WO2014005450A1

WO2014005450A1 - Transmission block size determination method and device, and synchronization method, device, and system

Info

Publication number: WO2014005450A1
Application number: PCT/CN2013/073899
Authority: WO
Inventors: 陈宪明; 关艳峰; 袁弋非; 罗薇
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-04-18
Filing date: 2013-04-08
Publication date: 2014-01-09
Also published as: CN103378924A; CN103378924B

Abstract

Disclosed are a transmission block size determination method and device, and synchronization method, device, and system, the synchronization method comprising: an eNB obtaining the number of frequency domain physical resource blocks (PRBs) and the modulation and coding scheme (MCS) index of an UE; determining the size of a temporary transmission block according to the number of frequency domain PRBs and the MCS index; determining, according to the size of the temporary transmission block and/or the size of the transmission time interval (TTI) bundling, the scale factor for the size of the TTI bundling; determining, according to the scale factor and the size of the temporary transmission block, the size of a TTI bundling transmission block; notifying the UE the scale factor of the size of the TTI bundling transmission block, the number of the frequency domain PRBs, and the MCS index, or notifying the UE the number of the frequency domain PRBs and the MCS index, and triggering the UE to synchronize the transmission block size. The present invention solves the synchronization problem of the size of TTI bundling transmission blocks, thereby enhancing uplink coverage.

Description

The present invention relates to the field of communications, and in particular to a method and apparatus for determining a transport block size, a synchronization method, a device, and a system. BACKGROUND OF THE INVENTION With the rapid development of wireless communication technologies, limited spectrum resources have gradually become the most important factor restricting the development of wireless communications, but it is the limited spectrum resources that have stimulated the emergence of new technologies. Capacity and coverage are two important performance metrics in wireless communication systems. In the existing Long Term Evolution (LTE) system, in order to enhance the uplink data channel coverage performance, a variety of advanced technologies have been adopted, including: (1) Inter-Cell Interference in a small interval Coordination (referred to as ICIC), such as High Interference Indication (HII) and Overload Indication (01); (2) Multiple Input Multiple Output (MIMO), for example Space Diversity (referred to as SD) and Beamforming (BF for short); (3) Coordinated Multiple Point (CoMP), which is a technology developed based on MIMO, such as cooperative scheduling. Coordinated Scheduling/Coordinated Beamforming (CS/CB for short) and Joint Receiver (JR). Due to the current network and the user equipment (User Equipment, UE for short) are single antennas in the future, MIMO and CoMP technologies have limited improvement on the uplink. In the existing LTE system, although various techniques have been used to improve the uplink transmission performance, especially the uplink coverage performance, the medium-speed physical uplink shared channel (Physical Uplink Shared Channel) is found through current network testing and simulation. , abbreviated as PUSCH) is still a channel with limited coverage performance in each channel, because the transmission power of the UE is limited. This puts new demands on the performance of uplink medium rate coverage. In order to further improve the uplink medium rate coverage, the transmission time interval bundle (Transmission Time)

Internal Bundling (TTI Bundling for short) has been proposed. The TTI Bundling scheme refers to a scheduler that allocates more than one radio resource to a UE. The basic idea of the scheme is to allow the UE to continuously transmit the same Transmission Block (TB) Redundancy Version (RV) continuously on the ΤΉ. Specifically, FIG. 1 is an uplink using a TTI Bundling scheme according to the related art. Transmission diagram, as shown in Figure 1, by adding Cyclic Redundancy Check (CRC) bits, Channel Coding (CC) and Rate Matching (RM) processes Four RVs (RV0 to RV3) associated with a TB are generated; then, the above four RVs (RV0 to RV3) are transmitted on successive four ΤΉ (TTI n to ΤΤΙ n+3 ), respectively. Compared with the traditional solution, the TTI Bundling scheme supports transmitting a transport block with a larger Transmission Block Size (TBS), thereby obtaining a codec gain, saving control overhead, and finally implementing uplink coverage. improve. In order to ensure that the enhanced TB (evolved NodeB, eNB for short) correctly decodes the TB, the corresponding TBS synchronization must be accurately implemented between the eNB and the UE. However, how to synchronize the transport block size when using TTI Bundling for data transmission in the related art There is currently no effective and simple solution. SUMMARY OF THE INVENTION The present invention provides a method for synchronizing and determining a transport block size, so as to at least solve the problem that the transport block size cannot be synchronized when data transmission is performed by using TTI Bundling in the related art. According to an aspect of the present invention, a method for synchronizing a transport block size is provided, including: a base station (eNB) acquiring a frequency domain physical resource block number of a user equipment (UE) and a modulation coding scheme index of the UE; The frequency domain physical resource block number and the modulation and coding scheme index determine a temporary transport block size; and determine a size factor of a TTI Bundling transport block size according to the temporary transport block size and/or a transmission time interval bundle (TTI Bundling) size The TTI Bundling size is a number of consecutive transmission time intervals 执行 performing TTI Bundling; the eNB determines the TTI Bundling transport block according to the scale factor of the TTI Bundling transport block size and the temporary transport block size The eNB notifies the UE of the size factor of the TTI Bundling transport block size, the number of the frequency domain physical resource block, and the modulation and coding scheme index, or the eNB performs the frequency domain physical resource. Notifying the UE of the number of blocks and the modulation and coding scheme index, triggering the UE to perform synchronization of the TTI Bundling transport block size Preferably, the acquiring, by the eNB, the TTI Bundling transport block size according to the TTI Bundling transport block size scale factor and the temporary transport block size comprises: determining, by the eNB, that the TTI Bundling transport block size is the TTI Bundling transport block The product of the size factor of the size and the size of the temporary transport block. Preferably, the TTI Bundling transport block size has a scale factor greater than or equal to the number of consecutive transmission time intervals 执行 in which the TTI Bundling is performed. Preferably, the size factor of the TTI Bundling transport block size is notified to the UE by the eNB by using a radio resource control RRC message or a downlink control information format DCI. Preferably, the determining, by the eNB, the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index, the eNB determining, according to the modulation and coding scheme index and the first correspondence, a transport block index, the eNB. Determining the temporary transport block size according to the _{S S} , the frequency domain physical resource block number ⁷ and the second correspondence relationship. Preferably, the first correspondence is a mapping relationship from a modulation coding scheme index to a modulation order β« and a transport block size index; the second correspondence is from the transport block size index and the frequency domain physics The number of resource blocks ^ ^ to the temporary transport block size mapping relationship. According to still another aspect of the present invention, a method for determining a transport block size includes: acquiring, by a user equipment (UE), a number of frequency domain physical resource blocks of the UE, a modulation coding scheme index of the UE, and a transmission time interval bundle ( ΤΉ Bundling) a scaling factor of a transport block size, wherein the scale factor of the TTI Bundling transport block size is determined according to a temporary transport block size and/or a TTI Bundling size, where the TTI Bundling size The number of consecutive transmission time intervals TTIs for performing TTI Bundling; the UE determining the temporary transmission block size according to the frequency domain physical resource block number and the modulation and coding scheme index, and according to the TTI Bundling transmission block size The scale factor and the temporary transport block size determine the TTI Bundling transport block size. Preferably, the determining, by the UE, the TTI Bundling transport block size according to the TTI Bundling transport block size scale factor and the temporary transport block size comprises: determining, by the UE, that the TTI Bundling transport block size is the TTI Bundling transport block The product of the size factor of the size and the size of the temporary transport block. Preferably, the TTI Bundling transport block size has a scale factor greater than or equal to the number of consecutive transmission time intervals 执行 in which the TTI Bundling is performed. Preferably, the UE acquires a scale factor of the TTI Bundling transport block size by: receiving a radio resource control RRC message; receiving a downlink control information format DCI; and the UE according to the frequency domain physical resource block number and The modulation and coding scheme index determines the temporary transport block size, and determines a scale factor of the transport block size according to the temporary transport block size and/or the TTI Bundling size. Preferably, the determining, by the UE, the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index, the determining, by the UE, the transport block according to the modulation and coding scheme index and the first correspondence relationship the index of the physical resource blocks UE ^^ domain and a second corresponding relationship between the temporary transport block size determining the ^ _S, according to the frequency. Preferably, the first correspondence is a mapping relationship from a modulation coding scheme index to a modulation order ^β TM and a transport block size index; the second correspondence is a slave transport block size index and the frequency domain physical resource block Number ^ to the mapping relationship of the temporary transport block size. According to another aspect of the present invention, a synchronization device for transmitting a block size is provided, which is applied to a base station (eNB), and includes: a first acquiring module, configured to acquire a frequency domain physical resource block number of the user equipment UE, and the UE And a first determining module, configured to determine a temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index; and the second determining module is configured to be according to the temporary transport block size and/or Or a transmission time interval bundle TTI Bundling size determining a size factor of a TTI Bundling transport block size, where the TTI Bundling size is a number of consecutive transmission time intervals TTI for performing TTI Bundling; and a third determining module, configured to be according to the TTI Determining a size factor of the Bundling transport block size and the temporary transport block size to determine the TTI Bundling transport block size; a notification module, configured to set a size factor of the TTI Bundling transport block size, the frequency domain physical resource block number, and The modulation coding scheme index is notified to the UE, or the number of physical resource blocks and the frequency domain are The modulation and coding scheme index is notified to the UE, and the UE is triggered to perform synchronization of the TTI Bundling transport block size. Preferably, the first determining module includes: a first determining unit, configured to determine a transport block index according to the modulation and coding scheme index and the first correspondence; a second determining unit, configured to perform index according to the modulation and coding scheme, The number of the frequency domain physical resource block and the second correspondence relationship determine a size of the temporary transmission block; the first correspondence relationship is a mapping relationship from a modulation and coding scheme index to a modulation order and the transport block size index; The second correspondence is a mapping relationship from the transport block size index and the number of frequency domain physical resource blocks to the temporary transport block size. According to still another aspect of the present invention, a device for determining a transport block size is provided, which is applied to a user equipment UE, and includes: a second acquiring module, configured to acquire a frequency domain physical resource block number of the UE, and a modulation and coding scheme of the UE Index and transmission time interval bundle size factor of the TTI Bundling transport block size, wherein the scale factor of the ΤΉ Bundling transport block size is determined according to a temporary transport block size and/or a transmission time interval bundle TTI Bundling size, where The TTI Bundling size is a number of consecutive transmission time intervals 执行 performing TTI Bundling; the fourth determining module is configured to determine a temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index; And a module configured to determine a TTI Bundling transport block size according to a scale factor of the TTI Bundling transport block size and the temporary transport block size. Preferably, the fourth determining module includes: a third determining unit, configured to determine a transport block index according to the modulation and coding scheme index and the first correspondence; a fourth determining unit, configured to perform index according to the modulation and coding scheme, The frequency domain physical resource block number and the second correspondence relationship determine a size of the temporary transport block; the first pair The relationship should be a mapping from the modulation coding scheme index to the modulation order and the transport block size index; the second correspondence is from the transport block size index and the frequency domain physical resource block number to the temporary The mapping relationship of the transport block size. According to still another aspect of the present invention, there is provided a transmission block size synchronization system comprising the above-described transport block size synchronizing apparatus and the above-described transport block size determining means. Through the present invention, the eNB may determine the temporary transport block size by using the frequency domain physical resource block number and the modulation and coding scheme index, and then determine the TTI Bundling transport block size according to the determined size factor of the TTI Bundling transport block size and the size of the temporary transport block. And transmitting the parameters to the UE for synchronization, which solves the problem that the transmission block size cannot be synchronized when using TTI Bundling for data transmission in the related art, thereby improving the uplink coverage when using TTI Bundling for data transmission. effect. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of uplink transmission using a TTI Bundling scheme according to the related art; FIG. 2 is a flowchart of a method for synchronizing transport block sizes according to an embodiment of the present invention; FIG. 3 is a transmission according to an embodiment of the present invention. FIG. 4 is a block diagram showing a structure of a synchronization block of a transport block size according to an embodiment of the present invention; FIG. 5 is a block diagram showing a preferred structure of a transport block size synchronizing apparatus according to an embodiment of the present invention; 6 is a structural block diagram of a device for determining the size of a transport block according to an embodiment of the present invention; FIG. 7 is a block diagram showing a preferred configuration of a device for determining the size of a transport block according to an embodiment of the present invention; and FIG. 8 is a transmission according to an embodiment of the present invention. Block diagram of the block size synchronization system. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. This embodiment provides a method for synchronizing a transport block size. FIG. 2 is a flowchart of a method for synchronizing transport block sizes according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps S202 to S206. Step S202: The eNB acquires the number of frequency domain physical resource blocks of the UE and the modulation and coding scheme index of the UE. Step S204: The eNB determines a temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index, and determines a size factor of the TTI Bundling transport block size according to the temporary transport block size and/or the TTI Bundling size, where The TTI Bundling size is the number of consecutive TTIs that perform TTI Bundling. Step S206: The eNB determines a TTI Bundling transport block size according to the TTI Bundling transport block size scale factor and the temporary transport block size. Step S208: The eNB notifies the UE of the TTI Bundling transport block size scale factor, the frequency domain physical resource block number, and the modulation and coding scheme index, or the eNB notifies the UE of the frequency domain physical resource block number and the modulation and coding scheme index, and triggers the UE. Synchronize the TTI Bundling transport block size. Through the above steps, the eNB may determine the temporary transport block size by using the frequency domain physical resource block number and the modulation and coding scheme index, and then determine the scale factor of the TTI Bundling transport block size according to the temporary transport block size and/or the TTI Bundling size, and also according to the TTI Bundling. The size factor of the transport block size and the size of the temporary transport block determine the TTI Bundling transport block size, and the parameters are sent to the UE for synchronization, thereby realizing the synchronization of the TTI Bundling transport block size, overcoming the related art, using TTI Bundling In the manner of data transmission, the problem of synchronization of the TTI Bundling transport block size cannot be achieved, and the effect of improving the uplink coverage when transmitting by TTI Bundling is achieved. In implementation, the TTI Bundling transport block size may be obtained according to the TTI Bundling transmission requirement, and the TTI Bundling transport block size may be determined by using the TTI Bundling transport block size scale factor and the temporary transport block size. For example, the eNB may determine the ΤΉ Bundling transport block size as the TTI Bundling transport block. The product of the size factor of the size and the size of the temporary transport block. This embodiment has relatively small modifications to the prior art and is relatively simple to implement. The TTI Bundling transport block size scale factor can be selected as needed. Preferably, the TTI Bundling transport block size has a scale factor greater than or equal to the number of consecutive transmission time intervals TTI for performing TTI Bundling. Preferably, in the foregoing preferred embodiment, the size factor of the TTI Bundling transport block size may be notified to the UE by the eNB through a (RRC) message or a preset downlink control information format (DCI). This preferred embodiment increases the diversity of scale factors that transmit TTI Bundling transport block sizes. In an implementation, the eNB may determine the temporary transmission block size according to the frequency domain physical resource block number and the modulation and coding scheme index in multiple manners. Preferably, the eNB may adopt the following manner: The code scheme index (/ _Mes ) and the first correspondence determine a transport block index (/ _ras ); then the eNB determines the size of the temporary transport block according to the / _Mes , the frequency domain physical resource block number (N _PM ), and the second correspondence relationship . Preferably, the first correspondence is a mapping relationship from the modulation and coding scheme index / _Mes to the modulation order β „ and the transport block size index I _TBS , and the mapping relationship as shown in Table 1 may be adopted: Table 1

Wherein, G _m is a modulation order; the second correspondence is a mapping relationship from the transport block size index ^ and the number of the frequency domain physical resource blocks to the temporary transport block size, for example, as shown in Table 2 The mapping relationship shown. Table 2

6 328 176 256 392 504 600 712 808

7 104 224 328 472 584 712 840 968

8 120 256 392 536 680 808 968 1096

9 136 296 456 616 776 936 1096 1256

10 144 328 504 680 872 1032 1224 1384

11 176 376 584 776 1000 1192 1384 1608

12 208 440 680 904 1128 1352 1608 1800

13 224 488 744 1000 1256 1544 1800 2024 Based on the same concept as the above-described preferred embodiment, on the UE side, the present embodiment provides a method for determining a transport block size, and FIG. 3 is a transport block size according to an embodiment of the present invention. A flowchart of the determination method, as shown in FIG. 3, the method includes the following steps S302 to S306. Step S302: The UE acquires a size factor of the number of the physical frequency resource blocks of the UE, the UE modulation and coding scheme index, and the ΤΉ Bundling transport block size, where the size factor of the TTI Bundling transport block size is based on the temporary transport block size and/or The TTI Bundling is sized, wherein the TTI Bundling size is the number of consecutive ticks that perform TTI Bundling. Step S304: Determine the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index. Step S306: The UE determines the TTI Bundling transport block size according to the scale factor of the TTI Bundling transport block size and the temporary transport block size. Through the above steps, the UE determines the size of the temporary transport block by using the received frequency domain physical resource block number and the modulation and coding scheme index, and then determines the TTI Bundling transport block size according to the TTI Bundling transport block size scale factor and the size of the temporary transport block. The synchronization of the TTI Bundling transport block size on the UE side and the base station side is overcome, which overcomes the problem that the transmission block size synchronization under the TTI Bundling cannot be realized in the related art, thereby achieving the effect of using TTI Bundling to improve the uplink coverage. In implementation, the TTI Bundling transport block size may be obtained according to the TTI Bundling transmission requirement, and the TTI Bundling transport block size may be determined by using the TTI Bundling transport block size scale factor and the temporary transport block size. For example, the eNB may determine the ΤΉ Bundling transport block size as the TTI Bundling transport block. The product of the size factor of the size and the size of the temporary transport block. This embodiment has relatively small modifications to the prior art and is relatively simple to implement. The TTI Bundling transport block size scale factor can be selected as needed. Preferably, the TTI Bundling transport block size has a scale factor greater than or equal to the number of consecutive transmission time intervals TTI for performing TTI Bundling. Preferably, in the above preferred embodiment, the scaling factor of the TTI Bundling transport block size is obtained by one of the following methods: Manner 1: Receive Radio Resource Control (RRC) message; Method 2: Receive downlink control information format DCI; Method 3: The UE determines the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index, according to the temporary transport block size And/or TTI Bundling size determines the scale factor of the transport block size. This preferred embodiment increases the diversity of scale factors that transmit TTI Bundling transport block sizes. In an implementation, the UE may determine the temporary transmission block size according to the frequency domain physical resource block number and the modulation and coding scheme index in multiple manners. Preferably, the UE may adopt the following manner: The UE may perform index according to the modulation and coding scheme (^ _s ) and the first correspondence determine the transport block index U _TBS , and then the eNB determines the size of the temporary transport block according to the / _Mes , the frequency domain physical resource block number (N _PM ), and the second correspondence. Preferably, the first correspondence is a mapping relationship from the modulation coding scheme index I _MCS to the modulation order β „ and the transport block size index I _TBS , and the mapping relationship as shown in Table 3 may be adopted: Table 3

Wherein, G _∞ is a modulation order; the second correspondence is a mapping relationship from the transport block size index ^ and the frequency domain physical resource block number ^ ^ to the temporary transport block size, for example, as shown in Table 4 The mapping relationship shown. Table 4

It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. In another embodiment, a transport block size synchronization software is provided for performing the technical solutions described in the above embodiments and preferred embodiments. In another embodiment, a storage medium is also provided, wherein the storage block size synchronization software is stored, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like. The embodiment of the present invention further provides a synchronization device for transmitting a block size, which can be applied to a base station eNB, and the synchronization device of the transmission block size can be used to implement the synchronization method and a preferred implementation manner of the foregoing transmission block size, which has been described. For further description, the modules involved in the synchronization device of the transport block size will be described below. As used hereinafter, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the systems and methods described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated. 4 is a structural block diagram of a synchronization block of a transport block size according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes: a first obtaining module 42, a first determining module 44, a second determining module 46, and a third determining. Module 48 and notification module 49, the above structure will be described in detail below. The first obtaining module 42 is configured to acquire the number of frequency domain physical resource blocks of the UE and the modulation and coding scheme index of the UE. The first determining module 44 is connected to the first obtaining module 42 and configured to be acquired according to the first acquiring module 42. The number of the frequency domain physical resource blocks, the modulation and coding scheme index determines the size of the temporary transport block; the second determining module 46 is connected to the first determining module 44, and is set to the temporary transport block size determined by the first determining module 44 and/or Or a TTI Bundling size determining a size factor of a TTI Bundling transport block size, wherein the TTI Bundling size is a number of consecutive transmission time intervals TTI performing TTI Bundling; a third determining module 48, coupled to the first determining module 44 and the second The determining module 46 is configured to determine a TTI Bundling transport block size according to the temporary transport block size determined by the first determining module 44 and the size factor of the TTI Bundling transport block size determined by the second determining module 46; the notification module 48, connected to the first obtaining The module 42 and the second determining module 46 are arranged to set the size of the TTI Bundling transport block determined by the second determining module 46 to be large The small factor, the number of frequency domain physical resource blocks acquired by the first obtaining module 42 and the modulation and coding scheme index are notified to the UE, or the number of frequency domain physical resource blocks acquired by the first obtaining module 42 and the modulation and coding scheme index. Notifying the UE, triggering the UE to perform synchronization of the TTI Bundling transport block size. Preferably, the third determining module 48 determines that the TTI Bundling transport block size is a product of a size factor of the TTI Bundling transport block size and a size of the temporary transport block. FIG. 5 is a block diagram showing a preferred structure of a transport block size synchronizing apparatus according to an embodiment of the present invention. As shown in FIG. 5, the first determining module 44 includes: a first determining unit 442 and a second determining unit 444, which are described below. The structure is described in detail. The first determining unit 442 is configured to determine a transport block index / _ras according to the modulation and coding scheme index I _MC and the first correspondence relationship _{; the} second determining unit 444 is connected to the first determining unit 442, and is configured to be configured according to the first determining unit 442. The determined / _Mes , the number of frequency domain physical resource blocks N _PM and the second correspondence determine the size of the temporary transport block. In still another embodiment, a software for determining the size of a transport block for performing the technical solutions described in the above embodiments and preferred embodiments is also provided. In another embodiment, a storage medium is provided, wherein the storage medium has the above-mentioned transport block size determining software, including but not limited to: an optical disc, a floppy disk, a hard disk, a rewritable memory, and the like. The embodiment of the present invention further provides a device for determining the size of a transport block, which can be applied to a UE, and the device for determining the size of the transport block can be used to implement the method for determining the size of the transport block, and a preferred implementation manner. Further, the modules involved in the apparatus for determining the size of the transport block will be described below. As used hereinafter, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the following examples The described systems and methods are preferably implemented in software, but hardware, or a combination of software and hardware, is also possible and contemplated. FIG. 6 is a structural block diagram of a device for determining a size of a transport block according to an embodiment of the present invention. As shown in FIG. 6, the device includes: a second obtaining module 62, a fourth determining module 64, and a fifth determining module 66, The above structure will be described in detail. The second obtaining module 62 is configured to acquire a frequency factor physical resource resource block of the UE, a modulation coding scheme index of the UE, and a size factor of a TTI Bundling transport block size, where the scale factor of the TTI Bundling transport block size is based on the temporary transmission The block size and/or the TTI Bundling size is determined, wherein the TTI Bundling size is the number of consecutive TTIs that perform TTI Bundling; the fourth determining module 64 is coupled to the second obtaining module 62, and configured to be acquired according to the second obtaining module 62. The number of the frequency domain physical resource blocks and the modulation and coding scheme index determine the size of the temporary transmission block. The fifth determining module 66 is connected to the second obtaining module 62 and the fourth determining module 64, and is configured to be acquired according to the second obtaining module 62. The TTI Bundling transport block size scale factor and the temporary transport block size determined by the fourth determining module 64 determine the TTI Bundling transport block size. FIG. 7 is a block diagram showing a preferred structure of a device for determining the size of a transport block according to an embodiment of the present invention. As shown in FIG. 7, the fourth determining module 64 includes: a third determining unit 642 and a fourth determining unit 644, The above structure is described in detail. The third determining unit 642 is configured to determine a transport block index / _ras according to the modulation and coding scheme index I _MC and the first correspondence relationship _{; the} fourth determining unit 644 is connected to the third determining unit 642 and configured to be configured according to the third determining unit 642 The determined / _Mes , the number of physical resource blocks N _PRB and the second correspondence determine the size of the temporary transport block. The embodiment also provides a synchronization system for transporting block size. FIG. 8 is a structural block diagram of a synchronization system for transporting block size according to an embodiment of the present invention. As shown in FIG. 8, the system includes: a synchronization device for transporting block size. 2 and a transmission block size determining device 4, wherein the structure of the transport block size synchronizing device 2 is as shown in FIG. 4 or 5, and the structure of the transport block size determining device 4 is as shown in FIG. 6 or 7, and is no longer Narration. The following description will be made in conjunction with the preferred embodiments, and the following preferred embodiments incorporate the above-described embodiments and preferred embodiments. The first embodiment of the present invention provides a method for synchronizing a TTI Bundling TBS. In this embodiment, the preset TTI Bundling size is 4, that is, the number of consecutive MIMOs performing TTI Bundling is 4; Sounding Reference Signal (SRS); It is assumed that the eNB acquires the current channel state between the UE and the eNB by measuring the above SRS; it is assumed that the eNB has no cooperation with the neighboring eNB. The method includes the following steps S402 to S424. Step S402: The eNB determines that the current channel quality is lower than a certain threshold. Step S404: The eNB enables the TTI Bundling operation, and notifies the UE by using a Radio Resource Control (RRC) message carrying the "Enable TTI Bundling Flag" control signaling. The TTI Bundling flag is set to "1". , indicates that the TTI Bundling operation is enabled. Step S406: The UE receives and parses the RRC message, and obtains the “Enable TTI Bundling Flag” control signaling. Step S408: The eNB acquires a frequency domain physical resource block to be allocated for the UE according to the current channel state.

(Physical Resource Block, PRB) Number N _PRB and modulation coding scheme (Modulation and Coding)

Scheme, MCS) index / _Mes ; where the frequency domain PRB number represents the resource block allocated in the frequency domain (Resource

Block, abbreviated as RB), usually consists of multiple frequency domain subcarriers per RB. Step S410: The eNB acquires the TBS index/ _ras according to the MCS index/ _Mes and Table 5. Table 5 PUSCH modulation, TBS cable bow I table

Note: 0 „ indicates the modulation order. Step S412: The eNB acquires a temporary transport block size (Temporary TBS, abbreviated as T-TBS) according to the frequency domain PRB number N _ra2} , the TBS index / _ras, and the following Table 6.

Table 6 TBS Table (Dimensions 27 X 110)

Step S414: The eNB determines a Scaling Factor (SF) of the TTI Bundling TBS according to the preset TTI Bundling size and/or T-TBS, and determines a TTI Bundling TBS according to the SF and B T-TBS. Specifically, SF = j] (Sizem Bundling, SlZe _{T -} TBs) ^ or, SF = f ₂ iSize _T TI Bundling ) ^ SF = f ₃ i ize _{T -} TBs) where ^feejT/a^tog represents TTI Bundling The size, 5fee7i7a5 represents T-TBS, , f ₂ and respectively represent different mapping relationships. The SF is determined by one of the following methods: determining SF according to Si _{ZeiTIBum g} ; determining SF according to Sizer-TBS; determining SF according to Sizem Bundling and Size _T - _TBS . Specifically, the implementation of /, / ₂ and can be:

Size _T THh

SF = (Size _{TTI Bunding} , Size _T — ) = Size _{TTI Bunding} - [l + ^ - max

THh

Size _T — TBS TH2

SF = f Size _T — _TBS ) = C + K _: max 0, TBS

TH2 TBS where K ₂ and C represent constant factors, TH1 _TBS and rffiras represent transport block size thresholds, and max represents maximum operations. Preferably, the mapping relationship can also be implemented by looking up a table. Specifically, the TBS is made equal to the product of SF and T-TBS. Step S416: The eNB notifies the UE of the frequency domain PRB number N _PRB and the MCS index I _MCS . For example, the eNB notifies the UE through the DCI format 0; the DCI format 0 is used for the scheduling of the PUSCH, and is carried by the Physical Downlink Control Channel (PDCCH). Specifically, the DCI format 0 includes at least the fields shown in Table 7. Wherein the number of _PRB N PRB in the frequency domain is described by "resource block allocation and resource allocation Hopping" field, the MCS index / _Mes is described by "modulation, coding scheme and redundancy coding" field. Table 7 DCI format 0

Format 0 and format 1A distinguishes the flag (lbit)

Hopping logo (lbit)

Resource block allocation and Hopping resource allocation (related to bandwidth)

Modulation, coding scheme and redundant coding (5bit)

New data indication (lbit)

Transmission power control command of scheduled PUSCH (2bit)

Solving the cyclic shift of the pilot Gbit)

Uplink subframe number (applies to time division duplex mode)

Channel quality indication request (lbit) Step S418: The UE receives and parses the DCI format 0, and obtains the frequency domain PRB number N and MCS cable bow |

I MCS Step S420: The UE acquires the TBS cable II _TBS according to the MCS index I _MCS and Table 1. Step S422: The UE acquires the T-TBS according to the frequency domain PRB number N _PRB , the TBS cable II _TBS and the table 2 . Step S424: The UE determines that the TTI Bundling operation is enabled according to the foregoing “Enable TTI Bundling Flag”; determines a TTI Bundling TBS SF according to the preset TTI Bundling size and/or T-TBS, and determines a TTI according to the SF and the T-TBS. Bundling TBS. Specifically, SF = fi iSizem Bundling, Size _{T -} TBs) ^ or, SF = f ₂ iSize _T TI Bundling) ^ SF = f ₃ i. Size _{T -} TBs) \ where ^feema^tog represents the TTI Bundling size, Size _T -TBS 3⁄4 T-TBS , , f ₂ and respectively represent different mapping relationships. The SF is determined by one of the following methods: determining SF according to Si _Z e _{TTj mdH} „ _g ; determining SF according to Size _T −TBS; determining SF according to Sizem Bundling and Size _T − _TBS . It should be noted that the UE uses the same mapping as the eNB. Specifically, the TBS is equal to the product of the SF and the T-TBS. In this embodiment, a preferred embodiment of determining the TTI Bundling TBS SF according to the preset ΤΉ Bundling size and/or T-TBS is used, which needs to be explained. In the implementation, a mode different from the preferred embodiment may be adopted. The synchronization between the eNB and the UE is implemented by the TTI Bundling TBS by using the foregoing steps in the embodiment. The second embodiment of the present invention provides a TTI. In the present embodiment, the preset TTI Bundling size is 4, that is, the number of consecutive ΤΉs performing TTI Bundling is 4; assume that the UE transmits the SRS; The current channel state between the eNBs; the eNB is not cooperating with the neighboring eNBs. The method includes the following steps S502 to S524. Step S502: The eNB determines that the current channel quality is lower than a certain threshold; Step S504: The eNB enables the TTI Bundling operation, and notifies the UE by using an RRC message carrying the "Enable TTI Bundling Flag" and the "Tcal Bundling TBS Scaling Factor (SF)" control signaling; The TTI Bundling flag is "1", indicating that the TTI Bundling operation is enabled; preferably, the eNB determines the TTI Bundling TBS SF according to the preset TTI Bundling size and/or the previous T-TBS statistics; preferably, the TTI Bundling TBS SF The STI is greater than or equal to the preset TTI Bundling size; Step S506: The UE receives and parses the RRC message, and obtains the “Enable TTI Bundling Flag” and the “TTI Bundling TBS SF” control signaling. Step S508: The eNB obtains according to the current channel state. The frequency domain PRB number N _ra2} and the MCS index/ _Mes allocated to the UE are prepared; wherein the frequency domain PRB number represents the number of RBs allocated in the frequency domain, and usually each RB is composed of multiple frequency domain subcarriers. Step S510: The eNB acquires the TBS index/ _ras according to the MCS index/ _Mes and the table 1; Step S512: The eNB acquires the T-TBS according to the frequency domain PRB number N _PffS , the TBS index, and the table 2; Step S514: The eNB acquires the TBS according to the TTI Bundling TBS SF and the T-TBS; specifically, the TBS is equal to the product of the TTI Bundling TBS SF and the T-TBS; Step S516: The eNB notifies the UE of the frequency domain PRB number N _PRB and the MCS index I _{the MCS;} specifically, the eNB notifies the UE through a DCI format 0; DCI format 0 is used for PUSCH scheduling, and carries on the physical downlink control channel PDCCH. Specifically, the DCI format 0 includes at least a field as shown in Table 3. Wherein the frequency domain is described by the PRB H "Hopping resource block allocation and resource allocation 'field, the MCS index / _Mes is described by" modulation, coding scheme and redundancy coding "field. Step S518: The UE receives and parses the DCI format 0, and obtains the frequency domain PRB number N _PRB and MCS cable bow|

IMCS; Step S520: The UE acquires the TBS index/ _ras according to the MCS index/ _Mes and the table 1; Step S522: The UE acquires the T-TBS according to the frequency domain PRB number N _PRB , the TBS cable II _TBS and the table 2; Step S524 The UE judges that the TTI Bundling operation is enabled according to the "Enable TTI Bundling Flag", and acquires the TBS according to the TTI Bundling TBS SF and the T-TBS. For example: TBS is equal to the product of TTI Bundling TBS SF and T-TBS. In this embodiment, the TTI Bundling TBS SF is notified by the eNB through the RRC message. Through the above steps of the embodiment, the synchronization between the eNB and the UE by the TTI Bundling TBS is implemented. The third embodiment of the present invention provides a TTI Bundling TBS synchronization method. In this embodiment, the preset ΤΉ Bundling size is 4, that is, the number of consecutive TTIs that perform TTI Bundling is 4; It is assumed that the eNB acquires the current channel state between the UE and the eNB by measuring the above SRS; it is assumed that the eNB has no cooperation with the neighboring eNB. The method includes the following steps S602 to S624. Step S602: The eNB determines that the current channel quality is lower than a certain threshold; Step S604: The eNB enables the TTI Bundling operation; Step S606: The eNB acquires the frequency domain PRB number N _ra2} and the MCS index/ _Mes to be allocated for the UE according to the current channel state. The frequency domain PRB number indicates the number of RBs allocated in the frequency domain, usually each RB is more The frequency domain subcarriers are formed. Step S608: The eNB acquires the TBS index/ _ras according to the MCS index/ _Mes and the table 5; Step S610: According to the frequency domain? ! ^^, TBS index / _ras and Table 6 obtain T-TBS; Step S612: The eNB determines TTI Bundling TBS SF according to the preset TTI Bundling size and/or T-TBS, and according to the TTI Bundling TBS SF and T- The TBS acquires the TBS; preferably, the TTI Bundling TBS SF is greater than or equal to the preset TTI Bundling size; preferably, the TBS is equal to the product of the TTI Bundling TBS SF and the T-TBS. Step S614: The eNB notifies the UE of the frequency domain PRB number N _PRB , the MCS index I _MCS , the enable TTI Bundling flag, and the TTI Bundling TBS SF. Specifically, the eNB notifies the UE by using the improved DCI format 0; the improved DCI format 0 is also used for scheduling of the PUSCH, and is carried by the physical downlink control channel PDCCH. Specifically, the DCI format 0 includes at least a field as shown in Table 8. The frequency domain PRB H is described by a "resource block allocation and a Hopping resource allocation" field, and the MCS index / _Mes is described by a "modulation, coding scheme, and redundancy coding" field, enabling the TTI Bundling flag by "Enable TTI Bundling" Flag "Field Description, TTI Bundling TBS SF by" TTI Bundling TBS

SF" field description. Table 8 Improved DCI format 0

Format 0 and format 1A distinguishes the flag (lbit)

Hopping logo (lbit)

Modulation, coding scheme and redundant coding (5bit)

New data indication (lbit)

Transmission power control command of scheduled PUSCH (2bit)

Solving the cyclic shift of the pilot (3bit)

Uplink subframe number (applies to time division duplex mode)

Channel quality indication request (lbit)

_ Enable TTI Bundling logo (lbit)

_ TTI Bundling TBS SF (future decision) Step S616: The UE receives and parses the DCI format 0, and obtains the frequency domain PRB number N _PRB , the MCS index I _MCS , the enable TTI Bundling flag, and the TTI Bundling TBS SF. Step S618: The UE acquires the TBS index / _ras according to the MCS index / _Mes and the table 5. Step S620: The UE acquires the T-TBS according to the frequency domain PRB number N _PRB , the TBS cable II _TBS, and the table 6. Step S622: The UE determines that the TTI Bundling operation is enabled according to the "Enable TTI Bundling Flag", and acquires the TBS according to the TTI Bundling TBS SF and the T-TBS. Specifically, TBS is equal to the product of TTI Bundling TBS SF and T-TBS. In this embodiment, the TTI Bundling TBS SF is notified by the eNB to the UE through DCI format 0. Through the above steps of the embodiment, the synchronization between the eNB and the UE by the TTI Bundling TBS is implemented. Through the foregoing embodiments, a method for synchronizing, determining, and determining a transport block size is provided. The eNB may determine a temporary transport block size by using a frequency domain physical resource block number and a modulation and coding scheme index, and then, according to the determined TTI Bundling transport block. The size factor of the size and the size of the temporary transport block, determine the TTI Bundling transport block size, and send the parameter to the UE for synchronization, which solves the problem that the transmission block size synchronization under the TTI Bundling cannot be realized in the related art, and further The effect of using TTI Bundling to improve the uplink coverage is achieved. The method is simple to implement, has low control overhead and good backward compatibility. It should be noted that these technical effects are not all of the above embodiments, and some technical effects are obtained by some preferred embodiments. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A method of synchronizing transport block sizes, comprising:

The base station eNB acquires the number of frequency domain physical resource blocks of the user equipment UE and the modulation and coding scheme index of the UE;

Determining, by the eNB, a temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index; and determining a TTI Bundling transport block size according to the temporary transport block size and/or the transmission time interval bundle TTI Bundling size a scale factor, where the TTI Bundling size is a number of consecutive transmission time intervals TTIs for performing TTI Bundling;

Determining, by the eNB, the TTI Bundling transport block size according to a scale factor of the TTI Bundling transport block size and the temporary transport block size;

And the eNB notifies the UE of the TTI Bundling transport block size scale factor, the frequency domain physical resource block number, and the modulation and coding scheme index, or the eNB uses the frequency domain physical resource block number And the modulation and coding scheme index is notified to the UE, and the UE is triggered to perform synchronization of the TTI Bundling transport block size.

2. The method according to claim 1, wherein the acquiring, by the eNB, a TTI Bundling transport block size according to a size factor of the TTI Bundling transport block size and the temporary transport block size comprises:

The eNB determines that the TTI Bundling transport block size is a product of a scale factor of the TTI Bundling transport block size and the temporary transport block size.

3. The method according to claim 2, wherein

The scale factor of the TTI Bundling transport block size is greater than or equal to the number of consecutive transmission time intervals TTI for performing TTI Bundling.

4. The method according to claim 3, wherein

The scale factor of the TTI Bundling transport block size is notified to the UE by the eNB by using a radio resource control RRC message or a downlink control information format DCI.

The method according to any one of claims 1 to 4, wherein the determining, by the eNB, the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index comprises: Determining, by the eNB, a transport block index ^J / ¹ TBS - ' according to the modulation and coding scheme index / _Mes and the first correspondence relationship

The eNB according to the / _Mes, the number of physical resource blocks in the frequency domain and N _PM second correspondence determining said temporary transport block size. The method according to claim 5, wherein the first correspondence is a mapping relationship from a modulation coding scheme index / _Mes to a modulation order 0 „ and a transport block size index / _ras ; the second correspondence is a slave a mapping relationship between the transport block size index/ _ras and the number of the frequency domain physical resource blocks to the temporary transport block size. A method for determining a transport block size, including:

The user equipment UE acquires the frequency domain physical resource block number of the UE, the modulation coding scheme index of the UE, and the size factor of the transmission time interval bundle TTI Bundling transport block size, where the scale factor of the ΤΉ Bundling transport block size is based on the temporary The transport block size and/or the transmission time interval bundle TTI Bundling size is determined, wherein the TTI Bundling size is a number of consecutive transmission time intervals TTI for performing TTI Bundling;

Determining, by the UE, the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index, and determining a TTI Bundling transmission according to the TTI Bundling transport block size scale factor and the temporary transport block size. Block size. The method according to claim 7, wherein the determining, by the UE, the TTI Bundling transport block size according to the size factor of the TTI Bundling transport block size and the temporary transport block size comprises:

The UE determines that the TTI Bundling transport block size is a product of a scale factor of the TTI Bundling transport block size and the temporary transport block size. The method according to claim 8, wherein

The scale factor of the TTI Bundling transport block size is greater than or equal to the number of consecutive transmission time intervals TTI for performing TTI Bundling. The method according to claim 9, wherein

The UE acquires a scale factor of the TTI Bundling transport block size by using one of the following manners: receiving a radio resource control RRC message; Receiving a downlink control information format DCI;

Determining, by the UE, the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index, and determining a size of the transport block size according to the temporary transport block size and/or the ΤΉ Bundling size factor.

The method according to any one of claims 7 to 10, wherein the determining, by the UE, the temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index comprises:

Determining, by the UE, a transport block index according to the modulation and coding scheme index/ _Mes and the first correspondence relationship

ITBS;

The UE determines the temporary transport block size according to the I _MCS , the frequency domain physical resource block number N _PRB, and the second correspondence relationship.

12. The method according to claim 11, wherein the first correspondence is a mapping relationship from a modulation coding scheme index / _Mes to a modulation order 0 „ and a transport block size index / _ras ; the second correspondence A mapping relationship from the transport block size index / _ras and the frequency domain physical resource block number N _PM to the temporary transport block size.

A synchronization device for transmitting a block size, which is applied to a base station eNB, and includes:

a first acquiring module, configured to acquire a frequency domain physical resource block number of the user equipment UE and an index of a modulation and coding scheme of the UE;

a first determining module, configured to determine a temporary transport block size according to the frequency domain physical resource block number and the modulation and coding scheme index;

a second determining module, configured to determine a size factor of a TTI Bundling transport block size according to the temporary transport block size and/or a transmission time interval bundle TTI Bundling size, where the TTI Bundling size is a continuous transmission time for performing TTI Bundling The number of interval TTIs;

a third determining module, configured to determine the TTI Bundling transport block size according to a scale factor of the TTI Bundling transport block size and the temporary transport block size;

a notification module, configured to notify the UE of a scale factor of the TTI Bundling transport block size, the frequency domain physical resource block number, and the modulation and coding scheme index, or the number of the frequency domain physical resource block and The modulation and coding scheme index is notified to the UE, and the UE is triggered to perform synchronization of the TTI Bundling transport block size.

The device according to claim 13, wherein the first determining module comprises: a first determining unit, configured to determine a transport block index according to the modulation and coding scheme index and the first correspondence;

a second determining unit, configured to determine a size of the temporary transport block according to the modulation and coding scheme index, the frequency domain physical resource block number, and the second correspondence relationship;

The first correspondence is a mapping relationship from a modulation coding scheme index to a modulation order and the transport block size index;

The second correspondence is a mapping relationship from the transport block size index and the number of frequency domain physical resource blocks to the temporary transport block size.

A device for determining a size of a transport block, which is applied to a user equipment UE, and includes:

a second acquiring module, configured to acquire a frequency factor physical resource resource block of the UE, a modulation coding scheme index of the UE, and a scaling factor of a transmission time interval bundle TT1 Bundling transport block size, where the TT1 Bundling transport block size scale factor And determining, according to the temporary transport block size and/or the transmission time interval bundle TT1 Bundling size, where the ΤΉ Bundling size is the number of consecutive transmission time intervals TTI for performing TTI Bundling;

a fourth determining module, configured to determine a temporary transport block size according to the number of the frequency domain physical resource blocks and the modulation and coding scheme;

And a fifth determining module, configured to determine a TTI Bundling transport block size according to the scale factor of the TTI Bundling transport block size and the temporary transport block size.

The device according to claim 15, wherein the fourth determining module comprises: a third determining unit, configured to determine a transport block index according to the modulation and coding scheme index and the first correspondence;

a fourth determining unit, configured to determine a size of the temporary transport block according to the modulation and coding scheme index, the frequency domain physical resource block number, and the second correspondence relationship;

A transmission block size synchronizing system comprising a transport block size synchronizing apparatus according to claim 13 or 14, and a transport block size determining apparatus according to claim 15 or 16.