RU2603840C2 - Method and apparatus for transmitting/receiving data stream in wireless system - Google Patents

Abstract

FIELD: data processing.

SUBSTANCE: invention relates to a digital television broadcasting system. Data streams are received, said data streams are mapped to a physical slot, at least one frame that includes physical slot is formed, at least one frame is transmitted through at least one radio frequency, at least one frame is received through at least one radio frequency. Location of physical slot included in each frame is obtained, data streams allocated to physical slot in location are received. Physical slot includes bit information indicating a number of antennae transmitting at least one frame.

EFFECT: invention discloses a method and apparatus for transmitting and receiving data streams.

36 cl, 9 dwg

Description

FIELD OF TECHNOLOGY

The invention relates generally to a wireless system and, more specifically, to a method and apparatus for receiving / transmitting data streams in a wireless system.

BACKGROUND

A wireless system, such as a digital television broadcasting system, can transmit data as a sequence of frames grouped into a frame structure. A digital television broadcasting system generally employs the Advanced Television System Committee (ATSC) digital television broadcasting (DVB) standard, service integration digital broadcasting (ISDB), or digital multimedia broadcasting (DMB). Each frame typically includes a preamble section and a data section. The preamble section and the data section are time multiplexed. The data section can be formed as a series of data streams that can be considered as physical layer channels (PLP). PLPs can carry services, for example, provide a video channel to a user. Data or data streams from frames are received using signaling information. An alarm can be considered a physical layer alarm or a layer 1 (L1) signaling. The signaling may indicate a modulation or coding scheme that should be used to receive data. The signaling may indicate, for example, sections of the data field to be decoded, or information necessary for receiving data, such as the location of the data stream within the data section.

Regarding the DVB standard, frame structures in the DVB standard can provide physical slots within the DVB physical frame structure. For example, DVB Terrestrial 2nd generation (DVB-T2), a terrestrial television broadcasting standard, has a super-frame structure consisting of a series of frames. A slot included in a superframe or in each frame does not transmit a DVB-T2 signal. A superframe is regarded as a perspective extension frame (FEF). For example, FEF slots can be provided in addition to parts of the frame structure that serve to transmit a signal intended for reception by conventional stationary DVB receivers.

It has been proposed to use additional physical slots, such as FEF slots, for transmitting signals, such as, for example, signals intended for reception by portable receivers. For example, UK patent application GB 1100901.6 relates to a system in which data streams can be mapped to logical frames, and logical frames can be mapped to a series of additional physical slots to form a logical channel for transmitting data streams. The sequence of additional physical slots may include slots within the transmission sequence of more than one radio frequency channel.

It may be desirable to transmit data streams encoded in a multi-transmitter coding scheme, such as, for example, a multi-input multi-output coding scheme (MIMO) or a multi-input multi-output coding scheme (MISO). However, not all RF channels in a wireless system can be adapted for transmission from many antennas. In addition, the number of antennas grouped for transmission may vary among the radio frequency channels. If a data stream encoded in a multi-transmitter coding scheme is mapped to a logical channel formed from additional physical slots within the transmission sequence of more than one RF channel, the multi-transmitter coding scheme used by the data stream may not correspond to the number of transmitting antennas and / or a multi-transmitter coding scheme used in at least some radio frequency channels. As a result, there may be a restriction on the formation of a logical channel, such, for example, in which a logical channel can be formed only from those radio frequency channels that use the same coding scheme with many transmitters as the data stream.

SUMMARY OF THE INVENTION

TECHNICAL PROBLEM

The present invention is directed to at least addressing the aforementioned problems and / or disadvantages and providing at least those advantages that are described below. Accordingly, an aspect of the invention provides an apparatus and method for transmitting / receiving data streams in a wireless system.

SOLUTION

According to one aspect of the present invention, there is provided a method for transmitting data streams in a wireless system. Data streams are accepted. These data streams are mapped to a physical slot. At least one frame is formed, which includes a physical slot. At least one frame is transmitted on at least one radio frequency. The physical slot includes bit information indicating the number of antennas transmitting at least one frame.

According to another aspect of the present invention, an apparatus for transmitting data streams in a wireless system is provided. The apparatus includes a receiver for receiving data streams. The apparatus also includes a controller for mapping data streams to the physical slot and forming at least one frame that includes the physical slot. The apparatus further includes a transmitter for transmitting at least one frame on at least one radio frequency. The physical slot includes bit information indicating the number of antennas transmitting at least one frame.

According to another aspect of the present invention, there is provided a method for receiving data streams in a wireless system. At least one frame is received on at least one radio frequency. The location of the physical slot included in each frame is detected. Data streams are received that are distributed to a physical slot by its location. The physical slot includes bit information indicating the number of antennas transmitting at least one frame.

According to another aspect of the present invention, there is provided an apparatus for receiving data streams in a wireless system. The apparatus includes a receiver for receiving at least one frame on at least one radio frequency. The apparatus also includes a controller for detecting the location of the physical slot included in each frame and receiving data streams allocated to the physical slot at its location. The physical slot includes information indicating the number of antennas transmitting at least one frame.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description in combination with the accompanying drawings, in which:

FIG. 1 is a diagram illustrating a mapping of logical frames to physical slots according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a mapping of logical channels to radio frequencies according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a mapping of logical channels to radio frequencies according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a mapping of antenna groups into a logical frame according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a frame building process according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating frequency interleaving according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating a signaling circuit according to an embodiment of the present invention;

FIG. 8 is a diagram illustrating a signaling circuit according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating signaling steps according to an embodiment of the present invention.

MODES FOR CARRYING OUT THE INVENTION

Embodiments of the present invention are described in detail with reference to the accompanying drawings. The same or similar components may be denoted by the same or similar reference numerals, even if they are shown in different drawings. Detailed descriptions of the structures or processes known in the art may be omitted in order to avoid impairing the understanding of the subject matter.

As an example, embodiments of the invention are described in the context of a Digital Video Broadcasting Next Generation Handheld (DVB-NGH - the next generation DVB standard for broadcasting content to portable and mobile devices), in which additional data for receiving DVB-NGH receivers is transmitted inside the FEF slots in 2nd generation DVB-T2 terrestrial broadcasting system.

However, it should be understood that this is provided by way of example only and that other embodiments may include other wireless broadcasting systems or unicast / multicast systems. Embodiments of the present invention are not limited to transmitting digital video signals.

In FIG. 1 is a diagram illustrating a mapping of logical frames to physical slots according to an embodiment of the present invention.

Shown in FIG. 1 DVB frame structures, for example, in a DVB-T2 system, can provide FEF slots 2a, 2b, 2c within a radio frequency channel transmission sequence. FEF slots 2a, 2b, 2c are considered as FEF parts or FEF elements. FEF slots 2a, 2b, 2c occupy physical slots within the DVB physical frame structure, which may be reserved for future use and may not be used to transmit the DVB-T2 signal. FEF slots 2a, 2b, 2c can be provided in addition to parts of the frame structure, which are used to transmit signals intended for reception by conventional DVB-T2 receivers, and are indicated in FIG. 1 as a T2 frame.

It has been proposed to use FEF slots that do not transmit conventional DVB-T2 data for transmitting signals intended for reception by portable receivers, for example DVB-NGH receivers. As shown in FIG. 1, data streams such as PLP can be mapped to logical frames 4a, 4b and logical frames 4a, 4b can be mapped to a sequence of additional physical slots, such as FEF slots 2a, 2b, 2c, in order to form a logical channel for transmitting data streams . The FEF sequence of slots 2a, 2b, 2c may include slots within the transmission sequence of more than one radio frequency channel. As shown in FIG. 1, an NGH logical frame 4a is transmitted in at least two parts, in which case in three FEF slots 2a, 2b, 2c, so that the length of the logical NGH frame can be longer than the length of a single one of the FEF slots 2a, 2b , 2c. Logical NGH frame 4a can be arranged to have a smaller amount of signaling information relative to the amount of data than if the length of the logical frame was limited by the length of the additional physical slot, in this case, the FEF slot 2a, 2b, 2c. Two or more FEF slots may be located within the transmission sequence of different RF channels, and the logical frames may be constructed to have a constant length, even though, for example, the length of the additional physical slots in the sequence of additional physical slots may vary among the RF channels.

As shown in FIG. 1, a given logical frame 4a typically includes signaling information and data. Signaling information typically includes sections “P1” 6a, 6b and “L1-pre” 8a, 8b, “L1-config” 10, “L1-dynamic” 12. Sections 14, 16, 18 of the frame data are included in yourself plp. PLPs can, for example, overlap in time and can be frequency multiplexed. L1-config section 10 determines the duration for L1-config signaling information. L1-config signaling information usually contains information that is applicable for each frame of a superframe consisting of a number of frames, and is usually the same for each frame in a superframe. L1-dynamic information typically varies from one logical frame to another logical frame and includes information for decoding PLP within a logical frame. Typically, L1-dynamic information may include, for example, the starting address of the PLP.

It may be desirable to transmit a stream of data encoded in a multi-transmitter coding scheme, such as, for example, a MIMO coding scheme or MISO coding scheme. However, not all RF channels in a wireless communication system can be adapted for transmission from many antennas. In addition, the number of antennas grouped for transmission may vary among the radio frequency channels.

In FIG. 2 is a diagram illustrating the mapping of logical channels to radio frequencies according to an embodiment of the invention.

As shown in FIG. 2, the first radio frequency channel RF1 20 is provided with two antennas (Nt = 2). Channels RF2 22 and RF3 24 are equipped with one antenna. In this embodiment of the present invention, the logical channel LNC1 26 is adapted to carry a data stream using multi-transmitter coding schemes (MIxO), for example, MIMO or MISO coding schemes. The logical channels LNC2 28 and LNC3 30 are adapted to carry data streams using coding schemes (SIxO) with a single transmitter, for example coding schemes with one input / multiple outputs (SIMO) or SISO.

In an embodiment of the present invention, a first row of data streams, such as, for example, PLP, is mapped to a first row of logical frames, which, in turn, are mapped to a first sequence of additional physical slots, such as FEF slots, within certain RF channels for the formation of the first logical channel for transmitting the first row of data streams. A logical channel may be referred to as a Logical HGH Channel-LNC. The first set of data streams may have a multi-transmitter coding scheme, such as, for example, a MIMO or MISO coding scheme, but not all data streams from the first row should have the same multi-transmitter coding scheme. At least one of the first set of said plurality of data streams may have a multi-transmitter coding scheme for a different number of transmit antennas than other streams from the first row. The first series of logical frames is transmitted in the first sequence of additional physical slots using the same pilot pattern for each of the slots in the first sequence of slots and for each of the data streams. Sharing the same pilot pattern with data streams having different coding schemes with many transmitters allows data streams to be mapped onto the same logical channel. The first pilot pattern may be selected suitable for a multi-transmitter coding scheme used by one of the first series of data streams requiring the highest number of pilot signals so that each of the data streams can operate efficiently, for example, performing channel estimation according to its corresponding multi-transmitter coding scheme.

In an embodiment of the present invention, a second set of data streams is mapped to a second series of logical frames, which are then mapped to a second sequence of additional physical slots, also within some radio frequency channels, with the aim of forming a second logical channel for transmitting a second row of data streams. The second row of logical frames is transmitted in the second sequence of additional physical slots using a different, second, pilot pattern, different from the pilot pattern used to transmit the first row of logical frames, but using the same second pilot pattern for each of the slots in the second sequence of slots and for each of the data streams of the second set.

At least one additional physical slot from the first sequence may be a temporary slot within the transmission sequence of the same radio frequency channel, as well as at least one additional physical slot from the second sequence. An additional physical slot from the same radio frequency channel may be adapted to use different pilot patterns. This allows two logical channels to use additional physical slots within the transmission sequence of the same radio frequency channel, even if the data streams carried by one logical channel have a coding scheme using a different pilot pattern different from that used by data streams carried by another logical channel. This can create the possibility of providing logical channels without restriction, according to which a logical channel can be formed only from those radio frequency channels that use the same coding scheme, for example, a coding scheme with many transmitters, as the data stream. Logical channels can be formed using radio frequency channels, which can be adapted, in terms of the number of transmitters, for multi-transmitter coding, different from that used for data streams to be transmitted using the logical channel. Typically, the pilot pattern used in the RF channel may correspond to the number of transmitters available and the multi-transmitter coding scheme used in that RF channel.

The first sequence of additional physical slots is selected so as to be adapted for transmission by a group of antennas, the number of which is at least equal to the maximum number of transmitting antennas required by the multi-transmitter coding scheme used by any of the first row of data streams so that each of the data streams can work according to its respective coding scheme with many transmitters in each of the additional physical slots used for the logical channel for the purpose of transmitting the stream in the data.

In an embodiment of the present invention, the mapping of the first row of data streams to the first row of logical frames is performed such that an integer number of blocks of the space-time code in the multi-transmitter coding scheme is mapped to each OFDM symbol, so that the blocks of the space-time code are not split and the elements each code block is stored in the same OFDM symbol. This preserves the efficiency of space-time coding, for example, in terms of noise immunity as a function of signal-to-noise ratio. In addition, the mapping of the first set of data streams to the first row of logical frames can be performed so that each OFDM symbol into which the first set of the set of data streams is mapped has a number of data subcarriers that is an integer multiple of the minimum total multiple of the space-time block lengths code used by the first row of the plurality of data streams. This ensures that the integer number of blocks of the space-time code in the multi-transmitter coding scheme can be mapped to each OFDM symbol, so that no blocks of the space-time code should be split between OFDM symbols, since such an action may reduce the encoding efficiency. The mapping of the first set of data streams into the first row of logical frames can be arranged so that frequency interleaving results in the mapping of this block of the space-time code in the coding scheme with many transmitters into adjacent data subcarriers, so that the efficiency of space-time coding, for example, in terms of noise immunity as a function of signal-to-noise ratio can be maintained. Adjacent data subcarriers are adjacent prior to piloting; a pilot signal may, in principle, be inserted between two adjacent data subcarriers.

In an embodiment of the present invention, the second pilot pattern is selected according to the coding scheme used by at least one of the second row of data streams requiring the largest number of pilot signals, so that each of the first and second logical channels is adapted to use a corresponding pilot pattern suitable for portable data streams. Each of the second set of multiple data streams may be adapted for SISO transmission. The pilot pattern used for the second logical channel may be suitable for SISO transmission, which typically contains fewer pilots and therefore allows the allocation of more subcarriers for data transmission, increasing the efficiency of the data transmission scheme.

Coding schemes with many inputs, one or many outputs (MIXO) and one input, one or many outputs (SIXO) can be multiplexed to provide logical channels, which can be called LNC. A possible approach is to define MIXO or SIXO at the slot level. This is motivated by the presence of L1-pre in each slot, and it is L1-pre that signals the pilot pattern used in the additional physical slot. As a result, a logical frame, which may be a logical NGH frame (LNF) consisting of multiple slots, may have different MIXO or SIXO parts. As a result, this approach should result in a single LNF having different pilot patterns, and since it is allowed for one PLP to overlap two slots, different pilot patterns may affect the same PLP, and this may reduce transmission efficiency. As an alternative to this possible approach, in the embodiment of the present invention, MIXO and SISO multiplexing can be performed at the LNC level, so that a pilot pattern can be defined at the LNC level. This can provide efficient multiplexing without affecting the ability of some PLPs to be allowed to be SIXO, as they can be distributed in the SIXO LNC.

A description of the multiplexing of MISO and MIMO PLP in a given logical channel is given below. In embodiments of the present invention, the same pilot pattern is applicable to MISO and MIMO, and this pilot pattern is determined by the largest number of transmit antennas in the coding schemes used by the PLP. In order to provide flexibility in choosing the best MIXO scheme suitable for each PLP, P2 symbols can have different MIMO schemes, since different PLPs (signaling or data) can be carried (in whole or in part) in a P2 symbol. It is necessary to use a device of at least pairwise cell interleaving so that the cells do not collapse. The use of a pairwise cell interleaving device extends to the more general case where pairing extends to more than 2 cells. In the formation of logical channels, the formation of the frame structure has an additional stage in the construction of slots, and when displaying cells in slots and interleaving cells, this stage is taken into account.

In an embodiment of the present invention, a logical channel (LNC) allows the receiver to receive all services / PLP multiplexed in the LNC using a single tuner. When a service is transmitted over many PLPs (for example, using SVC), all PLPs related to this service can be transmitted over the same LNC, since receiving many combined PLPs in different LNCs may require more than one tuner. In addition, in an embodiment of the invention, if the LNC contains a PLP using MIXO, a pilot pattern used throughout the LNC is selected to support MIXO. When the pilot scheme used in the LNC is MIXO, multiplexing of SIXO and MIXO in the same LNC can be eliminated since the pilot scheme and pilot pattern used for MIXO may be ineffective when applied to SIXO. In an embodiment of the present invention, all NGH slots, in other words, additional physical slots displayed in the MIXO LNC, have the same number of transmit antennas (Nt). The pilot pattern used in the LNC is usually defined in the L1-pre part of the preamble at the beginning of each NGH slot.

In FIG. Figure 2 shows the first example of the distribution of slots of the additional physical layer in three radio frequency channels into three logical channels (LNC) 26, 28, 30. There are 3 radio frequency channels RF1 20, RF2 22 and RF3 24, one of which has two transmit antennas (Nt = 2), and the other two have one transmit antenna (Nt = 1). When a SIXO LNC uses a slot in an RF channel with two transmit antennas, a SIXO transmission encoding method for transmission from many antennas, such as eSFN encoding, can be used, while encoding intended for use with a single transmit antenna can be used for transmission from two antennas, for example, in the case when two antennas are to be used (these slots are shaded in Fig. 2). eSFN is a coding method for SIXO when it is undesirable to suppress transmission from one of the antennas, for example, to eliminate power fluctuations between transmitting antennas. The eSFN is transparent to the receiver, and therefore, it is usually not necessary to signal its use.

In FIG. 3 illustrates an embodiment of the present invention in which there are three radio frequency (RF) channels 32, 34, 36, two of which have two transmit antennas (Nt = 2), and one of them has one transmit antenna (Nt = 1). Two logical channels are shown, LNC1 38 carries MIXO data streams, and LNC2 40 carries SIXO data streams. Shaded slots, for example slots indicated by 42, are used to transmit SIXO using two antennas so that they can be encoded using the eSFN method.

In FIG. 4 shows an example of MIMO. The logical channel (LNC) and logical frame (LNF) are used in a similar way with respect to application for SIXO. The start of the LNF and the length of the L1-Post are signaled in the L1-Pre parts of the logical frame. The number of data cells in the LNF is usually fixed and notified in the L1-post. You can see that the logical frame is mapped to antenna group 1 (Antenna Group 1) 44 and to antenna group 2 (Antenna Group 2) 46 for transmission.

In FIG. 5 is a flowchart of a process including a slot building step 50, a serial-parallel conversion and cell mapping step 52, a T-shaped (TW) frequency interleaving (FI) step 54, a pilot nesting step 56, and a fast conversion step 58 Fourier (FFT) and the introduction of a guard interval (GI) and P1 symbol in an embodiment of the present invention. For each antenna, a stream of NUM_CELLS_NGH_FRAME cells is generated for each LNF.

When coding according to the Alamouti SF scheme, the code words c (l) at the input of the slot former are determined by equation (1) below.

With expanded spatial multiplexing (SM) SF, the code words take the form defined by equation (2).

For the 3xN spatial frequency coding step, the hybrid circuit may use SF codewords defined by equation (3), equation (4) and equation (5) below.

3xN Rate 1 Alamouti + QAM:

3xN Rate 3/2 L3-code:

3xN Rate 2 UTU Hybrid:

In the general case, any MIMO codeword using the spatial frequency coding step will provide a codeword whose size is determined by equation (6) below.

Q is the number of cells enclosed in the same codeword SF. Any codeword will be Nt × T in size, where Nt is the number of transmitting antennas, and T is the number of cells within which the channel should be constant (or as much as possible). The spatial coefficient is defined as T / Q.

As for the step of serial-parallel conversion and cell mapping (SP + cell mapping) shown in FIG. 5 in an embodiment of the present invention, if there are many PLPs, each of which uses its own SIxO / MIxO coding scheme, the pilot pattern is determined by the PLP using the maximum number of transmit antennas (Ntmax).

After SF encoding, PLP cells created after XIXO encoding are separated according to their antenna group. This process can be controlled by the process of serial-parallel conversion (S / P), when each Nt successive elements / cells are split into different paths.

In order to make the S / P process independent of SF encoding, SF code words can be expanded to NtmaxxT by introducing zeros during the encoding process.

As shown in FIG. 6, after the cells in each SF codeword are split according to the antenna group in step 60 (S / P), the cells from each antenna group can be grouped into M blocks of Tmax cells, where Tmax = mcm (Ti)), i = 0 ... NUM_PLP-1. M blocks can be mapped to the corresponding cells in each slot, while one slot is formed by one P2 symbol CP2xNP2 cells, Ndata data of OFDM symbols CdataxNdata cells and (optionally) a symbol for closing the slot CFCx1 cells. The mapping of M blocks can be performed first in the frequency direction (in the form of columns), and then in the time direction. In an embodiment of the present invention, the number of blocks mapped to each OFDM symbol (in the form of columns) is an integer:

CP2, Cdata, CFC / Tmax Z,

where Z is an integer.

After the cells are mapped into slots, a T-shaped frequency interleaving can be used, in which interleaving is performed on Tmaxcells cell blocks. Note that for T = 2 this is Pairwise Interleaver 62, as shown in FIG. 6. However, T can be an integer greater than or equal to 2. Each Tmaxcells block is mapped to neighboring subcarriers, usually an adjacent data subcarrier block, before the Pilot Insertion is introduced in steps 64a, 64b. In FIG. Figure 6 shows the case of Tmax = 2. The words of the space-time code are stored in adjacent blocks. In FIG. 6, the components of a given codeword are denoted by the same letter. Following the introduction of the pilot signal 64a, 64b, an FFT is typically performed and a GI is inserted in steps 66a, 66b.

In order to extract information regarding L1 Signaling and Data PLP from the received signals, the receiver must know the number of antennas used for transmission, as well as the Tmax value used during the T-shaped frequency interleaving. These two parameters are usually interrelated, and not all of their combinations are possible, so the signaling format can be used, as shown in FIG. 7. The upper table in FIG. 7 refers to the case when the transmission is carried out by no more than two antennas, and it can be seen that in this case two bits are required for signaling information. The bottom table refers to the case when the transmission is carried out by no more than three antennas, and it can be seen that three bits are required. This case may include hybrid terrestrial / satellite (TER / SAT) transmission.

Based on the assumption that nS3 bits are needed, these bits can be signaled during the start of the P1 symbol (shown in FIG. 1), as shown in FIG. 8. In an alternative embodiment of the present invention, all bits available for NGH signaling can be combined into a single 4 + nS3 bit word, which can be used to signal all possible combinations of FFT size, guard interval (GI), waveform, the number of transmitting antennas and the T-shaped parameter.

In an embodiment of the present invention, the signaling is directed to indicate to the receiver the type of spatial frequency coding that is used for the various associated PLPs, as shown in FIG. 9. P1 signaling 90 is usually transmitted at the beginning of the FEF slot. For the L1-Pre stage 92 MIMO, the coding scheme is fixed and depends on the maximum number of transmitters, Ntmax. For example, if Ntmax = 1, then in this case it can be concluded that SIXO encoding is used, if Ntmax = 2, then the Alamouti encoding scheme is used, and if Ntmax = 3, then the 3xN Rate 1 Alamouti + QAM encoding scheme is used. In an embodiment of the present invention, MIMO coding for L1-Post is signaled in L1-Pre as three bits, which may be denoted by L1_POST_MIMO. MIMO coding of each PLP can be signaled in the PLP loop of the configurable part of L1-Post 94, which is indicated as PLP_MIMO (3 bits) 96.

Embodiments of the present invention have been described in which the mapping of additional physical layer slots to a logical channel depends on the configuration of the logical channel regarding a coding scheme with one input or with multiple inputs. In embodiments of the present invention, the logical channel may use additional physical layer slots having a number of antennas equal to at least the maximum number of transmit antennas used in MIMO coding. A single pilot pattern can be used for the entire logical channel tuned to the maximum number of transmit antennas. A method for multiplexing PLPs for different MIMO coding schemes has been described, in which each PLP can use a different MIMO coding, including L1 signaling here. The mapping of MIMO codewords to slots has been described, which allows T-shaped frequency interleaving. A T-shaped frequency interleaving scheme may be based on T2 frequency interleaving sequences. An L1 signaling scheme has been described that allows a receiver to detect the MIMO configuration of each logical channel (LNC) and retrieve MIXO / SIXO data streams (PLP).

Although the invention has been presented and described with reference to certain options for its implementation, specialists in the art should understand that various changes in form and details can be made in it without deviating from the essence and scope of the invention, which are defined by the attached claims.

Claims (36)

1. A method for transmitting data streams in a wireless system, the method comprising the steps of:
Receive data streams
map data streams to a physical slot;
form at least one frame that contains a physical slot; and
transmit at least one frame at least one radio frequency,
moreover, the physical slot contains bit information indicating the number of antennas transmitting at least one frame. 2. The method of claim 1, wherein the step of displaying the data streams comprises the steps of displaying the data streams in at least one logical frame and displaying each of the at least one logical frame in at least two physical slots . 3. An apparatus for transmitting data streams in a wireless system, the apparatus comprising:
a receiver for receiving data streams;
a controller for displaying data streams in the physical slot and forming at least one frame that contains the physical slot; and
a transmitter for transmitting at least one frame at least one radio frequency,
moreover, the physical slot contains bit information indicating the number of antennas transmitting at least one frame. 4. The apparatus of claim 3, wherein the controller maps data streams to at least one logical frame and maps each of at least one logical frame to at least two physical slots. 5. A method for receiving data streams in a wireless system, this method comprising the steps of:
take at least one frame at least one radio frequency;
get the location of the physical slot included in each frame; and
receive data streams distributed in a physical slot by location,
moreover, the physical slot contains bit information indicating the number of antennas transmitting at least one frame. 6. The method of claim 5, wherein the step of receiving data streams comprises the steps of generating one logical frame from at least two logical frames using data distributed in at least two physical slots and retrieving data streams from at least two logical frames. 7. An apparatus for receiving data streams in a wireless system, the apparatus comprising:
a receiver for receiving at least one frame on at least one radio frequency;
a controller for detecting the location of the physical slot included in each frame and receiving data streams distributed in the physical slot by location,
moreover, the physical slot contains bit information indicating the number of antennas transmitting at least one frame. 8. The apparatus of claim 7, wherein the controller generates one logical frame from at least two logical frames, using data distributed in at least two physical slots, and extracts data streams from at least two logical frames. 9. The method of claim 2, wherein each of the at least two physical slots comprises signaling information used to receive data streams mapped to at least two physical slots. 10. The method of claim 9, wherein the signaling information comprises P1 information, L1-pre information and L1-post information, and
wherein L1-post information contains L1-config information and L1-dynamic information. 11. The method of claim 10, wherein the bit information is included in the L1-config information. 12. The method of claim 10, wherein the P1 information and L1-pre information are distributed in each of at least two physical slots. 13. The method of claim 10, wherein the L1-config information and L1-dynamic information are distributed at the beginning of at least one frame. 14. The method of claim 10, wherein when at least one logical frame forms a logical channel, at least one frame is transmitted on at least two radio frequencies and at least two logical channels exist, wherein one logical channel is set as the main logical channel, and the remaining logical channels are set as logical subchannels, L1-config information and L1-dynamic information are distributed at the beginning of each logical frame included in the main logical channel, and L1-dynamic information distributes I was at the beginning of each logical frame included in the logical sub-channel. 15. The method according to p. 14, in which the logical channel contains at least one superframe, and at least one superframe contains many frames, and L1-config information is distributed at the beginning of each of at least one superframe included in the logical subchannel . 16. The apparatus of claim 4, wherein each of the at least two physical slots comprises signaling information used to receive data streams mapped to at least two physical slots. 17. The apparatus of claim 16, wherein the signaling information comprises P1 information, L1-pre information and L1-post information, and
wherein L1-post information contains L1-config information and L1-dynamic information. 18. The apparatus of claim 17, wherein the bit information is included in the L1-config information. 19. The apparatus of claim 17, wherein the P1 information and L1-pre information are distributed in each of at least two physical slots. 20. The apparatus of claim 17, wherein the L1-config information and L1-dynamic information are distributed at the beginning of at least one frame. 21. The apparatus of claim 17, wherein when at least one logical frame forms a logical channel, at least one frame is transmitted on at least two radio frequencies and at least two logical channels exist, wherein one logical channel is set as the main logical channel, and the remaining logical channels are set as logical subchannels, L1-config information and L1-dynamic information are distributed at the beginning of each logical frame included in the main logical channel, and L1-dynamic information is distributed Xia the beginning of each logical block included in the logical subchannel. 22. The apparatus of claim 21, wherein the logical channel comprises at least one superframe, wherein at least one superframe contains multiple frames, and L1-config information is distributed at the beginning of each of at least one superframe included in the logical subchannel . 23. The method of claim 6, wherein each of the at least two physical slots comprises signaling information used to receive data streams mapped to the at least two physical slots. 24. The method of claim 23, wherein the signaling information comprises P1 information, L1-pre information and L1-post information, and
wherein L1-post information contains L1-config information and L1-dynamic information. 25. The method of claim 24, wherein the bit information is included in the L1-config information. 26. The method of claim 24, wherein the P1 information and L1-pre information are distributed in each of at least two physical slots. 27. The method of claim 24, wherein the L1-config information and L1-dynamic information are distributed at the beginning of at least one frame. 28. The method of claim 24, wherein when at least one logical frame forms a logical channel, at least one frame is transmitted on at least two radio frequencies and at least two logical channels exist, wherein one logical channel is set as the main logical channel, and the remaining logical channels are set as logical subchannels, L1-config information and L1-dynamic information are distributed at the beginning of each logical frame included in the main logical channel, and L1-dynamic information distributes I was at the beginning of each logical frame included in the logical sub-channel. 29. The method according to p. 28, in which the logical channel contains at least one superframe, and at least one superframe contains many frames, and L1-config information is distributed at the beginning of each of at least one superframe included in the logical subchannel . 30. The apparatus of claim 8, wherein each of the at least two physical slots comprises signaling information used to receive data streams mapped to at least two physical slots. 31. The apparatus of claim 30, wherein the signaling information comprises P1 information, L1-pre information and L1-post information, and
wherein L1-post information contains L1-config information and L1-dynamic information. 32. The apparatus of claim 31, wherein the bit information is included in the L1-config information. 33. The apparatus of claim 31, wherein the P1 information and L1-pre information are distributed in each of at least two physical slots. 34. The apparatus of claim 31, wherein the L1-config information and L1-dynamic information are distributed at the beginning of at least one frame. 35. The apparatus of claim 31, wherein when at least one logical frame forms a logical channel, at least one frame is transmitted on at least two radio frequencies and at least two logical channels exist, wherein one logical channel is set as the main logical channel, and the remaining logical channels are set as logical subchannels, L1-config information and L1-dynamic information are distributed at the beginning of each logical frame included in the main logical channel, and L1-dynamic information is distributed Xia the beginning of each logical block included in the logical subchannel. 36. The apparatus of claim 35, wherein the logical channel comprises at least one superframe, wherein at least one superframe contains multiple frames, and L1-config information is distributed at the beginning of each of the at least one superframe included in the logical subchannel .

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