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WO2008101440A1 - Procédé et dispositif de transfert de porteuse dans un système mbms - Google Patents

Procédé et dispositif de transfert de porteuse dans un système mbms Download PDF

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Publication number
WO2008101440A1
WO2008101440A1 PCT/CN2008/070315 CN2008070315W WO2008101440A1 WO 2008101440 A1 WO2008101440 A1 WO 2008101440A1 CN 2008070315 W CN2008070315 W CN 2008070315W WO 2008101440 A1 WO2008101440 A1 WO 2008101440A1
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WO
WIPO (PCT)
Prior art keywords
carrier
mbms
migration
unit
resident
Prior art date
Application number
PCT/CN2008/070315
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English (en)
Chinese (zh)
Inventor
Guosheng Zhao
Wenqing Wang
Junli Guo
Yu Ding
Original Assignee
Da Tang Mobile Communications Equipment Co., Ltd.
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 Da Tang Mobile Communications Equipment Co., Ltd. filed Critical Da Tang Mobile Communications Equipment Co., Ltd.
Publication of WO2008101440A1 publication Critical patent/WO2008101440A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to the field of multimedia broadcast and multicast service (MBMS) technologies, and in particular, to a method and apparatus for carrier migration in MBMS.
  • MBMS multimedia broadcast and multicast service
  • the MBMS service is a new service that is being standardized by the 3GPP Partnership (3GPP) organization.
  • the MBMS service is a one-way point-to-multipoint service. The biggest advantage of this service is that it can effectively utilize wireless resources and network resources.
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • the MBMS dedicated carrier is dedicated to the transmission of MBMS services and corresponding control information.
  • the MBMS dedicated carrier exists in the downlink channel, such as: MBMS indication channel (MICH, MBMS Indication Channel), MBMS control channel (MCCH, MBMS Control Channel), and MBMS point-to-multipoint scheduling channel (MSCH, MBMS Schedule Channel), etc. for MBMS.
  • MICH MBMS indication channel
  • MCCH MBMS Control Channel
  • MSCH MBMS point-to-multipoint scheduling channel
  • the downstream channel of the service can also provide a downlink common channel such as BCH, which is used to provide system information and incoming incoming information for users on the MBMS dedicated carrier, so as to provide a service selection function for the user.
  • BCH downlink common channel
  • the hybrid carrier while carrying the MBMS service, can also provide services for other services, such as: VoIP, MMS, and so on.
  • the technical problem to be solved by the present invention is to provide a method and apparatus for carrier migration in MBMS, so that those skilled in the art can implement a migration of a subscriber from a hybrid carrier to an MBMS dedicated carrier according to the method and apparatus.
  • a method for carrier migration in the MBMS of the multimedia broadcast and multicast service includes: the user equipment UE learns that the network side will initiate the MBMS subscribed by the UE and obtains the
  • the description information of the MBMS is included, if there is a migration indication in the MBMS description information, whether to perform carrier migration according to the migration policy is determined;
  • the UE When the UE decides to perform carrier migration, it performs synchronization according to the MBMS radio parameter information in the MBMS description information to the MBMS dedicated carrier, and performs a MBMS reception related process.
  • the UE When the UE synchronizes with the MBMS dedicated carrier, the UE stores the related information of the original resident carrier of the UE. When the UE migrates from the MBMS dedicated carrier to the original resident carrier, the UE performs the homebound carrier according to the original resident carrier related information of the UE.
  • the UE When the UE synchronizes with the MBMS dedicated carrier, the related information of the original resident carrier of the UE is saved;
  • the UE If the UE does not complete the synchronization to the MBMS dedicated carrier within the preset number of migration times, it confirms that the synchronization fails;
  • the UE relocates to the original resident carrier according to the saved information about the original resident carrier.
  • the UE When the UE does not complete the relocation to the original resident carrier, it enters the cell selection/reselection process and camps on the appropriate cell.
  • the UE When the UE synchronizes to the MBMS dedicated carrier, the UE saves the MBMS description information.
  • MBMS service identifier
  • a corresponding MBMS reception request is initiated to the network side.
  • the migration indication is explicit signaling, or the cross-carrier resource configuration indication signaling that can be carried on the MCCH channel.
  • the migration policy is:
  • Carrier migration is performed when the UE is in the idle Idle state.
  • the network side is notified not to perform corresponding charging processing.
  • a delivery verification message is sent to the network side indicating that the reception was not successful.
  • An apparatus for carrier migration in a multimedia broadcast and multicast service MBMS comprising: a querying unit, configured to: when the UE learns that the network side initiates the MBMS subscribed by the UE and obtains the description information of the MBMS, querying the MBMS description information Whether there is a migration indication in the middle;
  • a migration judging unit configured to determine whether to perform carrier migration according to the migration policy when the query unit queries the migration indication
  • a migration unit configured to: when the migration determining unit determines to perform carrier migration, trigger the UE to synchronize to the MBMS dedicated carrier according to the MBMS radio parameter information in the MBMS description information, and perform a related process of MBMS reception.
  • a storage unit configured to save, when the UE synchronizes with the MBMS dedicated carrier, information related to the original resident carrier of the UE;
  • a first relocation unit configured to trigger the UE to perform a backhaul from the MBMS dedicated carrier to the original resident carrier according to the saved original resident carrier related information.
  • it also includes:
  • a storage unit configured to save, when the UE synchronizes with the MBMS dedicated carrier, information related to the original resident carrier of the UE;
  • a synchronization failure confirmation unit configured to confirm that the synchronization fails if the UE does not complete synchronization with the MBMS dedicated carrier within the preset migration limit
  • the second relocation unit is configured to trigger the UE to perform the fetching to the original resident carrier according to the saved original residing carrier related information when the synchronization failure is confirmed.
  • the cell reselection unit is configured to trigger the UE to enter a cell selection/reselection process when the UE does not complete the relocation to the original resident carrier, so that the UE camps on the appropriate cell.
  • An identifier storage unit configured to save an MBMS service identifier in the MBMS description information when the UE synchronizes with the MBMS dedicated carrier;
  • a requesting unit configured to: after the UE re-resident to the appropriate cell, trigger the UE to initiate a corresponding MBMS receiving request to the network side according to the MBMS service identifier stored by the identifier storage unit.
  • the migration policy is:
  • Carrier migration is performed when the UE is in the idle Idle state.
  • the stop charging notification unit is configured to notify the network side that the corresponding charging process is not performed when the UE fails to migrate to the MBMS dedicated carrier.
  • the indicating unit is configured to: after the UE re-resident to the appropriate cell, trigger the UE to send a delivery verification message to the network side, indicating that the receiving is not successful. It can be seen that the present invention provides an explicit method and apparatus for a UE to migrate from a hybrid carrier to an MBMS dedicated carrier. Those skilled in the art can implement a method for migrating a subscriber from a hybrid carrier to an MBMS dedicated carrier according to the method and apparatus provided by the present invention.
  • DRAWINGS Figure 1 is a flow chart of Embodiment 1 of the method of the present invention.
  • Figure 2 is a flow chart of Embodiment 2 of the method of the present invention.
  • Figure 3 is a schematic view of the first apparatus of the present invention.
  • Figure 4 is a schematic view of a second device of the present invention.
  • Figure 5 is a schematic view of a third device of the present invention.
  • FIG. 6 is a schematic illustration of a fourth apparatus of the present invention. detailed description
  • the invention is based on the MBMS evolution architecture, and implements a corresponding method and device for the MBMS service subscriber to migrate from the hybrid carrier to the MBMS dedicated carrier for the MBMS dedicated carrier.
  • MBMS service subscriber which will be simply referred to as "subscribing user equipment (UE)”.
  • FIG. 1 is a flowchart of Embodiment 1.
  • step 101 the strategy for carrier migration is customized. After receiving the migration indication sent by the network side, the subscribed UE performs corresponding processing according to its current state and carrier migration policy.
  • the migration policy can be customized for the subscribed UEs of the two states separately.
  • the process of migrating to the designated MBMS dedicated carrier will be performed.
  • step 102 when the system is running, the subscription UE monitors the indication bit of the MBMS related information on the MICH.
  • step 103 the subscribing UE demodulates the "MBMS service description information" carried on the MCCH associated with the MICH when the MBMS service indicated by the indication bit is found to be the MBMS service subscribed thereto.
  • the subscription UE monitors the indication bit of the MBMS group (MBMS Group) in the MBMS related information indication bit on the MICH, and subscribes to the index corresponding to the MBMS group subscribed by the UE.
  • the display bit is set to ' ⁇ , it indicates that the network side will send the MBMS service subscribed to by the subscribed UE.
  • the MBMS service description information includes the MBMS service identifier and corresponding MBMS wireless parameter information.
  • the subscribing UE will demodulate the MBMS radio parameter information to obtain a corresponding radio bearer description, including: a radio bearer parameter, a transport channel, and a physical channel parameter.
  • step 105 the subscribing UE queries the migration indication, and the network indication indicates that the migration process to the "MBMS dedicated carrier" is performed. .
  • the migration indication is not necessarily “explicit” signaling, and may be cross-carrier resource configuration indication signaling, which may be carried on the MCCH channel.
  • step 106 the subscribing UE synchronizes with the MBMS dedicated carrier according to the parameters shown in the MBMS radio parameter information, and performs MBMS service reception. process.
  • the subscriber can be migrated from the hybrid carrier to the MBMS dedicated carrier.
  • the target of the migration is the MBMS dedicated carrier and there is no uplink channel, there is no handshake mechanism to ensure the success of the migration.
  • the MBMS dedicated carrier since the MBMS dedicated carrier only exists on the downlink channel, which limits the support capability of the UE to initiate the service, based on such characteristics, the MBMS dedicated carrier is not suitable for the long-term resident of the idle UE.
  • the subscription UE fails to migrate to the MBMS dedicated carrier, what subsequent processing is required is also the focus of the present invention.
  • the present invention proposes a method for performing subsequent processing when a subscription UE migration fails.
  • step 201 the carrier migration policy is customized, and the number of times the subscription UE migrates to the MBMS dedicated carrier is preset.
  • a limited number of repetitions may be implemented according to a predefined number of times to improve the probability of acquiring synchronization.
  • step 202 when the system is running, the subscription UE monitors the MBMS related on the MICH.
  • the indication bit of the message when the system is running, the subscription UE monitors the MBMS related on the MICH. The indication bit of the message.
  • step 203 the subscribing UE demodulates the "MBMS service description information" carried on the MCCH associated with the MICH when the MBMS service indicated by the indication bit is found to be the MBMS service subscribed to by the indication.
  • the subscribing UE will demodulate the MBMS radio parameter information to obtain a corresponding radio bearer description, including: a radio bearer parameter, a transport channel, and a physical channel parameter.
  • step 205 the subscribing UE queries the migration indication, and the network indication indicates that the migration process to the "MBMS dedicated carrier" is performed.
  • the subscribing UE After the UE is determined to perform carrier migration according to its current state and carrier migration policy, in step 206, the subscribing UE synchronizes with the MBMS dedicated carrier according to the parameters shown in the MBMS radio parameter information, and performs MBMS service reception. process.
  • step 207 when the subscribing UE synchronizes with the MBMS dedicated carrier, the related information of the original resident carrier is saved.
  • step 208 the subscribing UE does not complete the synchronization to the MBMS dedicated carrier within the limit of the number of times, and then confirms that the synchronization has failed.
  • step 209 the subscribing UE moves back to the original resident carrier according to the information about the original resident carrier that is saved.
  • Embodiment 2 can be used to implement the forwarding of the subscribing UE to its original resident carrier.
  • the present invention also proposes two methods for performing subsequent processing when the subscribing UE fails to fetch.
  • the first method includes:
  • the subscribed UE enters the cell selection/reselection process and camps on the appropriate cell.
  • the second method includes:
  • the MBMS service identifier is saved.
  • the subscribed UE enters the cell selection/reselection process and camps on the appropriate cell.
  • the UE After receiving the MBMS service successfully, the UE actively initiates a request for receiving the corresponding MBMS service to the network in which the UE resides.
  • the specific MBMS service is indicated by the unsuccessfully received MBMS service identifier saved by the subscribing UE.
  • Embodiment 1 The method for migrating a subscriber to an MBMS dedicated carrier is specifically described in Embodiment 1.
  • the method for performing a migration when a subscriber UE fails to migrate to an MBMS dedicated carrier is specifically described in Embodiment 2.
  • the subsequent processing method of the subscription UE failing to fetch is also specifically described.
  • the subscribing UE When the subscribing UE successfully migrates to the MBMS dedicated carrier and completes the MBMS service reception normally, if the subscribing UE still needs to receive the subsequent MBMS service, it stays on the dedicated carrier and continues to receive the MBMS service; The MBMS service needs to be received. Based on the characteristics of the MBMS dedicated carrier, the subscribing UE should leave the MBMS dedicated carrier and return to the original resident carrier.
  • the method for the UE to relocate from the MBMS dedicated carrier to the original resident carrier is similar to the method for the UE to perform the migration to the MBMS dedicated carrier when the migration fails.
  • the method includes:
  • the UE When the UE synchronizes with the MBMS dedicated carrier, the related information of the original resident carrier is saved. When the UE migrates from the MBMS dedicated carrier to the original resident carrier, the UE relocates to the original resident carrier according to the information about the original resident carrier that is stored.
  • the present invention provides a method for implementing carrier migration in a specific MBMS, which can enable a subscriber to migrate from an original resident carrier to an MBMS dedicated carrier according to the method.
  • the subscription UE can be moved back from the MBMS dedicated carrier to the original resident carrier.
  • the migration failure of the subscribed UE will affect the corresponding service charging process, and the necessary charging assistance support process needs to be provided for the "migration failure.”
  • the present invention is based on the above MBMS.
  • a method for implementing carrier migration is also proposed, and a corresponding charging method for the MBMS service is also proposed.
  • there is a type of MBMS service whose corresponding charging is based on the "delivery verification" of the UE.
  • the failure of the MBMS to subscribe to the UE migration process will affect the corresponding verification response process. Therefore, you need to define support methods for "validation" responses during the failure process, as follows:
  • the subscribed UE When the subscription UE fails to migrate to the MBMS dedicated carrier, the subscribed UE cannot receive the corresponding MBMS service. At this time, the corresponding charging process should also be "rolled back", that is, the charging process is not performed;
  • the subscribing UE When the subscribing UE fails to relocate and camps on the new cell, an access procedure is initiated in the new cell to establish a connection with the network. Therefore, the subscribing UE can send a "delivery verification" message to the network side to indicate "unsuccessful reception” information to the network side, and cooperate with the network side to correctly perform charging.
  • the present invention also proposes a corresponding apparatus for carrier migration in MBMS.
  • the apparatus proposed by the present invention will be specifically described below in conjunction with specific embodiments.
  • FIG. 3 is a schematic diagram of a carrier migration apparatus in MBMS, the apparatus comprising: a query unit 31, a migration judging unit 32, and a migration unit 33.
  • a strategy of carrier migration needs to be customized in advance, and the customized carrier migration policy is saved in the migration judging unit 32.
  • the migration policy can be customized for the subscribed UEs of the two states separately.
  • the subscription UE in the Active state for example: the subscription UE is in the process of VoIP call, or receiving other MBMS services
  • the UE performs a process of migrating to a designated MBMS dedicated carrier.
  • the subscription UE monitors the indication bit of the MBMS related information on the MICH.
  • the subscribed UE demodulates the MBMS service description information carried on the MCCH associated with the MICH when the MBMS service indicated by the indication bit is the MBMS service subscribed to by the indicator.
  • the subscribing UE monitors the indication bit of the MBMS group (MBMS Group) in the MBMS related information indication bit on the MICH.
  • the indication bit corresponding to the MBMS group subscribed by the subscribing UE is set to " ⁇ "
  • the network side will send The subscriber subscribes to the MBMS service subscribed by the UE.
  • the MBMS service description information includes the MBMS service identifier and corresponding MBMS wireless parameter information.
  • the subscribed UE will demodulate the MBMS radio parameter information to obtain the corresponding radio bearer description, including: radio bearer parameters, transport channel and physical channel parameters.
  • the MBMS radio parameter information has a corresponding migration indication, and the query unit 31 can query whether there is a migration indication in the MBMS description information.
  • the migration judging unit 32 will decide whether to notify the subscribing UE to perform carrier migration according to the migration policy.
  • the migration unit 33 will trigger the subscribing UE to perform carrier migration.
  • the UE receives the trigger of the migration unit 33, and synchronizes the MBMS radio parameter information in the MBMS description information to the MBMS dedicated carrier, and performs a MBMS reception process.
  • the migration indication is not necessarily “explicit” signaling, and may be cross-carrier resource configuration indication signaling, which may be carried on the MCCH channel.
  • the subscriber can be migrated from the hybrid carrier to the MBMS dedicated carrier.
  • the target of the migration is the MBMS dedicated carrier and there is no uplink channel, there is no handshake mechanism to ensure the success of the migration.
  • the MBMS dedicated carrier since the MBMS dedicated carrier only exists on the downlink channel, which limits the support capability of the UE to initiate the service, based on such characteristics, the MBMS dedicated carrier is not suitable for the long-term resident of the idle UE.
  • the present invention proposes a device for performing subsequent processing when the subscription UE fails to migrate, and the apparatus is as shown in FIG.
  • the apparatus of Fig. 4 adds a storage unit 41, a synchronization failure confirmation unit 42, and a second relocation unit 43.
  • the synchronization failure confirmation unit 42 the number of times the subscription UE migrates to the MBMS dedicated carrier is preset.
  • the storage unit 41 stores the related information of the subscriber's original resident carrier. If the subscription is not completed within the preset migration limit
  • the synchronization failure confirming unit 42 confirms that the synchronization has failed.
  • the second relocation unit 43 will trigger the subscription UE to perform the backhaul to the original resident carrier according to the information about the original resident carrier saved by the storage unit 41.
  • the migration of the subscribed UE to the MBMS dedicated carrier is specifically described by the apparatus shown in FIG. 3.
  • the apparatus shown in FIG. 4 specifically describes the migration when the subscription UE fails to migrate to the MBMS dedicated carrier.
  • the subscribing UE When the subscribing UE successfully migrates to the MBMS dedicated carrier and completes the MBMS service reception normally, if the subscribing UE still needs to receive the subsequent MBMS service, it stays on the dedicated carrier and continues to receive the MBMS service; The MBMS service needs to be received. Based on the characteristics of the MBMS dedicated carrier, the subscribing UE should leave the MBMS dedicated carrier and return to the original resident carrier.
  • the device for realizing the return of the UE from the MBMS dedicated carrier to the original resident carrier is similar to the device for performing the fetching when the UE migrates to the MBMS dedicated carrier fails, and the device is shown in FIG. 5.
  • the apparatus of Fig. 5 has a memory unit 51 and a first relocation unit 52 as compared with the apparatus shown in Fig. 3.
  • the storage unit 51 saves the information about the original resident carrier of the subscribing UE.
  • the first relocation unit 52 notifies the subscription UE to perform the home migration based on the original resident carrier phase information held by the storage unit 51.
  • the device shown in FIG. 4 can be used to relocate the subscribed UE to its original resident carrier.
  • the device shown in FIG. 5 can be used to implement the subscription of the UE to the original resident carrier.
  • the present invention is based on the apparatus shown in FIG. 4 or FIG. 5 and also proposes a device for performing subsequent processing when the subscription UE fails to move back.
  • the following is a detailed description of the apparatus for performing subsequent processing when the subscribing UE fails to relocate based on the apparatus shown in FIG. 5, and FIG. 6 is a schematic diagram of the apparatus.
  • the device in Fig. 6 adds a cell reselection unit 61 as compared with the device shown in Fig. 5.
  • the cell reselecting unit 61 triggers the subscription to the UE. Entering the cell selection/reselection process, the subscribing UE will re-resident to the appropriate cell. After the UE re-lives successfully, the MBMS related information sent by the network side will be re-monitored.
  • an identification storage unit and a request unit may also be included.
  • the identity storage unit When the subscribing UE synchronizes with the MBMS dedicated carrier, the identity storage unit will save the MBMS service identifier in the MBMS description information. After the subscription UE re-successfully re-resident, the requesting unit will trigger the subscription UE to initiate a corresponding MBMS reception request to the network side according to the MBMS service identifier stored by the identifier storage unit.
  • the present invention provides a device for implementing carrier migration in a specific MBMS, which can enable a subscriber to migrate from an original resident carrier to an MBMS dedicated carrier according to the method.
  • the subscription UE can be moved back from the MBMS dedicated carrier to the original resident carrier.
  • the apparatus shown in FIG. 6 is proposed by the apparatus shown in FIG. 5. Based on the apparatus shown in FIG. 4, the cell reselection unit 61 is added, and the same can be achieved, and the description will not be repeated here.
  • a device for implementing carrier migration also proposes a corresponding device for supporting MBMS service charging.
  • the network side does not notify the corresponding charging processing stop charging notification unit, and/or the indicating unit is configured to trigger the UE to the network side after the UE re-successfully re-resident
  • the delivery verification message is sent to indicate to the network side that the reception is not successful, and the network side is correctly charged.
  • stop charging notification unit and/or the indication unit are added, and the same can be achieved, and the description will not be repeated here.

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

Abstract

La présente invention concerne un procédé de transfert de la porteuse dans un système MBMS qui se déroule de la manière suivante: lorsque UE sait que le système MBMS souscrit par UE est envoyé par le côté réseau et que UE obtient des informations de description du système MBMS, s'il existe une indication de transfert dans les informations de description du système MBMS, alors UE détermine si le transfert de la porteuse est effectué conformément à une politique de transfert; si UE décide d'effectuer le transfert de la porteuse alors le transfert vers la porteuse spécifiée est effectué dans le système MBMS conformément aux informations de paramètres radio des informations de description du système MBMS et le processus de réception du service du système MBMS est exécuté. Cette invention porte également sur un dispositif permettant de transférer la porteuse dans le système MBMS. Le procédé et le dispositif selon l'invention sont utilisés pour effectuer le transfert entre une porteuse hybride et une porteuse spécifiée, la personne qualifiée dans le domaine pouvant effectuer le transfert entre une porteuse hybride et une porteuse spécifiée conformément au procédé et au dispositif.
PCT/CN2008/070315 2007-02-15 2008-02-15 Procédé et dispositif de transfert de porteuse dans un système mbms WO2008101440A1 (fr)

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CN200710063980A CN100579316C (zh) 2007-02-15 2007-02-15 多媒体广播和组播业务中载波迁移的方法和装置
CN200710063980.X 2007-02-15

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CN101478737B (zh) * 2008-12-30 2010-10-27 华为技术有限公司 一种业务迁移的方法、装置和系统
CN102487480B (zh) * 2010-02-12 2016-03-30 华为技术有限公司 一种传输多媒体广播组播mbms业务的载波的选择方法、装置
US9332526B2 (en) * 2011-10-28 2016-05-03 Qualcomm Incorporated Discovering an evolved multicast broadcast multimedia service in single or dual band LTE
US9930587B2 (en) 2015-09-18 2018-03-27 Huawei Technologies Co., Ltd. Distributed virtual gateways
US10645528B2 (en) 2015-09-18 2020-05-05 Huawei Technologies Co., Ltd. System and methods for reliable communication with mobility along a predictable route
WO2018069848A1 (fr) 2016-10-11 2018-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Type de porteuse mbms dans des informations système
US11165445B2 (en) 2017-02-06 2021-11-02 Telefonaktiebolaget Lm Ericsson (Publ) Concatenated polar code with adaptive error detection
CN110022197B (zh) * 2018-01-10 2022-03-25 维沃移动通信有限公司 参考信号的处理方法、网络设备和终端

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WO2006011164A1 (fr) * 2004-07-27 2006-02-02 Telecom Italia S.P.A. Emission de contenu multimedia a une pluralite d'utilisateurs mobiles
CN1905694A (zh) * 2005-07-27 2007-01-31 华为技术有限公司 多媒体广播/组播服务业务发送方法和接收方法

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CN1496138A (zh) * 2002-08-16 2004-05-12 ���ǵ�����ʽ���� 在移动通信系统中发送/接收控制消息的方法
WO2006011164A1 (fr) * 2004-07-27 2006-02-02 Telecom Italia S.P.A. Emission de contenu multimedia a une pluralite d'utilisateurs mobiles
CN1905694A (zh) * 2005-07-27 2007-01-31 华为技术有限公司 多媒体广播/组播服务业务发送方法和接收方法

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