KR100964665B1 - Method of allocating a transmission format of data and transmitting data thereof - Google Patents

Abstract

 The present invention relates to a communication system, and more particularly, to a method of assigning a data transmission format and a method of transmitting data according to the assignment. The method of assigning this data transmission format is characterized by assigning one or more transmission formats for the transmission rate of the data to be transmitted.

Transmission format

Description

Method of allocating a transmission format of data and transmitting data etc.

1 illustrates a configuration of a transmission chain (Radio Configuration) of the PDCH.

2 is a procedure for a method of determining a transmission format of a PDCH of a transmitter according to the present invention.

3 illustrates a reception procedure of a PDCH at a receiving end according to the present invention.

* Description of the major symbols in the drawings *

10: frame quality indicator additional block

20: Spare bit / encoder tail bit additional block

30: error correction encoder

40: symbol iterator and / or symbol remover

50: channel interleaver

60: modulator

70: Walsh Cover

The present invention relates to a communication system, and more particularly, to a method for determining a data transmission format according to a data rate and a method for transmitting data according to this allocation.

In a wired / wireless communication system, when a transmitter uses a specific data transmission channel on a physical layer to transmit data to a receiver, it may be necessary to retransmit the data once transmitted by various factors such as a wireless channel environment. For example, when the receiving end receives data but an error occurs, there is a case where the transmitting end requests the transmitting end to retransmit the entire data in the physical layer or a layer higher than the physical layer. As such, when retransmission is requested, the data that needs to be retransmitted may transmit the corresponding data through a channel distinct from a channel for transmitting new data. When the transmitting end transmits corresponding data for the first time through the specific data transmission channel, this transmission channel is called a new transmission channel, and when retransmitting the corresponding data, it is called a retransmission channel.

As such, when there are two types of channels, there are two main ways of operating a communication system.

First, it is a method of not simultaneously transmitting data through the two types of channels for a certain time interval. That is, the data is transmitted only through one of the new transmission channel and the retransmission channel during a predetermined time interval.

Second, it is a method of transmitting the corresponding data through two types of transmission channels for a certain time period. That is, during a predetermined time interval, the corresponding data is transmitted through either one of a new transmission channel and a retransmission channel, or each data is transmitted through both channels. In this case, each transport channel transmits the corresponding data using a transmission format determined according to the transmission data rate of the data included therein. That is, in order to determine a transmission format of a transmission channel for transmitting corresponding data for a predetermined time interval, regardless of the type of transmission channel or the number of transmission channels, the transmission data rate of data to be transmitted through this transmission channel may be determined. have. This is for easily identifying the transmission channels currently used by the transmitting end and the receiving end using two types of transmission channels. When the transmitting end and the receiving end determine a transmission format of a transmission channel for transmitting or receiving data, the transmission format specified for each transmission data rate is determined in consideration of the case where the corresponding data are simultaneously transmitted through two types of channels.

As in the first method, when the transmitting end transmits the corresponding data through one of the new transmission channel and the retransmission channel, sometimes the extra transmission power remains. For example, when transmitting data through a retransmission channel and / or a new transmission channel under a relatively stable channel environment, the retransmission channel may require relatively less power than the new transmission channel. In such a case, there is often a case that extra transmission power remains when transmitting retransmission data through a retransmission channel than when transmitting new data through a new transmission channel for a specific time interval. If this extra transmission power is used, even if it is possible to send a large amount of data in a short time, by not using this extra transmission power may cause the transmitting end to waste resources.

In the second method, the corresponding data is transmitted through a new transmission channel or a retransmission channel having any one transmission format. Therefore, although there may be a better transmission format for the transmission data rate of this data when transmitting data over only one transmission channel for a certain time, the transmission made considering the case where two types of channels are transmitted simultaneously The format will be used. Therefore, a problem may occur in which the efficiency of resources is degraded at the transmitting end.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a method for determining a data transmission format for increasing resource utilization of a communication system and a method for transmitting data according to the allocation. .

Another object of the present invention is to provide a method for determining a data transmission format for allowing at least two transport channels transmitted simultaneously to transmit data according to an optimal transmission format, and a method for transmitting data according to this allocation.

According to one aspect of the invention, the method for determining a data transmission format is characterized by allocating at least two transmission formats for each of all or some of the various transmission rates of data to be transmitted.

According to another feature of the invention, a method of transmitting data comprises at least one or more first transmission formats previously assigned for a transmission rate of first data and at least one previously assigned for a transmission rate of second data. Selecting transmission formats for the first data and the second data, respectively, of the one or more second transmission formats so that communication resources do not overlap, and transmitting the corresponding data according to the selected transmission formats, respectively. .

According to another aspect of the invention, a method for transmitting data comprises determining at least one type of transport channel for transmitting packet data, determining a packet data transmission rate on the determined type of transport channel, and determining the determined transmission. And transmitting the packet data over a transport channel of the determined type according to a higher priority transport format of one or more predetermined transport formats for the rate.

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

One feature of the present invention is to specify one or more transmission formats for all or part of each data transmission rate. This is to avoid duplication of some resources for transport formats of transport channels transmitted simultaneously, and to allow each transport channel to transmit its data in an optimal transport format or a quasi-transport format that approximates this optimal transport format.

Another feature of the invention is that the determination of the transmission format for each data transmission rate follows a predetermined rule between the transmitting end and the receiving end. Examples of the rules are disclosed in Table 1, Table 2, and Table 3 so that the transmitting and receiving end can share these rules.

Another feature of the present invention is that the mapping relationships of transmission formats to a predetermined data transmission rate between the transmitting end and the receiving end depend on whether to transmit data through a new transmission channel, a retransmission channel, or both channels for a certain period of time. Is determined. In addition, the present invention further considers the priority of the two channels, the redundancy of resources of the transmission channels to be transmitted simultaneously. In particular, on the reverse link, if the transmission format is determined in consideration of resource redundancy due to the limitation of communication resources such as Walsh codes, it is expected to greatly increase the efficiency of using the communication resources and to transmit data.

Another feature of the present invention is that the transmitting end transmits an auxiliary physical channel having information on whether the communication system transmits data through a new transmission channel, a retransmission channel, or both channels for a certain period of time to the receiving end. At this point, the receiving end can determine whether the transmitting end is transmitting data on the new transmission channel, the retransmission channel, or both channels based on the information of this auxiliary physical channel. Alternatively, if the receiving end has not properly received the packet data before, it knows that the transmitting end has requested the retransmission of the packet data, so that after a predetermined time, it knows whether the data will be received through the retransmission channel. Therefore, it can be known in advance that after the predetermined time, the received PDCH will necessarily include the RPDCH.

In order to explain the CDM operation scheme of the transport channel according to the present invention, the following definition is used.

Packet Data Channel (PDCH) refers to reverse data transmission channels through which a receiving end may request retransmission of data on a physical layer. NPDCH (New Packet Data Channel) indicates a new transport channel. RPDCH (Retransmission Packet Data Channel) indicates a retransmission channel. PDCCH (Packet Data Control Channel) collectively refers to the channels for transmitting auxiliary control information for the receiver to properly receive the PDCH. That is, the receiving end analyzes the control information received through the PDCCH to know the data transmission rate of the PDCH currently being received, and whether the PDCH currently being received is NPDCH or RPDCH, or whether the NPDCH and RPDCH are received together. Can be. In this case, an indicator indicating whether each channel is present may be included in the control information in order to insure whether the NPDCH and the RPDCH exist for the current PDCH. In addition, the receiver may transfer the presence of the RPDCH even if there is no direct indicator. It may be implicitly known depending on whether a retransmission of the packet data is requested. If there is a current RPDCH, the data transmission rate of this RPDCH can be known in advance by inferring from the transmission data rate of the corresponding new transmission channel previously received. If the PDCH is an NPDCH, the data transmission rate of the NPDCH can be known by the receiver based on the transmitted control information. PDCH (i) means the i-th received PDCH. In this case, the PDCH may be an NPDCH or an RPDCH, and may refer to both the NPDCH and the RPDCH. PDCCH (i) refers to a PDCCH that delivers control information related to PDCH (i).

1 illustrates a configuration of a transmission chain (Radio Configuration) of the PDCH.                     

Referring to FIG. 1, the frame quality indicator addition block 10 may finally determine whether or not the currently transmitted data, such as a cyclic redundancy check (CRC) code, is correctly received without error. Add an error detection code to the input bit. The spare bit / encoder tail bit addition block 20 adds tail bits for the error correction encoder 30 to the output bits of the frame quality indicator addition block 20. If insertion of a spare bit is required, it is added in this spare bit / encoder tail bit addition block 20. The error correction encoder (or channel encoder) 30 is an encoder such as a convolutional encoder or a turbo encoder. The error correction encoder (or channel encoder) 30 may correct an error that may occur when data is transmitted from a transmitter to a receiver. The output bit of the spare bit / encoder tail bit addition block 20 is encoded together with the code rate R. In addition, a symbol repetition block and / or symbol puncturing block 40 may be required to match the number of output symbols of the error correction encoder 30 to a predetermined size of the channel interleaver 50. Accordingly, some of the output symbols of the error correction encoder 30 are repeated and / or eliminated. The process of repeating and / or removing some of these output symbols is called rate matching, and the block that performs such rate matching is called rate matching block. The channel interleaver 50 changes the temporal transmission order of the output symbols of the symbol repeater and / or symbol remover 40 according to a predetermined rule. The modulator 60 pre-specifies the output symbols of the channel interleaver 50 according to a modulation scheme such as Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), and 8-ary Phase Shift Keying (8PSK). Convert to a modulation symbol. As a result, the output of the modulator 60 is a real symbol or a complex symbol. In this case, the real symbol is output on the I axis or the Q axis. If complex symbols are output from the modulator 60, they are simultaneously output on the I and Q axes. The Walsh cover 70 covers the modulation symbols of the modulator 60 thus output with a pre-assigned Walsh code. The pre-assigned Walsh code is to provide a means for the receiver to distinguish between physical channels being transmitted simultaneously. Therefore, if there are several channels to transmit simultaneously, there must be as many Walsh codes as the number of channels to transmit simultaneously. Meanwhile, the length per symbol of the Walsh code to be used is determined according to the output symbol rate of the channel interleaver and the modulation scheme. However, since the number of Walsh codes available for each Walsh code length is limited, efficient use of these Walsh codes is required. Hereinafter, the length per symbol of the Walsh code is referred to as a Walsh size.

Currently, when additional PDCH is used on the reverse link channel of cdma 2000, only Walsh size = 2 and Walsh size = 4 can be used for PDCH, and two Walsh codes for each size when using BPSK and one size for each size when using QPSK As many as Walsh codes are available. Of course, the available Walsh size can be replaced by a longer Walsh size. That is, one Walsh size = 2 is available as two Walsh size = 4.

Each transport channel of the transport chain of FIG. 1 has the following characteristics.                     

Specify at least two transmission formats according to each data transmission rate of all or part of the transmission rates.

One of the at least two transmission formats is determined as the optimal transmission format for each data transmission rate. The other of the at least two transmission formats is determined as the suboptimal transmission format for each data transmission rate. That is, at least two transmission formats having priority for the data rate are allocated. The optimal transmission format for each data transmission rate is determined in consideration of the case of transmitting data on only one PDCH for a certain time interval. In other words, assuming that data is transmitted through one of the NPDCH and the RPDCH during a predetermined time interval, an optimal transmission format for the corresponding transmission channel is determined. When the data is transmitted through PDCH (referring to NPDCH or RPDCH) having a specific data transmission rate using the optimal transmission format determined as described above, additional (or other types of In addition, it may or may not be possible to simultaneously transmit data through the PDCH. In this case, when additional data is to be simultaneously transmitted, the transmission format of the additional data to be transmitted may be a modulation symbol scheme and / or Walsh of an optimal transmission format or a quasi-optimal transmission format previously assigned to the transmission rate of the additional data. It can be determined by determining whether the codes are redundant. The suboptimal transmission format for each data transmission rate is determined in consideration of the case of transmitting each data through two transmission channels for a predetermined time interval. That is, when a PDCH (referring to NPDCH or RPDCH) with a specific data transmission rate is being transmitted in a sub-optimal transmission format, it is possible to simultaneously transmit data on an additional (or other type) PDCH.

The transmission efficiency of a suboptimal transmission format for a particular data transmission rate can be very bad. In such a case, the suboptimal transmission format may be excluded. That is, the data transfer rate only has an optimal transmission format. Due to the characteristics of the above-mentioned optimal transmission format, when a PDCH of a data transmission rate having only an optimal transmission format is transmitted, additional (different types) of PDCHs may be additionally transmitted simultaneously depending on what the specific data transmission rate is. It may not be possible.

For convenience of description, hereinafter, it will be described on the assumption that there are N data transmission rates in total. At this time, the optimal transmission format for the nth data transmission rate is called n-MCS, and the suboptimal transmission format is called n'-MCS. That is, the optimal transmission format for the third data transmission rate is 3-MCS, and the suboptimal transmission format is 3'-MCS. At this time, n is an integer between 0 and N-1. In addition, the table which summarizes the transmission formats for each data transmission rate is called MCS-table. This is shown in Table 1. Hereinafter, the data transmission rate of NPDCH is referred to as D-NPDCH, and the data transmission rate of RPDCH is referred to as D-RPDCH. D-NPDCH = n or D-RPDCH = n means that the data transmission rate of NPDCH or RPDCH is the nth data transmission rate on the MCS table. However, when the value of D-NPDCH or D-RPDCH corresponds to the data transmission rate 0, this means that the corresponding PDCH is not transmitted. Hereinafter, for convenience of explanation, it is assumed that the 0 th data transmission rate corresponds to 0 on the MCS table.                     

2 is a procedure for a method of determining a transmission format of a PDCH of a transmitter according to the present invention.

Referring to FIG. 2, it is determined whether to transmit data through one of the RPDCH and the NPDCH or through all of the transport channels. (S10) For example, a request for retransmission of packet data previously transmitted from the receiving end is performed. If is, the data transmission rate of the packet data to be retransmitted is determined, and the retransmission power is determined for this determined data transmission rate. If there is extra transmission power except for the retransmission power, this extra transmission power is allocated for newly transmitted packet data. The transmission rate of the newly transmitted packet data is determined according to the amount of transmission power allocated to the newly transmitted packet data. By this process, the transmitter determines whether to transmit the retransmission channel or the new transmission channel, or whether to transmit both the retransmission channel and the new transmission channel.

The D-NPDCH and / or D-RPDCH, which is the data transmission rate of the transport channel NPDCH and / or RPDCH determined as described above, is determined. (S11) Then, the type of the transport format of the NPDCH and / or RPDCH is MCS level) is determined with reference to Tables 1 to 3. (S12) For example, when D-RPDCH is 0 and D-NPDCH is 0 (S13), that is, when no transport channel is transmitted, Since the transport format determination process is unnecessary, a process (S10) of determining whether to transmit the corresponding data through one of the NPDCH and the RPDCH or all the transport channels is performed to determine the transport format of the next PDCH. When D-RPDCH is 0 and D-NPDCH is a data transmission rate of n-MCS level (n> 0) (S14), or D-RPDCH is a data transmission rate of m-MCS level (m> 0) and D If the -RNPDCH is 0 (S15), i.e., if the corresponding data is transmitted through one transport channel, the corresponding PDCH (i) (RPDCH (i) or NPDCH (i)) is m-MCS level or n-MCS. The corresponding data is transmitted using a level transport format (S18, S19). A process of determining whether to transmit the corresponding data through one of NPDCH and RPDCH or all transport channels for determining a transmission format of the next PDCH is performed. (S10)

When the D-RPDCH is a data transmission rate of the m-MCS (m> 0) level and the D-NPDCH is a data transmission rate of the n (n> 0) -MCS level, that is, data is transmitted through both the RPDCH and the NPDCH. If it is desired, it is determined whether data can be simultaneously transmitted using both transport channels (S16). In this case, whether data is transmitted through both transport channels is determined between optimal transport formats, semi-optimal transport formats, and optimal transport formats that are previously allocated to the transmission rates of data to be transmitted through the transport channels. Format Versus It can be determined by determining whether or not duplication of communication resources such as Walsh codes between optimal transmission formats. In this case, an optimal transmission format is first assigned to a transmission channel having a priority and it is determined whether communication resources are redundant. If data can be transmitted through both transport channels, for example, if Walsh codes do not overlap in the determined transport formats, the transport format of the NPDCH is n-MCS, and the transport format of the RPDCH is Determined by m-MCS. PDCH (i) (RPDCH (i) and NPDCH (i)) are transmitted according to the n-MCS transport format and the m-MCS transport format. (S20) However, both transport channels cannot be used. If, for example, Walsh codes overlap in the determined transmission formats, the transmission format of the RPDCH is determined as m'-MCS. Then, it is determined whether new transmission data can be transmitted through the NPDCH in the n-MCS transmission format simultaneously with the RPDCH of the m'-MCS transmission format. When the new transmission data can be transmitted through the NPDCH in the transmission format of the MCS, for example, when the Walsh code of the m'-MCS transmission format and the Walsh code of the n-MCS transmission format do not overlap, the NPDCH The transmission format of is determined by n-MCS. PDCH (i) (RPDCH (i) and NPDCH (i)) are transmitted in the n-MCS transmission format and the m'-MCS transmission format. (S20) As described above, the priority transmission channel (RPDCH) Alternatively, a transport format of n-MCS level, which is an optimal transport format, may be allocated to NPDCH). However, when the new transmission data cannot be transmitted through the NPDCH in the n-MCS transmission format simultaneously with the RPDCH in the m'-MCS transmission format (S17), for example, the Walsh code of the m'-MCS transmission format and n When Walsh codes of the transport format of the MCS overlap, the transport format of the NPDCH is determined as n'-MCS. PDCH (i) (RPDCH (i) and NPDCH (i)) are transmitted in the m'-MCS transport format and the n'-MCS transport format. (S21) In the process of determining the transport formats as described above, If a new transmission channel for the newly transmitted packet data is prioritized so that the new transmission packet channel transmits data according to an optimal transmission format, but if the priority is given to the retransmission channel for the retransmission packet, The process can be changed.

3 illustrates a reception procedure of a PDCH at a receiving end according to the present invention.

Referring to FIG. 3, in order to receive an NPDCH and / or an RPDCH at a receiver, first, information about a transmission format of each PDCH must be known. Therefore, the receiving end keeps the received PDCH (i) in a signal processing wait state (it can be temporarily stored) until the transmission format information is known, and acquires control information from the received PDCCH (i). This control information may include an indicator as to whether the received PDCH (i) includes one of a new transmission channel and a retransmission channel, or both the retransmission channel and the new transmission channels. If the received PDCH (i) includes a new transport channel, the received PDCH (i) may also include information on the transmission rate of packet data on the new transport channel. If the received PDCH (i) includes a retransmission channel, the transmission rate of the packet data on the retransmission channel can be estimated based on the transmission rate of the initial transmission packet data of the retransmission packet data. Accordingly, the receiving end may know the data transmission rate D-NPDCH of the new transmission channel and / or the data transmission rate D-RPDCH of the retransmission channel. These data transmission rates can be indicated by m and n, which means that they are the data transmission rate of the m-MCS level and the data transmission rate of the n-MCS level, respectively. (S31) The receiving end can determine the transmission format of each transmission channel based on these data transmission rates and Tables 1-3.

If the D-RPDCH is 0 and the D-NPDCH is 0 (S32), i.e., when no transport channel is received, the transport format determination process is unnecessary, so that the transport format determination of the next PDCH (i + 1) is performed. To perform. When D-RPDCH is 0 and D-NPDCH is a data transmission rate of n-MCS level (n> 0) (S33), or D-RPDCH is a data transmission rate of n-MCS level (n> 0) and D- When the RNPDCH is 0 (S34), that is, when the corresponding data is received through one transport channel, the received PDCH (i) (RPDCH (i) or NPDCH (i)) is n-MCS level or m-MCS. A PDCCH (i + 1) and a PDCH (i + 1) are received to determine a transmission format of the next PDCH (i + 1). (S30).

If the D-RPDCH is a data transmission rate of the m-MCS (m> 0) level and the D-NPDCH is a data transmission rate of the n (n> 0) -MCS level, the transmitting end transmits data through both transport channels. Whether it is possible to transmit is determined based on the D-RPDCH and / or D-NPDCH known above, Tables 1 to 3 (S35). In this case, communication resources such as Walsh codes between optimal transport formats, quasi-optimal transport formats, and optimal transport format to sub-optimal transport formats, which are previously allocated for the transmission rates of data transmitted through both transport channels, are used. The redundancy may be determined to determine whether transmission is possible. At this time, it is assumed that an optimal transmission format is allocated to a transmission channel of priority first, and it is determined whether communication resources are redundant. If it is possible to transmit data on both transport channels from the transmitter's point of view, for example, if the Walsh codes do not overlap in the transport formats of the two transport channels, then the transport format of the NPDCH is n. With -MCS, the transmission format of the RPDCH is determined with m-MCS. PDCH (i) (RPDCH (i) and NPDCH (i)) is received according to the n-MCS transmission format and the m-MCS transmission format (S39). However, if both transport channels are not available, for example, if Walsh codes overlap in the transport formats of the two transport channels from the transmitter's point of view, the transport format of the RPDCH is determined to be m'-MCS. do. Then, from the viewpoint of the transmitting end, it is determined whether it is possible to transmit new transmission data through the NPDCH in the transmission format of the n-MCS simultaneously with the RPDCH of this m'-MCS transmission format (S36). When it is possible to transmit new transmission data through the NPDCH in the transmission format of the n-MCS simultaneously with the RPDCH of the MCS transmission format, for example, the Walsh code of the m'-MCS transmission format and the n-MCS transmission format If the Walsh codes do not overlap, the transport format of this NPDCH is determined by n-MCS. PDCH (i) (RPDCH (i) and NPDCH (i)) are received according to the m'-MCS transmission format and the n-MCS transmission format (S40). As described above, a transport format of n-MCS level, which is an optimal transport format, may be allocated to a transport channel (RPDCH or NPDCH) of priority. However, when it is impossible to transmit new transmission data through the NPDCH in the n-MCS transmission format simultaneously with the RPDCH in the m'-MCS transmission format from the transmitter's point of view (S36), for example, in the m'-MCS transmission format, When the Walsh code and the Walsh code of the transport format of n-MCS overlap, the transport format of this NPDCH is determined as n'-MCS. PDCH (i) (RPDCH (i) and NPDCH (i)) is received according to the m'-MCS transmission format and the n'-MCS transmission format. (S41) In the process of determining the above transmission format, If a new transmission channel for the newly transmitted packet data is prioritized so that this new transmission packet channel transmits data in an optimal transmission format, but the priority is given to the retransmission channel for the retransmission packet, Can be changed.

If the n'-MCS does not exist for the nth data transmission rate on the MCS table, the PDCH (i) is received at the receiver of FIG. 3 or in the rule for the method of determining the transmission format of the PDCH at the transmitter side described in FIG. The part is removed from the procedure.

Table 1 below shows an MCS table for a system with 16 data transfer rates.

TABLE 1

A B C D E F G H I J K L L N Data transfer rate type (n) k-MCS or k'-MCS Bits per frame CRC bit count Spare bits Tail beats B + C + D + E Data transfer rate (kbps) 1 / R Repeat symbol
Rate Number of removed symbols Interleaver size Symbol transmission rate
(kbps) Modulation method Walsh size 0 0 0 0 0 0 0 0.0 - - - - - - - One One 168 16 2 6 192 9.6 4.00 2 0 1536 76.8 BPSK 16.0 2 2 360 16 2 6 384 19.2 4.00 One 0 1536 76.8 BPSK 16.0 3 3 744 16 2 6 768 38.4 4.00 One 0 3072 153.6 BPSK 8.0 4 4 1512 16 2 6 1536 76.8 4.00 One 0 6144 307.2 BPSK 4.0 5 5 3048 16 2 6 3072 153.6 4.00 One 0 12288 614.4 QPSK 4.0 6 6
6 ' 6120
6120 16
16 2
2 6
6 6144
6144 307.2
307.2 4.00
4.00 One
One 0
12288 24576
12288 1228.8
614.4 QPSK
QPSK 2.0
4.0 7 7
7 ' 7656
7656 16
16 2
2 6
6 7680
7680 384.0
384.0 4.00
4.00 One
One 6144
18432 24576
12288 1228.8
614.4 QPSK
QPSK 2.0
4.0 8 8
8' 8168
8168 16
16 2
2 6
6 8192
8192 409.6
409.6 3.00
3.00 One
One 0
12288 24576
12288 1228.8
614.4 QPSK
QPSK 2.0
4.0 9 9
9 ' 9192
9192 16
16 2
2 6
6 9216
9216 460.8
460.8 3.00
3.00 One
One 3072
15360 24576
12288 1228.8
614.4 QPSK
QPSK 2.0
4.0 10 10
10 ' 10344
10344 16
16 2
2 6
6 10368
10368 518.4
518.4 3.00
3.00 One
One 6528
18816 24576
12288 614.4
1228.8 QPSK
QPSK 2.0
4.0 11 11
11 ' 12264
12264 16
16 2
2 6
6 12288
12288 614.4
614.4 2.00
2.00 One
One 0
12288 24576
12288 614.4
614.4 QPSK
QPSK 2.0
4.0 12 12
12 ' 15336
15336 16
16 2
2 6
6 15360
15360 768.0
768.0 2.00
2.00 One
One 6144
18432 24576
12288 1228.8
614.4 QPSK
QPSK 2.0
4.0 13 13
13 ' 16360
16360 16
16 2
2 6
6 16384
16384 819.2
819.2 2.00
2.00 One
One 8192
20480 24576
12288 1228.8
614.4 QPSK
QPSK 2.0
4.0 14 14
14 ' 20456
20456 16
16 2
2 6
6 20480
20480 1024.0
1024.0 2.00
2.00 One
One 4096
22528 36864
18432 1843.2
921.6 8PSK
8PSK 2.0
4.0 15 15
15 ' 24552
24552 16
16 2
2 6
6 24576
24576 1228.8
1228.8 2.00
2.00 One
One 12288
30720 36864
18432 1843.2
921.6 8PSK
8PSK 2.0
4.0

If the method of determining the transmission format of the PDCH on the transmitter side described above is applied based on the MCS table example of Table 1, the following rules may be established.

In general, NPDCH has the optimal transmission format.

RPDCH uses the optimal transport format. However, if both NPDCH and RPDCH data transmission rates are equal to or greater than 307.2kbps, the quasi-optimal format is used for the RPDCH.

가 (++--)이고, 왈쉬 사이즈가 2인 왈쉬 코드

가 (+-)인 경우, 표 1의 각 데이터 전송 레이트의 전송 포맷이 사용할 왈쉬 코드는 여러 가지 다양한 규칙들에 따라 정해질 수 있다. 다음은 왈쉬 코드의 이용 예를 설명한 것이다.In Table 1, Walsh sizes are 4 and 2. Walsh code with Walsh size of 4.

Is a Walsh code with (++-) and a Walsh size of 2.

If is (+-), the Walsh code to be used by the transmission format of each data transmission rate of Table 1 may be determined according to various various rules. The following is an example of using the Walsh code.

(++--)를 이용 가능할 경우는 반드시

(++--)를 이용한다.

(++--)가 이용 가능하지 않을 경우에는

(+-)를 사용한다. 특히, 사용하는 변조 방식이 BPSK일 경우, I 축과 Q 축 중에서 어느 쪽을 사용할 지에 대하여 미리 지정한다. 본 예제에서는 Q축을 사용하는 것을 가정한다. When data is transmitted through either channel of NPDCH and RPDCH,

(++-) must be available when available

(++-) is used.

(++-) is not available

Use (+-). In particular, when the modulation scheme to be used is BPSK, it is specified in advance which of the I and Q axes to use. This example assumes the use of the Q axis.

(++--)를 사용하고, RPDCH는

(+-)을 사용한다.When data is transmitted on both NPDCH and RPDCH, when the data transmission rate of NPDCH is less than 307.2 kbps, NPDCH is

(++-) and RPDCH

Use (+-).

(+-)을 사용하고, RPDCH는

(++--)을 사용한다. 이때,

은 사이즈가 b인 왈쉬 코드 중 a 번째 왈쉬 코드를 의미한다. 일반적으로, 사이즈가 b인 왈쉬 코드들의 수는 b개 존재한다. 만일, MCS 테이블 상에서 특정 데이터 전송 레이트에 대한 왈쉬 사이즈와 상기 규칙에 따라 실재 할당된 왈쉬 코드의 사이즈가 다를 경우에는, 필요한 만큼 할당된 왈쉬 코드를 반복해서 사용한다. 예를 들어, MCS 테이블 상에서 왈쉬 사이즈가 16이지만, 실재 할당된 왈쉬 코드가

(++--)일 경우,

(++--)를 네 번 반복해서, 마치 왈쉬 사이즈가 16인 것처럼 사용한다. 이때, 이 반복 수를 편이상 왈쉬 코드 반복수라고 나타낸다. If the data transfer rate of the NPDCH is greater than or equal to 307.2 kbps, the NPDCH is

(+-) And RPDCH is

(++-) is used. At this time,

Denotes the a th Walsh code among the Walsh codes of size b. In general, there are b Walsh codes of size b. If the Walsh size for a specific data transmission rate on the MCS table and the size of the Walsh code actually allocated according to the rule are different, the Walsh code allocated as necessary is repeatedly used. For example, if the Walsh size is 16 on the MCS table, but the Walsh code actually assigned is

(++-)

Repeat (++-) four times, using Walsh size 16. At this time, this repetition number is referred to as Walsh code repetition number.

When using the Walsh code as described above, the use of the Walsh code for each case of Table 1 is shown in Table 2 and Table 3. Table 2 shows Walsh code usage for only one of the NPDCH and RPDCH. Table 3 shows Walsh code usage for the case where both NPDCH and RPDCH are transmitted.

TABLE 2

NPDCH RPDCH Walsh Code Symbol transmission rate (kbps) Walsh Code Iterations Walsh Code Symbol transmission rate (kbps) Walsh Code Iterations

=(+-)

= (+-) 614.4 / M M = 2,4,8 Not supported 1228.8 / M M = 1,2 1843.2 / M M = 1

= (++-) 307.2 / M M = 1,2,4 Not supported 614.4 / M M = 1 Not supported

= (+-) 614.4 / M M = 2,4,8 1228.8 / M M = 1,2 1843.2 / M M = 1 Not supported

= (++-) 307.2 / M M = 1.2.4 614.4 / M M = 1

[Table 3]

NPDCH RPDCH Walsh Code Symbol transmission rate (kbps) Walsh Code Iterations Walsh Code Symbol transmission rate (kbps) Walsh Code Iterations

=(+-)

= (+-) 1843.2 / M M = 1

= (++-) 307.2 / M M = 1,2,4 614.4 / M M = 1 921.6 / M M = 1

= (+-) 1228.8 / M M = 1

= (++-) 307.2 / M M = 1,2,4 614.4 / M M = 1 921.6 / M M = 1

= (++-) 614.4 / M M = 1

= (+-) 614.4 / M M = 2,4,8 1228.8 / M M = 1,2 1843.2 / M M = 1

= (++-) 307.2 / M M = 1,2,4

= (+-) 614.4 / M M = 2,4,8 1228.8 / M M = 1,2 1843.2 / M M = 1

As described above, the present invention has the effect of preventing waste of transmission power at the transmitting end.

Even when a conventional semi-optimal transmission format is used, if the transmission format method is determined according to the present invention, the optimal transmission format can be used, thereby enabling efficient transmission and reception.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (11)

delete delete Select a first data transmission format of the one or more first transmission formats pre-allocated for the first data transmission rate and a second data transmission format of the one or more second transmission formats pre-allocated for the second data transmission rate Doing; And Transmitting data at the first and second data transmission rates respectively corresponding to the selected first and second data transmission formats, respectively. The selected first and second data transmission formats each include at least one of a first priority transmission format and a second priority transmission format, and different communication resources are allocated to the selected first and second data transmission formats, respectively. If so, selecting a first priority transmission format from the first and second data transmission formats, respectively. The method of claim 3, wherein The communication resource is a Walsh code. delete delete The method of claim 3, wherein Selecting each of the transport formats, Selecting a second priority transmission format for low priority data when the communication resources of the first priority transmission formats respectively selected from among the transmission formats previously allocated for the first and second data transmission rates overlap. Method for transmitting data, characterized in that. Determining at least one type of transport channel for transmitting packet data; Determining a packet data transmission rate on the determined type of transport channel; And Transmitting the packet data over a transport channel of the determined type according to a higher priority transport format of one or more predetermined transport formats for the determined transport rate, And the type of the transmission channel is a new transmission channel or a retransmission channel. The method of claim 8, Determining the packet data transmission rate, And when there are two or more types of the determined transmission channel, determining a data rate and a transmission format according to each type. The method of claim 8, The step of transmitting the packet data, Determining whether the communication resource is redundant with respect to the determined transmission formats of the transmission channels when there are two or more types of the determined transmission channels; And If the communication resources are overlapping, changing the transmission format of the lower priority transmission channel to a lower priority transmission format. delete

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