CN102035806A - A method and system for transmitting dynamic scheduling information - Google Patents

Abstract

The invention discloses a method and a system for transmitting dynamic scheduling information, and relates to an LTE (Long term evolution) system. The method comprises the following steps: network side equipment sends DSI of a main MCH on the main MCH carrying the MCCH, and sends DSI of other MCHs on the other MCHs except the main MCH respectively, wherein the DSI of the other MCHs all adopt the same MCS; and the user equipment receives the DSI of the main MCH on the main MCH, and respectively receives the DSI of other MCHs on the other MCHs, wherein the user equipment decodes the DSI of the other MCHs according to the same MCS. The technical scheme of the invention ensures that the receiving terminal can accurately obtain the specific position information of the MBMS service to be received in a scheduling period.

Description

A method and system for transmitting dynamic scheduling information

technical field

The present invention relates to an LTE (Long Term Evolution, long-term evolution) system, in particular to a method and system for transmitting dynamic scheduling information of Multimedia Broadcast and Multicast Service (MBMS).

Background technique

With the rapid development of the Internet and the popularization of large-screen multifunctional mobile phones, a large number of mobile data multimedia services and various high-bandwidth multimedia services have emerged, such as video conferences, TV broadcasts, video on demand, advertisements, online education, interactive games, etc. On the one hand, it satisfies the ever-increasing business demands of mobile users, and at the same time brings new business growth points for mobile operators. These mobile data multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.

In order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as 3GPP) proposed the MBMS service, which is a technology for transmitting data from one data source to multiple targets, and realizes the network ( The sharing of resources including core network and access network improves the utilization rate of network resources (especially air interface resources). The MBMS defined by 3GPP can not only realize plain text and low-rate message multicast and broadcast, but also realize broadcast and multicast of high-speed multimedia services, and provide a variety of rich video, audio and multimedia services, which undoubtedly conforms to the requirements of future mobile networks. The trend of data development provides a better business prospect for the development of 3G.

In LTE, MBMS services can adopt multicast mode, which is called MBSFN (Multicast/Broadcast over Single Frequency Network, single frequency network multicast broadcast) transmission mode, and MBMS services sent in multicast mode are also called MBSFN services. The same modulation and coding format can be used in multiple cells, and the same content can be generated using the same physical resources. The characteristics of MBMS cell transmission are as follows:

1) Synchronous transmission in the MBSFN area; 2) Support multi-cell MBMS transmission combination; 3) MTCH (Multicast traffic Channel, multicast service channel) and MCCH (Multicast Control Channel, multicast control channel) in p-T-m (point-to-multipoint) In this mode, it is mapped to the MCH (multicast channel); 4) MBSFN synchronization area, MBSNF area, MBSFN transmission, advertisement, and reserved cells are all semi-statically configured by operation and maintenance.

In this way, UEs (User equipment, user equipment) in multiple cells can receive multiple MBMS data with the same content and perform SFN (Single Frequency Network) combination, thereby improving the gain of received signals. Multiple cells that use the same physical resources and transmit the same MBMS service in the MBSFN transmission mode constitute an MBSFN area.

In actual LTE networking, there are several MBSFN services in one MBSFN area, and all the MBSFN services belonging to the same MBSFN area are called an MBSFN service group, that is to say, one MBSFN service group only belongs to one MBSFN area. An MBSFN area includes multiple cells, and each cell is configured with exactly the same MBSFN service group. The data channels MTCH of multiple MBSFN services in the same MBSFN area and the control channel MCCH of MBSFN services can be multiplexed into one MCH (Multicast Channel, multicast channel). MCCH and multiple MTCHs in the same MBSFN area, that is, multiple logical channels can be mapped to the same transport channel MCH;

表示非MBSFN frame，

表示MBSFN frame，

表示非MBSFN subframe，

表示MBSFN subframe，

表示固定不用的。这些多播资源采用一套MSAP(MBSFN subframe allocation pattern，MBSFN子帧分配图样)来配置，包括无线帧分配模式和无线子帧分配模式，每个MBSFN区域的多播资源可以以子帧为单位按照一定的图样分成多个组，每个组可以构成一个MCH，或者多个组构成一个MCH。那么每个MCH构成时所使用的图样就叫做该MCH的MSAP，一个MSAP描述一个MCH信道的物理资源。每个小区可以有1个或多个MCH，每个MCH都唯一对应一个MSAP，且唯一属于一个MBSFN区域，但每个MBSFN区域可以有1个或多个MCH，每个MCH所配置的多播资源的配置方法是为每个MCH都配置一套MSAP。In the LTE system, MCH is a transmission channel, which is characterized by point-to-multipoint transmission. The corresponding physical resources are multicast resources allocated by the system for the transmission of MBMS services (MTCH). One MCH is carried on some multicast resources. These multicast resources include several MBSFN frames and MBSFN subframes, as shown in Figure 1,

Represents a non-MBSFN frame,

Indicates MBSFN frame,

Indicates a non-MBSFN subframe,

Indicates MBSFN subframe,

Indicates that it is not fixed. These multicast resources are configured using a set of MSAP (MBSFN subframe allocation pattern, MBSFN subframe allocation pattern), including wireless frame allocation mode and wireless subframe allocation mode. A certain pattern is divided into multiple groups, and each group can constitute an MCH, or multiple groups constitute an MCH. Then the pattern used when forming each MCH is called the MSAP of the MCH, and one MSAP describes the physical resources of one MCH channel. Each cell can have one or more MCHs, each MCH uniquely corresponds to one MSAP, and belongs to one MBSFN area, but each MBSFN area can have one or more MCHs, and the multicast configured by each MCH The resource configuration method is to configure a set of MSAP for each MCH.

As shown in Figure 2, in order to improve the transmission efficiency of MTCH, multiple MTCHs carried on each MCH can adopt the method of dynamic scheduling, and through dynamic scheduling, two or more MTCHs can be multiplexed in the same MBSFN subframe 2(a), 2(b) and 2(c) are schematic diagrams of resource allocation for Scheduling Period 1, Scheduling Period 2, and Scheduling Period 3, respectively. In the existing public technology, MSAP occasion (MSAP opportunity) is introduced into the concept of MSAP at the same time, which indicates a scheduling cycle (that is, a period of time of the wireless interface, and multiple services are sequentially included in the MBSFN subframe scheduling resource in the scheduling cycle) One MCH corresponding to a certain MSAP includes all the multicast resources within the time period of the upper transmission). In one MSAP occasion, multiple MTCHs and the dynamic scheduling information (Dynamic scheduling information, DSI, referred to as scheduling information) of these MTCHs can be sent, which refers to the specific location information of the service in the scheduling period, and the dynamic scheduling information can be used in the scheduling period. sent, or sent within one or several scheduling periods before the scheduling period, generally, the scheduling information should be sent to the UE before the service data in the scheduling period indicated by it is sent), it can also include MCCH, and the scheduling information can be carried in the MAC (Media Access Control) Control part (MAC control element) MSAP occasion length is generally fixed at 320ms. Similarly, a scheduling period is generally fixed at 320ms, or 2 ⁿ × 320ms (n=-3, -2, -1, 0, 1, 2, 3, 4...N), correspondingly , MSAP occasion time length is 40ms, 80ms, 160ms, 320ms, 640ms, 1280ms, etc. An MSAP occasion time length, also called MSAP occasion period, is a scheduling period, also known as a scheduling period. One MCH allocates one or more MBSFN subframes in one or more MBSFN frames through MSAP, wherein the subframes sent in multicast mode are called MBSFN subframes, and the frames containing MBSFN subframes are called MBSFN frames. There are multiple MCHs in one MBSFN area, and each MCH has its own scheduling period (scheduling period), which can also be called MSAP occasion (period), and the scheduling periods of each MCH can be the same or different.

所示为MCH1，

所示为MCH2，所示为MCH3，

所示为MCH4)都有一个承载了其动态调度信息DSI的调度块(如图3中

所示)，一般地DSI承载在MAC SDU上，配置在其调度的MCH的最前面，当这条MCH上承载了MCCH时，即该MCH上同时承载了DSI，MCCH和MTCH时候，三者的承载顺序为：DSI，MCCH和MTCH。In the prior art, as shown in Figure 3, each MCH (as shown in Figure 3

Shown is MCH1,

Shown is MCH2, Shown is MCH3,

Shown as MCH4) has a scheduling block that bears the weight of its dynamic scheduling information DSI (as shown in Figure 3

As shown), generally DSI is carried on the MAC SDU and is configured at the front of the scheduled MCH. When the MCH carries the MCCH, that is, the MCH carries the DSI, MCCH and MTCH at the same time, the three The bearing order is: DSI, MCCH and MTCH.

Each MSAP occasion configured by an MCH carries scheduling information, carrying mapping information from MTCH to auxiliary MSAP subframes. This mapping information is determined by means of the MBSFN subframe number index relationship within a scheduling period. UE reads The scheduling information can be used to know which MBSFN subframes each MTCH is allocated to. The UE can read the MTCH it is interested in in the corresponding MBSFN subframe, and ignore the MBSFN subframe it does not need to read, thereby improving the UE's MBMS service reception efficiency and saving the UE's power consumption. The numbering of the MBSFN subframes described here is determined as follows: all the MBSFN subframes allocated by one MCH within one scheduling period are arranged in order and numbered sequentially. For example, the total number of MBSFN subframes allocated by the MCH channel in one cycle is 100, and the subframe numbers range from 0 to 99, or 1 to 100, and start/end can be used to indicate the occupation of each MBMS service carried on the MCH subframe resources.

In the existing LTE technology, multiple transport channels multiplex the MCH channel in the following manner: one subframe corresponds to one TTI (Transmission Time Interval), and one output data block can be sent in one TTI, corresponding to one MAC PDU (Media Interface Interval). into the Control Plane Protocol Data Unit). In a MAC PDU, multiple MAC SDUs (service data units) and MAC CEs (MAC control elements, MAC control elements) can be included. These MAC SDUs can come from different logical channels. Possible logical channels include MTCH, MCCH, MSCH, etc. , MAC CE can carry dynamic scheduling information. These data from different logical channels are concatenated in the MAC PDU and sent on the physical channel together. In order to distinguish MAC SDUs from different logical channels, the MAC PDU carries identification information, specifically, the identification of the logical channel, the position information of the data block of the logical channel in the MAC PDU, etc., which are used by the receiving end to distinguish different logical channels. data block.

In an MBSFN area, there are many MBMS services, and each service has a service ID (service ID), and may also have a session ID (session ID). In this MBSFN area, all MBMS services have a unique service ID . All services in an MBSFN area are carried on different MCHs, and each MCH is assigned a logical channel identifier (such as: MTCH ID) for the services carried by it. In this way, on each MCH, the service identifier and logical channel identifier One to one correspondence. The value range of the logical channel is (0, 1, 2, ... 31), that is to say, a maximum of 32 logical channels can be carried and distinguished on one MCH. Different MCHs may have the same logical channel ID, and these same logical channel IDs correspond to different service IDs. In other words, all services of an MBSFN area are uniquely indicated by the MCH ID and the logical channel ID. Figure 4.

Each piece of DSI indicates the MBSFN subframe resources allocated by all MBMS services on one MCH, which can be indicated by the start or end subframe of each MBMS service (start/end). As shown in Figure 5. All services are arranged in order. Since the order of all MBMS services has been configured on the MCCH message, the network side and the UE have already known the order of all MBMS services on the MCH. Therefore, there is no need to The logical channel identifier of the MBMS service is explicitly indicated, and only need to configure {start/end, start/end, ...start/end} in sequence. 1, 2, ..n in the attached figure are actually in the DSI content Does not exist, just for convenience of description.

Due to the different areas where MBMS services are transmitted, there may be multiple MCHs in a certain cell, carrying services belonging to different MBMS service areas; in addition, due to the different QoS attributes of services, one MBSFN area may also be configured with multiple MCHs. Each MCH is configured with a different MCS (Moduling Coding Scheme, modulation and coding scheme), carrying MBMS services with different QoS requirements, including MCCH and DSI with special QoS requirements. In a scenario where there are multiple MCHs, how to send scheduling information and select a corresponding MCS needs to be designed.

At the same time, according to the current technology, there are multiple MCHs in one MBSFN area, so there are multiple MCSs, and each MCH has a DSI. Which MCS is used by these DSIs is a problem that needs to be solved urgently.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and system for transmitting dynamic scheduling information, which is used to indicate UE service scheduling information in a scenario of multiple MCHs.

In order to solve the above problems, the present invention discloses a method for transmitting DSI, including:

The network side device sends the DSI of the main MCH on the main MCH carrying the MCCH, and sends the DSI of other MCHs on the other MCHs except the main MCH, and the DSIs of the other MCHs all use the same MCS;

The user equipment receives the DSI of the main MCH on the main MCH, and respectively receives the DSI of other MCHs on the other MCHs, wherein the user equipment decodes the DSI of the other MCHs according to the same MCS.

Further, in the above method, the same MCS adopted by the DSI of the other MCH is the MCS of the MCCH, and the user equipment obtains the MCS of the MCCH from a system broadcast message to decode the DSI of the other MCH; or

The same MCS adopted by the DSI of the other MCH is the MCS configured on the system broadcast message, and the user equipment reads the system broadcast message and obtains the MCS of the DSI, and then decodes the DSI of the other MCH.

Wherein, the MCS adopted by the DSI of the primary MCH is the MCS of the MCCH, and the user equipment obtains the MCS of the MCCH from a system broadcast message to decode the DSI of the primary MCH; or

The MCS used by the DSI of the primary MCH is the MCS configured on the system broadcast message, and the user equipment reads the system broadcast message and obtains the MCS of the DSI, and then decodes the DSI of the primary MCH.

The MCS used by the DSI of the main MCH is the MCS of the MCCH, and the MCS used by the DSI of the main MCH is always the same as the MCS of the MCCH; or

The MCS adopted by the DSI of the primary MCH is the same as the MCS of the MCCH only during the period when the primary MCH bears the MCCH.

The invention also discloses a method for transmitting DSI, including:

The network side device combines the DSIs of all MCHs into a new DSI, and sends the new DSI on the main MCH carrying the MCCH;

The user equipment receives the new DSI on the primary MCH.

Further, in the above method, the new DSI adopts the same MCS as the modulation and coding scheme (MCS) of the MCCH, and the user equipment acquires the MCS of the MCCH from a system broadcast message to decode the new DSI; or

The new DSI adopts the MCS configured on the system broadcast message, and the user equipment reads the system broadcast message and obtains the MCS of the DSI, and then decodes the new DSI.

Wherein, the MCS adopted by the new DSI is the same as the MCS of the MCCH, which means that the MCS adopted by the new DSI is always the same as the MCS of the MCCH; or

The MCS adopted by the new DSI is the same as the MCS of the MCCH only during the period when the primary MCH bears the MCCH.

The sending period of the new DSI is the greatest common divisor of the DSI scheduling periods of all MCHs in the cell, or the least common multiple of the DSI scheduling periods of all MCHs.

In the process of receiving the new DSI, if the user equipment only receives the DSI of the multimedia broadcast and multicast service (MBMS) it is interested in, according to the scheduling period of the first MCH carrying the MBMS service it is interested in, and The sending cycle of the new DSI, determining the receiving cycle of the new DSI, and receiving the new DSI within the determined receiving cycle;

Wherein, the new DSI received in the receiving period includes the DSI of the first MCH.

When the user equipment receives a new DSI within the receiving period, it starts from the starting position of the new DSI, skips the length of M bytes, and starts to read the subframe allocation information of the MBMS service it is interested in;

Among them, M=n1*Bit ₁ +n2*Bit ₂ +...+nk*Bit _k +r*Bit;

n1 indicates the total number of services that appear on the first MCH before the first MCH in the new DSI, n1*Bit ₁ indicates the total length of the DSI of the first MCH, and so on, and nk indicates the new DSI How many services are there in total on the kth MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the kth MCH, and r represents the MBMS service that the user is interested in sending on the first MCH For the number of MBMS services carried as mentioned above, r*Bit represents the total byte length allocated by the r services.

The present invention also discloses a system for transmitting DSI, including network side equipment and user equipment, wherein:

The network side device is configured to send the DSI of the main MCH on the main MCH carrying the MCCH, and send the DSI of other MCHs on the other MCHs except the main MCH, and the DSIs of the other MCHs all use the same MCS ;

The user equipment is configured to receive the DSI of the main MCH on the main MCH, and respectively receive the DSI of other MCHs on the other MCHs, wherein the user equipment decodes the DSI of the other MCHs according to the same MCS.

Further, in the above system, in the network side device, the same MCS used by the DSI of other MCHs sent on the other MCHs is the MCS of the MCCH, or the MCS configured on the system broadcast message;

The user equipment is configured to obtain the MCS of the MCCH from a system broadcast message to decode the DSI of the other MCH, or obtain the MCS for DSI from the system broadcast message and decode the DSI of the other MCH.

Wherein, in the network side device, the MCS adopted by the DSI of the main MCH sent on the main MCH is the MCS of the MCCH, or the MCS configured on the system broadcast message;

The user equipment is configured to obtain the MCS of the MCCH from the system broadcast message to decode the DSI of the primary MCH, or read the system broadcast message and obtain the MCS of the DSI and then decode the DSI of the primary MCH.

Wherein, the MCS used by the DSI of the main MCH is the MCS finger of the MCCH, and the MCS used by the DSI of the main MCH is always the same as the MCS of the MCCH; or

The MCS adopted by the DSI of the primary MCH is the same as the MCS of the MCCH only during the period when the primary MCH bears the MCCH.

The present invention also discloses a system for transmitting DSI, including network side equipment and user equipment, wherein:

The network side device is configured to combine the DSIs of all MCHs into a new DSI, and send the new DSI on the main MCH carrying the MCCH;

The user equipment is configured to receive the new DSI on the primary MCH.

Further, in the above system, the new DSI sent by the network side device on the main MCH adopts the same MCS as the MCS of the MCCH, or adopts the MCS configured on the system broadcast message;

The user equipment acquires the MCS of the MCCH from the system broadcast message to decode the new DSI, or reads the system broadcast message and obtains the MCS of the DSI to decode the new DSI.

Wherein, the MCS adopted by the new DSI is the same as the MCS of the MCCH, which means that the MCS adopted by the new DSI is always the same as the MCS of the MCCH; or

The MCS adopted by the new DSI is the same as the MCS of the MCCH only during the period when the primary MCH bears the MCCH.

The sending period of the new DSI is the greatest common divisor of the DSI scheduling periods of all MCHs in the cell, or the least common multiple of the DSI scheduling periods of all MCHs.

Further, in the process of receiving the new DSI, the user equipment is only used to receive the DSI of the MBMS it is interested in, and according to the scheduling period of the first MCH carrying the MBMS service it is interested in, and the The sending cycle of the new DSI, determining the receiving cycle of the new DSI, and receiving the new DSI within the determined receiving cycle;

Wherein, the new DSI received in the receiving period includes the DSI of the first MCH.

Wherein, the user equipment, when receiving a new DSI within the receiving period, starts from the start position of the new DSI, skips the length of M bytes, and starts to read the subframe allocation information of the MBMS service it is interested in ;

Among them, M=n1*Bit ₁ +n2*Bit ₂ +....+nk*Bit _k +r*Bit;

n 1 indicates the total number of services that appear on the first MCH before the first MCH in the new DSI, n1*Bit ₁ indicates the total length of the DSI of the first MCH, and so on, nk indicates the new DSI How many services appear on the k-th MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the k-th MCH, and r represents the MBMS that the user is interested in sending on the first MCH The number of MBMS services carried before the service, r*Bit indicates the total byte length allocated by the r services.

After adopting the technical solution of the present invention, the receiving terminal can accurately obtain the specific location information of the MBMS services that need to be accepted within a scheduling period. Specifically, when the UE needs to receive multiple MBMS services at the same time, it can obtain the scheduling of these services at one time Information, so as to prevent the UE from reading scattered scheduling information multiple times, save UE power, improve receiving efficiency, and have a good wireless interface signaling transmission efficiency.

Description of drawings

FIG. 1 is a schematic diagram of multicast resources allocated by MSAP occasion of an MCH in the prior art;

Figure 2(a) is a schematic diagram of resource allocation for Scheduling Period 1;

Figure 2(b) is a schematic diagram of resource allocation for Scheduling Period 2;

Figure 2(c) is a schematic diagram of resource allocation for Scheduling Period 3;

FIG. 3 is a schematic configuration diagram of dynamic scheduling information of multiple MCHs in the prior art;

Fig. 4 is a configuration schematic diagram in which all services of multiple MCHs are carried in an MCCH message in the prior art;

FIG. 5 is a schematic diagram of DSI content of an MCH in the prior art;

Fig. 6 is the flowchart of embodiment 1;

Fig. 7 is the flowchart of embodiment 2;

Fig. 8 is a schematic diagram of the relationship between the allocation cycle and the unified scheduling cycle in the present invention;

FIG. 9 is a schematic diagram of unified configuration of dynamic scheduling information of multiple MCHs into one DSI in the present invention;

Fig. 10 is a schematic diagram of a unified DSI in the present invention;

Fig. 11 is a flow chart of the UE receiving the DSI of the MBMS service it is interested in in this embodiment.

Detailed ways

The technical solution of the present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.

A system for transmitting scheduling information, including network side equipment and user equipment.

The network side device is used to send the DSI of the main MCH on the main MCH carrying the MCCH, and send the DSI of other MCHs on the other MCHs except the main MCH, wherein the other MCHs all use the same MCS, and the same MCS can be The MCS of the MCCH or the set MCS. The specific method for the system to set the same MCS can be to configure an MCS for all DSIs on the system broadcast message, including the DSI of the main MCH and the DSI of other MCHs. That is to say, the system Configure an MCS dedicated to DSI on the broadcast message;

In this embodiment, the main MCH can use the MCS of the MCCH or the MCS configured on the system broadcast message. When the main MCH can use the MCS of the MCCH, it can always be the same as the MCS of the MCCH, or only the MCCH is carried on the main MCH. (that is, when the MCCH appears on the primary MCH), the MCS of the primary MCH is the same as the MCS of the MCCH.

The user equipment (UE) is used to receive the DSI of the main MCH on the main MCH, and receive the DSI of other MCHs on other MCHs respectively. When the other MCHs use the MCS of the MCCH as the same MCS, the UE can broadcast the information from the system. Obtain the MCS of the MCCH to decode the DSI of other MCHs. When other MCHs use the same MCS obtained from the system broadcast message, the UE obtains the MCS of the DSI from the system broadcast message, and decodes the DSI of other MCHs according to this MCS;

Correspondingly, when the primary MCH adopts the MCS of the MCCH, the UE can obtain the MCS of the MCCH from the system broadcast message to decode the DSI of the primary MCH; when the MCH adopts the MCS configured in the system broadcast message, the UE obtains the MCS from the system broadcast message And decode the DSI of the main MCH.

There is also a system for transmitting scheduling information, wherein the network side equipment is used to combine the DSIs of all MCHs into a new DSI (ie DSI-new), and send DSI-new on the main MCH carrying the MCCH, wherein , DSI-new can use the same MCS as the MCS of MCCH, or configure an MCS for the DSI-new in the system broadcast message, and the sending period of DSI-new can be the maximum convention of the DSI scheduling period of all MCHs in the cell number, or the least common multiple of the DSI scheduling periods of all MCHs;

The UE is used to receive DSI-new on the main MCH, obtain the MCS of the MCCH from the system broadcast message to decode DSI-new, or read the MCS from the system broadcast message and decode DSI-new;

In a preferred embodiment, during the process of receiving DSI-new, the UE may only receive the DSI of the MBMS service it is interested in, and according to the scheduling period of the first MCH carrying the MBMS service and the new DSI-new The sending period determines the receiving period of DSI-new, and receives DSI-new within the determined receiving period, wherein the DSI-new received within the determined receiving period of the UE includes the DSI of the first MCH;

When UE receives DSI-new in the receiving period, it starts from the starting position of DSI-new, skips the length of M bytes, and starts to read the subframe allocation information of the MBMS service it is interested in;

Among them, M=n1*Bit ₁ +n2*Bit ₂ +....+nk*Bit _k +r*Bit;

n1 indicates the total number of services that appear on the first MCH before the first MCH in the new DSI, n1*Bit ₁ indicates the total length of the DSI of the first MCH, and so on, and nk indicates the new DSI How many services are there in total on the kth MCH before the first MCH, nk*Bit _k represents the total length of the DSI of the kth MCH, and r represents the MBMS service that the user is interested in sending on the first MCH For the number of MBMS services carried as mentioned above, r*Bit represents the total byte length allocated by the r services.

The following describes the specific process of the above-mentioned system transmitting scheduling information.

Example 1

In this embodiment, an MBSFN area has one or more MCHs, each MCH has a DSI, and each DSI is carried on the MAC CE as an example, to illustrate the process of transmitting dynamic scheduling information, (wherein this article will carry The MCH that has MCCH is called main MCH), as shown in Figure 6, comprises the following steps:

Step 601, the network side device sends the DSI of each MCH on each MCH, wherein the MCS used by the DSI sent on the main MCH is the same as the MCS of the MCCH or the same MCS configured for all MCHs in the system broadcast message, in the The DSI sent on MCHs other than the main MCH all use the same MCS;

In this step, the MCS used by the DSI sent on the main MCH is the same as the MCS of the MCCH, which means that the MCS used by the DSI of the main MCH is always the same as the MCS of the MCCH, or only when the main MCH carries the MCCH (that is, the MCS on the main MCH When the MCCH occurs), the MCS adopted by the DSI of the main MCH is the same as the MCS of the MCCH, and when the main MCH does not carry the MCCH, the MCS adopted by the DSI of the main MCH may be the same as the MCS of the MTCH carried on the main MCH;

When sending DSI on MCHs other than the main MCH, the DSI of other MCHs can use the same MCS as the MCS of the MCCH, or the same MCS configured on the system broadcast message (the MCS configured on the system broadcast message is generally the same as the MCS configured on each MCH). The MCSs of the MTCHs carried are different).

Step 602: The UE receives the DSI of each MCH on each MCH, and decodes the DSI of each MCH according to the corresponding MCS;

Among them, when the UE receives the DSI of each MCH, it can perform corresponding processing according to the configuration on the network side, that is, when the MCS used by the DSI of the main MCH is always the same as the MCS of the MCCH, the UE decodes the DSI of the main MCH according to the MCS of the MCCH That is, when the main MCH carries the MCCH, the DSI of the main MCH uses the same MCS as the MCS of the MCCH, and the UE only needs to use the MCS of the MCCH to decode the DSI of the main MCH during the period when the main MCH carries the MCCH. When the DSI of the system uses the same MCS configured on the system broadcast message, the UE reads the system broadcast message, obtains the same MCS and decodes the DSI of the main MCH;

Similarly, when the DSI of other MCHs always uses the same MCS as the MCCH, the UE can decode the DSI of other MCHs according to the MCS of the MCCH. When the DSI of other MCHs uses the same MCS configured on the system broadcast message, the UE can read Get the system broadcast message and get this same MCS, so as to decode the DSI of other MCH.

Example 2

This embodiment also takes one or more MCHs in one MBSFN area as an example to illustrate the process of transmitting dynamic scheduling information, as shown in Figure 7, including the following steps:

Step 700: The network side device merges the DSIs of all MCHs in the cell into a new DSI (DSI-new), and carries it in a MAC control element (referred to as MAC CE);

Step 701: The network side device sends the DSI-new on the main MCH, wherein the MCS used by the DSI-new is the same as the MCS of the MCCH or the MCS configured on the system broadcast message;

The MCS used by the DSI-new sent on the main MCH is the same as the MCS of the MCCH, which means that the MCS used by the DSI-new of the main MCH is always the same as the MCS of the MCCH, or only when the main MCH carries the MCCH (that is, the main MCH When the MCCH appears on the main MCH), the MCS adopted by the DSI-new on the main MCH is the same as the MCS of the MCCH;

The network side device periodically sends DSI-new on the primary MCH. The DSI-new sending period can be the smallest MSAP occasionperiod among the MSAP occasion periods of all MCHs in the cell, or the least common multiple of the MSAP occasion periods of all MCHs.

Step 702: UE receives DSI-new on the primary MCH, and decodes DSI-new according to the corresponding MCS;

In this step, when the MCS adopted by DSI-new is the same as the MCS of MCCH, the UE decodes DSI-new according to the MCS of MCCH acquired from the system broadcast message, and when the MCS adopted by DSI-new is the one configured in the system broadcast message During MCS, UE reads the system broadcast message and obtains MCS and then decodes DSI-new;

Preferably, during the process of receiving DSI-new, the UE may only receive the DSI of the MBMS service it is interested in. At this time, the UE determines according to the sending period of DSI-new and the MSAP occasion period of the MCH carrying the MBMS service it is interested in. The receiving cycle of the UE (that is, on which sending cycles of DSI-new the UE needs to read DSI-new to obtain the DSI of the MBMS service it is interested in), and when the UE determines the receiving cycle, it can further skip other service, only read the DSI of the MBMS service it is interested in in the DSI-new content, that is, the UE needs to know which of the multiple MCHs whose DSIs also appear in the MCH before the MCH that carries the MBMS service it is interested in In DSI-new: UE skips directly without reading the DSI content of these MCHs, and directly reads the MBSFN subframe allocation information of the service on the DSI of the MCH carrying the service it is interested in.

Specifically, when there are N MCHs in an MBSFN area, the numbers are 1, 2, ... N, and each MCH has a scheduling period (that is, MSAP occasion), the scheduling period with the shortest period among these MSAP occasions is called It is a unified scheduling period, unified scheduling period = min{SP1, SP2,....SPn}, where SPn is the scheduling period of the nth MCH, and the unified scheduling period can also be the greatest common divisor of all MCH scheduling periods, such as: There are 5 MCHs in one MBSFN area, and the scheduling periods of these MCHs are 160ms, 320ms, 640ms, 320ms and 160ms respectively, then the unified scheduling period of all MCHs in this MBSFN area is 160ms, DSI-new is in all MCHs in one MBSFN area sent on the unified scheduling cycle. When the network side allocates MBSFN subframe resources for multiple MCHs in an MBSFN area, the resource allocation is performed with the maximum value of these MCH scheduling periods as the period, and the allocation period is max{SP1, SP2,....SPn}, Where n is the scheduling period of the nth MCH, and the allocation period may also be the least common multiple of the scheduling periods of all MCHs, as shown in FIG. 8 .

The DSI-new period sent by the network side equipment (hereinafter referred to as the DSI-new transmission period) can be the unified scheduling period of all MCHs, or the allocation period of all MCHs. In this way, DSI-new When sending on the new sending cycle, the content includes part or all of the dynamic scheduling information of the MCH;

In this DSI-new, all MBMS services are arranged in order according to the order of MCH, that is, the arrangement of all services is from small to large according to the number of their MCH, such as: {MCH1(MTCH1, MTCH2,...MTCHn ), MCH2(MTCH1, MTCH2,...MTCHn)....MCHk(MTCH1, MTCH2,...MTCHn). Because the arrangement order of all MCHs is indicated in the MCCH message, and the arrangement order of all services of each MCH is indicated, or in other words, the order of DSI can be determined according to the arrangement order of MCHs in MCCH, so the network side and UE can know The specific position of each MBMS service in DSI-new, therefore, there is no need to explicitly indicate the logical channel identifier of each service in DSI-new, only need to configure {start/end, start/end, .. ..start/end}, the first service of the first MCH, the second service of the first MCH, ... the first service of the mth MCH, the second service of the mth MCH Service, ... the first service of the nth MCH, the second service of the nth MCH, ... the first service of the last MCH (MCHm), ... the last MCH (MCHm) The last business, as shown in Figure 9.

In fact, each MCH has its own MSAP occasion period, that is, if the sending period of DSI-new is the unified scheduling period of all MCHs, the DSI of some MCHs does not exist in the configured DSI-new middle. For example, there are 3 MCHs, and their MSAP occasion periods are 320ms, 160ms, and 640ms respectively. If the sending period of DSI-new is the unified scheduling period of all MCHs (that is, 160ms), the DSI content included in DSI-new is:

At 160ms, {DSI1, DSI2, DSI3}

At 320ms, {DSI2}

At 480ms, {DSI1, DSI2}

At 640ms, {DSI2}

That is, within the allocation period of all MCHs (640ms), that is, in the 4 unified scheduling periods (160ms), the content of DSI-new is: in the first unified scheduling period (160ms), there are mobilization information content of 3 MCHs ; In the second unified scheduling period (160ms) there is only MCH1 scheduling information content, in the third unified scheduling period (160ms) there are scheduling information contents of MCH1 and MCH2, in the fourth unified scheduling period (160ms) there is only Scheduling information content of MCH1. These four unified scheduling periods (160ms) form an allocation period. Within the allocation period of 640ms, MCH1 is scheduled 4 times, MCH2 is scheduled 2 times, and MCH3 is only scheduled 1 time, as shown in Figure 10.

The MCCH message is not only configured with a list of all MBMS services of all MCHs, but also configured with MSAP occasion period of each MCH. This embodiment still uses the three MCHs in the figure as an example to illustrate how the UE correctly obtains the allocation of the MBSFN subframes of each MBMS service on one DSI-new.

For the convenience of description, it is assumed that there are 2 services on each MCH, and there are 6 services in total, namely service1, service2, ... service6, where service1 and service2 are carried on the first MCH, and service3 and service4 are carried on the On the second MCH, service5 and service6 are carried on the third MCH: {service1, service2}→MCH1; {service3, service4}→MCH2; {service5, service6}→MCH3.

If three DSIs in the prior art are used to indicate, it is {MTCH1, MTCH2}→MCH1; {MTCH1, MTCH2}→MCH2; {MTCH1, MTCH2}→MCH3. The UE can obtain the allocation of MBSFN subframes for each service according to the order of the MCH on the MCCH and then according to the logical channel identifier, DSI 1→{start/end, start/end}; DSI 2→{start/end, start/end }; DSI 3 → {start/end, start/end}. In the present invention, the content of DSI-new is {start/end, start/end, start/end, start/end, start/end, start/end}, which is essentially the content of {DSI1, DSI2, DSI3} .

Since different MCHs have different MSAP occasion periods, as shown in Figure 10, the DSI of some MCHs may appear in different unified scheduling periods as follows:

160ms, {start/end, start/end, start/end, start/end, start/end, start/end}

320ms, {start/end}

480ms, {start/end, start/end}

640ms, {start/end}

In the first MSAP occasion period, UE can know the resource allocation of 6 services; in the second MSAP occasion period, UE knows that only one MCH (ie MCH1) has DSI, so as to obtain the subframe resource allocation of services 1 and 2 Information; in the third MSAP occasion period, UE knows that there are 2 MCHs (MCH1 and MCH2) with DSI, so as to obtain the subframe resource allocation information of services 1, 2, 3, and 4; in the fourth MSAP occasion period, UE It is known that only one MCH (MCH1) has DSI, so as to obtain the subframe resource allocation information of services 1 and 2.

Without loss of generality, let me give another example. When there are 5 MCHs (MCH1, MCH2,...MCH5), assuming that there are 2 services on each MCH, the total service is {service1, service2,....service10}, and the MSAP occasion period of each MCH is {320, 160, 480, 640, 160}.

The UE obtains the MSAP occasion period of each MCH from the MCCH, and can know which MCH DSI content is included in different MSAP occasion periods, DSI-new, such as in the third MSAP occasion period, DSI-new Include For the dynamic scheduling information of MCH1, MCH2, and MCH5, DSI-new={start/end, start/end, start/end, start/end, start/end, start/end}, UE can know that they are service1, service2, MBSFN subframe allocation information of service3, service4, service9, service10, MCH3 and MCH4 have no DSI.

In an MBSFN area, the UE may only be interested in one MBMS service on one MCH, and the UE does not need to read the subframe resource allocation information of the MBMS service on each MCH in the DSI-new content. The UE knows which MCH the service it is interested in is on according to the MCCH message, and then knows the MSAP occasion period of the MCH according to the MCCH message, and can read DSI-new at the number of unified scheduling periods that carry its DSI. The UE can read the MCCH to obtain which MCH the service it is interested in is on, and in which unified scheduling period it reads the DSI-new. When the UE reads the content of the DSI-new, it can skip the MCH and MTCH that it is not interested in, and directly Read the subframe allocation information of the MTCH it is interested in.

For example, there are N MCHs in one MBSFN area, and there are M services carried on each MCH. The information is configured on the MCCH message and arranged in sequence as 1-M services on MCH1, and 1-M services on MCH2. M services, ... 1 to M services on the MCH-N. In this way, if a certain UE is interested in the i-th MBMS service, it will receive the DSI of the MBMS service according to the following process, as shown in Figure 11:

Step 1100: The UE determines the receiving period (that is, determines on which unified scheduling periods the UE reads the DSI-new) according to the MSAP occasion period of the MCH carrying the i services and the sending period of the DSI-new, wherein the determined The DSI-new content sent on the receiving cycle must include the DSI content of the MCH;

Step 1101: UE reads the i-th MBMS service it is interested in in the DSI-new content in the determined receiving cycle:

In this step, when the UE reads the i-th MBMS service, the UE needs to know that among the multiple MCHs before the MCH carrying the i-th MBMS service (in the list of all MCHs configured on the MCCH message, the sequence number of the MCH before the MCH sequence number several MCHs), which MCH DSIs also appear in the DSI-new. Specifically, the UE can know whether the DSI-new is in the unified scheduling period by reading the MSAPoccasion period of all MCHs in the MCCH message. DSI content including these MCHs;

Afterwards, the UE can skip directly without reading the DSI content of these MCHs, and directly read the MBSFN subframe allocation information of the MBMS service on the DSI of the MCH carrying the service it is interested in.

For the above steps 1100 and 1101, a formula can be used to illustrate it vividly. Suppose there are N MCHs (1, 2, n, ..., N) in an MBSFN area, and the business carried on each MCH is (1, 2 ,...M) _n . The service i that the UE is interested in is on the nth MCH (MCH-n). On a DSI-new that carries the DSI of an MCH-n, the DSIs of k MCHs before the MCH-n are also carried on the DSI-new. At the same time, the MBSFN subframe allocation of each service adopts the start/end of the same bit length, which is equal to the MSAPoccasion period of the MCH carrying it. For example, when the MSAPoccasionperiod is equal to 320ms, 8 bits can be used.

First of all: UE starts from the DSI-new start bit, skips A byte length, and can reach the DSI content of the nth MCH of the i-th service, where:

A＝n1*Bit ₁ +n2*Bit ₂ +....+nk*Bit _k

In the above formula: n1 indicates the total number of services that appear on the first MCH before the first MCH in the new DSI, n1*Bit ₁ indicates the total length of the DSI of the first MCH, and so on, nk indicates How many services appear on the k-th MCH before the MCH in DSI-new? nk*Bit _k indicates the total length of the DSI of the k-th MCH. Since the MSAPoccasion period of each MCH can be different, MCH The bit length Bit (start/end) allocated to the MBSFN subframe of the above service can be different, and n1, n2...nk can be discontinuous, because DSI content without one or more MCHs is allowed on DSI-new.

Second: the UE skips the length of B bytes again, and reads the subframe allocation information of the i-th service. in:

B=r*Bit(start/end).

The i-th service is carried on each MCH (for example: the n-th MCH), and there are m services in total on the MCH, and r services are carried on the MCH before the i-th service (r<m). r*Bit represents the total byte length allocated by r services.

In a word, according to the MCCH message, the UE can know which unified scheduling period to read DSI-new, and can only read the MBSFN subframe allocation information of the service it is interested in. For example, if only interested in service5, the UE needs to read DSI-new in the first unified scheduling period, and the subframe resource configuration information of service5 will not be carried in other unified scheduling periods.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (20)

1. One kind the transmission dynamic scheduling information (DSI) method, it is characterized in that this method comprises:

   Network equipment is gone up the DSI that sends main MCH at the main Multicast Channel (MCH) that carries multicast control channel (MCCH), send the DSI of other MCH on other MCH except described main MCH respectively, the DSI of described other MCH all adopts same Modulation and Coding Scheme (MCS);

   Subscriber equipment receives the DSI of main MCH on described main MCH, receive the DSI of other MCH on described other MCH respectively, and wherein, described subscriber equipment is according to the DSI of described other MCH of same MCS decoding.
2. 2. the method for claim 1 is characterized in that,

   The same MCS that DSI adopted of described other MCH is the MCS of described MCCH, and described subscriber equipment obtains the MCS of MCCH from system broadcast message, with the DSI of described other MCH that decode; Perhaps

   The same MCS that DSI adopted of described other MCH is the MCS that disposes on the system broadcast message, decode the then DSI of described other MCH of described subscriber equipment reading system broadcast and the MCS that obtains DSI.
3. 3. method as claimed in claim 1 or 2 is characterized in that,

   The MCS that the DSI of described main MCH adopts is the MCS of described MCCH, and described subscriber equipment obtains the MCS of MCCH from system broadcast message, with the DSI of the described main MCH that decodes; Perhaps

   The MCS that the DSI of described main MCH adopts is the MCS that disposes on the system broadcast message, decode the then DSI of described main MCH of described subscriber equipment reading system broadcast and the MCS that obtains DSI.
4. 4. method as claimed in claim 3 is characterized in that,

   The MCS that the DSI of described main MCH adopts is that the MCS of described MCCH refers to, the MCS that the DSI of described main MCH adopts is always identical with the MCS of described MCCH; Perhaps

   Only described main MCH carry described MCCH during, the MCS that the DSI of described main MCH adopts is identical with the MCS of described MCCH.
5. One kind the transmission dynamic scheduling information (DSI) method, it is characterized in that this method comprises:

   Network equipment is merged into a new DSI with the DSI of all-multicast channel (MCH), and goes up the described new DSI of transmission at the main MCH that carries multicast control channel (MCCH);

   Subscriber equipment receives described new DSI on described main MCH.
6. 6. method as claimed in claim 5 is characterized in that,

   Described new DSI adopts the identical MCS of Modulation and Coding Scheme (MCS) with described MCCH, and described subscriber equipment obtains the MCS of MCCH from system broadcast message, with the described new DSI that decodes; Perhaps

   Described new DSI adopts the MCS that disposes on the system broadcast message, described subscriber equipment reading system broadcast and the MCS that the obtains DSI described new DSI that decodes then.
7. 7. method as claimed in claim 6 is characterized in that,

   MCS that described new DSI adopts and the identical finger of MCS of described MCCH, the MCS that described new DSI adopts is always identical with the MCS of described MCCH; Perhaps

   Only described main MCH carry described MCCH during, the MCS that described new DSI adopts is identical with the MCS of described MCCH.
8. 8. as claim 5,6 or 7 described methods, it is characterized in that,

   The transmission cycle of described new DSI is the greatest common divisor of the dispatching cycle of the DSI of all MCH in the sub-district, perhaps is the least common multiple of dispatching cycle of the DSI of all MCH.
9. 9. method as claimed in claim 8 is characterized in that,

   Described subscriber equipment receives in the described new DSI process, if receive only its during the DSI of interested multimedia broadcasting and multicast service (MBMS), according to carrying its dispatching cycle of a MCH of interested MBMS business, and the transmission cycle of described new DSI, determine the receiving cycle of described new DSI, and in the receiving cycle of determining, receive described new DSI;

   Wherein, the DSI that comprises a described MCH among the new DSI that receives in the described receiving cycle.
10. 10. method as claimed in claim 9 is characterized in that,

    When described subscriber equipment receives new DSI in described receiving cycle,, skip M byte length from the original position of new DSI, begin to read its sub-frame allocation information of interested MBMS business;

    Wherein, M=n1*Bit ₁+ n2*Bit ₂+ ... .+nk*Bit _k+ r*Bit;

    N1 represents to appear among the new DSI a described MCH the 1st MCH before and goes up total total what business, n1*Bit ₁The total length of representing the DSI of the 1st MCH, and the like, nk represents to appear among the new DSI described MCH k MCH before and goes up total total what business, nk*Bit _kThe total length of representing the DSI of k MCH, r represent that a described MCH go up to send the number of the MBMS business of described carrying before the user's interest MBMS business, and r*Bit represents r professional the byte length of distribution altogether.
11. 11. the system of a transmission dynamic scheduling information (DSI) is characterized in that this system comprises network equipment and subscriber equipment, wherein:

    Described network equipment, be used for going up the DSI that sends main MCH at the main Multicast Channel (MCH) that carries multicast control channel (MCCH), send the DSI of other MCH on other MCH except described main MCH respectively, the DSI of described other MCH all adopts same Modulation and Coding Scheme (MCS);

    Described subscriber equipment is used on described main MCH receiving the DSI of main MCH, receives the DSI of other MCH on described other MCH respectively, and wherein, described subscriber equipment is according to the DSI of described other MCH of same MCS decoding.
12. 12. system as claimed in claim 11 is characterized in that,

    Described network equipment, the same MCS that DSI adopted of other MCH that send on described other MCH is the MCS of described MCCH, perhaps the MCS for disposing on the system broadcast message;

    Described subscriber equipment is used for obtaining from system broadcast message the MCS of MCCH, with the DSI of described other MCH that decode, perhaps obtains the DSI of the MCS that is used for DSI and described other MCH that decode from system broadcast message.
13. 13. as claim 11 or 12 described systems, it is characterized in that,

    Described network equipment, the MCS that DSI adopted of the main MCH that sends on described main MCH is the MCS of described MCCH, perhaps the MCS for disposing on the system broadcast message;

    Described subscriber equipment is used for obtaining from system broadcast message the MCS of MCCH, with the DSI of the described main MCH that decodes, and perhaps reading system broadcast and the MCS that the obtains DSI DSI of described main MCH that decodes then.
14. 14. system as claimed in claim 13 is characterized in that,

    The MCS that the DSI of described main MCH adopts is that the MCS of described MCCH refers to, the MCS that the DSI of described main MCH adopts is always identical with the MCS of described MCCH; Perhaps

    Only described main MCH carry described MCCH during, the MCS that the DSI of described main MCH adopts is identical with the MCS of described MCCH.
15. 15. the system of a transmission dynamic scheduling information (DSI) is characterized in that this system comprises network equipment and subscriber equipment, wherein:

    Described network equipment is used for the DSI of all-multicast channel (MCH) is merged into a new DSI, and goes up the described new DSI of transmission at the main MCH that carries multicast control channel (MCCH);

    Described subscriber equipment is used for receiving described new DSI on described main MCH.
16. 16. system as claimed in claim 15 is characterized in that,

    Described network equipment, the new DSI that sends on described main MCH adopts the identical MCS of Modulation and Coding Scheme (MCS) with described MCCH, perhaps adopts the MCS that disposes on the system broadcast message;

    Described subscriber equipment obtains the MCS of MCCH from system broadcast message, with the described new DSI that decodes, and perhaps reading system broadcast and the MCS that the obtains DSI described new DSI that decodes.
17. 17. system as claimed in claim 16 is characterized in that,

    MCS that described new DSI adopts and the identical finger of MCS of described MCCH, the MCS that described new DSI adopts is always identical with the MCS of described MCCH; Perhaps

    Only described main MCH carry described MCCH during, the MCS that described new DSI adopts is identical with the MCS of described MCCH.
18. 18. as claim 15,16 or 17 described systems, it is characterized in that,

    The transmission cycle of described new DSI is the greatest common divisor of the dispatching cycle of the DSI of all MCH in the sub-district, perhaps is the least common multiple of dispatching cycle of the DSI of all MCH.
19. 19. system as claimed in claim 18 is characterized in that,

    Described subscriber equipment, in receiving described new DSI process, only be used to receive its DSI of interested multimedia broadcasting and multicast service (MBMS), and according to carrying its dispatching cycle of a MCH of interested MBMS business, and the transmission cycle of described new DSI, determine the receiving cycle of described new DSI, in the receiving cycle of determining, receive described new DSI;

    Wherein, the DSI that comprises a described MCH among the new DSI that receives in the described receiving cycle.
20. 20. system as claimed in claim 19 is characterized in that,

    Described subscriber equipment when receiving new DSI in described receiving cycle, from the original position of new DSI, is skipped M byte length, begin to read its sub-frame allocation information of interested MBMS business;

    Wherein, M=n1*Bit ₁+ n2*Bit ₂+ ... .+nk*Bit _k+ r*Bit;

    N1 represents to appear among the new DSI a described MCH the 1st MCH before and goes up total total what business, n1*Bit ₁The total length of representing the DSI of the 1st MCH, and the like, nk represents to appear among the new DSI described MCH k MCH before and goes up total total what business, nk*Bit _kThe total length of representing the DSI of k MCH, r represent that a described MCH go up to send the number of the MBMS business of described carrying before the user's interest MBMS business, and r*Bit represents r professional the byte length of distribution altogether.

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