receiving the eMBMS service wakes up according to its own paging cycle to listen to a specific RNTI (such as M-RNTI) on the PDCCH. If the M-RNTI is detected on the PDCCH, it indicates that the information on the MCCH has changed, and the user terminal further listens to the MCCH to obtain new information.
  • the space of the PDCCH is limited.
  • the network side may need to send other network identifiers, such as RA-RNTI, SI-RNTI, and P-RNTI, which may cause information on the PDCCH.
  • RA-RNTI Radio Resource Identity
  • SI-RNTI SI-RNTI
  • P-RNTI Packet Radio Network Identifier
  • Overcrowding causes a specific RNTI to be handled incorrectly, causing the user terminal to fail to correctly detect a specific RNTI, thereby causing the user terminal to miss the MCCH modification content and fail to correctly receive the E-MBMS service.
  • the base station needs to repeatedly send a specific RNTI frequently, and the notification efficiency is low.
  • An embodiment of the present invention provides a method for receiving a multicast control channel change notification and a user terminal, so as to improve the efficiency of receiving a MCCH change notification by a user terminal, and reduce system performance due to excessive network identifier on the PDCCH or due to channel conditions.
  • the probability of failing to receive the MCCH change notification is correct; and the user terminal can be made to obtain the changed MCCH content in time.
  • the embodiment of the present invention further provides a method and a device for transmitting a multicast control channel change notification, so as to improve the transmission efficiency of the MCCH change notification, improve the reliability of transmitting the MCCH change notification on the PDCCH, and notify the user terminal to receive the Changed MCCH content.
  • An embodiment of the present invention provides a method for receiving a multicast control channel MCCH change notification, including:
  • the MCCH change notification is received at least N times according to the transmission timing of the MCCH change notification, and the N is the number of receptions of the MCCH change notification set in advance.
  • An embodiment of the present invention provides a user terminal, including:
  • a time acquisition unit configured to acquire a sending time of the MCCH change notification
  • the notification receiving unit is configured to receive the MCCH change notification at least N times according to the sending time of the MCCH change notification when the MCCH change notification is not received in an MCCH modification period, where the N is the preset MCCH The number of times the change notification was received.
  • Embodiments of the present invention provide a method for transmitting a multicast control channel MCCH change notification, including:
  • the base station acquires the sending time of the MCCH change notification
  • the MCCH change notification is transmitted to the user terminal at least N times according to the transmission time in one MCCH modification period, and the N is the number of transmissions of the MCCH change notification set in advance.
  • An embodiment of the present invention provides a sending apparatus for a multicast control channel MCCH change notification, which includes:
  • a time acquisition unit configured to acquire a sending time of the MCCH change notification
  • the notification sending unit is configured to: send, according to the sending time acquired by the time acquiring unit, the MCCH change notification to the user terminal at least N times in an MCCH modification period, where the N is the sending of the MCCH change notification set in advance frequency.
  • the present invention has at least the following advantages:
  • the base station and the user terminal acquire the same MCCH change notification transmission time, and the base station sends at least N MCCH change notifications to the user terminal according to the time in one MCCH modification period, and the user terminal does not have an MCCH modification period.
  • the MCCH change notification is received, the MCCH change notification is received at least N times according to the time, thereby improving the transmission and reception efficiency of the MCCH change notification, and reducing the probability that the terminal cannot correctly receive the notification due to poor channel conditions or other reasons;
  • the moment can avoid the paging opportunity of the user terminal, thereby reducing The probability of erroneously processing the MCCH change notification due to too many network identities on the PDCCH.
  • FIG. 1 is a schematic flowchart of a method for transmitting a multicast control channel change notification according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for receiving a multicast control channel change notification according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a user terminal acquiring an MCCH change notification according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a sending mechanism of the MCCH change notification corresponding to FIG. 3;
  • FIG. 5 is a schematic flowchart of a user terminal acquiring an MCCH change notification according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a sending mechanism of the MCCH change notification corresponding to FIG. 5;
  • FIG. 7 is a schematic flowchart of a user terminal acquiring an MCCH change notification according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a sending mechanism of the MCCH change notification corresponding to FIG. 7;
  • FIG. 9 is a schematic flowchart of a user terminal acquiring an MCCH change notification according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a sending mechanism of the MCCH change notification corresponding to FIG. 9;
  • FIG. 11 is a schematic structural diagram of a transmitting apparatus of a multicast control channel change notification according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a user terminal according to an embodiment of the present invention. detailed description
  • the base station and the user terminal agree on the manner of obtaining the transmission time of the MCCH change notification by using the PDCCH; the user terminal receives the at least N times MCCH change notification sent by the base station at the time, and further changes according to the MCCH.
  • the notification acquires new information carried on the MCCH.
  • the time when the base station sends the MCCH change notification through the PDCCH is the same for all the user terminals. Therefore, the base station only needs to send the MCCH change notification N times in the MCCH modification period, so that all the user terminals can obtain the MCCH change notification without having to
  • the MCCH change notification is sent on the paging opportunity of all the user terminals, and the transmission efficiency of the MCCH change notification is improved.
  • the transmission time of the MCCH change notification is obtained according to the agreed acquisition manner, and the paging opportunity of the user terminal can be avoided, thereby reducing the PDCCH.
  • the probability of excessive network identification and incorrect handling of MCCH change notifications is provided.
  • the base station may send a notification period (Notification Period) and a notification reception time offset (Notification Allocation Offset) of the MCCH change notification through the PDCCH, and send the specific subframe position of the notification to the user terminal, where the user terminal re
  • the sending time of the MCCH change notification is calculated according to the received notification period and the notification receiving time offset, where the notification period or the notification receiving time offset may be sent by the base station to the terminal, or may be directly determined according to the system or the specification.
  • the base station may also agree with the terminal to transmit the MCCH change notification in advance, and the subsequent base station sends the MCCH change notification according to the agreed transmission time, and the user terminal receives the MCCH change notification according to the agreed transmission time.
  • An embodiment of the present invention provides a method for transmitting a multicast control channel change notification. As shown in FIG. 1, the method includes the following steps:
  • Step 101 The base station acquires a sending moment of the MCCH change notification.
  • the base station may pre-schedule the transmission time of the MCCH change notification with the terminal.
  • the base station may directly send the MCCH change notification according to the agreed transmission time.
  • the base station may also notify the user terminal of the MCCH change notification notification period and the notification reception time offset.
  • a specified subframe position of the system frame for transmitting the MCCH change notification, and the user terminal acquires according to the foregoing content notified by the base station
  • the sending time of the MCCH change notification, where the subframe position may be a parameter sent by the base station to the UE, or a certain parameter that has been explicitly specified in the system, or obtained by a related method such as a calculation method specified by the system.
  • Step 102 The base station sends the MCCH change notification to the user terminal at least N times according to the sending time in an MCCH modification period, where the N is a preset number of times of sending the MCCH change notification.
  • An embodiment of the present invention provides a method for receiving a multicast control channel change notification. As shown in FIG. 2, the method includes the following steps:
  • Step 201 Acquire a sending moment of the MCCH change notification.
  • the user terminal may pre-schedule the transmission time of the MCCH change notification with the base station, and the user terminal may directly send the MCCH change notification according to the agreed transmission time; the user terminal may also first receive the notification period of the MCCH change notification notified by the base station, and notify the reception.
  • Step 202 When the MCCH change notification is not received within one MCCH modification period, the MCCH change notification is received at least N times according to the sending time of the MCCH change notification.
  • the specific value of N is preset according to actual needs, and may be, for example, but not limited to, setting the value of N based on the following manner:
  • N the shortest MCCH modification period / the repetition period of the MCCH change notification, wherein the repetition period of the MCCH change notification is the shortest time interval in which the MCCH change notification is repeatedly transmitted within one MCCH modification period, and the shortest MCCH tampering period is to cover the base station / The transmission period of the shortest MCCH corresponding to the plurality of MBSFN areas of the cell.
  • the base station notifies the user terminal that the notification period can be actually needed.
  • the notification receiving time offset can be flexibly set according to actual needs, such as 0, 1 or 2, etc.
  • the base station may also notify the user terminal to notify the sending window.
  • Notification Transmission Window or Notification Reception Window, notifies the sending window as a series of consecutive sub-frames, such as MBSFN
  • the mode calculation obtains the transmission time of the MCCH change notification in the notification period, and the base station and the user terminal respectively transmit and receive the MCCH change notification at the time.
  • the size of the notification sending window is K, and the specific value of K is the number of subframes in the notification sending window or the number of MBSFN subframes.
  • the value of K is less than or equal to N and greater than or equal to 1.
  • the subframe position that the system specifies to send the MCCH change notification may be a parameter that is sent by the base station to the UE, or a parameter that the base station and the terminal that have been explicitly specified in the system can understand according to the system specification, or are specified by the system. Calculation methods and other related methods are obtained.
  • the manner of obtaining the notification transmission time provided in the embodiment of the present invention needs to be changed according to the relationship between the notification period and the system frame number (SFN, System Frame Number) of the user terminal.
  • SFN is a value of 0 to 1023, which represents 10 to 10240 ms, that is, the maximum system frame number (Max SFN) is 10.24 seconds, that is, the length of the SFN cycle, and the notification period may be larger than the SFN cycle, and may be more than the SFN cycle. Small, or the notification period is equal to the SFN cycle.
  • Step 301 The base station notifies the user terminal that the notification period of the MCCH change notification, the notification reception time offset, and the notification transmission window are sent by the PDCCH, and the acquisition manner of the transmission time of the MCCH change notification is agreed with the user terminal.
  • the notification period is less than or equal to Max SFN; the acquisition time of the MCCH change notification is obtained as follows:
  • SFN mod NotificationPeriod NotificationAllocationOffset; (1) where SFN is the current system frame number, NotificationPeriod is the notification period, and NotificationAllocationOffset is the notification reception time offset. The default value is 0.
  • the specified subframe position in the SFN that satisfies the above formula is the time at which the base station transmits the MCCH change notification.
  • Step 302 The base station calculates a transmission time of the MCCH change notification, and transmits an MCCH change notification to the user terminal through the PDCCH at the time, and repeats the MCCH change notification to the user terminal by using the subframe in the notification window from the time.
  • the base station performs calculation according to the above formula (1), acquires a time that satisfies the formula (1), and a corresponding SFN, at which time the MCCH change notification is sent by the PDCCH, and all subframes in the notification transmission window are repeated to the user terminal.
  • the base station transmits at least N MCCH change notifications to the user terminal through the notification sending window according to the calculated transmission time of the transmitted MCCH change notification.
  • the sending time is specifically a specified subframe position of the system frame, and the specific value of the size K of the notification sending window is the number of subframes in the notification sending window or the number of MBSFN subframes, and the value of the K is less than or equal to N, and is greater than Equal to 1.
  • Step 303 The user terminal calculates a time when the base station sends the MCCH change notification according to the formula (1), and monitors the PDCCH and the subframe in the notification transmission window from the time, and acquires the MCCH change notification sent by the base station.
  • the user terminal After the user terminal correctly receives the MCCH change notification sent by the base station, the user terminal does not listen to other subframes in the notification sending window.
  • the process of obtaining the MCCH change notification by the user terminal in the second manner is as shown in FIG. 5 and FIG. 6, and includes the following steps:
  • Step 501 The base station notifies the user terminal that the MCCH change notification is sent by using the PDCCH. The period, the notification reception time offset, and the acquisition manner of the transmission time of the MCCH change notification with the user terminal.
  • the sending time of the MCCH change notification is obtained in the same manner as in step 201:
  • SFN mod NotificationPeriod NotificationAllocationOffset; (1) where SFN is the current system frame number, NotificationPeriod is the notification period, and NotificationAllocationOffset is the notification reception time offset. The default value is 0.
  • Step 502 The base station sends an MCCH change notification to the user terminal by calculating a transmission time of the MCCH change notification, and transmitting a notification time before the MCCH modification boundary in the notification period.
  • next MCCH modification boundary refers to the boundary between the current MCCH modification period and the next MCCH modification period.
  • the base station sends an MCCH change notification to the user terminal every notification period.
  • the base station sends at least N MCCH change notifications to the user terminal according to the calculated transmission time of the MCCH change notification, and the specific value of N is less than or equal to the number of notification transmission times before the next MCCH modification boundary.
  • Step 503 The user terminal calculates, according to the formula (1), a time when the base station sends the MCCH change notification, and monitors the PDCCH at the time to acquire the MCCH change notification sent by the base station.
  • the base station may send the MCCH change notification to the user terminal at the time of sending the multiple MCCH change notifications before the next MCCH modification boundary.
  • the user terminal after the user terminal correctly receives the MCCH change notification sent by the base station, it does not receive other MCCH change notifications sent by the base station before the next MCCH modification boundary.
  • the base station sends the counter n or the counter m to the user terminal through the MCCH to help the terminal correctly find the time when the MCCH change notification is sent.
  • the parameter n and the parameter m correspond to two. The manner in which the user terminal obtains the MCCH change notification is described below:
  • n is the current SFN expansion multiple, which is a positive integer greater than or equal to 0, and the value is as follows: n_j 2 Among them, n ⁇ NotiflcationPeriod 1 MaxSFN is called the maximum SFN expansion factor, indicating Notification and MaxSFN modulo.
  • Step 701 The base station notifies the user terminal to send a notification period of the MCCH change notification, notify the receiving time offset, and the notification sending window by using the PDCCH, and agree with the user terminal. How to obtain the sending time of the MCCH change notification.
  • the acquisition time of the MCCH change notification is obtained as follows:
  • NotificationAllocationOf set ( 2 )
  • n is the current SFN expansion multiple
  • n is incremented by 1 every SFN period
  • NotificationPeriod is the notification period
  • NotificationAllocationOffset is the notification reception time offset
  • Step 702 The base station calculates a transmission time of the MCCH change notification, and determines a system frame time of the SFN period that satisfies the SFN expansion multiple of the equation (2) as a transmission time of the MCCH change notification, and passes the PDCCH and the notification window at each transmission time.
  • the inner subframe transmits an MCCH change notification to the user terminal.
  • the base station transmits at least N MCCH change notifications to the user terminal according to the calculated transmission time of the transmission MCCH change notification.
  • the sending time is specifically a specified subframe position of the system frame, and the specific value of the size K of the notification sending window is the number of subframes in the notification sending window or the number of MBSFN subframes, and the value of K is less than or equal to N, and is greater than or equal to 1 .
  • the base station performs calculation according to the above formula (2), and there are multiple times that satisfy the formula (2), and the base station sends an MCCH change notification to the user terminal through the PDCCH at each time when the formula (2) is satisfied, and from the moment
  • the MCCH change notification is repeatedly transmitted by each subframe or every MBSFN subframe in the notification transmission window.
  • Step 703 The user terminal calculates, according to the formula (2), a time when the base station sends the MCCH change notification, monitors the PDCCH at the time, and notifies the subframe in the transmission window, and acquires the MCCH sent by the base station. Change Notification.
  • the user terminal After the user terminal acquires the time when the base station sends the MCCH change notification, the value is automatically updated every time the SFN cycle is passed, and the notification transmission information is monitored until the time when the formula (2) is satisfied. As in step 203, after the user terminal correctly receives the MCCH change notification sent by the base station once, it does not listen to other subframes in the notification transmission window.
  • m is an MCCH repetition period counter (McchRpCount). As shown in FIG. 9 and FIG. 10, m is transmitted in each MCCH repetition period through the MCCH channel, and each time the mCH is transmitted in each MCCH modification period. Increase by step size 1.
  • the specific process for the user terminal to obtain the MCCH change notification is as shown in FIG. 9, and includes the following steps:
  • Step 901 The base station notifies the user terminal that the notification period of the MCCH change notification is sent by the PDCCH, the notification time offset is notified, and the acquisition mode of the MCCH change notification transmission time is agreed with the user terminal.
  • the acquisition time of the MCCH change notification is obtained as follows:
  • Step 902 The base station determines, by calculating the transmission time of the MCCH change notification, the system frame time in the mth MCCH repetition period that satisfies the formula (3) as the transmission time of the MCCH change notification, and passes the PDCCH and the notification window at each transmission time.
  • the inner subframe transmits an MCCH change notification to the user terminal.
  • the base station sends at least N MCCH change notifications to the user terminal according to the calculated transmission time of the MCCH change notification, and the specific value of N is less than or equal to the number of notification transmission times before the next MCCH modification boundary.
  • Step 903 The user terminal calculates the time when the base station sends the MCCH change notification according to the formula (3), monitors the PDCCH at the time, acquires the MCCH change notification sent by the base station, and does not monitor the PDCCH after correctly receiving the MCCH change notification sent by the base station. .
  • the base station and the user terminal acquire the same MCCH change Knowing the transmission time, and the base station sends at least N MCCH change notifications to the user terminal according to the time in an MCCH modification period, and the user terminal receives the MCCH change notification according to the time when the MCCH change notification is not received within one MCCH modification period.
  • At least N times of MCCH change notification thereby improving the transmission and reception efficiency of the MCCH change notification, reducing the probability that the terminal cannot correctly receive the notification due to poor channel conditions or other reasons; moreover, the pager of the user terminal can be avoided at the moment Therefore, the probability of erroneously processing the MCCH change notification due to too many network identifiers on the PDCCH is reduced.
  • An embodiment of the present invention provides a sending apparatus for a multicast control channel MCCH change notification. As shown in FIG. 11, the method includes:
  • the time obtaining unit 11 is configured to acquire a sending moment of the MCCH change notification
  • the notification sending unit 12 is configured to send the MCCH change notification to the user terminal at least N times according to the sending time acquired by the time acquiring unit in an MCCH modification period, where the N is the preset MCCH change notification The number of transmissions.
  • the time acquiring unit 11 is specifically configured to: acquire a notification period of the MCCH change notification and notify the receiving time offset;
  • the transmission time of the MCCH change notification is obtained according to the system frame number SFN and the acquired notification period and the notification reception time offset.
  • the time acquiring unit 11 performs a modulo operation on the SFN and the notification period, and if the result is equal to the notification receiving time offset, the system is The specified subframe position of the frame is used as the transmission time of the MCCH change notification.
  • the notification sending unit 12 is specifically configured to: acquire one or more preset notification sending windows, and start a subframe or a multicast/broadcast single frequency in the notification sending window from a specified subframe position of the system frame.
  • the network MBSFN subframe transmits the MCCH change notification at least N times, the pass
  • the specific value of the size K of the transmission window is the number of subframes or the number of MBSFN subframes in the notification transmission window, and the value of the K is less than or equal to N and greater than or equal to 1.
  • the start time of the m MCCH repetition periods is the transmission timing of the MCCH change notification, where m is the MCCH repetition period counter.
  • the notification sending unit 12 is further configured to: send the MCCH change notification by using a PDCCH, where the specific value of the N is less than or equal to the next MCCH modification, at a sending moment of the at least N MCCH change notifications before the next MCCH modification boundary The number of transmission times of the MCCH change notification before the boundary.
  • N the shortest MCCH modification period / the repetition period of the MCCH change notification, wherein the repetition period of the MCCH change notification is the shortest time interval in which the MCCH change notification is repeatedly transmitted within one MCCH modification period, and the shortest MCCH modification period is to cover the base station / The transmission period of the shortest MCCH corresponding to the plurality of MBSFN areas of the cell.
  • An embodiment of the present invention provides a user terminal, as shown in FIG. 12, including:
  • a time obtaining unit 21 configured to acquire a sending moment of the MCCH change notification
  • the notification receiving unit 22 is configured to receive the MCCH change notification at least N times according to the sending time of the MCCH change notification when the MCCH change notification is not received in one MCCH modification period, where the N is the preset The number of times the MCCH change notification was received.
  • the time obtaining unit 21 is specifically configured to:
  • the transmission time of the MCCH change notification is obtained according to the system frame number SFN and the acquired notification period and the notification reception time offset.
  • the time acquiring unit 21 performs a modulo operation on the SFN and the notification period, and when the result is equal to the notification receiving time offset, the system is The designated subframe position of the frame is used as the transmission time of the MCCH change notification;
  • the designated subframe position of the system frame of the SFN period in which the SFN is expanded by n is used as the transmission timing of the MCCH change notification.
  • the notification receiving unit 22 is specifically configured to: acquire at least one preset notification sending window, and listen to a subframe or a multicast/broadcast single frequency network in the notification sending window from a specified subframe position of the system frame. Obtaining, by the MBSFN subframe, an MCCH change notification sent by the base station; and receiving the MCCH change notification by using the notification sending window at least N times when the MCCH change notification is not received within one MCCH modification period, the notification sending window.
  • the specific value of the size K is the number of subframes or the number of MBSFN subframes in the notification transmission window, and the value of the K is less than or equal to N and greater than or equal to 1.
  • the notification receiving unit 22 is further configured to: stop receiving the specific RNTI or the M-RNTL in the PDCCH in the subframe or the MBSFN subframe in the notification sending window after the MCCH change notification is correctly received.
  • the start time of the m MCCH repetition periods is the transmission timing of the MCCH change notification, where m is the MCCH repetition period counter.
  • the notification receiving unit 22 is further configured to: listen to the PDCCH at a sending moment of the at least N MCCH change notifications before the next MCCH modification boundary, and try to receive the MCCH change notification.
  • the notification receiving unit 22 is further configured to: after receiving the MCCH change notification once, stop detecting whether a specific RNTI or M-RNTL exists in the PDCCH at another notification sending time before the next MCCH modification boundary
  • N shortest MCCH modification period / repetition period of MCCH change notification.
  • the repetition period of the MCCH change notification is repeated within one MCCH modification period.
  • the shortest time interval for receiving the MCCH change notification, the shortest MCCH modification period is the transmission period of the shortest MCCH corresponding to the plurality of MBSFN areas covering the base station/cell.
  • the base station and the user terminal acquire the same MCCH change notification sending time, and the base station sends at least N MCCH change notifications to the user terminal according to the time in one MCCH modification period, the user terminal
  • the MCCH change notification is not received within one MCCH modification period
  • the MCCH change notification is received at least N times according to the time, thereby improving the transmission and reception efficiency of the MCCH change notification, and reducing the terminal failure due to poor channel conditions or other reasons.
  • the probability of correctly receiving the notification Moreover, the moment can avoid the paging opportunity of the user terminal, thereby reducing the probability of erroneously processing the MCCH change notification due to too many network identifiers on the PDCCH.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the computer software product of the present invention is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform various implementations of the present invention. The method described in the example.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

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Description

一种多播控制信道变更通知的接收方法及用户终端 技术领域
本发明涉及通讯领域, 尤其涉及一种多播控制信道变更通知的接收方法 及用户终端。 背景技术
MCCH ( Multicast Control Channel, 多播控制信道 )是 eMBMS ( Evolved Multimedia Broadcast and Multicast Service, 演进型多媒体广播和多播业务)系 统中一种点到多点的下行信道, 用于传送网络侧到 UE ( User Equipment, 用 户终端) 的控制信息, 该控制信息主要包括 eMBMS 业务信息和无线承载相 关信息。 其中, eMBMS 业务信息用于指示用户终端所在小区中可获得的 eMBMS业务, 对于每种 eMBMS业务, eMBMS业务信息中可以包括业务 ID (业务标识)、 会话 ID (会话标识)、 以及无线承载幹放指示等信息; 无线承 载相关信息为一种或多种 eMBMS 业务描述所服务的小区中使用的无线承载 和点到多点承载信息, 对于每种 eMBMS 业务, 无线承载相关信息可以包括 业务 ID、 物理信道信息、 传输信道信息、 以及无线承栽信息等。
网络侧在 BCCH( Broadcast Control Channel,广播控制信道)中指示 MCCH 的位置信息, 不同的用户终端对应不同的位置信息, 从而使得用户终端能按 照指示的位置读取 MCCH上传送的信息,根据 MCCH中携带的控制信息获取 相应的业务。
MCCH定义有 Modification period (修改周期)和 Repetition period (重复 周期)。 Modification period是 Repetition period的整数倍, 在每一 Modification period 内, MCCH 传送的内容以 Repetition period 重复发送, 并且在一个 Modification period内是不能变化的, 也就是说: 当 MCCH携带的信息发生变 化时, 只能在下一个 Modification period开始后才可以发送变化后的信息。 由 于同一 Modification period内 MCCH传送的内容以 Repetition period重复发送, 因此, 同一 Modification period内 UE在读取 MCCH上传送的信息后, 将不再 继续侦听 MCCH上的信息。
当 MCCH携带的信息发生变化时, 例如: eMBMS的业务发生改变、 或 者无线承载信息等发生变化, 网络侧需要通知用户终端及时获取 MCCH上携 带的发生变化后的新信息, 即网络侧需要向用户终端发送 MCCH变更通知, 用户终端在接收到 MCCH变更通知之后,会去侦听 MCCH获取发生变化后的 新信息。
现有技术中,网络侧通过以下两种方法向用户终端发送 MCCH变更通知: 现有技术一中: 在发送给用户终端的 paging (寻呼)信息包中携带 MCCH 变更通 ^口。
具体的, 现有技术中, eMBMS系统中的用户终端包括接收 eMBMS业务 的用户终端和只接收单播业务的用户终端, 这两种用户终端都按照各自的寻 呼周期侦听 paging信息。 当 MCCH上携带的信息发生变更时, 网络侧向用户 终端发送一个包含 MCCH变更通知指示的寻呼消息,相应的 PDCCH( Physical Downlink Control Channel,物理下行控制信道)上会发送与该寻呼消息所对应 的 P- RNTI, 用户检测到 P-RNTI后, 就会接收寻呼消息、 并才艮据该 P-RNTI 解析寻呼消息,获知 MCCH变更通知,根据该 MCCH变更通知读取变更之后 的 MCCH上携带的信息。
例如: 假设 MCCH的 Modification period为 10240毫秒( ms ), 某终端的 寻呼周期为 320毫秒, 即终端以 320毫秒为周期去接收 paging信息, 因此一 个 Modification period对应时段包含了 32个可以通知 MCCH变化的寻呼周期。
但是,由于 MCCH变更通知是针对 eMBMS系统中所有用户终端发送的 , 即网络侧不区分接收 eMBMS业务的用户终端和只接收单播业务的用户终端, 因此, 只接收单播业务的用户终端, 在检测到 P-RNTI后, 也将对包含 MCCH 变更通知的 paging信息包进行解析, 而解析的结果可能是: 这些 paging信息 包并不是真正的寻呼包, 而仅是包含 MCCH变更通知的 paging信息包, 只接 收单播业务的用户终端并不需要这种 paging信息包, 因此, 这一方法会影响 只接收单播业务的用户终端的性能。
现有技术二中: 通过 PDCCH携带 MCCH变更通知。
当 MCCH携带的信息发生变化时, 网络侧会在寻呼机会中,通过 PDCCH 发送一个特定 RNTI ( Radio Network Temporary Identifier, 无线网络临时标识 符 ), 例如 M-RNTI ( Multimedia-Radio Network Temporary Identifier, 多媒体 无线网络临时标识符)。 接收 eMBMS业务的用户终端按照自己的寻呼周期醒 过来侦听 PDCCH上的特定 RNTI (如 M-RNTI )。 如果检测到 PDCCH上携带 了 M-RNTI, 则表示 MCCH 上的信息发生了改变, 用户终端会进一步侦听 MCCH获取新的信息。
但是, PDCCH的空间有限, 当网络侧在用户终端的寻呼机会向用户终端 发送特定 RNTI 时, 同时需要发送其他网络标识, 例如 RA-RNTI、 SI-RNTI 以及 P-RNTI时, 可能导致 PDCCH上信息过于拥挤导致特定 RNTI被错误处 理, 导致用户终端无法正确检测到特定 RNTI, 从而致使用户终端错过 MCCH 修改内容, 不能正确接收到 E-MBMS业务。 同时, 由于不同用户终端的寻呼 机会不同, 因此, 基站需要频繁重复发送特定 RNTI, 通知效率低。 发明内容
本发明的实施例提供了一种多播控制信道变更通知的接收方法和用户终 端, 以提高用户终端接收 MCCH变更通知的效率, 降低由于 PDCCH上网络 标识过多而影响系统性能或者因为信道条件导致不能正确接收 MCCH变更通 知的几率; 并且可以使得用户终端能够及时获取到更改后的 MCCH内容。
本发明的实施例还提供一种多播控制信道变更通知的发送方法和装置, 以提高 MCCH变更通知的发送效率,提高 PDCCH上发送 MCCH变更通知的 可靠性; 并且可以及时通知用户终端去接收已经更改了的 MCCH内容。
本发明的实施例提供一种多播控制信道 MCCH变更通知的接收方法, 包 括:
获取 MCCH变更通知的发送时刻; 并 在一个 MCCH修改周期内没有接收到 MCCH 变更通知时, 根据所述 MCCH变更通知的发送时刻, 至少 N次接收所述 MCCH变更通知, 所述 N 为预先设置的所述 MCCH变更通知的接收次数。
本发明的实施例提供一种用户终端, 包括:
时刻获取单元, 用于获取 MCCH变更通知的发送时刻;
通知接收单元,用于在一个 MCCH修改周期内没有接收到 MCCH变更通 知时, 根据所述 MCCH变更通知的发送时刻, 至少 N次接收所述 MCCH变 更通知, 所述 N为预先设置的所述 MCCH变更通知的接收次数。
本发明的实施例提供一种多播控制信道 MCCH变更通知的发送方法, 包 括:
基站获取 MCCH变更通知的发送时刻; 并
在一个 MCCH修改周期内,根据所述发送时刻向用户终端发送至少 N次 所述 MCCH变更通知, 所述 N为预先设置的所述 MCCH变更通知的发送次 数。
本发明的实施例提供一种多播控制信道 MCCH变更通知的发送装置, 包 括:
时刻获取单元, 用于获取 MCCH变更通知的发送时刻;
通知发送单元, 用于在一个 MCCH修改周期内, 根据所述时刻获取单元 获取的发送时刻向用户终端发送至少 N次所述 MCCH变更通知,所述 N为预 先设置的所述 MCCH变更通知的发送次数。
与现有技术相比, 本发明至少具有以下优点:
本发明中, 基站与用户终端获取相同的 MCCH变更通知的发送时刻, 且 基站在一个 MCCH修改周期内,根据该时刻向用户终端发送至少 N次 MCCH 变更通知,用户终端在一个 MCCH修改周期内没有接收到 MCCH变更通知时, 根据该时刻接收至少 N次 MCCH变更通知, 从而提高了 MCCH变更通知的 发送和接收效率, 降低了了因为信道条件差或者其他原因导致终端不能正确 接收该通知的概率; 而且, 该时刻可以避开用户终端的寻呼机会, 从而降低 了由于 PDCCH上网络标识过多而错误处理 MCCH变更通知的几率。 附图说明
图 1 是本发明的实施例提供的多播控制信道变更通知的发送方法的流程 示意图;
图 2是本发明的实施例提供的多播控制信道变更通知的接收方法的流程 示意图;
图 3是本发明的实施例提供的用户终端获取 MCCH变更通知的流程示意 图;
图 4是图 3所对应的 MCCH变更通知的发送机制示意图;
图 5是本发明的实施例提供的用户终端获取 MCCH变更通知的流程示意 图;
图 6是图 5所对应的 MCCH变更通知的发送机制示意图;
图 7是本发明的实施例提供的用户终端获取 MCCH变更通知的流程示意 图;
图 8是图 7所对应的 MCCH变更通知的发送机制示意图;
图 9是本发明的实施例提供的用户终端获取 MCCH变更通知的流程示意 图;
图 10是图 9所对应的 MCCH变更通知的发送机制示意图;
图 11是本发明的实施例提供的多播控制信道变更通知的发送装置的结构 示意图;
图 12是本发明的实施例提供的用户终端的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而 不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作 出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。 本发明实施例的核心思想在于: 基站与用户终端约定通过 PDCCH发送 MCCH变更通知的发送时刻的获取方式; 用户终端在该时刻接收基站发送的、 至少 N次 MCCH变更通知, 进而根据该 MCCH的变更通知获取 MCCH上携 带的新信息。 由于基站通过 PDCCH发送 MCCH变更通知的时刻对所有用户 终端都相同, 因此, 基站在 MCCH修改周期内只需要发送 N次 MCCH变更 通知, 就可以使所有用户终端获取到 MCCH的变更通知, 而不必在所有用户 终端的寻呼机会上发送 MCCH变更通知,提高了 MCCH变更通知的发送效率; 而且, 根据约定的获取方式获取 MCCH变更通知的发送时刻, 可以避开用户 终端的寻呼机会,从而降低了由于 PDCCH上网络标识过多而错误处理 MCCH 变更通知的几率。
本发明实施例中, 基站可以通过 PDCCH将发送 MCCH变更通知的通知 周期 (Notification Period ) 和通知接收时刻偏移量 (Notification Allocation Offset ), 发送通知的具体子帧位置发送给用户终端, 用户终端再根据接收到 的通知周期和通知接收时刻偏移量来计算 MCCH变更通知的发送时刻, 其中 通知周期或者通知接收时刻偏移量, 可以是基站发送给终端, 也可以是根据 系统或者规范中直接确定或者其他 i统中规定的参数计算得到; 此外, 基站 也可以预先和终端约定 MCCH变更通知的发送时刻, 后续基站按照约定的发 送时刻发送 MCCH变更通知,用户终端按照约定的发送时刻接收 MCCH变更 通知 0
本发明的实施例提供一种多播控制信道变更通知的发送方法, 如图 1 所 示, 包括以下步骤:
步驟 101 , 基站获取所述 MCCH变更通知的发送时刻;
基站可以预先和终端约定 MCCH变更通知的发送时刻, 此时基站可以直 接按照约定的发送时刻发送 MCCH变更通知即可; 基站也可以先通知用户终 端 MCCH变更通知的通知周期、通知接收时刻偏移量以及发送 MCCH变更通 知的系统帧的指定子帧位置, 用户终端根据基站通知的上述内容来获取 MCCH变更通知的发送时刻, 其中该子帧位置可以是由基站下发给 UE的参 数、 或者系统中已经明确规定的某个参数, 或者由系统规定的计算方法等相 关方式获得。
步骤 102, 所述基站在一个 MCCH修改周期内, 根据所述发送时刻向用 户终端发送至少 N次所述 MCCH变更通知,所述 N为预先设置的所述 MCCH 变更通知的发送次数。
本发明的实施例提供一种多播控制信道变更通知的接收方法, 如图 2 所 示, 包括以下步骤:
步骤 201 , 获取所述 MCCH变更通知的发送时刻;
用户终端可以预先和基站约定 MCCH变更通知的发送时刻, 此时用户终 端可以直接按照约定的发送时刻发送 MCCH变更通知即可; 用户终端也可以 先接收基站通知的 MCCH变更通知的通知周期、 通知接收时刻偏移量以及发 送 MCCH变更通知的系统帧的指定子帧位置, 然后再根据基站通知的上述内 容来获取 MCCH变更通知的发送时刻, 其中该子帧位置可以是由基站下发给 用户终端的参数、 或者系统中已经明确规定的某个参数, 或者由系统规定的 计算方法等相关方式获得。
步骤 202, 在一个 MCCH修改周期内没有接收到 MCCH变更通知时, 根 据所述 MCCH变更通知的发送时刻, 至少 N次接收所述 MCCH变更通知。
本发明的实施例中, N 的具体值根据实际需要预先设置, 例如可以但不 限于基于下述方式设置 N的值:
N=最短的 MCCH修改周期 / MCCH变更通知的重复周期 其中, MCCH变更通知的重复周期为在一个 MCCH修改周期内, 重复发 送 MCCH变更通知的最短时间间隔, 最短的 MCCH 爹改周期是覆盖该基站 / 小区的多个 MBSFN区域中对应的最短的 MCCH的发送周期。
下面结合具体实施例详细介绍本发明提供的多播控制信道变更通知的发 送和接收方法。
其中, 本发明的实施例中基站通知用户终端的通知周期可以 居实际需 要灵活设置, 特别的, 当系统中已经明确规定 MCCH变更通知的通知周期等 于系统的寻呼周期, 或者等于 MCCH的修改周期, 或者等于其他系统已经规 定的周期, 或者这些周期的倍数时, 则用户终端与基站根据系统的规定获知 MCCH的变更通知的通知周期, 因此, MCCH的变更通知的通知周期这个参 数不必通知给用户终端。 通知接收时刻偏移量可以根据实际需要灵活设置, 例如 0、 1或者 2等, 当系统没有设置通知接收时刻偏移量时, 系统对该参数 的默认值为 0。 本应用场景中基站还可以通知用户终端通知发送窗口
( Notification Transmission Window ), 或者称为通知接收窗口 (Notification Reception Window ) , 通知发送窗口为一系列连续的子帧, 例如 MBSFN
( Multicast/Broadcast over Single Frequency Network, 多播 /广播单频网络)子 帧, 基站和用户终端分别通过该通知发送窗口内的子帧发送和接收 MCCH变 更通知; 且基站和用户终端根据约定的获取方式计算获得通知周期内 MCCH 变更通知的发送时刻, 基站和用户终端分别在该时刻发送和接收 MCCH变更 通知。 通知发送窗口的大小为 K, K 的具体值为通知发送窗口内的子帧个数 或者 MBSFN子帧个数, K的值小于等于 N, 且大于等于 1。
同时, 系统指定的发送 MCCH变更通知的子帧位置可以是由基站下发给 UE的参数、 或者系统中已经明确规定的基站和终端能够按照系统规范理解一 致的某个参数, 或者由系统规定的计算方法等相关方式获得。
本发明的实施例中提供的通知发送时刻的获取方式需要根据通知周期与 用户终端的系统帧编号 ( SFN, System Frame Number )周期 ( Cycle ) 大小关 系发生变化。 其中, SFN是 0至 1023的取值, 代表 10至 10240ms, 即最大 系统帧编号 (Max SFN ) 为 10.24秒, 也就是 SFN cycle的长度, 通知周期有 可能比 SFN cycle大, 也有可能比 SFN cycle小, 或者通知周期与 SFN cycle 相等。
下面首先介绍通知周期小于或者等于 Max SFN、 即 SFN cycle的情况。 此时, 用户终端又可以通过两种方式获取 MCCH变更通知, 下面首先介 绍第一种方式, 具体如图 3和图 4所示, 包括以下步骤: 步骤 301 , 基站通知用户终端通过 PDCCH发送 MCCH变更通知的通知 周期、 通知接收时刻偏移量以及通知发送窗口, 并与用户终端约定 MCCH变 更通知的发送时刻的获取方式。
其中, 通知周期小于或者等于 Max SFN; MCCH变更通知的发送时刻的 获取方式为:
SFN mod NotificationPeriod = NotificationAllocationOffset; ( 1 ) 其中 SFN 为 当前系统帧编号, NotificationPeriod 为通知周期, NotificationAllocationOffset为通知接收时刻偏移量, 其默认值为 0。
满足上式的 SFN中指定子帧位置即为基站发送 MCCH变更通知的时刻。 步骤 302, 基站通过计算 MCCH 变更通知的发送时刻, 在该时刻通过 PDCCH向用户终端发送 MCCH变更通知, 并从该时刻起通过通知窗口内的 子帧向用户终端重复发送 MCCH变更通知。
具体的, 基站根据上式 (1 )进行计算, 获取满足式 ( 1 ) 的时刻以及对 应的 SFN, 在该时刻通过 PDCCH发送 MCCH变更通知, 并通过通知发送窗 口内的所有子帧向用户终端重复发送 MCCH变更通知。在一个 MCCH修改周 期内, 基站根据计算获得的发送 MCCH变更通知的发送时刻通过通知发送窗 口向用户终端发送至少 N次 MCCH变更通知。该发送时刻具体为系统帧的指 定子帧位置, 通知发送窗口的大小 K的具体值为通知发送窗口内的子帧个数 或者 MBSFN子帧个数, 所述 K的值小于等于 N, 且大于等于 1。
步骤 303, 用户终端根据式(1 )计算基站发送 MCCH变更通知的时刻, 从该时刻起监听 PDCCH和通知发送窗口内的子帧, 获取基站发送的 MCCH 变更通知。
具体的, 用户终端正确接收一次基站发送的 MCCH变更通知后, 用户终 端不再监听通知发送窗口内的其他子帧。
用户终端通过第二种方式获取 MCCH变更通知的过程如图 5和图 6所示, 包括以下步骤:
步骤 501 , 基站通知用户终端通过 PDCCH发送 MCCH变更通知的通知 周期、 通知接收时刻偏移量, 并与用户终端约定 MCCH变更通知的发送时刻 的获取方式。
具体的, MCCH变更通知的发送时刻的获取方式与步骤 201中相同:
SFN mod NotificationPeriod = NotificationAllocationOffset; ( 1 ) 其中 SFN 为 当前系统帧编号, NotificationPeriod 为通知周期, NotificationAllocationOffset为通知接收时刻偏移量, 其默认值为 0。
步骤 502, 基站通过计算 MCCH变更通知的发送时刻, 在通知周期内的 MCCH修改边界之前的通知发送时刻向用户终端发送 MCCH变更通知。
具体的,下一 MCCH修改边界指的是当前 MCCH修改周期与下一 MCCH 修改周期的交界。 基站在每一通知周期内向用户终端发送一次 MCCH变更通 知。在一个 MCCH修改周期内,基站根据计算获得的发送 MCCH变更通知的 发送时刻向用户终端发送至少 N次 MCCH变更通知, N的具体值小于等于下 一 MCCH修改边界之前的通知发送时刻的个数。
步骤 503 , 用户终端根据式(1 )计算基站发送 MCCH变更通知的时刻, 在该时刻监听 PDCCH, 获取基站发送的 MCCH变更通知。
具体的, 当通知周期小于 Max SFN时,有可能在下一 MCCH修改边界之 前,基站在多个 MCCH变更通知的发送时刻向用户终端发送 MCCH变更通知。 本应用场景中, 用户终端正确接收一次基站发送的 MCCH变更通知后, 不再 接收下一个 MCCH修改边界之前基站发送的其他 MCCH变更通知。
下面介绍通知周期大于 Max SFN、 即 SFN cycle的情况, 此时, 基站通过 MCCH向用户终端发送计数器 n或计数器 m, 以帮助终端正确找到 MCCH变 更通知发送的时刻,参数 n和参数 m对应于两种用户终端获取 MCCH变更通 知的方式, 下面逐一介绍:
第一种方式下用户终端获取 MCCH变更通知的具体过程如图 7和图 8所 示, 其中, n为当前 SFN扩展倍数, 为大于等于 0的正整数, 其取值如下: n_j 2
Figure imgf000012_0001
其中, n丽』 NotiflcationPeriod 1 MaxSFN 称为最大 SFN扩展倍数, 表示 Notification与 MaxSFN取模。
具体的, 此时用户终端获取 MCCH变更通知的过程包括以下步骤: 步骤 701, 基站通知用户终端通过 PDCCH发送 MCCH变更通知的通知 周期、 通知接收时刻偏移量以及通知发送窗口, 并与用户终端约定 MCCH变 更通知的发送时刻的获取方式。
此时, 该 MCCH变更通知的发送时刻的获取方式为:
(n * MaxSFN + SFN) mod NotificationPeriod =
NotificationAllocationOf set; ( 2 )
根据上述介绍可以知道, n为当前 SFN扩展倍数, 每过一个 SFN周期 n 加 1 , NotificationPeriod为通知周期, NotificationAllocationOffset为通知接收 时刻偏移量。
步骤 702, 基站计算 MCCH变更通知的发送时刻, 将满足式(2 )的 SFN 扩展倍数为 n的 SFN周期的系统帧时刻确定为 MCCH变更通知的发送时刻, 在每一发送时刻通过 PDCCH以及通知窗口内的子帧向用户终端发送 MCCH 变更通知。
在一个 MCCH修改周期内,基站根据计算获得的发送 MCCH变更通知的 发送时刻向用户终端发送至少 N次 MCCH变更通知。该发送时刻具体为系统 帧的指定子帧位置, 通知发送窗口的大小 K的具体值为通知发送窗口内的子 帧个数或者 MBSFN子帧个数, K的值小于等于 N, 且大于等于 1。
具体的, 基站根据上式 (2 )进行计算, 满足式 (2 ) 的时刻有多个, 基 站在每一满足式( 2 ) 的时刻通过 PDCCH向用户终端发送 MCCH变更通知, 并从该时刻起通过通知发送窗口内的每一子帧或者每一 MBSFN 子帧重复发 送 MCCH变更通知。
步骤 703, 用户终端根据式 (2 )计算基站发送 MCCH变更通知的时刻, 在该时刻监听 PDCCH以及通知发送窗口内的子帧, 获取基站发送的 MCCH 变更通知。
用户终端获取基站发送 MCCH变更通知的时刻后, 每过一个 SFN cycle 的时间就会自动更新该数值, 并且到满足公式(2 ) 的时刻去监听通知发送信 息。 与步骤 203中相同, 用户终端正确接收一次基站发送的 MCCH变更通知 后, 不再监听通知发送窗口内的其他子帧。
第二种方式下 m为 MCCH重复周期计数器 (McchRpCount ), 如图 9和 图 10所示,通过 MCCH信道在每个 MCCH重复周期内发送 m,在每个 MCCH 修改周期内, 每次发送 m时以步长 1增加。
具体的, 用户终端获取 MCCH变更通知的具体过程如图 9所示, 包括以 下步骤:
步骤 901, 基站通知用户终端通过 PDCCH发送 MCCH变更通知的通知 周期、 通知接收时刻偏移量, 并与用户终端约定 MCCH变更通知的发送时刻 的获取方式。
此时, 该 MCCH变更通知的发送时刻的获取方式为:
m*McchRepetitionPeriod mod McchNotificationPeriod =
NotificationAllocationOffset; ( 3 )
步骤 902, 基站通过计算 MCCH变更通知的发送时刻, 将满足式(3 )的 第 m个 MCCH重复周期内的系统帧时刻确定为 MCCH变更通知的发送时刻, 在每一发送时刻通过 PDCCH以及通知窗口内的子帧向用户终端发送 MCCH 变更通知。
在一个 MCCH修改周期内,基站根据计算获得的发送 MCCH变更通知的 发送时刻向用户终端发送至少 N次 MCCH变更通知, N的具体值小于等于下 一 MCCH修改边界之前的通知发送时刻的个数。
步驟 903, 用户终端根据式(3 )计算基站发送 MCCH变更通知的时刻, 在该时刻监听 PDCCH, 获取基站发送的 MCCH变更通知, 并在正确接收一 次基站发送的 MCCH变更通知后, 不再监听 PDCCH。
通过采用本发明提供的方法, 基站与用户终端获取相同的 MCCH变更通 知的发送时刻, 且基站在一个 MCCH修改周期内, 4艮据该时刻向用户终端发 送至少 N次 MCCH变更通知 , 用户终端在一个 MCCH修改周期内没有接收 到 MCCH变更通知时, 根据该时刻接收至少 N次 MCCH变更通知, 从而提 高了 MCCH变更通知的发送和接收效率, 降低了了因为信道条件差或者其他 原因导致终端不能正确接收该通知的概率; 而且, 该时刻可以避开用户终端 的寻呼机会, 从而降低了由于 PDCCH上网络标识过多而错误处理 MCCH变 更通知的几率。
本发明的实施例提供一种多播控制信道 MCCH变更通知的发送装置, 如 图 11所示, 包括:
时刻获取单元 11, 用于获取 MCCH变更通知的发送时刻;
通知发送单元 12, 用于在一个 MCCH修改周期内, 根据所述时刻获取单 元获取的发送时刻向用户终端发送至少 N次所述 MCCH变更通知,所述 N为 预先设置的所述 MCCH变更通知的发送次数。
所述时刻获取单元 11具体用于: 获取 MCCH变更通知的通知周期和通 知接收时刻偏移量;
根据系统帧编号 SFN以及获取的所述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻。
具体的, 当所述通知周期小于或者等于 MaxSFN时, 所述时刻获取单元 11将所述 SFN与所述通知周期进行取模运算, 结果等于所述通知接收时刻偏 移量时,将所述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻; 当所述通知周期大于 MaxSFN时, 所述时刻获取单元 11将所述 SFN与所述 通知周期进行取模运算, 当满足下式时: (n * MaxSFN + SFN) mod通知周期= 通知接收时刻偏移量,将 SFN扩展倍数为 n的 SFN周期的所述系统帧的指定 子帧位置作为所述 MCCH变更通知的发送时刻。
所述通知发送单元 12具体用于: 获取一个或多个预先设置的通知发送窗 口, 从所述系统帧的指定子帧位置开始通过所述通知发送窗口内的子帧或者 多播 /广播单频网络 MBSFN子帧发送至少 N次所述 MCCH变更通知,所述通 知发送窗口的大小 K 的具体值为所述通知发送窗口内的子帧个数或者 MBSFN子帧个数, 所述 K的值小于等于 N, 且大于等于 1。
所述时刻获取单元 11还用于: 将 MCCH重复周期与所述通知周期进行 取模运算, 当满足下式时: (m *MCCH重复周期) mod通知周期=通知接收时 刻偏移量, 将第 m个 MCCH重复周期的开始时刻作为所述 MCCH变更通知 的发送时刻, 其中 m为 MCCH重复周期计数器。
所述通知发送单元 12还用于: 在下一 MCCH修改边界之前的至少 N个 MCCH变更通知的发送时刻, 通过 PDCCH发送所述 MCCH变更通知, 所述 N的具体值小于等于所述下一 MCCH修改边界之前的 MCCH变更通知的发送 时刻的个数。
可以但不限于基于下述方式设置 N的值:
N=最短的 MCCH修改周期 / MCCH变更通知的重复周期 其中, MCCH变更通知的重复周期为在一个 MCCH修改周期内, 重复发 送 MCCH变更通知的最短时间间隔, 最短的 MCCH修改周期是覆盖该基站 / 小区的多个 MBSFN区域中对应的最短的 MCCH的发送周期。
本发明的实施例提供一种用户终端, 如图 12所示, 包括:
时刻获取单元 21, 用于获取 MCCH变更通知的发送时刻;
通知接收单元 22, 用于在一个 MCCH修改周期内没有接收到 MCCH变 更通知时,根据所述 MCCH变更通知的发送时刻, 至少 N次接收所述 MCCH 变更通知, 所述 N为预先设置的所述 MCCH变更通知的接收次数。
所述时刻获取单元 21具体用于:
获取 MCCH变更通知的通知周期和通知接收时刻偏移量;
根据系统帧编号 SFN以及获取的所述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻。
具体的, 当所述通知周期小于或者等于 MaxSFN时, 所述时刻获取单元 21将所述 SFN与所述通知周期进行取模运算, 结果等于所述通知接收时刻偏 移量时,将所述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻; 当所述通知周期大于 MaxSFN时, 所述时刻获取单元 21将所述 SFN与所述 通知周期进行取模运算, 当满足下式时: (n * MaxSFN + SFN) mod通知周期= 通知接收时刻偏移量,将 SFN扩展倍数为 n的 SFN周期的所述系统帧的指定 子帧位置作为所述 MCCH变更通知的发送时刻。
所述通知接收单元 22具体用于:获取至少一个预先设置的通知发送窗口, 从所述系统帧的指定子帧位置开始侦听所述通知发送窗口内的子帧或者多播 / 广播单频网络 MBSFN子帧, 获取所述基站发送的 MCCH变更通知; 并在一 个 MCCH修改周期内没有接收到 MCCH变更通知时,通过所述通知发送窗口 至少 N次接收所述 MCCH变更通知,所述通知发送窗口的大小 K的具体值为 所述通知发送窗口内的子帧个数或者 MBSFN子帧个数, 所述 K的值小于等 于 N, 且大于等于 1。
所述通知接收单元 22还用于: 当正确接收一次所述 MCCH变更通知后, 停止侦听所述通知发送窗口内的子帧或者 MBSFN子帧的 PDCCH中是否存在 所述特定 RNTI或者 M-RNTL
所述时刻获取单元 21具体用于: 将 MCCH重复周期与所述通知周期进 行取模运算, 当满足下式时: (m*MCCH重复周期) mod通知周期=通知接收 时刻偏移量, 将第 m个 MCCH重复周期的开始时刻作为所述 MCCH变更通 知的发送时刻, 其中 m为 MCCH重复周期计数器。
所述通知接收单元 22还用于: 在下一 MCCH修改边界之前的至少 N个 MCCH变更通知的发送时刻侦听所述 PDCCH, 尝试接收所述 MCCH变更通 知。
所述通知接收单元 22还用于: 在正确接收一次所述 MCCH变更通知后, 停止在下一个 MCCH修改边界之前的其他通知发送时刻侦听 PDCCH中是否 存在特定 RNTI或者 M-RNTL
可以但不限于基于下述方式设置 N的值:
N=最短的 MCCH修改周期 / MCCH变更通知的重复周期 .
其中, MCCH变更通知的重复周期为在一个 MCCH修改周期内, 重复接 收 MCCH变更通知的最短时间间隔, 最短的 MCCH修改周期是覆盖该基站 / 小区的多个 MBSFN区域中对应的最短的 MCCH的发送周期。
通过采用本发明提供的装置和用户终端, 基站与用户终端获取相同的 MCCH变更通知的发送时刻, 且基站在一个 MCCH修改周期内, 根据该时刻 向用户终端发送至少 N次 MCCH变更通知, 用户终端在一个 MCCH修改周 期内没有接收到 MCCH变更通知时, 根据该时刻接收至少 N次 MCCH变更 通知, 从而提高了 MCCH变更通知的发送和接收效率, 降低了了因为信道条 件差或者其他原因导致终端不能正确接收该通知的概率; 而且, 该时刻可以 避开用户终端的寻呼机会,从而降低了由于 PDCCH上网络标识过多而错误处 理 MCCH变更通知的几率。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本发 明可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技术方案 该计算机软件产品存储在一个存储介盾中, 包括若干指令用以使得一台计算 机设备(可以是个人计算机, 服务器, 或者网络设备等)执行本发明各个实 施例所述的方法。
本领域技术人员可以理解附图只是一个优选实施例的示意图, 附图中的 模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描述 进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实施例的一 个或多个装置中。 上述实施例的模块可以合并为一个模块, 也可以进一步拆 分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。
以上公开的仅为本发明的几个具体实施例, 但是, 本发明并非局限于此, 任何本领域的技术人员能思之的变化都应落入本发明的保护范围。

Claims

权 利 要 求
1、 一种多播控制信道 MCCH变更通知的接收方法, 其特征在于, 包括: 获取 MCCH变更通知的发送时刻; 并
在一个 MCCH 修改周期内没有接收到 MCCH 变更通知时, 根据所述 MCCH变更通知的发送时刻, 至少 N次接收所述 MCCH变更通知, 所述 N 为预先设置的所述 MCCH变更通知的接收次数。
2、 如权利要求 1 所述的方法, 其特征在于, 所述获取 MCCH变更通知 的发送时刻, 具体包括:
获取 MCCH变更通知的通知周期和通知接收时刻偏移量;
根据系统帧编号 SFN以及获取的所述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻。
3、 如权利要求 2所述的方法, 其特征在于, 所述根据 SFN以及获取的所 述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻 , 具体包括:
当所述通知周期小于或者等于最大系统帧编号 MaxSFN时, 将所述 SFN 与所述通知周期进行取模运算, 结果等于所述通知接收时刻偏移量时, 将所 述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻。
4、 如权利要求 2所述的方法, 其特征在于, 所述根据 SFN以及获取的所 述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻, 具体包括:
当所述通知周期大于 MaxSFN时, 将所述 SFN与所述通知周期进行取模 运算, 当满足下式时: (n * MaxSFN + SFN) mod通知周期=通知接收时刻偏移 量,将 SFN扩展倍数为 n的 SFN周期的所述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻。
5、 如权利要求 3或 4所述的方法, 其特征在于, 所述在一个 MCCH修 改周期内没有接收到 MCCH变更通知时,根据所述 MCCH变更通知的发送时 刻, 至少 N次接收所述 MCCH变更通知, 具体包括:
获取至少一个预先设置的通知发送窗口, 从所述系统帧的指定子帧位置 开始侦听所述通知发送窗口内的子帧或者多播 /广播单频网络 MBSFN子帧, 获取所述基站发送的 MCCH变更通知;并在一个 MCCH修改周期内没有接收 到 MCCH变更通知时, 通过所述通知发送窗口至少 N次接收所述 MCCH变 更通知, 所述通知发送窗口的大小 K的具体值为所述通知发送窗口内的子帧 个数或者 MBSFN子帧个数, 所述 K的值小于等于 N, 且大于等于 1。
6、 如权利要求 5所述的方法, 其特征在于, 所迷根据所述 MCCH变更 通知的发送时刻, 至少 N次接收所述 MCCH变更通知, 具体包括:
当正确接收一次所述 MCCH变更通知后, 停止侦听所述通知发送窗口内
7、 如权利要求 2所述的方法, 其特征在于, 所述获取 MCCH变更通知 的发送时刻具体为:
将 MCCH 重复周期与所述通知周期进行取模运算, 当满足下式时: ( m*MCCH重复周期)mod通知周期=通知接收时刻偏移量,将第 m个 MCCH 重复周期的开始时刻作为所述 MCCH变更通知的发送时刻,其中 m为 MCCH 重复周期计数器。
8、 如权利要求 1所述的方法, 其特征在于, 所述根据所述 MCCH变更 通知的发送时刻, 至少 N次接收所述 MCCH变更通知, 具体包括:
在下一 MCCH修改边界之前的至少 N个 MCCH变更通知的发送时刻侦 听所述 PDCCH, 接收所述 MCCH变更通知。
9、 如权利要求 8所述的方法, 其特征在于, 所述根据所述 MCCH变更 通知的发送时刻, 至少 N次接收所述 MCCH变更通知还包括:
在正确接收一次所述 MCCH变更通知后,停止在下一个 MCCH修改边界 之前的其他通知发送时刻侦听 PDCCH中是否存在特定 RNTI或者 M-RNTL
10、 如权利要求 1所述的方法, 其特征在于, 基于下述方式设置 N的值:
N=最短的 MCCH修改周期 / MCCH变更通知的重复周期 其中, MCCH变更通知的重复周期为在一个 MCCH修改周期内, 重复接 收 MCCH变更通知的最短时间间隔。
11、 一种用户终端, 其特征在于, 包括:
时刻获取单元, 用于获取 MCCH变更通知的发送时刻;
通知接收单元,用于在一个 MCCH修改周期内没有接收到 MCCH变更通 知时, 根据所述 MCCH变更通知的发送时刻, 至少 N次接收所述 MCCH变 更通知, 所述 N为预先设置的所述 MCCH变更通知的接收次数。
12、 如权利要求 11所述的用户终端, 其特征在于, 所述时刻获取单元具 体用于:
获取 MCCH变更通知的通知周期和通知接收时刻偏移量;
根据系统帧编号 SFN以及获取的所述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻。
13、 如权利要求 11所述的用户终端, 其特征在于, 所述时刻获取单元具 体用于:
当所述通知周期小于或者等于最大系统帧编号 MaxSFN时, 将所述 SFN 与所述通知周期进行取模运算, 结果等于所述通知接收时刻偏移量时, 将所 述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻。
14、 如权利要求 11所述的用户终端, 其特征在于, 所述时刻获取单元具 体用于:
当所述通知周期大于 MaxSFN时, 将所述 SFN与所述通知周期进行取模 运算, 当满足下式时: (n * MaxSFN + SFN) mod通知周期=通知接收时刻偏移 量,将 SFN扩展倍数为 n的 SFN周期的所述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻。
15、 如权利要求 13或 14所述的用户终端, 其特征在于, 所述通知接收 单元具体用于:
获取至少一个预先设置的通知发送窗口, 从所述系统帧的指定子帧位置 开始侦听所述通知发送窗口内的子帧或者多播 /广播单频网络 MBSFN子帧, 获取所述基站发送的 MCCH变更通知;并在一个 MCCH修改周期内没有接收 到 MCCH变更通知时, 通过所述通知发送窗口至少 N次接收所述 MCCH变 更通知, 所述通知发送窗口的大小 K的具体值为所述通知发送窗口内的子帧 个数或者 MBSFN子帧个数, 所述 K的值小于等于 N, 且大于等于 1。
16、 如权利要求 15所述的用户终端, 其特征在于, 所述通知接收单元还 用于:
当正确接收一次所述 MCCH变更通知后, 停止侦听所述通知发送窗口内 的子帧或者 MBSFN子帧的 PDCCH中是否存在所述特定 RNTI或者 M-RNTI。
17、 如权利要求 12所述的用户终端, 其特征在于, 所述时刻获取单元具 体用于:
将 MCCH 重复周期与所述通知周期进行取模运算, 当满足下式时: ( m*MCCH重复周期)mod通知周期=通知接收时刻偏移量,将第 m个 MCCH 重复周期的开始时刻作为所述 MCCH变更通知的发送时刻,其中 m为 MCCH 重复周期计数器。
18、 如权利要求 11所述的用户终端, 其特征在于, 所述通知接收单元还 用于:
在下一 MCCH修改边界之前的至少 N个 MCCH变更通知的发送时刻侦 听所述 PDCCH, 接收所述 MCCH变更通知。
19、 如权利要求 18所述的用户终端, 其特征在于, 所述通知接收单元还 用于:
在正确接收一次所述 MCCH变更通知后,停止在下一个 MCCH修改边界 之前的其他通知发送时刻侦听 PDCCH中是否存在特定 RNTI或者 M-RNTI。
20、 如权利要求 11所述的用户终端, 其特征在于, 基于下述方式设置 N 的值:
N=最短的 MCCH修改周期 / MCCH变更通知的重复周期 其中, MCCH变更通知的重复周期为在一个 MCCH修改周期内, 重复接 收 MCCH变更通知的最短时间间隔。
21、 一种多播控制信道 MCCH变更通知的发送方法, 其特征在于, 包括: 基站获取 MCCH变更通知的发送时刻; 并
在一个 MCCH修改周期内,根据所述发送时刻向用户终端发送至少 N次 所述 MCCH变更通知, 所述 N为预先设置的所述 MCCH变更通知的发送次 数。
22、 如权利要求 21 所述的方法, 其特征在于, 所述基站获取 MCCH变 更通知的发送时刻, 具体包括:
所述基站获取 MCCH变更通知的通知周期和通知接收时刻偏移量; 根据系统帧编号 SFN以及获取的所述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻。
23、 如权利要求 21所述的方法, 其特征在于, 所述根据 SFN以及获取的 所述通知周期和通知接收时刻偏移量,获取所述 MCCH变更通知的发送时刻, 具体包括:
当所述通知周期小于或者等于最大系统帧编号 MaxSFN时, 所述基站将 所述 SFN与所述通知周期进行取模运算, 结果等于所述通知接收时刻偏移量 时, 所述基站将所述系统帧的指定子帧位置作为所述 MCCH变更通知的发送 时刻。
24、 如权利要求 21所述的方法, 其特征在于, 所述根据 SFN以及获取的 所述通知周期和通知接收时刻偏移量,获取所述 MCCH变更通知的发送时刻, 具体包括:
当所述通知周期大于 MaxSFN时, 所述基站将所述 SFN与所述通知周期 进行取模运算, 当满足下式时: (n * MaxSFN + SFN) mod通知周期=通知接收 时刻偏移量,所述基站将 SFN扩展倍数为 n的 SFN周期的所述系统帧的指定 子帧位置作为所述 MCCH变更通知的发送时刻。
25、 如权利要求 23或 24所述的方法, 其特征在于, 所述在一个 MCCH 修改周期内,根据所述发送时刻向用户终端发送至少 N次所述 MCCH变更通 知, 具体包括: 所述基站获取一个或多个预先设置的通知发送窗口, 从所述系统帧的指 定子帧位置开始通过所述通知发送窗口内的子帧或者多播 /广播单频网络
MBSFN子帧发送至少 N次所述 MCCH变更通知, 所述通知发送窗口的大小 K的具体值为所述通知发送窗口内的子帧个数或者 MBSFN子帧个数,所述 K 的值小于等于 N, 且大于等于 1。
26、 如权利要求 22所述的方法, 其特征在于, 所述基站荻取 MCCH变 更通知的发送时刻, 具体包括:
所述基站将 MCCH重复周期与所述通知周期进行取模运算, 当满足下式 时: (m *MCCH重复周期) mod通知周期=通知接收时刻偏移量, 所述基站将 第 m个 MCCH重复周期的开始时刻作为所述 MCCH变更通知的发送时刻, 其中 m为 MCCH重复周期计数器。
27、 如权利要求 21 所述的方法, 其特征在于, 所述在一个 MCCH修改 周期内, 根据所述发送时刻向用户终端发送至少 N次所述 MCCH变更通知, 具体包括:
所述基站在下一 MCCH修改边界之前的至少 N个 MCCH变更通知的发 送时刻, 通过 PDCCH发送所述 MCCH变更通知, 所述 N的具体值小于等于 所述下一 MCCH修改边界之前的 MCCH变更通知的发送时刻的个数。
28、如权利要求 21所述的方法,其特征在于,基于下述方式设置 N的值:
N=最短的 MCCH 改周期 / MCCH变更通知的重复周期 其中, MCCH变更通知的重复周期为在一个 MCCH 改周期内, 重复发 送 MCCH变更通知的最短时间间隔。
29、 一种多播控制信道 MCCH变更通知的发送装置, 其特征在于, 包括: 时刻获取单元, 用于获取 MCCH变更通知的发送时刻;
通知发送单元, 用于在一个 MCCH修改周期内, 根据所述时刻获取单元 获取的发送时刻向用户终端发送至少 N次所述 MCCH变更通知,所述 N为预 先设置的所述 MCCH变更通知的发送次数。
30、 如权利要求 29所述的装置, 其特征在于, 所述时刻获取单元具体用 于:
获取 MCCH变更通知的通知周期和通知接收时刻偏移量;
根据系统帧编号 SFN以及获取的所述通知周期和通知接收时刻偏移量, 获取所述 MCCH变更通知的发送时刻。
31、 如权利要求 30所述的装置, 其特征在于, 所述时刻获取单元具体用 于:
当所述通知周期小于或者等于最大系统帧编号 MaxSFN时, 将所述 SFN 与所述通知周期进行取模运算, 结果等于所述通知接收时刻偏移量时, 将所 述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻。
32、 如权利要求 30所述的装置, 其特征在于, 所述时刻获取单元具体用 于:
当所述通知周期大于 MaxSFN时, 将所述 SFN与所述通知周期进行取模 运算, 当满足下式时: (n * MaxSFN + SFN) mod通知周期=通知接收时刻偏移 量,将 SFN扩展倍数为 n的 SFN周期的所述系统帧的指定子帧位置作为所述 MCCH变更通知的发送时刻。
33、 如权利要求 31或 32所述的装置, 其特征在于, 所述通知发送单元 具体用于:
获取一个或多个预先设置的通知发送窗口, 从所述系统帧的指定子帧位 置开始通过所述通知发送窗口内的子帧或者多播 /广播单频网络 MBSFN子帧 发送至少 N次所述 MCCH变更通知,所述通知发送窗口的大小 K的具体值为 所述通知发送窗口内的子帧个数或者 MBSFN子帧个数, 所述 K的值小于等 于 N, 且大于等于 1。
34、如权利要求 31所述的装置, 其特征在于, 所述时刻获取单元还用于: 将 MCCH 重复周期与所述通知周期进行取模运算, 当满足下式时: (m
*MCCH重复周期) mod通知周期=通知接收时刻偏移量, 将第 m个 MCCH 重复周期的开始时刻作为所述 MCCH变更通知的发送时刻,其中 m为 MCCH 重复周期计数器。
35、如权利要求 30所述的装置,其特征在于,所述通知发送单元还用于: 在下一 MCCH修改边界之前的至少 N个 MCCH变更通知的发送时刻, 通过 PDCCH发送所述 MCCH变更通知, 所述 N的具体值小于等于所述下一 MCCH修改边界之前的 MCCH变更通知的发送时刻的个数。
36、如权利要求 29所述的装置,其特征在于,基于下述方式设置 N的值:
N=最短的 MCCH修改周期 / MCCH变更通知的重复周期 其中, MCCH变更通知的重复周期为在一个 MCCH修改周期内, 重复发 送 MCCH变更通知的最短时间间隔。
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CN101998279B (zh) 2013-03-27
EP2466977A4 (en) 2014-01-15
CN101998279A (zh) 2011-03-30
KR20120061883A (ko) 2012-06-13
RU2552185C2 (ru) 2015-06-10
JP5686804B2 (ja) 2015-03-18
KR101358097B1 (ko) 2014-02-05
EP2466977B1 (en) 2019-01-02
RU2012108413A (ru) 2013-09-20
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US20120230347A1 (en) 2012-09-13
US8948194B2 (en) 2015-02-03

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