CN107454573B - Simulcast method and device based on SC-PTM - Google Patents
Simulcast method and device based on SC-PTM Download PDFInfo
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- CN107454573B CN107454573B CN201610381650.4A CN201610381650A CN107454573B CN 107454573 B CN107454573 B CN 107454573B CN 201610381650 A CN201610381650 A CN 201610381650A CN 107454573 B CN107454573 B CN 107454573B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The invention provides a simulcasting method and a simulcasting device based on SC-PTM, wherein the method comprises the following steps: establishing connection between a cell/multicast coordination entity MCE and each base station; the MCE configures SC-PTM simulcast resource pools for the cells corresponding to the base stations; the MCE sends the list information of the SC-PTM simulcast resource pool to each base station; the list information comprises cell identification, corresponding relation between service type and identification of the SC-PTM simulcast resource pool, and is used for indicating each base station to carry out resource scheduling on the service of each cell according to the list information, so that the cells corresponding to different base stations can also adopt an SC-PTM mode to send the MBMS service, SC-PTM simulcast between cells of cross base stations is realized, and a user is ensured to obtain diversity gain.
Description
Technical Field
The embodiment of the invention relates to the communication technology, in particular to a simulcasting method and a simulcasting device based on SC-PTM.
Background
Multimedia Broadcast/Multicast Service (MBMS) is an important feature introduced by the third Generation Partnership Project (3 GPP) organization in the version R6, and is a point-to-multipoint Service for simultaneously transmitting data from a data source to a plurality of users within a specific range.
In a Long Term Evolution (LTE) system, a Single Cell Point To multipoint (SC-PTM) mode is usually adopted To transmit an MBMS service. In the SC-PTM method, a simulcast area, a simulcast subframe, and a simulcast bandwidth are introduced in a downlink, and in order to obtain diversity gain for a user, each cell in the entire simulcast area transmits the same MBMS service signal on the same transport block using the same air interface resource and Modulation and Coding Scheme (MCS) within the simulcast bandwidth of one simulcast subframe.
However, the above-mentioned sending of the MBMS service by using the SC-PTM method can only be implemented in each cell under one base station, and there is no corresponding protocol for the area range crossing the base stations to support, so that the MBMS service cannot be sent by using this method between different base stations, which results in a simulcast failure between cells of different base stations, and thus users cannot obtain diversity gain.
Disclosure of Invention
The embodiment of the invention provides a simulcasting method and a simulcasting device based on SC-PTM, which can ensure that cells corresponding to different base stations can also adopt the SC-PTM mode to send MBMS service, thereby realizing SC-PTM simulcasting between cells of cross base stations and ensuring that users acquire diversity gain.
An embodiment of the present invention provides a simulcasting method based on SC-PTM, including:
establishing connection between a cell/multicast coordination entity MCE and each base station;
the MCE configures SC-PTM simulcast resource pools for the cells corresponding to the base stations;
the MCE sends the list information of the SC-PTM simulcast resource pool to each base station; the list information comprises corresponding relations among cell identifications, service types and the identifications of the SC-PTM simulcast resource pool, and is used for indicating each base station to carry out resource scheduling on the services of each cell according to the list information.
In an embodiment of the present invention, the establishing, by the MCE, a connection with each of the base stations includes:
the MCE receives capability information sent by a first base station; the capability information comprises SC-PTM simulcast identification, identification ID of each cell supported by the first base station and antenna port number; the SC-PTM simulcast identification is used for indicating that the first base station supports a simulcast mode of SC-PTM;
and the MCE determines the positions of the common pilot signals corresponding to the cells supported by the first base station according to the IDs of the cells supported by the first base station and the number of antenna ports, so that the MCE avoids the resource blocks where the positions of the common pilot signals corresponding to the cells are located when the SC-PTM simulcast resource pool is configured.
In an embodiment of the present invention, the capability information further includes a hot spot area list supported by the first base station, where the hot spot area list includes an identifier of at least one cluster hot spot area;
after the MCE receives the capability information sent by the first base station, the method further includes:
and the MCE sends the ID of each cell and the number of antenna ports in the cluster hotspot area corresponding to the hotspot area list to the first base station.
In an embodiment of the present invention, the method further includes:
the MCE sends the identification ID and the number of antenna ports of each cell supported by the first base station to a second base station; the second base station is a base station which establishes connection with the MCE before the first base station.
In an embodiment of the present invention, the configuring, by the MCE, an SC-PTM simulcast resource pool for each cell includes:
and the MCE configures the identification, the time domain position, the frequency domain position and the demodulation mode of the SC-PTM simulcast resource pool.
In an embodiment of the present invention, the method further includes:
the MCE receives the QoS and a cell list of a new service sent by a core network;
the MCE determines the SC-PTM simulcast resource pool for the new service according to the QoS and the cell list and updates the list information;
and the MCE sends the SC-PTM simulcast identification and the updated list information to each base station.
Another embodiment of the present invention further provides a simulcast apparatus based on SC-PTM, including:
the establishing module is used for establishing connection with each base station;
a configuration module, configured to configure an SC-PTM simulcast resource pool for a cell corresponding to each of the base stations;
a sending module, configured to send the list information of the SC-PTM simulcast resource pool to each base station; the list information comprises corresponding relations among cell identifications, service types and the identifications of the SC-PTM simulcast resource pool, and is used for indicating each base station to carry out resource scheduling on the services of each cell according to the list information.
In an embodiment of the present invention, the establishing module is specifically configured to receive capability information sent by a first base station; determining the positions of the common pilot signals corresponding to the cells supported by the first base station according to the IDs of the cells supported by the first base station and the number of antenna ports, so that the configuration module avoids the resource blocks where the positions of the common pilot signals corresponding to the cells are located when the SC-PTM simulcast resource pool is configured; the capability information comprises SC-PTM simulcast identification, identification ID of each cell supported by the first base station and antenna port number; the SC-PTM simulcast identification is used for indicating that the first base station supports the simulcast mode of SC-PTM.
In an embodiment of the present invention, the capability information further includes a hot spot area list supported by the first base station, where the hot spot area list includes an identifier of at least one cluster hot spot area;
the sending module is further configured to send each cell ID and the number of antenna ports in the cluster hotspot area corresponding to the hotspot area list to the first base station.
In an embodiment of the present invention, the sending module is further configured to send an identifier ID and a number of antenna ports of each cell supported by the first base station to a second base station; the second base station is a base station which establishes connection with the MCE before the first base station.
In an embodiment of the present invention, the configuration module is specifically configured to configure an identifier, a time domain position, a frequency domain position, and a demodulation manner of the SC-PTM simulcast resource pool.
In an embodiment of the present invention, the apparatus further includes:
the receiving module is used for receiving the QoS and the cell list of the new service sent by the core network;
the configuration module is also used for determining the SC-PTM simulcast resource pool for the new service according to the QoS and the cell list and updating the list information;
the sending module is further configured to send the SC-PTM simulcast identifier and the updated list information to each of the base stations.
In the simulcasting method and apparatus based on SC-PTM provided in this embodiment, after the MCE establishes connection with each base station, the MCE configures an SC-PTM simulcasting resource pool for a cell under each base station, and sends list information of the SC-PTM simulcasting resource pool including a correspondence between a cell identifier, a service type, and an identifier of the SC-PTM simulcasting resource pool to each base station, so that each base station performs resource scheduling on a service of each cell according to the list information.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a simulcasting method based on SC-PTM according to an embodiment of the present invention;
fig. 2 is a flowchart of a simulcasting method based on SC-PTM according to a second embodiment of the present invention;
fig. 3 is a flowchart of a simulcasting method based on SC-PTM according to a third embodiment of the present invention;
fig. 4 is a structural diagram of an SC-PTM based simulcast apparatus according to a fourth embodiment of the present invention;
fig. 5 is a block diagram of an SC-PTM based simulcast apparatus according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a simulcasting method based on SC-PTM according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
In this embodiment, the MCE negotiates with the base station to establish a connection, for example, the base station sends a notification message to the MCE, so that the MCE knows whether the base station supports SC-PTM and other information.
Step 102, the MCE configures SC-PTM simulcast resource pool for the cell under each base station.
The SC-PTM simulcast resource pool is a resource pool formed by a plurality of resource blocks which are continuous in time domain and frequency domain, and the configuration of the SC-PTM simulcast resource pool of each cell is the same in the same hotspot area, namely, the cells corresponding to different base stations can use the same SC-PTM simulcast resource. The MCE can configure the SC-PTM simulcast resource pool when the MCE establishes connection with each base station for initialization, and can also modify the configuration of the SC-PTM simulcast resource pool when the MCE discovers service change.
In this embodiment, the MCE may be connected to a plurality of base stations for communication, and the MCE configures an SC-PTM simulcast resource pool for cells corresponding to each base station connected to the MCE, so as to perform SC-PTM simulcast between cells corresponding to different base stations.
In this embodiment, the MCE sends the list information of the SC-PTM simulcast resource pool to each base station, so that each base station performs resource scheduling on the service of each cell according to the list information of the SC-PTM simulcast resource pool. The base station determines the corresponding SC-PTM simulcast resource pool identification according to the cell identification and the service type which need to carry out resource scheduling, and finds out the corresponding SC-PTM simulcast resource pool according to the identification of the SC-PTM simulcast resource pool, and carries out resource scheduling on the service in the SC-PTM simulcast resource pool.
It should be noted that resource blocks of different SC-PTM simulcast resource pools cannot overlap with each other, and when a resource in a certain SC-PTM simulcast resource pool is idle, it can be scheduled by a Physical Downlink Shared Channel (PDSCH for short) to be used by other unicast services, but the resource in the SC-PTM simulcast resource pool used by the unicast is used, and under the condition that the SC-PTM simulcast service is used, it is necessary to preferentially schedule the resource in the SC-PTM simulcast resource pool used by the unicast service to be used by the SC-PTM simulcast service, and call other idle resources to be used by the unicast service.
In the simulcasting method based on SC-PTM provided in this embodiment, after the MCE establishes connection with each base station, the MCE configures an SC-PTM simulcasting resource pool for a cell under each base station, and sends list information of the SC-PTM simulcasting resource pool including a correspondence between a cell identifier, a service type, and an identifier of the SC-PTM simulcasting resource pool to each base station, so that each base station performs resource scheduling on a service of each cell according to the list information.
Fig. 2 is a flowchart of an SC-PTM-based simulcasting method according to a second embodiment of the present invention, which relates to a specific implementation manner of step 101, and as shown in fig. 2, the method includes the following steps:
In this embodiment, taking the first base station as an example, when the first base station establishes a connection with the MCE, the first base station sends capability information to the MCE, and if the capability information includes an SC-PTM simulcast identifier, it indicates that the first base station supports an SC-PTM simulcast mode, and the capability information further includes an identifier ID and an antenna port number of each cell corresponding to the first base station.
Optionally, the capability information further includes a hot spot area list supported by the first base station, where the hot spot area list includes an identifier of at least one cluster hot spot area. Step 202 may also be included after step 201.
In this embodiment, the MCE may further send the cell ID and the number of antenna ports corresponding to other base stations connected to the MCE in the cluster hotspot area to the first base station, so that SC-PTM simulcasting is achieved between the first base station and each cell corresponding to other base stations.
Step 203, the MCE determines the position of the common pilot signal corresponding to each cell supported by the first base station according to the ID of each cell supported by the first base station and the number of antenna ports, so that the MCE avoids the resource block where the position of the common pilot signal corresponding to each cell is located when configuring the SC-PTM simulcast resource pool.
In this embodiment, the ID and the number of antenna ports of each cell determine the position of the common pilot signal of each cell, and for SC-PTM, the subframe corresponding to the position of the common pilot signal of a cell cannot be scheduled, so the position of the common pilot signal of each cell needs to be avoided when the SC-PTM simulcast resource pool is configured.
Optionally, the method may further include step 204, specifically as follows:
In this embodiment, the MCE may further send the identifier ID and the number of antenna ports of each cell supported by the first base station to the second base station, that is, the MCE sends the identifier ID and the number of antenna ports of each cell supported by the newly added base station to the other base stations that have established connection with the MCE, so that SC-PTM simulcasting may be implemented between each cell corresponding to the newly added base station and the other base stations.
It should be noted that, in the present embodiment, the execution order of the steps 202, 203, and 204 is not limited.
In the SC-PTM based simulcasting method provided in this embodiment, the MCE receives capability information including an SC-PTM simulcasting identifier, an identifier ID of each cell supported by the first base station, and a number of antenna ports, which is sent by the first base station, and determines a location of a common pilot signal corresponding to each cell supported by the first base station according to each cell ID and the number of antenna ports supported by the first base station, so that the MCE avoids a resource block where the location of the common pilot signal corresponding to each cell is located when configuring an SC-PTM simulcasting resource pool, so that the cells corresponding to different base stations can also send an MBMS service in an SC-PTM manner, thereby ensuring that a user obtains diversity gain, and when the capability information further includes a hot spot area list supported by the first base station, the MCE sends each cell ID and the number of antenna ports in a cluster hot spot area corresponding to the hot spot area list to the first base station, and the identification ID and the number of antenna ports of each cell supported by the first base station can be sent to the second base station, so that SC-PTM simulcasting can be realized between the newly added base station and each cell corresponding to other base stations, and the reliability of SC-PTM simulcasting is ensured.
Optionally, the MCE configures an SC-PTM simulcast resource pool for each cell, including: and the MCE configures the identification, the time domain position, the frequency domain position and the demodulation mode of the SC-PTM simulcast resource pool.
In this embodiment, the identifier of the SC-PTM simulcast resource pool is used to indicate different SC-PTM simulcast resource pools; the time domain position comprises a subframe starting position, a length and a repetition period; the frequency domain position comprises an RB starting position, the length of a Resource Block (RB for short) or the ending position of the RB; and the demodulation modes of all the cells corresponding to the same SC-PTM simulcast resource pool are consistent.
Fig. 3 is a flowchart of an SC-PTM-based simulcast method according to a third embodiment of the present invention, which relates to a specific process how to associate a new service with an SC-PTM simulcast resource pool when there is a new service. As shown in fig. 3, the method comprises the steps of:
In this embodiment, when a new service is triggered, the MCE receives a quality of service QoS of the new service sent by a core network and a cell list, where the cell list includes a cell identifier related to the new service.
In this embodiment, the MCE associates the new service to an appropriate SC-PTM simulcast resource pool according to the QoS of the new service and the cell list, and updates the list information of the SC-PTM simulcast resource pool.
In this embodiment, the MCE sends the SC-PTM simulcast identifier and the updated list information to each base station to notify each base station whether to use SC-PTM simulcast, and to notify the base station of the related information of the SC-PTM simulcast resource pool corresponding to the new service, so that the base station performs resource scheduling on the new service in the corresponding SC-PTM simulcast resource pool.
Optionally, the base station may further send information of an adjacent cell of the simulcast area to a User Equipment (User Equipment, UE for short), when the service is switched from the current cell to the adjacent cell, the UE may determine whether the adjacent cell is the simulcast cell according to the information of the adjacent cell, and if the adjacent cell is the simulcast cell, the unicast does not need to be initiated again in the adjacent cell, but the SC-PTM simulcast resource pool is directly used for scheduling the service.
In the simulcasting method of SC-PTM provided in this embodiment, the MCE receives the QoS and the cell list of the new service sent by the core network, determines an SC-PTM simulcasting resource pool for the new service according to the QoS and the cell list, updates the list information, and sends the SC-PTM simulcasting identifier and the updated list information to each base station, so that the cell corresponding to each base station performs resource scheduling on the new service in the corresponding SC-PTM simulcasting resource pool, thereby ensuring that the SC-PTM simulcasting of the new service is realized between the cells corresponding to different base stations, and enabling the user to obtain a larger diversity gain.
Fig. 4 is a structural diagram of an SC-PTM-based simulcast apparatus according to a fourth embodiment of the present invention, as shown in fig. 4, the apparatus includes a setup module 11, a configuration module 12, and a sending module 13. The establishing module 11 is used for establishing connection with each base station; the configuration module 12 is configured to configure an SC-PTM simulcast resource pool for a cell corresponding to each base station; the sending module 13 is configured to send the list information of the SC-PTM simulcast resource pool to each base station; the list information comprises corresponding relations among cell identifications, service types and identifications of SC-PTM simulcast resource pools, and is used for indicating each base station to carry out resource scheduling on the services of each cell according to the list information.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.
Further, the establishing module 11 is specifically configured to receive capability information sent by the first base station; determining the position of a common pilot signal corresponding to each cell supported by the first base station according to the ID of each cell supported by the first base station and the number of antenna ports, so that a configuration module avoids a resource block where the position of the common pilot signal corresponding to each cell is located when configuring an SC-PTM simulcast resource pool; the capability information comprises SC-PTM simulcast identification, identification ID of each cell supported by the first base station and antenna port number; the SC-PTM simulcast identification is used for indicating that the first base station supports the simulcast mode of SC-PTM.
Optionally, the capability information further includes a hot spot area list supported by the first base station, where the hot spot area list includes an identifier of at least one cluster hot spot area; the sending module 13 is further configured to send each cell ID and the number of antenna ports in the cluster hotspot area corresponding to the hotspot area list to the first base station.
Optionally, the sending module 13 is further configured to send the identifier ID and the number of antenna ports of each cell supported by the first base station to the second base station; the second base station is a base station which establishes a connection with the MCE before the first base station.
Still further, the configuration module 12 is specifically configured to configure the identifier, the time domain position, the frequency domain position, and the demodulation mode of the SC-PTM simulcast resource pool.
Fig. 5 is a structural diagram of an SC-PTM-based simulcasting apparatus according to a fifth embodiment of the present invention, as shown in fig. 5, the apparatus further includes a receiving module 14, where the receiving module 14 is configured to receive a quality of service QoS and a cell list of a new service sent by a core network; the configuration module 12 is further configured to determine an SC-PTM simulcast resource pool for the new service according to the QoS and the cell list, and update list information; the sending module 13 is further configured to send the SC-PTM simulcast identifier and the updated list information to each base station.
The apparatus of this embodiment may be configured to execute the technical solution shown in any one of the method embodiments in fig. 1 to 3, and the implementation principle and the technical effect are similar, which are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media capable of storing program codes, such as Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk, or optical disk.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A simulcasting method based on point-to-multipoint SC-PTM, comprising:
establishing connection between a cell/multicast coordination entity MCE and each base station;
the MCE configures SC-PTM simulcast resource pools for the cells corresponding to the base stations;
the MCE sends the list information of the SC-PTM simulcast resource pool to each base station; the list information comprises cell identifiers, corresponding relations between service types and the identifiers of the SC-PTM simulcast resource pools, and is used for indicating each base station to carry out resource scheduling on the services of each cell according to the list information;
the MCE establishes connection with each base station, and the connection comprises the following steps:
the MCE receives capability information sent by a first base station; the capability information comprises SC-PTM simulcast identification, identification ID of each cell supported by the first base station and antenna port number; the SC-PTM simulcast identification is used for indicating that the first base station supports a simulcast mode of SC-PTM;
and the MCE determines the positions of the common pilot signals corresponding to the cells supported by the first base station according to the IDs of the cells supported by the first base station and the number of antenna ports, so that the MCE avoids the resource blocks where the positions of the common pilot signals corresponding to the cells are located when the SC-PTM simulcast resource pool is configured.
2. The method of claim 1, wherein the capability information further comprises a hot spot area list supported by the first base station, wherein the hot spot area list comprises an identifier of at least one cluster hot spot;
after the MCE receives the capability information sent by the first base station, the method further includes:
and the MCE sends the ID of each cell and the number of antenna ports in the cluster hotspot area corresponding to the hotspot area list to the first base station.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
the MCE sends the identification ID and the number of antenna ports of each cell supported by the first base station to a second base station; the second base station is a base station which establishes connection with the MCE before the first base station.
4. The method according to any of claims 1-2, wherein the MCE configures an SC-PTM simulcast resource pool for each cell, comprising:
and the MCE configures the identification, the time domain position, the frequency domain position and the demodulation mode of the SC-PTM simulcast resource pool.
5. The method according to any one of claims 1-2, further comprising:
the MCE receives the QoS and a cell list of a new service sent by a core network;
the MCE determines the SC-PTM simulcast resource pool for the new service according to the QoS and the cell list and updates the list information;
and the MCE sends the SC-PTM simulcast identification and the updated list information to each base station.
6. A simulcasting apparatus based on point-to-multipoint SC-PTM, applied to a cell/multicast coordination entity MCE, comprising:
the establishing module is used for establishing connection with each base station;
a configuration module, configured to configure an SC-PTM simulcast resource pool for a cell corresponding to each of the base stations;
a sending module, configured to send the list information of the SC-PTM simulcast resource pool to each base station; the list information comprises cell identifiers, corresponding relations between service types and the identifiers of the SC-PTM simulcast resource pools, and is used for indicating each base station to carry out resource scheduling on the services of each cell according to the list information;
the establishing module is specifically used for receiving the capability information sent by the first base station; determining the positions of the common pilot signals corresponding to the cells supported by the first base station according to the IDs of the cells supported by the first base station and the number of antenna ports, so that the configuration module avoids the resource blocks where the positions of the common pilot signals corresponding to the cells are located when the SC-PTM simulcast resource pool is configured; the capability information comprises SC-PTM simulcast identification, identification ID of each cell supported by the first base station and antenna port number; the SC-PTM simulcast identification is used for indicating that the first base station supports the simulcast mode of SC-PTM.
7. The apparatus of claim 6, wherein the capability information further comprises a hot spot area list supported by the first base station, wherein the hot spot area list comprises an identification of at least one cluster hot spot;
the sending module is further configured to send each cell ID and the number of antenna ports in the cluster hotspot area corresponding to the hotspot area list to the first base station.
8. The apparatus according to claim 6 or 7, wherein the sending module is further configured to send an identification ID and the number of antenna ports of each cell supported by the first base station to a second base station; the second base station is a base station which establishes connection with the MCE before the first base station.
9. The apparatus according to any of claims 6-7, wherein the configuration module is specifically configured to configure an identity, a time domain location, a frequency domain location, and a demodulation manner of the SC-PTM simulcast resource pool.
10. The apparatus of any of claims 6-7, further comprising:
the receiving module is used for receiving the QoS and the cell list of the new service sent by the core network;
the configuration module is also used for determining the SC-PTM simulcast resource pool for the new service according to the QoS and the cell list and updating the list information;
the sending module is further configured to send the SC-PTM simulcast identifier and the updated list information to each of the base stations.
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| CN102577447A (en) * | 2009-09-11 | 2012-07-11 | 夏普株式会社 | Wireless communication system, base station apparatus, mobile station apparatus, and communication method |
| WO2015115825A1 (en) * | 2014-01-29 | 2015-08-06 | Lg Electronics Inc. | Method and apparatus for transmitting report message in wireless communication system |
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