WO2012152214A1

WO2012152214A1 - Transmission parameter indication/transmission parameter determination method and device

Info

Publication number: WO2012152214A1
Application number: PCT/CN2012/075188
Authority: WO
Inventors: 孙云锋; 李儒岳; 郭森宝; 陈艺戬
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-05-09
Filing date: 2012-05-08
Publication date: 2012-11-15
Also published as: CN102781098A

Abstract

Disclosed are a transmission parameter indication/transmission parameter determination method and device. The transmission parameter indication method includes: performing combined coding on transmission parameters to generate a parameter indication signaling, wherein the transmission parameters include: the number of the layer being transmitted, descrambling sequence identity, antenna port, and pilot overhead; and sending the parameter indication signaling to user equipment by way of downlink control information. By way of the technical solution provided by the present invention, the problem in the prior art that the orthogonal transmission of only 2 layers can be realized between two nodes in the SU-MIMO mode maximally is solved, thus achieving the effect of supporting the transmission in the same cell in case of realizing orthogonality in more demodulation pilots among a plurality of users.

Description

The present invention relates to the field of communications, and in particular to a method and apparatus for determining a transmission parameter indication/transmission parameter. In a wireless communication technology, when a base station side (for example, an evolved Node B or an eNB) transmits data using multiple antennas, spatial multiplexing may be adopted to increase the data transmission rate, that is, the same time-frequency resource is used at the transmitting end. Different data is transmitted at different antenna positions, and the receiving end (for example, user equipment UE) also receives data using a plurality of antennas. In the case of a single user, resources of all antennas are allocated to the same user. The user occupies the physical resources allocated by the base station side in a single transmission interval. This type of transmission is called single-user multiple-input and multiple-out (Single User Multiple- Input Multiple-Output (SU-MIMO); in the case of multiple users, space resources of different antennas are allocated to different users, and one user and at least one other user share physical resources allocated by the base station side in one transmission interval. The sharing mode may be a space division multiple access mode or a space division multiplexing mode. The transmission mode is called Multiple User Multiple-Input Multiple-Output (MU-MIMO), where the base station side allocates Physical resources refer to time-frequency resources. If the transmission system is to support both SU-MIMO and MU-MIMO, the eNB needs to provide the UE with data in these two modes. When the UE is in the SU-MIMO mode or the MU-MIMO mode, it is necessary to know the rank (Rank) used by the eNB to transmit MIMO data for the UE. In SU-MIMO mode, all antenna resources are allocated to the same user, and the number of layers used to transmit MIMO data is equal to the rank used by the eNB to transmit MIMO data. In MU-MIMO mode, the number of layers used for one user transmission is small. The total number of layers of MIMO data transmitted by the eNB, if the SU-MIMO mode and the MU-MIMO handover are to be performed, the eNB needs to notify the UE of different control data in different transmission modes. The following three types of downlink physical control channels are defined in the Release 8 standard of the Long-Term Evolution (LTE): Physical Control Format Indicator Channel (PCFICH), physical The Hybrid Automatic Retransmission Request Indicator Channel (PHICH) and the Physical Downlink Control Channel (PDCCH). The PDCCH is used to carry downlink control information (Downlink Control Information, DCI for short), and includes: uplink and downlink scheduling information, and uplink power control information. The DCI format (DCI format) is divided into the following types: DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3 and P DCI format 3 A, etc.; support defined in version 8 MU-MIMO transmission mode using 5 downlink control information DCI format ID, and the DCI format ID field in the downlink power (Downlink power offset field, expressed as a. _WCT _. _Ffset) for indicating to the MU-MIMO mode One user's power is halved (ie, -lOloglO(2)), because MU-MIMO transmission mode 5 only supports MU-MIMO transmission for two users. Through this downlink power domain, MU-MIMO transmission mode 5 can support SU. - Dynamic switching of MIMO mode and MU-MIMO mode, but this DCI format supports only one stream transmission for one UE regardless of SU-MIMO mode or MU-MIMO mode, although LTE Release 8 supports up to two in transmission mode 4. Streaming single-user transmission, but since the switching between transmission modes can only be semi-static, dynamic switching of single-user multi-stream transmission and multi-user transmission cannot be achieved in LTE Release 8. In Release 9 of LTE, in order to enhance downlink multi-antenna transmission, a dual-stream beamforming (Beamforming) transmission mode is introduced, and downlink control information is added to DCI format 2B to support this transmission mode, in DCI format 2B. There is an identification bit of Scrambling Identity (SCID) to support two different scrambling code sequences, and e B can allocate the two scrambling code sequences to different users and multiplex multiple resources in the same resource. user. In addition, when only one transport block is enabled, the New Data Indication (DI) bit corresponding to the non-enabled (Transabled) transport block is also used to indicate the antenna port when transmitting in a single layer. In Release 10 of LTE, in order to further enhance downlink multi-antenna transmission, transmission mode 9 is introduced, and transmission mode 9 is further enhanced to a maximum of 8 in support of dual-stream beamforming (mode 8) in LTE version 9. The beam transmission of the layer transmission is added, and the downlink control information is added to the DCI format 2C to support the transmission mode. In the DCI format 2C, the SCID, the number of layers, and the antenna port are designed and coded by joint coding, and The SCID bit used in mode 8 to indicate the scrambling code sequence identity is used. Similarly, when only one transport block is enabled, the new data indication corresponding to the non-enabled (Transabled) transport block

The (DI) bit is also used to indicate the antenna port for single layer transmission. In version 10, each port is orthogonalized by an Orthogonal Cover Code (OCC). The allocation of OCC codes on different ports (ports 7 to 14) can be unified as shown in Table 1. Different orthogonal frequency division multiplexing

(Orthogonal Frequency Division Multiplexing, abbreviated as OFDM) symbol / 'On the way to use ^ eight

According to the formula, where ' = 0, l, 2, component I

The relative position of the demodulation pilot from low to high for each physical time-frequency resource block in FIG. 2, ^ corresponds to the physical time-frequency resource for the physical downlink shared channel (Physical Downlink Share Channel, PDSCH) transmission. index. Table 1

Although transmission mode 9 can support up to 8 layers of data transmission in SU-MIMO mode, it does not enhance MU-MIMO compared to mode 8, that is, it can only support two users at most and only 1 per user. Demodulation pilots in the case of layer transmission are orthogonal. At the same time, since the demodulation reference signal on which the transmission mode 9 depends is generated according to the cell identity, and in mode 8 and mode 9, the demodulation pilot pattern positions between different nodes are the same, at the cell edge. The pilots between users with different nodes occupying the same resource cannot be orthogonal, which is not conducive to the elimination of interference. In a heterogeneous network, the macro cell and the low power node (LPN) have serious interference. In LTE Release 11, it is proposed to reduce interference between a macro cell and a low power node by using centralized scheduling in a heterogeneous network in such a manner that the macro cell and the low power node adopt the same cell identity. Based on the DCI format 2C corresponding to mode 9, only two layers of orthogonal transmission can be realized between two nodes, that is, each node can only transmit by one layer, and the orthogonality of the demodulation pilot can be realized. Limiting the gain brought by cell splitting, an effective solution has not been proposed for this problem. SUMMARY OF THE INVENTION The present invention provides a transmission parameter indication/transmission parameter determination method and apparatus to solve at least one of the above problems. According to an aspect of the present invention, a transmission parameter indication method is provided, including: jointly coding a transmission parameter to generate parameter indication signaling, where the transmission parameter includes: a number of layers to be transmitted, a scrambling code sequence identity, an antenna port, and a guide. The frequency overhead is sent to the user equipment by using the downlink control information. Performing joint coding on the transmission parameters to generate the parameter indication signaling includes: determining a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted according to the transmission parameter, and generating parameter indication signaling according to the mapping manner. Determining the layer-to-antenna port mapping manner based on the transmission parameter of the user equipment-specific reference signal includes: determining the layer-to-antenna port mapping manner according to the following formula: When only one layer is transmitted,

Where is the modulation symbol of layer 0, which is the data of the corresponding port pre-coded by the corresponding layer, {0, 4, 5, 7, 8, 9, 10:}, = 0, l, ..., M^ _b — l, M^ _b = l , Λ is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, the layer-to-port mapping is _y ⁾ () = x ⁽⁾ (), where is the layer The modulation symbol of j is the data corresponding to the corresponding port of the corresponding layer, and the corresponding port is indicated by the indication signaling, o^j^v-\, V is the number of layers, = 0, l, ..., M _b - 1, ^^ =^ , M^ _b is the number of modulation symbols to be transmitted on the current layer. After performing the joint coding of the transmission parameter to generate the parameter indication signaling, the method further includes: indicating, according to the size of the allocated port number, a orthogonal mask despreading length, when the allocated maximum port number is greater than the first threshold, the user equipment adopts the first The orthogonal mask of the length, when the allocated maximum port number is less than or equal to the first threshold, the user equipment adopts an orthogonal mask of the first length or the second length, wherein the first length is greater than the second length. Coding the transmission parameters to generate the parameter indication signaling includes: when only one transport block is enabled, the new data indication bit corresponding to the non-enabled transport block is used for joint coding. According to another aspect of the present invention, a transmission parameter indication apparatus is provided, including: a joint coding module, configured to jointly encode a transmission parameter to generate parameter indication signaling, where the transmission parameter includes: a number of layers to be transmitted, and a scrambling code The sequence identity, the antenna port, and the pilot overhead; the signaling sending module is configured to send the parameter indication signaling to the user equipment by using downlink control information. The joint coding module includes: a signaling design unit, configured to determine a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted according to the transmission parameter, and generate parameter indication signaling according to the mapping manner. The signaling design unit determines a method of mapping a layer to an antenna port based on a user equipment specific reference signal transmission, including: determining a layer to antenna port mapping manner according to the following formula: when only one layer is transmitted,

Where is the modulation symbol of layer 0, which is the data of the corresponding port pre-coded by the corresponding layer, {0, 4, 5, 7, 8, 9, 10:}, = 0, l, ..., M^ _b — l, M^ _b = l , Λ is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, the layer-to-port mapping is _y ⁾ () = x ⁽⁾ (), where is the layer The modulation symbol of j is the data corresponding to the corresponding port of the corresponding layer, and the corresponding port is indicated by the indication signaling, o^j^v-\, V is the number of layers, = 0, l, ..., M _b - 1,^^ =^ , M ^X L is the number of modulation symbols to be transmitted on the current layer. The device further includes: a mask indication module, configured to indicate an orthogonal mask despreading length according to the size of the allocated port number, and when the allocated maximum port number is greater than the first threshold, the user equipment adopts a first length orthogonal mask The user equipment adopts an orthogonal mask of a first length or a second length, wherein the first length is greater than the second length, when the allocated maximum port number is less than or equal to the first threshold. The joint coding module further includes: a bit reuse unit configured to use the new data indication bit corresponding to the non-enabled transport block for joint coding when only one transport block is enabled. According to still another aspect of the present invention, a method for determining a transmission parameter is provided, including: receiving, by a user equipment, a parameter indication signaling sent by a transmission parameter indication device by using downlink control information; and determining, by the user equipment, a transmission parameter configuration according to the parameter indication signaling The parameter indication signaling is generated by the transmission parameter indication device by jointly coding the transmission parameter, where the transmission parameter includes: a number of layers to be transmitted, a scrambling code sequence identity, an antenna port, and a pilot overhead. Performing joint coding on the transmission parameters to generate the parameter indication signaling includes: determining a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted according to the transmission parameter, and generating parameter indication signaling according to the mapping manner. A method for determining a layer-to-antenna port mapping manner based on a user equipment-specific reference signal transmission according to a transmission parameter includes: determining a layer-to-antenna port mapping manner according to the following formula: when only one layer is transmitted,

Where is the modulation symbol of layer 0, which is the data of the corresponding port pre-coded by the corresponding layer, {0, 4, 5, 7, 8, 9, 10:}, = 0, l, ..., M^ _b — l, M^ _b = l , Λ is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, the layer-to-port mapping is _y ⁾ () = x ⁽⁾ (), where is the layer The modulation symbol of j is the data of the corresponding port pre-coded by the corresponding layer, and the corresponding port is indicated by the indication signaling, o^j^v-\, V is the number of layers, = 0, l, ..., M _b - 1,^^ =^ ,

M^ _b is the number of modulation symbols to be transmitted on the current layer. After the user equipment determines the transmission parameter configuration according to the parameter indication signaling, the method further includes: determining an orthogonal mask despreading length according to the size of the allocated port number, and adopting the first length when the allocated maximum port number is greater than the first threshold. The orthogonal mask, when the allocated maximum port number is less than or equal to the first threshold, adopts an orthogonal mask of the first length or the second length, wherein the first length is greater than the second length. Coding the transmission parameters to generate the parameter indication signaling includes: when only one transport block is enabled, the new data indication bit corresponding to the non-enabled transport block is used for joint coding. According to still another aspect of the present invention, a transmission parameter determining apparatus is provided, including: a signaling receiving module, configured to receive parameter indication signaling sent by a transmission parameter indication device by using downlink control information; and a parameter determining module configured to be according to the foregoing The parameter indication signaling determines the transmission parameter configuration, where the parameter indication signaling is generated by the transmission parameter indication device by jointly coding the transmission parameter, where the transmission parameter includes: the number of layers to be transmitted, the identity of the scrambling code sequence, the antenna port, Pilot overhead. The transmission parameter indication device determines a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted according to the transmission parameter, and generates parameter indication signaling according to the mapping manner. The method for determining, by the transmission parameter indicating means, the layer-to-antenna port mapping manner when transmitting based on the user equipment-specific reference signal comprises: determining the layer-to-antenna port mapping manner according to the following formula: When only one layer is transmitted, WW=JC ^{(q) )} (/;), where /) is the modulation symbol of layer 0, which is the data of the corresponding port after precoding the corresponding layer, {0,4,5,7,8,9,10:}, = 0,l ,...,M^ _b — l,M^ _b = l , Λ is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, the layer-to-port mapping is _y ⁾ () = x ^{( )} (), where j is the layer of the modulation symbols, corresponding to the data port corresponding to layer after precoding is indicated by the corresponding port indicator signaling, o ^ j ^ v- \, V is the number of layers, = 0, l,...,M _b - 1,^^ =^ , M^ _b is the number of modulation symbols to be transmitted on the current layer. The device further includes: a mask determining module, configured to determine an orthogonal mask despreading length according to the size of the allocated port number, and when the allocated maximum port number is greater than the first threshold, adopting a first length orthogonal mask, When the allocated maximum port number is less than or equal to the first threshold, an orthogonal mask of the first length or the second length is adopted, wherein the first length is greater than the second length. When only one transport block is enabled, the transmission parameter indicating means uses the new data indication bit corresponding to the non-enabled transport block for joint coding. The present invention solves the problem that the transmission parameter of the transmission layer, the scrambling code sequence identity, the antenna port, the pilot overhead, and the like are jointly encoded to generate parameter indication signaling, and the downlink control information is sent to the user equipment. In the technology, in SU-MIMO mode, only two layers of orthogonal transmission can be realized between two nodes, thereby achieving more demodulation pilot orthogonality between multiple users supporting the same cell. The effect of the transmission in case. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flowchart of a transmission parameter indication method according to an embodiment of the present invention; FIG. 2 is a demodulation pilot pattern of OCC=2 in a normal cyclic prefix in LTE Release 10 according to an example of the present invention; Is a demodulation pilot pattern of OCC=4 in a normal cyclic prefix in LTE Rel-10 according to an example of the present invention; FIG. 4 is a structural block diagram of a transmission parameter indication apparatus according to an embodiment of the present invention; FIG. 5 is a preferred embodiment according to the present invention. FIG. 6 is a flowchart of a transmission parameter determining method according to an embodiment of the present invention; FIG. 7 is a structural block diagram of a transmission parameter determining apparatus according to an embodiment of the present invention; A structural block diagram of the transmission parameter determining apparatus of the embodiment. 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. 1 is a flow chart of a transmission parameter indication method according to an embodiment of the present invention. As shown in FIG. 1 , a transmission parameter indication method according to an embodiment of the present invention includes: Step S102: Jointly coding a transmission parameter to generate parameter indication signaling, where the transmission parameter includes: a number of layers to be transmitted, a scrambling code sequence identity, and an antenna. Port and pilot overhead; Step S104: Send the parameter indication signaling to the user equipment by using downlink control information. The parameter indication method, when indicating the transmission parameter of the user equipment, jointly encodes the parameters of the number of layers, the scrambling code sequence identity, the antenna port, and the pilot overhead to generate parameter indication signaling, and then sends the parameter to the user through the downlink control information. device. Since the above method participates in the joint coding as the transmission parameter as the transmission parameter, the pilot overhead can be selected more flexibly, so that more layers of demodulation pilot orthogonal transmission are supported between multiple users. Preferably, step S102 may further include a process of determining a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted according to the foregoing transmission parameter, and generating parameter indication signaling according to the mapping manner. After jointly coding the transmission parameters such as the number of layers to be transmitted, the scrambling code sequence identity, the antenna port, and the pilot overhead, the mapping of the layer to the antenna port based on the specific reference signal transmission of the user equipment can be determined, for example, When the number of layers is V, if its corresponding port is {p^p^^^J, the layer ( ₀ i vl) corresponds to the port _Pi . Then, the parameter indication signaling can be designed according to the corresponding manner, and finally the parameter indication signaling is generated. Preferably, determining a mapping manner of the layer to the antenna port when transmitting based on the user equipment specific reference signal according to the transmission parameter may include: determining a layer to antenna port mapping manner according to the following formula: when only one layer is transmitted, /; JC ^(q) (/;), where is the modulation symbol of layer 0, which is the data of the corresponding port after precoding the corresponding layer, {0,4,5,7,8,9,10}, i = 0, l,...,M^ _b -1 ,M _s ^ =M^ _h , M is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, the layer-to-port mapping is ^ W = x ^{( )} W is, wherein the modulation symbols of layer j, corresponding to the data port corresponding to precoded layer, the corresponding signaling port indicated by the pointer, o ^ j ^ vl, V is the number of layers, = 0, ..., Μ _1, Μ = Λ , is the number of modulation symbols to be transmitted on the current layer. Through the above formula, the mapping mode of the layer to the antenna port based on the specific reference signal transmission of the user equipment can be determined, and the basis for constructing the parameter indication signaling is provided. Preferably, after step S102, the method further includes the following steps: indicating an orthogonal mask despreading length according to the size of the allocated port number, and when the allocated maximum port number is greater than the first threshold, the user equipment adopts orthogonality of the first length. The mask, when the allocated maximum port number is less than or equal to the first threshold, the user equipment adopts an orthogonal mask of the first length or the second length, where the first length is greater than the second length. The orthogonal mask despreading length can be implicitly indicated by the assigned maximum port number. Since the larger the assigned maximum port number, the longer the OCC length required, a threshold (first threshold) can be set. When the assigned maximum port number is greater than the threshold, a longer OCC (first length) is used. Orthogonal mask), when the assigned maximum port number is less than or equal to the threshold, a shorter OCC (second length orthogonal mask) is used, since the OCC has The backward compatible feature, therefore, it is also possible to use a longer OCC when the assigned maximum port number is less than or equal to the threshold. It should be noted that since the OCC supports a range, when the allocated maximum port number continues to increase, it is necessary to set a second threshold, a third threshold, and the like to select a longer occ. In the following examples, the length of the first length orthogonal mask is 4, and the length of the second length orthogonal mask is 2. Preferably, step S102 may further include the following processing: When only one transport block is enabled, the new data indication bit corresponding to the non-enabled transport block is used for joint coding. In the above method, since the pilot overhead parameter is added when performing joint coding, a newly added bit is required. When only one transport block is enabled, the new data indication bit corresponding to the non-enabled transport block is idle, so this bit can be reused for joint coding, thereby improving bit utilization and being easier to implement. The above preferred embodiments will be described in detail below with reference to specific examples and FIGS. 2 and 3. In the following examples, Example 1 and Example 2 are based on the pattern shown in Figure 2, and Example 3 and Example 4 are based on the pattern shown in Figure 3. FIG. 2 and FIG. 3 are mapping diagrams of a Demodulation Reference Signal (DMRS, also referred to as a Ue-specific Reference Signal) in a physical resource block (PRB). Each of the small squares represents a resource element (Resource Element, referred to as RE). It should be noted that the overhead of the demodulation reference symbols involved in the following embodiments corresponds to FIG. 2 or FIG. 3, where the 12RE overhead in Embodiments 1 and 2 corresponds to the pattern of FIG. 2(a). The 24RE overhead corresponds to the 2(b) pattern; the 12RE overhead in the embodiments 3 and 4 corresponds to the pattern of FIG. 3(a), and the 24RE overhead corresponds to the 3(b) pattern. Example 1: In this example, the following information is jointly encoded: the number of layers transmitted, the scrambling code sequence identity, the antenna port, and the demodulation reference signal overhead. The generated parameter indication signaling structure is as shown in Table 2, and the parameter indication signaling Bits 1, 2, 3, and 4 are included to indicate each piece of information. When only one transport block is enabled, the new data indication (NDI) bit corresponding to the non-enabled (Transabled) transport block can be reused for joint encoding. Table 2

With this parameter indicating signaling, orthogonal transmission of 4 layers can be realized at the maximum. Moreover, in the case of different cell identities, orthogonality can be achieved by allocating different demodulation pilot packets, and when different nodes adopt the same cell identity, orthogonalization of different layers can be realized through more flexible configuration. Based on the foregoing parameter indication signaling manner, further, the length of the orthogonal mask (OCC) can be implicitly notified by the assigned port number, and when the allocated port number includes the port 11 and the port greater than 11, the An OCC code of length 4, No. 1J uses an OCC code of OCC=2 or OCC=4. At the same time, the corresponding layer-to-antenna port corresponding mode (pre-coding mode of the antenna port based on the UE-specific reference signal) is: In the case of single-antenna port transmission, in the case of LTE compatible version 8, version 9, version 10, precoding can be further defined as WW = JC ^(<)) (/;), where; ^{0,4,5 , 7, 8, 9, 10} are the port numbers of the single antenna ports used for physical channel data transmission. When the layer 2 is transmitted based on the UE-specific reference signal, if the port indicated by the control signaling is port 7, the layer-to-port precoding relationship is; if the port indicated by the control signaling is the end

Port 9, 10, layer-to-port precoding relationship is

When the antenna port based on the UE-specific reference signal transmits more than 2 layers, the layer-to-port precoding relationship is

In the above formula, index = 0,1,... _1, M ^ =M^ _h , indicating the number of modulation symbols to be transmitted on the current layer. ^(v) (/) indicates the modulation symbol of layer V, and ^(/) indicates the corresponding port p of the corresponding layer after precoding.

In this embodiment, the port {7 8 11 13} corresponds to the DMRS position of the first group in Figure 2(b); the port {9, 10, 12, 14} corresponds to the second group in Figure 2 (b) DMRS location. Wherein the number of corresponding layers in Fig. 2(a) is less than equal to 2, the DMRS position of the port {7, 8}. Example 2: In this embodiment, the following information is jointly coded: the number of layers transmitted, the scrambling code sequence identity, the antenna port, and the demodulation reference signal overhead, and the generated parameter indication signaling structure is as shown in Table 3, and the parameter indication letter Let bits 1, 2, 3, and 4 be used to indicate each piece of information. When only one transport block is enabled, the new data indication (NDI) bit corresponding to the non-enabled (Transabled) transport block can be reused for joint encoding.

table 3

1 code 2 yards:

Code 0 吏, code 0 enable,

Code 吏 energy code 1 enable

Signaling ratio

Signaling

Special 1-3 special 1-3

With this parameter indicating signaling, orthogonal transmission of 8 layers can be realized at the maximum. Moreover, in the case that different nodes have different cell identities, orthogonality can be achieved by assigning different demodulation pilot packets, and when different nodes adopt the same cell identity, different layers can be implemented through more flexible configuration. Orthogonal. Based on the foregoing parameter indication signaling manner, further, the length of the orthogonal mask (OCC) can be implicitly notified by the assigned port number, and when the allocated port number includes the port 11 and the port greater than 11, the An OCC code of length 4, No. 1J uses an OCC code of OCC=2 or OCC=4. At the same time, the corresponding layer-to-antenna port corresponding mode (pre-coding mode of the antenna port based on the UE-specific reference signal) is: In the case of single-antenna port transmission, in the case of LTE compatible version 8, version 9, version 10, precoding can be further defined as WW = JC ^(<)) (/;), where; ^{0,4,5 , 7, 8, 9, 10} are the port numbers of the single antenna ports used for physical channel data transmission. When the antenna port based on the UE-specific reference signal transmits layer 2, if the port indicated by the control signaling is port 7, the layer-to-port precoding relationship is if the port indicated by the control signaling is port 9, 10, layer The precoding relationship to the port is

If the antenna port based on the UE-specific reference signal transmits Layer 3, if the port indicated by the control signaling is port {7, 8, 9}, the layer-to-end, if the port indicated by the control signaling is

Port {7,8,11}, layer-to-port precoding relationship is, and based on length 4 OCC

The code performs spreading/de-spreading; if the port indicated by the control signaling is port {9, 10, 12}, the layer-to-port precoding relationship is , and the spreading/de-spreading is performed based on the OCC code of length 4,

When the antenna port based on the UE-specific reference signal transmits 4 layers, if the port indicated by the control signaling is the port {7, 8, 9, 10}, the layer-to-port precoding relationship is, where v = 4;

The port indicated by the signaling is port, 8, 11, 13}, and the layer-to-port precoding relationship is

And performing spreading/de-spreading based on the OCC code of length 4; if the port indicated by the control signaling is a port

{9,10,12,14}, layer-to-port precoding relationship is, and based on length 4 OCC

Code spreading/de-spreading When the antenna port based on the UE-specific reference signal transmits more than 4 layers, the layer-to-port precoding relationship is

In the above formula, index = 0,

, Λ indicates the number of modulation symbols to be transmitted on the current layer. ^(v) (/) indicates the modulation symbol of layer V, and y^(/) indicates the data of port p corresponding to the corresponding layer precoding. In this embodiment, the port {7 8 11 13} corresponds to the DMRS position of the first group in Figure 2(b); the port {9, 10, 12, 14} corresponds to the second group in Figure 2 (b) DMRS location. Wherein the number of layers corresponding to Figure 2(a) is less than or equal to 2, the DMRS position of the port {7, 8}. Embodiment 3: In this example, the following information is jointly coded: the number of layers transmitted, the scrambling code sequence identity, the antenna port, and the demodulation reference signal overhead, and the generated parameter indication signaling structure is as shown in Table 4, the parameter indication letter Let bits 1, 2, and 3 be used to indicate each piece of information. When only one transport block is enabled, the new data indication (NDI) bit corresponding to the non-enabled (Transabled) transport block can be reused for joint encoding.

Table 4

In the table, when the number of layers is <=4, the DMRS adopts a pattern of 12 REs, and when the number of layers is >4, a pattern of 24 REs is used. Based on the above parameter indication signaling manner, further, the length of the orthogonal mask (0CC) is fixed to 4. The above-mentioned transmission parameter signaling manner is illustrated in FIG. 3, the first group of DMRS corresponding ports are {7 8 11 13 }, and the second group of ports is {9 10 12 14} as an example. In practical applications, The two groups of ports can also be the first group port {7 8 9 10}, and the second group port { 11 12 13 14}. When the grouping method described in the latter is adopted, only the table is modified according to the grouping manner. 7——7; 8——8; 11——9; 13——10; 9——11; 10—12; 12—13; 14-14. The pattern shown in FIG. 3(a) is a subset of the pattern shown in FIG. 3(b), which is a DMRS pattern when only the first group of ports is used. When the K layer is allocated, the ports are respectively ^ P^. ^J , then the layer-to-port correspondence is, layer k, 0 ≤ A ≤ f - l corresponds to the port. For example, when dual codewords are enabled, state 2 supports Layer 3 transmission, and port is {7, 8, 11 }, indicating ρ. =7, =8, ^=11; At this time, layer 0 corresponds to port 7, layer 1 corresponds to port 8, and layer 2 corresponds to port 11. Example 4: In this embodiment, one or more of the following information is jointly encoded: the number of layers transmitted, the scrambling code sequence identity, the antenna port, and the demodulation reference signal overhead, and the generated parameter indication signaling structure is as shown in the table. As shown in Figure 5, the parameter indication signaling contains bits 1, 2, 3 and 4 for indicating each information. When only one transport block is enabled, the new data indication (NDI) bit corresponding to the non-enabled (Transabled) transport block can be reused for joint coding. table 5

Further, the length of the orthogonal mask (OCC) is fixed to 4 based on the notification manner of the above-mentioned parameter indication signaling. In the foregoing transmission parameter signaling manner, in FIG. 3, the first group of DMRS corresponding ports is {7811 13}, and the second group of ports is {9101214} as an example. In practical applications, the two groups of ports are also It can be the first group port {78910}, the second group port {11121314}, when the grouping method described in the latter is adopted, only the table is modified according to the grouping manner 7-7; 8-8; 11—— 9; 13—— 10; 9—— 11; 10—12; 12—13; 14—14. The pattern shown in Fig. 3(a) is a subset of the pattern shown in Fig. 3(b), which is the DMRS pattern when only the first group of ports is used. When the K-layer is allocated the port is ^P^. ^J, then the layer-to-port correspondence is, layer k, 0 ≤ A ≤ f-l corresponds to the port. In this mode, a maximum of 4 user multiplexing (in this case, 1 or 2 layers per user) is orthogonally multiplexed; and when there is a user layer greater than 2, only 2 users are allowed to be multiplexed, and each user does not exceed 4 Floor. During the port allocation process, the number of ports used by the two groups should be the same as possible. In the configuration mode in the above table, the optimization is not performed for all retransmissions, but when considering the case where the single-codeword stream user and the dual-codeword stream user are multiplexed, only the single-codeword stream can be double-layered. Further optimization of the situation, the optimized parameters are only the signaling structure shown in Table 6, and the layer-to-port mapping manner consistent with the above is adopted. Table 6

One Codeword: Two Codewords:

Codeword 0 enabled, Codeword 0 enabled,

Codeword 1 disabled Codeword 1 enabled

0 1 layer, port {7}(12RE) 0 2 layers, port {7,8} (12RE)

1 1 layer, port {8} (12RE) 1 2 layers, port {11, 13} (12RE)

2 1 layer, port {11} (12RE) 2 2 layers, port {7,8} (24RE)

3 1 layer, port {13}(12RE) 3 2 layers, port {11,13} (24RE)

4 1 layer, port {7} (24RE) 4 2 layers, port {9,10} (24RE)

5 1 layer, port {8} (24RE) 5 2 layers, port {12,14} (24RE)

6 1 layer, port {11} (24RE) 6 3 layers, port {7811} (12RE)

It should be noted that the various correspondences in the foregoing examples (for example, the correspondence between the index after the joint coding in the table and the specific attribute, the correspondence between the antenna port and the number of layers, and the correspondence between the index of the layer and the pilot pattern) are not limited. In this unique correspondence, that is, their order can be interchangeably combined as long as one-to-one correspondence is required. Specifically, a joint encoded index corresponds to a unique specific attribute, and a specific attribute corresponds to a unique joint encoded index. The above examples are just a list of their corresponding possibilities. 4 is a block diagram showing the structure of a transmission parameter indicating apparatus according to an embodiment of the present invention. As shown in FIG. 4, the transmission parameter indication apparatus according to the embodiment of the present invention includes: a joint coding module 42 configured to jointly encode the transmission parameters to generate parameter indication signaling, where the transmission parameters include: the number of layers to be transmitted, and the scrambling code The sequence identity, the antenna port, and the pilot overhead; the signaling module 44 is coupled to the joint coding module 42 and configured to send the parameter indication signaling to the user equipment by using downlink control information. In the foregoing apparatus, when the user equipment transmits the parameter, the joint coding module 42 jointly encodes the parameters of the transmitted layer number, the scrambling code sequence identity, the antenna port, and the pilot overhead to generate parameter indication signaling, and then performs downlink control. The information is sent to the user device. Since the joint coding module 42 participates in the joint coding as the transmission parameter as the transmission parameter, the pilot overhead can be selected more flexibly, thereby supporting more layers of demodulation pilot orthogonal transmission between multiple users. Preferably, as shown in FIG. 5, the joint coding module 42 may further include: a signaling design unit 422 configured to determine a layer to antenna port mapping manner based on the user equipment specific reference signal transmission according to the foregoing transmission parameter, and The parameter indication signaling is generated according to the mapping manner. After jointly coding the transmission parameters such as the number of layers to be transmitted, the scrambling code sequence identity, the antenna port, and the pilot overhead, the mapping of the layer to the antenna port based on the specific reference signal transmission of the user equipment can be determined, for example, When the number of layers is V, if its corresponding port is {p^p^ + .p^}, the layer ( ₀ i vl) corresponds to port _Pi . Then, the parameter indication signaling can be designed according to the corresponding manner, and finally the parameter indication signaling is generated. Preferably, the signaling design unit 422 determines that the layer-to-antenna port mapping manner when transmitting based on the user equipment-specific reference signal may include: determining a layer-to-antenna port mapping manner according to the following formula: when only one layer is transmitted, /; > = JC ^(q) (/;), where is the modulation symbol of layer 0, which is the data of the corresponding port after precoding the corresponding layer, {0,4,5,7,8,9,10}, i = 0,l,...,M^ _b -1 ,M _s ^ =M^ _h , M is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, the layer-to-port mapping is ^ W = x ⁽⁾ W, where is the modulation symbol of layer j, which is the data corresponding to the corresponding port pre-coded by the corresponding layer, the corresponding port is indicated by the indication signaling, o^j^vl, V is the number of layers, = 0, 1,...,Μ _1,Μ =Λ , is the number of modulation symbols to be transmitted on the current layer. Through the above formula, the mapping mode of the layer to the antenna port based on the specific reference signal transmission of the user equipment can be determined, and the basis for constructing the parameter indication signaling is provided. Preferably, as shown in FIG. 5, the transmission parameter indication apparatus according to the preferred embodiment of the present invention may further include: a mask indication module 46 connected to the joint coding module 42 and configured to indicate a positive according to the size of the allocated maximum port number. The user equipment adopts the first length of the first length. When the maximum port number is less than or equal to the first threshold, the user equipment adopts the first length. Or an orthogonal mask of a second length, wherein the first length is greater than the second length. The orthogonal mask despreading length can be implicitly indicated by the assigned maximum port number. Since the larger the assigned maximum port number, the longer the OCC length required, a threshold (first threshold) can be set. When the assigned maximum port number is greater than the threshold, a longer OCC (first length) is used. Orthogonal mask), when the assigned maximum port number is less than or equal to the threshold, a shorter OCC (orthogonal mask of the second length) is used, since the OCC has backward compatibility characteristics, therefore, in the allocation When the maximum port number is less than or equal to this threshold, it is also possible to use a longer OCC. Preferably, as shown in FIG. 5, the joint coding module 42 may further include: a bit reuse unit 424 connected to the parameter list unit 422, configured to correspond to the non-enabled transport block when only one transport block is enabled. The new data indicator bits are used for joint coding. Since the joint coding module 42 adds the pilot overhead parameter when performing joint coding, it is necessary to add new bits as a carrier. When only one transport block is enabled, the new data indication bit corresponding to the non-enabled transport block is idle, so this bit can be reused for joint coding, thereby improving bit utilization and being easier to implement. FIG. 6 is a flowchart of a transmission parameter determining method according to an embodiment of the present invention. As shown in FIG. 6, the transmission parameter determining method according to the embodiment of the present invention includes: Step S602: The user equipment receives the parameter indication signaling sent by the transmission parameter indication device by using the downlink control information; Step S604, the user equipment indicates the signaling according to the parameter And determining a transmission parameter configuration, where the parameter indication signaling is generated by the transmission parameter indication device by jointly coding the transmission parameter, where the transmission parameter includes: a number of layers to be transmitted, a scrambling code sequence identity, an antenna port, and a pilot overhead. Preferably, in step S604, jointly coding the transmission parameter to generate the parameter indication signaling may further include: determining, according to the foregoing transmission parameter, a layer to antenna port mapping manner based on the user equipment specific reference signal transmission, and according to the The mapping mode generates parameter indication signaling. Preferably, determining a mapping manner of the layer to antenna port when transmitting based on the user equipment specific reference signal according to the transmission parameter may include: determining a layer to antenna port mapping manner according to the following formula: When only one layer is transmitted, /;> = JC ^(q) (/;), where is the modulation symbol of layer 0, which is the data of the corresponding port after precoding the corresponding layer, {0, 4, 5, 7, 8,9,10} , i = 0,l,...,M^ _b -1 ,M _s ^ =M^ _h , M is the number of modulation symbols to be transmitted on the current layer; when the number of layers is greater than 1, The layer-to-port mapping is ^ W = x ^(;) W, where is the modulation symbol of layer j, which is the data of the corresponding port _Pj corresponding to the layer pre-coded, _P] . The corresponding port is indicated by indication signaling, o ^j^vl, V is the number of layers, = 0,1,...,Μ _1,Μ =Λ , which is the number of modulation symbols to be transmitted on the current layer. Preferably, after step S604, the method further includes the following steps: determining an orthogonal mask despreading length according to the size of the allocated port number, and adopting a first length orthogonal mask when the allocated maximum port number is greater than the first threshold. And when the allocated maximum port number is less than or equal to the first threshold, adopting an orthogonal mask of the first length or the second length, wherein the first length is greater than the second length. Preferably, in step S604, jointly coding the transmission parameter to generate the parameter indication signaling may further include the following processing: when only one transport block is enabled, the new data indication bit corresponding to the non-enabled transport block is used for Co-coding. FIG. 7 is a structural block diagram of a transmission parameter determining apparatus according to an embodiment of the present invention. As shown in FIG. 7, the transmission parameter determining apparatus according to the embodiment of the present invention includes: a signaling receiving module 72, configured to receive parameter indication signaling sent by the transmission parameter indication means by using downlink control information; and a parameter determining module 74, connected to the letter The receiving module 72 is configured to determine a transmission parameter configuration according to the parameter indication signaling, where the parameter indication signaling is generated by the transmission parameter indication device by jointly coding the transmission parameter, where the transmission parameter includes: , scrambling sequence identity, antenna port, pilot overhead. Corresponding to the parameter indication device, the user parameter device also needs to set a corresponding parameter determination module to receive the parameter indication signaling sent by the parameter indication device, and finally determine the transmission parameter configuration according to the indication therein. Preferably, the foregoing transmission parameter indication device may determine a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted according to the foregoing transmission parameter, and generate parameter indication signaling according to the mapping manner. Preferably, the foregoing transmission parameter indication means determines that the layer to antenna port mapping manner when the user equipment specific reference signal is transmitted may include: Determine the mapping mode of the layer to the antenna port according to the following formula: When there is only one layer transmission, /;> = JC ^(q) (/;), where is the modulation symbol of layer 0, which is the corresponding port after precoding the corresponding layer. The data, {0,4,5,7,8,9,10}, i = 0,l,...,M^ _b -1 ,M _s ^ =M^ _h , M is the current layer to be transmitted The number of modulation symbols; when the number of layers is greater than 1, the layer-to-port mapping is ^ W = x ⁽⁾ W, where is the modulation symbol of layer j, which is the corresponding port of the corresponding layer pre-coded data, corresponding The port is indicated by the indication signaling, o^j^vl, V is the number of layers, = 0,1,...,Μ _1,Μ =Λ , which is the number of modulation symbols to be transmitted on the current layer. Preferably, as shown in FIG. 8, the transmission parameter determining apparatus according to the preferred embodiment of the present invention may further include: a mask determining module 76 connected to the parameter determining module 74, configured to determine the positive according to the size of the allocated maximum port number. And the first length or the second length is used when the maximum port number to be allocated is less than or equal to the first threshold. An orthogonal mask, wherein the first length is greater than the second length. Preferably, when only one transport block is enabled, the above-mentioned transmission parameter indicating means may use the new data indication bit corresponding to the non-enabled transport block for joint coding. From the above description, it can be seen that the technical solution provided by the present invention can further enhance the MU-MIMO transmission mode, and perform more flexible layer allocation in multi-user transmission, and simultaneously support between different nodes, especially in Orthogonal transmission of DMRS between different nodes in a heterogeneous network, and also facilitates interference suppression between different nodes. The whole solution can achieve the following technical effects: The existing MU-MIMO technology is enhanced to support more demodulation pilot orthogonal transmission between multiple users in the same cell; Support for demodulation pilot between different nodes Orthogonal transmission can achieve more accurate interference estimation. Supports more flexible pilot orthogonal transmission between different nodes under heterogeneous networks, and obtains larger cell splitting gain. 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, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the 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

Claim

1. A method for indicating a transmission parameter, comprising:

Coding the transmission parameters to generate parameter indication signaling, where the transmission parameters include: a number of layers to be transmitted, a scrambling code sequence identity, an antenna port, and a pilot overhead;

And sending the parameter indication signaling to the user equipment by using downlink control information.

2. The method according to claim 1, wherein the jointly encoding the transmission parameter to generate the parameter indication signal comprises:

And determining, according to the transmission parameter, a layer-to-antenna port mapping manner when the user equipment-specific reference signal is transmitted, and generating the parameter indication signaling according to the mapping manner.

The method according to claim 2, wherein determining a layer to antenna port mapping manner based on the user equipment specific reference signal transmission according to the transmission parameter comprises:

Determine the layer-to-antenna port mapping method according to the following formula: When there is only one layer transmission, /;> = JC ^(q) (/;), where ^(Q) W is the modulation symbol of layer 0, precoding the corresponding layer The data of the corresponding port, {0,4,5,7,8,9,10}, i = 0,l,...,M _b _1 ,M _b =M^ _h , is the current layer to be transmitted The number of modulation symbols; when the number of layers is greater than 1, the layer-to-port mapping is ^ W = x ^(;) W, where is the modulation symbol of layer j, which is the corresponding port of the corresponding layer pre-coded, corresponding to The port is indicated by the indication signaling, 1, V is the number of layers, = 0, 1, ..., Μ _1 , Μ = Λ , M ^ _b is the number of modulation symbols to be transmitted on the current layer.

The method according to claim 3, after the joint coding of the transmission parameters to generate the parameter indication signaling, the method further includes:

The orthogonal mask despreading length is indicated according to the size of the allocated port number. When the allocated maximum port number is greater than the first threshold, the user equipment adopts a first length orthogonal mask, when the allocated maximum port number is less than or equal to the first At the threshold, the user equipment adopts an orthogonal mask of a first length or a second length, wherein the first length is greater than the second length.

The method according to any one of claims 1 to 4, wherein jointly coding the transmission parameters to generate parameter indication signaling comprises:

When only one transport block is enabled, the new data indicator bit corresponding to the non-enabled transport block is used for joint coding.

6. A transmission parameter indicating device, comprising:

The joint coding module is configured to perform joint coding on the transmission parameters to generate parameter indication signaling, where the transmission parameters include: a number of layers to be transmitted, a scrambling code sequence identity, an antenna port, and a pilot overhead;

The signaling sending module is configured to send the parameter indication signaling to the user equipment by using downlink control information.

The device according to claim 6, wherein the joint coding module comprises:

The signaling design unit is configured to determine a mapping manner of the layer-to-antenna port when the user equipment-specific reference signal is transmitted according to the transmission parameter, and generate the parameter indication signaling according to the mapping manner.

8. The apparatus according to claim 7, wherein the signaling design unit determines a method of mapping a layer to an antenna port based on a specific reference signal transmission of a user equipment, including:

Determine the layer-to-antenna port mapping method according to the following formula: When there is only one layer transmission, /;> = JC ^(q) (/;), where ^(Q) W is the modulation symbol of layer 0, precoding the corresponding layer The data of the corresponding port, {0,4,5,7,8,9,10}, i = 0,l,...,M^ _b -1 ,M _s ^ =M^ _h , M is the current The number of modulation symbols to be transmitted on the layer; when the number of layers is greater than 1, the layer-to-port mapping is ^ W = x ^(;) W, where is the modulation symbol of layer j, which is the corresponding port after precoding the corresponding layer. The data, the corresponding port is indicated by the indication signaling, 1, V is the number of layers, = 0, 1, ..., Μ _1 , Μ = Λ , M ^ _b is the number of modulation symbols to be transmitted on the current layer.

9. The apparatus according to claim 8, further comprising: a mask indication module, configured to indicate an orthogonal mask despreading length according to a size of the allocated port number, when the allocated maximum port number is greater than the first threshold The user equipment adopts an orthogonal mask of a first length. When the allocated maximum port number is less than or equal to the first threshold, the user equipment adopts an orthogonal mask of a first length or a second length, where the first length is greater than The second length.

The device according to any one of claims 6 to 9, wherein the joint coding module further comprises: a bit reuse unit, configured to: when only one transport block is enabled, the non-enabled transport block The corresponding new data indicator bit is used for joint coding.

11. A method for determining transmission parameters, comprising:

The user equipment receives the parameter indication signaling sent by the transmission parameter indication device by using the downlink control information; the user equipment determines the transmission parameter configuration according to the parameter indication signaling, where the parameter indication signaling is used by the transmission parameter indication device The transmission parameters are jointly encoded and generated, where the transmission parameters include: a number of layers to be transmitted, a scrambling code sequence identity, an antenna port, and a pilot overhead.

12. The method of claim 11 wherein jointly encoding the transmission parameters to generate the parameter indication signaling comprises:

13. The method according to claim 12, wherein the method for determining a layer to antenna port mapping manner based on the user equipment specific reference signal transmission according to the transmission parameter comprises:

The method according to claim 13, wherein, after the user equipment determines the transmission parameter configuration according to the parameter indication signaling, the method further includes:

The orthogonal mask despreading length is determined according to the size of the allocated port number. When the allocated maximum port number is greater than the first threshold, the first length orthogonal mask is adopted, and when the allocated maximum port number is less than or equal to the first At the threshold, an orthogonal mask of the first length or the second length is employed, wherein the first length is greater than the second length.

The method according to any one of claims 11 to 14, wherein jointly coding the transmission parameters to generate the parameter indication signaling comprises:

A transmission parameter determining device, located on the user equipment, comprising:

The signaling receiving module is configured to receive the parameter indication signaling sent by the transmission parameter indication device by using the downlink control information;

a parameter determining module, configured to determine a transmission parameter configuration according to the parameter indication signaling, where the parameter indication signaling is generated by the transmission parameter indication device by jointly coding the transmission parameter, where the transmission parameter includes : Number of layers transmitted, scrambling sequence identity, antenna port, pilot overhead.

17. The apparatus according to claim 16, wherein the transmission parameter indicating means determines a mapping manner of a layer to an antenna port when transmitting based on a user equipment specific reference signal according to the transmission parameter, and generates according to the mapping manner. The parameter indicates signaling.

18. The apparatus of claim 17, wherein the method by which the transmission parameter indicating means determines a layer to antenna port mapping based on user equipment specific reference signal transmission comprises:

The device according to claim 18, wherein the transmission parameter determining device further comprises: The mask determining module is configured to determine an orthogonal mask despreading length according to the size of the allocated port number, and when the allocated maximum port number is greater than the first threshold, adopt a first length orthogonal mask, when the allocated maximum port When the number is less than or equal to the first threshold, an orthogonal mask of the first length or the second length is used, wherein the first length is greater than the second length. The apparatus according to any one of claims 16 to 18, wherein, when only one transport block is enabled, the transmission parameter indicating means uses a new data indication bit corresponding to the non-enabled transport block for joint coding .