RU2393634C2 - Transmission and acceptance of multipoint service information - Google Patents

Abstract

FIELD: information technologies.

SUBSTANCE: among multiple multipoint control channels of "point - multiple points" type, provided by cell, a separate multipoint control channel of "point - multiple points" type is selected in accordance with preferable method of acceptance of multipoint service of "point - multiple points" type. At the same time control information related to specified multipoint service is accepted through selected multipoint control channel of "point-multiple points" type, and then specified multipoint service of "point - multiple points" type is accepted in compliance with this control information.

EFFECT: provision of multiple-address service of point - multiple points type in system of wireless communication.

40 cl, 7 dwg

Description

[1] The present invention relates to data transmission of a point-to-multipoint multipoint service.

[2] Figure 1 shows a typical structure of an evolving (expanded) universal mobile communication system "E-UMTS", which is one of the types of mobile communication systems.

[3] The developing (expanded) universal mobile communication system “E-UMTS” was developed in the development of the universal mobile communication system “UMTS”, for which the 3GPP technical group prepares the main specifications applicable to it. The E-UMTS system can be attributed to the LTE system - long-term evolutionary development.

[4] As shown in figure 1, the network of the developing universal mobile communication system "E-UMTS" is divided into a network of 20 "E-UTRAN" (developing terrestrial radio access network of the system "E-UMTS") and cell 10 "EPC" (Evolved Packet Core - an emerging packet-switched network). Network 20 "E-UTRAN" contains a base station 21 (node "eNB" or node "eNode B"). The access gateway 11 "AG" (which may also be referred to as the mobility management module "MME / user plane module" UPE ") may also consist of a node for processing the user data stream and a node for processing the control data stream. The part of the access gateway node “AG”, designed to process the new user data stream, and the part of the access gateway node “AG”, designed to process the control data stream, can exchange data with each other via a newly defined interface.

[5] One or more cells may exist in one eNode B (eNB) 21 base station, and an interface may be used between the eNode B base stations for transmitting a user data stream and a control data stream.

[6] The EPC network 10 may comprise an access gateway 11 “AG”, a user registration node of a “UE” terminal, and the like. In addition, in the terrestrial radio access network of the UMTS system shown in FIG. 1, an interface may be used that interconnects the E-UTRAN 20 ground network 20 and the EPC network 10. The “S1” interface can connect multiple nodes (for example, according to the “point to multiple points” scheme) of base stations 21 “eNode B” and access gateways 11 “AG”. The “eNode B” base stations are connected to each other using the “X2” interface, which is always present between adjacent “eNode B” base stations in the structure of the cellular network.

[7] Figure 2 shows a typical structure (architecture) of the E-UTRAN network. Here, the base station "eNB" in the active state "LTE_ACTIVE" can perform the functions of selecting an access gateway (AG / aGW), routing with respect to the access gateway "AG / aGW" during activation of radio resource control (RRC), distribution and transmission of paging messages, distribution and transmission of broadcast channel information (BCCH), dynamic allocation of resources to UE subscriber devices in upstream and downstream channels, configuration and provision of measurements for eNB base stations, control of unidirectional radio channels, control Establishment of a RAC radio link and link mobility management.

[8] In the E-UTRAN network, the AG access gateway can perform the functions of initiating a paging call, LTE-IDLE idle control, user plane encryption, supporting the PDCP packet data convergence (convergence) protocol function, control channel using technology "SAE" (System Architecture Evolution - "Evolution of system architecture") and encryption and integrity protection layer signaling without access "NAS".

[9] Figures 3 and 4 show the sets (stacks) of user plane protocols and control plane protocols for the E-UTRAN network. Here, the protocol layers can be divided into a first layer (L1), a second layer (L2), and a third layer (L3), based on the three lower layers of the standard Open Systems Interconnection (OSI) model, well known in communications technology.

[10] The physical layer, which is the first layer, provides a service for transmitting information to an upper layer using a physical channel. The physical layer is connected to the MAC access control layer (located in the upper layer) through the transport channel, and data between the MAC access control layer and the physical layer is transmitted through this transport channel. Between different physical layers, namely, between physical layers on the transmission side and on the receiving side, data is transmitted on the physical channel.

[11] The Layer 2 MAC (L2) medium access control layer provides services to the RLC radio link control layer (which is an upstream layer) over a logical channel. The Layer 2 Layer (RLC) radio link control layer supports data transmission with high reliability. It should be borne in mind that the control level of the radio channel "RLC" in Figs. 3 and 4 is shown in dashed lines, because if the functions of the RLC radio channel control level are implemented in the MAC access control level and are performed by it, then it is not necessary to have a separate RLC radio channel control level.

[12] The Layer 2 Layer (PD2) packet data convergence protocol layer performs a header compression function that reduces unnecessary control information so that data transmitted using Internet Protocol (IP) packets, such as IPv4 or IPv6, can be efficiently sent over a radio interface (wireless interface) having a relatively small bandwidth.

[13] The RRC radio resource control layer located at the bottom of the third level (L3) is defined only in the control plane and controls the logical channels, transport channels, and physical channels with respect to configuring, reconfiguring, and releasing the RB unidirectional radio channels. Here, the RB channel means the service provided by the second layer (L2) for data transmission between the terminal and the UTRAN terrestrial network.

[14] Figure 3 - the level of control of the radio channel "RLC" and the level of access control to the medium "MAC" (ending in the node "eNB" on the network side) can perform such functions as scheduling (distribution), automatic request for replay ARQ "and hybrid automatic repeat request" HARQ ". The packet data convergence protocol layer “PDCP” (ending in the “aGW” access gateway on the network side) can perform user plane functions such as header compression, data integrity protection, and encryption.

[15] Figure 4 - the level of control of the radio channel "RLC" and the level of access control to the medium "MAC" (ending in the node "eNB" on the network side) perform the same functions as for the user plane. Here, the RRC radio resource control level (ending in the eNB node on the network side) can perform such functions as broadcast transmission, paging, establishing a connection between radio resource control levels - RRC connection, controlling the RB radio bearer, mobility functions , and the issuance of a report on the measurements of the subscriber device and control. The packet data convergence protocol layer “PDCP” (ending in the “aGW” access gateway on the network side) can perform user plane functions such as data integrity protection and encryption. A layer without NAS access (ending in aGW access gateway on the network side) can perform such functions for the control plane as setting the channel of the SAE system, authentication, processing mobility in standby mode, initiating a paging in standby mode LTE_IDLE ”And signaling security management between the“ aGW ”access gateway and the“ UE ”terminal, as well as functions for the user plane.

[16] A non-NAS layer can be divided into three different states. The first state is “LTE_DETACHED” (the connection is interrupted) - when there is no “RRC” radio resource control object in the layer without NAS access; the second state “LTE_IDLE” (standby / idle mode) - when there is no “RRC connection” with minimal information from the terminal “UE”; and the third state is “LTE_ACTIVE” (active) when the “RRC connection” is established. The radio resource control state “RRC” can also be divided into two different states - “RRC_IDLE” (standby) and “RRC_CONNECTED” (connected). In the RRC_IDLE state, the UE can receive broadcast system information and search information, while the UE performs discontinuous DRX reception configured by the non-NAS layer, and the ID is assigned to the UE , which uniquely identifies the terminal "UE" in the area tracking location. In the “RRC-IDLE” state, no “RRC” radio resource management context is stored in the “eNB”. In the RRC_CONNECTED state, the UE terminal has an RRC connection with the E-UTRAN terrestrial network and the context in the E-UTRAN terrestrial network so that it becomes possible to transmit data to the network (base station / eNB node) ) and receiving data from the network. In addition, the UE may transmit channel quality information and feedback information to the eNB. In the RRC_CONNECTED state, the E-UTRAN terrestrial network knows the cell to which the UE terminal belongs, so the network can transmit data to the terminal and receive data from the UE terminal, can control mobility (handover / transition - transfer of the subscriber connection ) terminal "UE", can perform measurements of cell parameters for the neighboring cell.

[17] In the "RRC-IDLE" mode, the terminal "UE" performs a discontinuous reception cycle "DRX" paging. That is, the UE monitors the paging signal in a particular paging event in each intermittent paging reception DRX cycle. A paging event is a time interval when a paging signal is transmitted. The UE has its own paging cause. A paging message is transmitted across all cells belonging to the same service area. If the UE moves from one zone to another location, then to update its location, the UE sends a message to the network to update the location tracking zone.

[18] Figure 5 shows a typical structure of a physical channel. The physical channel transmits signaling and data between the first level of the terminal “UE” (L1) and the first level of the node “eNB” (L1). As shown in FIG. 5, a physical channel transmits signaling and data using radio resources, which consist of one or more subcarriers (frequencies) in frequency and one or more characters in time (i.e., 6 or 7 characters make up one subframe having 0.5 ms length). The specific symbol (s) of the subframe (e.g., the first symbol of the subframe) may be used for the control channel of the L1 / L2 levels. The control channel of the L1 / L2 levels carries control information (signaling) of the L1 / L2 levels.

[19] Figure 6 shows a possible mapping between logical and transport channels. Typically, a transport channel transmits signaling and data between L1 and MAC access control layers, and the physical channel is mapped to the transport channel. The types of downlink transport channels can be described as follows.

1. Broadcast channel "VSN" used to transmit system information; 2. Downlink shared channel (DL-SCH), characterized by: a) support for hybrid automatic HARQ repeat requests, b) support for dynamic adaptation of the communication line by changing modulation, coding and transmit power, c) the ability to broadcast throughout the cell, d) the ability to use beamforming; and e) support for both dynamic and pseudostatic (semi-static) resource allocation; 3. Channel search call (paging channel) used for the search terminal "UE"; and 4. The MCH multicast channel used to transmit a multicast or broadcast service. Types of uplink transport channels can be described as follows: 1. UL-SCH uplink shared channel, characterized by: a) the ability to use beamforming (most likely without affecting the technical characteristics), b) support for dynamic adaptation of the communication line by changing transmit power and, potentially, modulation and coding, and c) support for HARQ requests; 2. Channel (s) with random access "RACH", usually used for initial access to the cell.

[20] Typically, the MAC access control layer provides data services over logical channels. The set of types of logical channels is determined for various types of data services, as proposed by the MAC access control layer. Each type of logical channel is determined by the type of information transmitted. For example, logical channels are classified into two groups: control channels (for transmitting information in the control plane) and graph channels (for transmitting information in user wear). Control channels are used to transmit only control plane information. A few examples of control channels offered by the MAC access control layer are: 1. The BCCN broadcast control channel, which is a downstream channel for broadcasting system control information; 2. The paging control channel "RCCN", which is a downstream channel that transmits search information. This channel is used when the network does not know the location cell of the subscriber unit; 3. The common control channel "CCCH", which is used by the terminal "UE" when there is no "RRC connection" between the terminal "UE" and the network; 4. The multicast control channel "MSSN", which is a multi-point downlink channel of the type "point - many points" used to transmit control information "MBMS" (multimedia broadcast / multicast service) from the network to the terminal "UE"; and 5. The dedicated DCCH control channel, which is a point-to-point bidirectional communication channel that transmits dedicated control information between the UE and the network. Channel "DCCH" is used by the terminal "UE" having a "RRC connection".

[21] The channels of the graph are used only for transmitting information in the plane of the user. Some examples of traffic channels provided by the MAC access control layer are: 1. DTCH dedicated traffic channel, which is a point-to-point direct communication channel allocated to one UE terminal for transmitting user information. The dedicated DTCH can be upstream and downstream; and 2. MTSN traffic multicast channel, which is a point-to-multipoint downlink multipoint communication channel for transmitting traffic data from the network to the UE terminal. Different logical channels are mapped to different transport channels. For example, in the upstream (forward) direction to the UL-SCH uplink shared channel, dedicated DCCH and DTCH channels may be displayed. Also, in the downstream direction, the paging control channel “PCCH” can be displayed on the “PCH” channel, the DCCH channel can be displayed on the “DL-SCH” and the traffic channel “DTCH” can be displayed on the “DL-SCH” channel.

[22] The inventors of the present invention recognize at least the following problems in the current point-to-multipoint multicast data transmission service. Namely, control information regarding certain services of a cell and relatively non-specific services for a cell is provided via one control channel of the “point-to-many-point” type, i.e. MSCN multicast control channel. Therefore, signaling and scheduling of cell-specific and cell-specific services cannot be optimized in accordance with the characteristics of the services. For example, control information about a non-specific service can be combined for all cells, which saves radio resources. However, the control channel provides control information not only about non-specific, but also about a specific service. Therefore, the control channel cannot support combining, so that control information about a non-specific service cannot be combined. This leads to wasteful use of radio resources. Based on the understanding of this problem, the authors of the present invention have developed various features and aspects set forth in the present description.

[23] Disclosure of the essence of the present invention relates to the receipt of multicast services of the type "point - many points" in a wireless communication system.

[24] Additional aspects of examples of embodiments of the present invention will be set forth in the following description, and in part will be apparent from the description, or may be revealed by the practical embodiment of the embodiment (s) of implementation and their features. These aspects of the embodiments of the present invention can be realized and achieved using the structure partially presented in the present description and in the claims, as well as in the accompanying drawings.

[25] In order to achieve these properties in accordance with embodiments of the present invention that are disclosed and widely covered, features are implemented in a method for obtaining a point-to-multipoint multipoint service in a wireless communication system including selecting a point-multipoint control channel - many points ”from the set of multi-point control channels of the“ point-to-many points ”type provided by the cell, in which the multi-point control channel of the“ point-to-many points ”type is selected according to with the required (preferred) method of obtaining a multipoint service, receiving through the selected multipoint control channel of the point-to-many-type type multicast control information related to the multicast service of the type point-to-many points and receiving a multicast service like point-to-many points ”in accordance with this management information.

[26] In one aspect, a desired (preferred) method for obtaining a point-to-many-point communication service includes receiving a point-to-many-point communication service in a single cell. Control information containing scheduling information may be received on the control channel of the L1 / L2 levels. A peer-to-peer multicast service may be received on a downlink shared channel. The method may further include using a retransmission scheme based on uplink feedback. Control information containing scheduling information can be received from the base station - node "eNode B".

[27] In another aspect, a desired (preferred) method for obtaining a point-to-many-point multicast service includes receiving a point-to-many-point multicast service in a plurality of cells. Control information containing scheduling information can be received on the MBMS control channel (MCCN multicast control channel). A point-to-multi-point multicast service can be received on a multicast channel using the summation technique at the L1 level. Control information containing scheduling information can be obtained from a central node.

[28] According to another embodiment of the invention, a method for obtaining a point-to-many-point multicast service in a wireless communication system includes selecting a point-to-many-point multipoint control channel from a plurality of point-to-point control channels many points ”provided by the cell in which the point-to-point multipoint control channel is selected in accordance with the zone where the point-to-many-point type multicast service is provided, receiving by selected nth multi-point control channel of the type "point - many points" of control information related to this multicast service, and receiving a multicast service of the type "point - many points" in accordance with this control information.

[29] In one aspect, a point-to-many-point multicast service may be provided using a single cell. Control information containing scheduling information can be obtained on the control channel of the L1 / L2 levels. A point-to-multi-point multicast communication service may be received on a downlink shared channel. The method may further include using an uplink feedback retransmission scheme. Control information containing scheduling information can be obtained from the eNode B node.

[30] In another aspect, a point-to-many-point multicast service may be provided using multiple cells. Control information containing scheduling information can be obtained via the MBMS control channel (MCCH multicast control channel). A point-to-multi-point multicast service can be received on a multicast channel using the summation technique at the L1 level. Control information containing scheduling information can be obtained from the central node.

[31] In accordance with another embodiment of the invention, a method for transmitting a point-to-many-point multicast service in a wireless communication system includes providing a cell with a plurality of point-to-many-point multipoint control channels, transmitting control information to a mobile terminal via multi-point control channel of the type "point - many points" selected by this mobile terminal among the many multi-point control channels of the type "point - many points", and this multi-point control th channel is selected according to the desired (preferred) way transmission multicast service type "point - multipoint", and the transmission of this multicast service according to the control information.

[32] In one aspect, a desired (preferred) method for transmitting a point-to-many-point multicast service includes transmitting this point-to-many-point multicast service using a single cell. Control information containing scheduling information may be transmitted on the control channel of the L1 / L2 levels.

[33] A point-to-multi-point multicast service may be transmitted in a downlink shared channel. The method may further include using an uplink feedback based retransmission scheme. Control information containing scheduling information may be transmitted from the base station, the eNode B node.

[34] In another aspect, a desired (preferred) method for transmitting a point-to-many-point multicast service includes transmitting a point-to-many-point multicast service using multiple cells. Control information containing scheduling information may be transmitted on the MBMS control channel (MCCN multicast control channel). A point-to-multi-point multicast service can be transmitted over a multicast channel using the summarization technique at the L1 level. Control information containing scheduling information may be transmitted from a central node.

[35] In accordance with another embodiment of the invention, a method for transmitting a point-to-many-point multicast service in a wireless communication system includes providing a cell with a plurality of point-to-many-point multipoint control channels, transmitting control information to a mobile terminal via multi-point control channel of the type "point - many points" selected by this mobile terminal among the many multi-point control channels of the type "point - many points", and the multi-point control channel Al type "point - multipoint" chosen according to the area where the service is provided the multicast type "point - multipoint" transmission and multicast services such as "point - a lot of points," according to the control information.

[36] In one aspect, a point-to-many-point multicast service may be provided using a single cell. Control information containing scheduling information may be transmitted on the control channel of the L1 / L2 levels. A point-to-multi-point multicast service may be transmitted in a downlink shared channel. The method may further include using a retransmission scheme based on uplink feedback. Management information containing scheduling information may be transmitted from the eNode B node.

[37] In another aspect, a point-to-multiple-point multicast service may be provided using multiple cells. Control information containing scheduling information may be transmitted on the MBMS control channel (MCCN multicast control channel). A point-to-multi-point multicast service can be transmitted over a multicast channel using the summarization technique at the L1 level. Control information containing scheduling information may be transmitted from a central node.

[38] It should be understood that both the foregoing general description and the following detailed description of various features of the invention provide examples and explanations and are intended to further explain the claims.

[39]

[40] The accompanying drawings, which are included to provide further understanding and are an integral part of the present description, illustrate various typical embodiments of the present invention and, together with the description, serve to explain the principles set forth.

[41] Figure 1 shows a typical network structure of the developing (expanded) universal mobile communication system "E-UMTS".

[42] Figure 2 shows a typical structure of an E-UTRAN terrestrial network.

[43] Figure 3 shows a typical set (stack) of protocols of the plane of the user plane of the terrestrial network "E-UTRAN".

[44] Figure 4 shows a typical protocol stack (stack) of the E-UTRAN terrestrial network control plane.

[45] Figure 5 shows a typical structure of a physical channel.

[46] FIG. 6 shows a mapping between logical and transport channels.

[47] Figure 7 shows a typical method for obtaining a multicast service type "point - many points" in a wireless communication system.

[48]

[49] The present description relates to a point-to-multipoint multicast service in a wireless communication system.

[50] In accordance with one embodiment of the invention, there are two types of service scenarios for multicast / broadcast transmission - specific content for a single cell and the content of a group of cells. Specific content for a single cell includes cellular broadcasting services such as sending messages to specific cells that are implemented in a single cell transmission mode (single cell transmission). Cell group content includes broadcast services for multiple cells, such as broadcast television, that are implemented in multiple cell transmission mode (multi-cell transmission).

[51] In accordance with one embodiment of the invention, the transmission control of multiple cells (multi-cell transmission) and transmission of a single cell (single-cell transmission) is carried out differently from the point of view of transmission planning and summation (addition) of transmission. Scheduling a single cell transmission (single-cell transmission) can be done in the eNode B node, while scheduling multiple-cell transmission (multi-cell transmission) can be done by a central node, such as the aGW access gateway. In addition, single-cell transmission (single-cell transmission) can be performed on the DL-SCH downstream shared channel, while multiple-cell transmission (multicell transmission) can be performed on various channels, such as the MCH multicast, which can combine in level L1. However, single-cell transmission (single-cell transmission) can also be performed on the MCH multicast channel instead of the DL-SCH channel.

[52] In multi-cell transmission (multi-cell transmission), L1 layer summation technology may be used. Therefore, the central node “aGW” acts on the network as a transmission source in multiple cells. In this case, the transmission of the same service can be provided for a group of cells transmitting this service.

[53] In contrast, a single-cell transmission (single-cell transmission) cannot be combined through eNode B nodes, since a single-cell transmission (single-cell transmission) covers only one cell or one eNode B node. However, a single cell transmission (single cell transmission) can be combined in the same eNode B node if the network supports summation.

[54] A multi-cell transmission source is a central node, such as an aGW access gateway. The aGW node also plans to transmit multiple cells for a group of cells. To apply scheduling to a group of cells, the aGW node can use pseudostatic (semi-static) transmission scheduling by multiple cells. The scheduling information may be transmitted via in-band signaling on the MBMS control channel, such as the MBMS service scheduling channel (MSCH scheduling channel) mapped to the same physical channel that carries the MBMS schedule channel (MTSN channel) )

[55] For transmission by a single cell, instead of the “aGW” node, the base station (“eNode B” node) performs dynamic planning of transmission by a single cell, taking into account the distribution of unicast and other common channels. The eNode B may first distribute unicast data in accordance with the channel quality report, and then plans to transmit a single cell with downlink resources not allocated for unicast data. Scheduling information for transmission by a single cell may be transmitted by control information of L1 / L2 levels. The L1 / L2 control information may include an MBMS multimedia broadcast / multicast service identifier, as well as a UE (subscriber unit) identifier.

[56] Single cell transmission (single cell transmission) on the DL-SCH shared channel can support adaptive AMC modulation and coding and HARQ hybrid automatic repeat request schemes for a relatively small number of users receiving a multicast service. The level of automatic repeat requests "ARQ", providing the function of automatic request for repeat "ARQ" in the node "eNode B", can repeat the transmission of the same service packages "MBMS" or the same text / multimedia messages. Therefore, if the terminal “UE” (subscriber unit) loses one packet or message, later it may request a lost packet or message.

[57] The scheduling information in the control channel of the L1 / L2 levels for a certain time interval (for example, one or more transmission time intervals "TTI") indicates short-term planning information about the transmission of the MBMS service in this time interval. That is, if the “UE” terminal requests short-term planning information about the transmission of the “MBMS” service, which the “UE” wants to receive by receiving the control channel of the L1 / L2 levels in a certain time interval, then the “UE” receives the MBMS service traffic "Or control information for transmitting the MBMS service in this time interval by receiving a downlink resource (eg, time / frequency / code) indicated by the received short-term scheduling information.

[58] Moreover, the UE may receive from the cell long-term scheduling information related to the transmission of the MBMS service. Long-term scheduling information indicates when an MBMS service transmission is available. Accordingly, the UE receives the L1 / L2 control channel in the time interval indicated by the received long-term scheduling information in order to obtain short-term MBMS service transmission scheduling information.

[59] In accordance with one embodiment of the invention, the central node (“aGW” access gateway) transmits information related to the transmission of multiple cells (multi-cell transmission), for example, distribution / summation information, to the “eNode B” node for control transmissions of multiple cells. The “eNode B” node then transmits some control information received from the “aGW” central node either via the MCCN multicast control channel or via the “MSCH” planning channel. Therefore, the RRC radio resource control level at the aGW central node does not exist. The RRC radio resource control level at the eNode B can control multicast / broadcast transmissions using control information received from the aGW central node.

[60] The packet data convergence protocol layer “PDCP” performs header compression of the MBMS multimedia broadcast / multicast services. For the transmission of MBMS service data, the packet data convergence protocol layer “PDCP” can be located at the “aGW” central node. In addition, for one service, there can be one PDCP packet data convergence protocol module for a group of cells, and aGW central node can manage this group of cells.

[61] The DL-SCH shared channel for the MBMS service may not apply acknowledgment / non-acknowledgment (ACK / NACK) messages and may not report CQI channel quality indicator messages for MBMS multimedia broadcast / multicast services ". In addition, MBMS multiplexing and dedicated services may not be allowed on the same DL-SCH. However, the “MAC” media access control layer may support the “ARQ” automatic repeat request function for the “MBMS” multimedia broadcast / multicast service. In this case, the automatic ARQ repeat request or hybrid HARQ automatic repeat request schemes can be used in a fixed manner without ACK / NACK messages from the UE terminal (subscriber unit). The number of retransmissions for an automatic ARQ repeat request or a hybrid automatic ARQ repeat request can be fixed, for example, 2 or 3 times, and the DL-SCH retransmission can be synchronous to reduce the signaling duration. In this regard, the shared channel "DL-SCH" for multimedia broadcast / multicast service "MBMS" may differ from the channel "DL-SCH" for dedicated services.

[62] In accordance with one embodiment of the invention, the multicast / broadcast service will include specific (individual) cell information. If the cells are different, then the MBMS multimedia broadcast / multicast service control information, such as service information, RB unidirectional radio channel information, and scheduling information, may be different in different cells. Therefore, the MCCH multicast control channel may be configured for each cell so that it is capable of transmitting specific multimedia broadcast / multicast MBMS control information of the cell.

[63] The MCCH multicast control channel may provide service information listing all services available in the cell and information related to multi-point unidirectional radio channels (“RTM RB”) in the shared DL-SCH channel and the MSN multicast channel »For each service. Based on the information from the MCCH multicast control channel, the UE terminal learns how to configure the RTM RB radio channel in the shared DL SCH channel or the RTM RB radio channel in the MSN multicast channel for the service of interest to the MSN terminal UE. "

[64] The MCHCH multicast control channel may be mapped to the BCH broadcast channel, the MCH multicast channel, or the DL-SCH shared channel. If the MSSN channel is mapped to the BCH channel, the MBMS control information in the MSSN channel can be repeated as system information in the BCCN broadcast control channel, and other information in the MSSN channel is processed in the form of several blocks system information "SIB" in the broadcast channel "VSN". In this case, the BCH broadcast channel can be flexibly assigned to any resource block (s). In the absence of flexibility in the assignment on the BCN channel, the MCCN multicast control channel can be mapped to the DL-SCH shared channel.

[65] For transmission by multiple cells, the network can transmit a pseudostatic (semi-static) distribution of MBMS services by transmitting control signals (signaling) in the main frequency band via the MCH multicast channel. The signaling in the main frequency band is programmably combined, so the UE terminal can combine the signaling from the plurality of cells transmitting the same scheduling information in the main frequency band. For signaling in the main frequency band, the “MSCH” scheduling channel can be used, while the “MSCH” scheduling channel is mapped to the “MCH” multicast channel. The channel baseband signaling may include information related to the time / frequency allocated for the MBMS service schedule and information about the MCS modulation and coding parameter set. The MCS information indicates the type of modulation / coding scheme used to transmit the MBMS service.

[66] For transmission by a single cell (single cell transmission), instead of the “MSCH” scheduling channel, control information of L1 / L2 levels can be used. The L1 / L2 control information may also control the intermittent reception of “DRX” by the “UE” of the shared channel “DL-SCH” when transmitting a multicast / broadcast service by a single cell (single cell). In this case, the terminal "UE" monitors the control information of the L1 / L2 levels in a given interval for a certain period of time. If the terminal "UE" detects that the identifier of the service of interest to the terminal "UE" is included in the control information of the L1 / L2 levels, then the terminal "UE" receives the graph data of the multimedia broadcast / multicast service "MBMS" on the shared channel "DL-SCH" in accordance with the allocated resource included in the control information of the L1 / L2 levels.

[67] According to one embodiment of the invention, if the cell bandwidth includes 20 MHz, then the MBMS multimedia broadcast / multicast service providing method in this cell includes providing multicast / broadcast services in the lower part of the bandwidth 10 MHz and the provision of unicast services at the top of the 10 MHz band. Alternatively, a method for providing MBMS services is proposed, including providing multicast / broadcast services in the central part of the 10 MHz band and providing unicast services outside the central part of 10 MHz band.

[68] Accordingly, if the frequency band of the cell, for example, 20 MHz is greater than the minimum frequency band of the terminal “UE” (subscriber unit), for example, 10 MHz, then the terminal “UE” should indicate to the node “eNode B” about receiving or about the priority of receiving multicast / broadcast service or waiting to receive it, because the eNode B may not know if the UE is receiving a multicast / broadcast service or wishes to receive it. After receiving the UE terminal instruction, the eNode B may move the unicast service to the 10 MHz band in which the multicast / broadcast service is transmitted. This will help the UE (subscriber unit) to receive both the multicast / broadcast service and the unicast service.

[69] However, due to the state of the resources, the eNode B may not be able to move the unicast service to the 10 MHz band in which the multicast / broadcast service is transmitted. Accordingly, the eNode B cannot help the UE receive both services simultaneously. In this case, the terminal “UE”, according to its preference, chooses which service to receive - multicast / broadcast or unicast.

[70] In accordance with one embodiment of the invention, the characteristics of the terminal “UE” can be dynamically updated by exchanging signals between the terminal “UE” and the node “eNode B”. Since the eNode B may not know which multicast / broadcast service the UE intends to receive, the UE calculates the available processing and reception resources based on the resources that the broadcast channel would occupy. After that, the terminal "UE" informs the node "eNode B" information about the estimated resources of processing and reception. The information exchanged between the UE terminal and the base station manager (eNode B node) may include the number of frequency subcarriers and processing processes used for the unicast service.

[71] FIG. 7 illustrates a method for obtaining a point-to-multi-point multicast service in a wireless communication system in accordance with one embodiment of the invention. 7 specifically addresses the MBMS multimedia broadcast / multicast service; however, it is contemplated that the features set forth herein can be applied to any type of point-to-point multicast services.

[72] Referring to FIG. 7, a UE (subscriber unit) obtains area information related to an MBMS multimedia broadcast / multicast service of interest to a UE terminal (S100). The MBMS service may be provided by single cell transmission (single cell transmission) or by multiple cell transmission (multi cell transmission). After that, the terminal "UE" based on the information provided by the node "eNode B", determines which multicast control channel "MSSN" provides control information related to the terminal "UE" service "MBMS" (S110). In one aspect, the UE may select the MCCN multicast control channel in accordance with the desired (preferred) method of obtaining the MBMS service, i.e. according to the preference for receiving the MBMS service by transmitting with a single cell (single-cell transmission) or by transmitting with multiple cells (multi-cell transmission). In another aspect, the UE may select an MCCN multicast control channel in accordance with the area where the MBMS service is provided. After selecting the appropriate multicast control channel “MSSN”, the terminal “UE” receives control information related to the MBMS service of interest to the terminal “UE” via the corresponding multicast control channel “MSSN” (S 120).

[73] Accordingly, the method of obtaining the MBMS service of interest to the UE terminal will be different depending on the type of MBMS service (SI30). If the MBMS multimedia broadcast / multicast service is a single cell transmission service (single cell transmission), then the UE receives the scheduling information for this MBMS service provided by the eNode B by the L1 / L2 control channel (S140 ) Then, the “UE” terminal receives the “MBMS” service from the cell via the MTSN traffic multicast channel in accordance with the scheduling information provided by the “eNode B” (S150).

[74] However, if the MBMS multimedia broadcast / multicast service is a multi-cell transmission service (multi-cell transmission), then the UE receives the scheduling information for the MBMS service provided by the aGW central node via the MBMS control channel (S160). Then, the UE receives the MBMS service on the MTSN traffic channel from the plurality of cells in accordance with the scheduling information provided by the aGW central unit (S170).

[75] With regard to the utility of the features of the considered embodiments of the invention, it may be quite obvious that these features can be applied to various wireless communication technologies supporting a point-to-multipoint multipoint communication service, such as a developing (expanded) universal system mobile communication "E-UMTS", which is one of the types of long-term development system "LTE".

[76] Although the present invention has been described in the context of mobile communications, its features can also be used in any wireless communication systems using mobile devices, such as PDAs and laptops equipped with wireless features. In addition, the use of certain terms to describe the present invention should not limit the scope of the present invention to certain type of wireless communication systems, such as the UMTS universal mobile communication system. The present invention is also applicable to other wireless communication systems using various wireless interfaces and / or physical layers, for example, TDMA (time division multiple access), CDMA (code division multiple access), FDMA (frequency division multiple access), WCDMA (Broadband Multiple Access with Channel Separation), etc.

[77] Preferred embodiments of the present invention can be implemented as a method, device, or industrial product using standard programming and / or hardware, for the production of software, firmware, hardware, or any combination thereof. The term “industrial product,” as used herein, refers to a code or logic element embedded in hardware logic (eg, integrated circuit, user programmable gate array (FPGA), specialized integrated circuit (ASIC), etc.) or computer media data [for example media with magnetic storage medium (for example, hard disks, floppy disks, tape drives, etc.), optical storage device (compact discs (CD-ROM), optical disks, etc.), volatile and non-volatile spare flashing devices (for example, EEPROM - electronically-reprogrammable read-only memory), ROM (read-only memory (ROM)), PROM (programmable read-only memory (ROM)), RAM (random access memory (RAM)), DRAM (dynamic RAM ), SRAM (static RAM), firmware, programmable logic, etc.)].

[78] Firmware on a computer-readable medium is accessible to the processor and may be executed by it. Embedded programs in which preferred embodiments of the present invention are implemented can be accessed through a transmission medium or through a network file server. In such cases, an industrial product that uses computer programs may contain a transmission medium, such as a transmission line in a network, wireless communications, propagation of signals through space, radio waves, infrared signals, etc. Of course, a person skilled in the art will recognize that many modifications can be made in this configuration without departing from the scope of the present invention, and that the industrial product may contain any storage medium known in the art.

[79] The foregoing embodiments of the present invention and its advantages are merely exemplary and cannot be construed as limiting. These provisions can be easily applied to other types of equipment. The description given here is for illustration only and does not limit the scope of the claims. It should be apparent to those skilled in the art that there are many alternatives, modifications, and changes. In the claims, the means-plus-function clauses are intended to encompass the structure considered herein that performs the specified function, and not only its structural equivalents, but also equivalent structures.

[80]

Claims (40)

1. A method of receiving a point-to-multipoint multipoint service in a wireless communication system, including selecting a point-to-multipoint multipoint control channel among a plurality of point-to-multipoint control multipoint communication channels provided by a cell, which multipoint control channel type "point-to-many points" is selected in accordance with the preferred method of receiving multipoint services such as "point-to-many points"; obtaining control information related to a point-to-multipoint multipoint service by means of a selected point-to-multipoint multipoint control channel; and receiving a point-to-multipoint multipoint service in accordance with said control information. 2. The method according to claim 1, in which the preferred method of receiving the specified multipoint services of the type "point - many points" includes receiving this multipoint communication services of the type "point - many points" in a single cell. 3. The method according to claim 2, in which the control information containing the scheduling information is received on the control channel of the L1 / L2 levels. 4. The method according to claim 2, wherein said point-to-multipoint multipoint service is received on a downlink shared channel. 5. The method according to claim 2, further comprising applying a retransmission scheme based on feedback on the uplink. 6. The method according to claim 2, in which control information containing scheduling information is received from the base station (node "eNode B"). 7. The method according to claim 1, in which the preferred method of receiving the specified multipoint services of the type "point - many points" includes receiving this multipoint service of the type "point - many points" in many cells. 8. The method according to claim 7, in which the specified control information containing the scheduling information is received on the multicast control channel multimedia broadcast / multicast service "MBMS" (channel "MCCH"). 9. The method according to claim 7, wherein said point-to-multipoint multipoint service is received on a multicast channel using the L1 layer summation technique. 10. The method according to claim 7, in which control information containing scheduling information is received from the central node "aGW". 11. A method for receiving a point-to-multipoint multipoint service in a wireless communication system, including
selecting a point-to-multi-point multipoint control channel from among a plurality of point-to-many-point multi-point control channels provided by the cell, wherein said multi-point control channel is selected in accordance with the zone where the point-to-multi-point multipoint service is provided ;
receiving control information related to a point-to-multiple-point multipoint service through a selected point-to-multiple-point multipoint control channel; and
receiving this point-to-multipoint multipoint service in accordance with said multipoint control information. 12. The method according to claim 11, in which the specified multipoint service type "point - many points" is provided using a single cell. 13. The method of claim 12, wherein said control information comprising scheduling information is received on a control channel of L1 / L2 levels. 14. The method of claim 12, wherein said point-to-multipoint multipoint service is received on a downlink shared channel. 15. The method of claim 12, further comprising applying an uplink feedback retransmission scheme. 16. The method according to item 12, in which control information containing scheduling information is received from the base station (node "eNodeB"). 17. The method according to claim 11, in which the specified multipoint service type "point - many points" is provided using multiple cells. 18. The method according to 17, in which the specified control information containing the scheduling information is received on the multicast control channel multimedia broadcast / multicast service "MBMS" (channel "MCCH"). 19. The method of claim 17, wherein said point-to-multipoint multipoint service is received on a multicast channel using the LI layer summation technique. 20. The method of claim 17, wherein said control information comprising scheduling information is received from a central node. 21. A method for transmitting a point-to-multipoint multipoint service in a wireless communication system, including
providing a cell with a plurality of multipoint control channels of the “point to many points” type; the transmission of control information to the mobile terminal via a multi-point control channel of the type "point - many points" selected by this mobile terminal among the many multi-point control channels of the type "point - many points", and this multi-point control channel of the type "point - many points" is selected in accordance with a preferred method for transmitting a point-to-multipoint multipoint communication service; and transmission of a point-to-multipoint multipoint service in accordance with this control information. 22. The method of claim 21, wherein the preferred method of transmitting a point-to-multi-point multipoint service includes transmitting a point-to-many-point multipoint service using a single cell. 23. The method according to item 22, in which the specified control information containing scheduling information is transmitted on the control channel of the L1 / L2 levels. 24. The method of claim 22, wherein said point-to-multipoint multipoint service is transmitted in a downlink shared channel. 25. The method according to item 22, further comprising applying a retransmission scheme based on uplink feedback. 26. The method according to item 22, in which the specified control information containing scheduling information is transmitted from the node "eNode B". 27. The method according to item 21, in which the preferred method of transmitting multipoint services of the type "point - many points" includes the transmission of this multipoint service type "point - many points" using multiple cells. 28. The method according to item 27, in which the specified control information containing the scheduling information is transmitted through the multicast control channel multimedia broadcast / multicast service "MBMS" (channel "MCCH"). 29. The method of claim 27, wherein said point-to-multipoint multipoint service is transmitted over a multicast channel using the L1 layer summation technique. 30. The method according to item 27, in which the specified control information containing scheduling information is transmitted from the Central node. 31. A method for transmitting a point-to-multipoint multipoint service in a wireless communication system, including providing a cell with a plurality of point-to-multipoint control channels; the transmission of control information to the mobile terminal via a point-to-multi-point multipoint control channel selected by this mobile terminal from among the multiple point-to-many point multipoint control channels, this multi-point control channel being selected in accordance with the area where the specified multipoint is provided point-to-many-point service; and transmitting said point-to-multipoint multipoint service in accordance with the control information. 32. The method according to p, in which the specified multipoint service type "point - many points" is provided using a single cell. 33. The method according to p, in which the specified control information containing scheduling information is transmitted on the control channel of the L1 / L2 levels. 34. The method of claim 32, wherein said point-to-multipoint multipoint service is transmitted in a downlink shared channel. 35. The method of claim 32, further comprising applying an uplink feedback retransmission scheme. 36. The method according to p, in which the specified control information containing scheduling information is transmitted from the node "eNode B". 37. The method according to p, in which the specified multipoint service type "point - many points" is provided using multiple cells. 38. The method according to clause 37, in which the specified control information containing the scheduling information is transmitted through the multicast control channel multimedia broadcast / multicast service "MBMS" (channel "MSSN"). 39. The method according to clause 37, in which the specified multipoint communication service type "point - many points" is transmitted via a multicast channel using the technique of summing level L1. 40. The method according to clause 37, in which the specified control information containing scheduling information is transmitted from the Central node.

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