CN101932005B - Method and device for reserving and index-mapping dynamic physical uplink control channel resources - Google Patents

Abstract

The present invention discloses a method for dynamic physical uplink control channel (PUCCH) resource reservation and index mapping, comprising: dividing the dynamic PUCCH resources required by each downlink component carrier into a plurality of sub-blocks, and dividing the first sub-block of each downlink component carrier The size of the dynamic PUCCH resource corresponding to a sub-block is configured to be greater than or equal to the size of the dynamic PUCCH resource required by the LTE Rel-8 terminal, so that the dynamic PUCCH resource required by the LTE Rel-8 terminal is located in the first downlink component carrier In the sub-block; the sub-blocks are arranged according to the interleaved mapping of the downlink component carrier index; based on the above configuration, the i+1th downlink component carrier is calculated according to the first control channel element index corresponding to the physical downlink control channel on the i+1th downlink component carrier. A dynamic PUCCH resource index corresponding to one downlink component carrier. The invention also discloses a device for dynamic PUCCH resource reservation and index mapping.

Description

Method and device for dynamic physical uplink control channel resource reservation and index mapping

technical field

The present invention relates to resource reservation technology in Long Term Evolution (LTE, Long Term Evolution), in particular to a method and device for dynamic Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel) resource reservation and index mapping under large bandwidth.

Background technique

At present, the Advanced International Mobile Telecommunications (IMT-Advanced, International Mobile Telecommunications-Advanced) system can realize high-speed data transmission and has a relatively large system capacity. In the case of low-speed mobile and hotspot coverage, the peak rate of the IMT-Advanced system can reach 1Gbit/s; in the case of high-speed mobile and wide-area coverage, the peak rate of the IMT-Advanced system can reach 100Mbit/s.

In order to meet the requirements of the advanced International Telecommunication Union (ITU-Advanced, International Telecommunication Union-Advanced), the LTE-Advanced, Long Term Evolution-Advanced (LTE-Advanced, Long Term Evolution-Advanced) system, which is the evolution standard of LTE, needs to support a larger system bandwidth (the bandwidth is the highest up to 100MHz), and needs to be backward compatible with existing LTE standards. On the basis of the existing LTE system, the bandwidth of the LTE system can be combined to obtain a larger bandwidth. This technology is called carrier aggregation (CA, Carrier Aggregation) technology. The CA technology can improve the spectrum utilization rate of the IMT-Advanced system, alleviate the shortage of spectrum resources, and optimize the utilization of spectrum resources.

LTE defines a Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) for carrying scheduling allocation and other control information, and a PUCCH for feeding back control information of each downlink carrier. Each PDCCH is composed of several control channel elements (CCE, Control ChannelElement), and the CCEs of each subframe are indexed according to the sequence numbers in the frequency domain and then the time domain. In order to ensure that the base station can correctly receive the control information fed back by the user equipment (UE), LTE also defines the relationship between the PUCCH index and the CCE index of the PDCCH, that is, the CCE index plus a certain offset is the PUCCH index. In addition, as shown in Figure 1, in the LTE system, PUCCH resources are distributed at both ends of the uplink carrier bandwidth, while Physical Uplink Shared Channel (PUSCH) resources are located in the middle of the uplink carrier bandwidth, so that the unoccupied PUCCH resources can be used Transmitted on PUSCH. In addition, TTI in FIG. 1 represents a transmission time interval.

In the LTE-Advanced system, the number of uplink and downlink component carriers may be different, that is, the uplink and downlink behaviors are asymmetric carrier aggregation. In this case, it is necessary to reserve dynamic PUCCH resources for multiple downlink component carriers on a single uplink component carrier. .

Currently, in the LTE-Advanced system, a method for reserving dynamic PUCCH resources is: dividing the dynamic PUCCH resources required by each downlink component carrier into multiple parts according to the downlink component carriers, and different parts correspond to different downlink component carriers. For example, as shown in FIG. 2, if there are three downlink component carriers, the dynamic PUCCH resources are divided into three parts. The first part is the dynamic PUCCCH resource mapping area of the downlink component carrier 1, and so on. It should be noted here that since the dynamic PUCCH resources distributed at both ends of the uplink carrier bandwidth are symmetrical, the downlink component carriers corresponding to the dynamic PUCCH resources at both ends are also symmetrical, which is also applicable to the present invention described below. The above method is relatively simple and compatible with LTE version-8 (Rel-8, Release-8) terminals in the LTE-Advanced system, but due to the dynamic change of the dynamic PUCCH resources required by each downlink component carrier, the PUSCH Resources are allocated in a continuous manner, so there will be a problem that a large number of dynamic PUCCH resources cannot be used for PUSCH transmission, resulting in waste of resources. Another method is: the dynamic PUCCH resource required by each downlink component carrier adopts the resource reservation method of block interleaving on the uplink component carrier, that is, the dynamic PUCCH resource required by each downlink component carrier is based on the OFDM occupied by the PDCCH Use (OFDM) symbols to divide into multiple sub-blocks, and arrange these sub-blocks according to the downlink component carrier index interleaving mapping. For example, as shown in Figure 3, the dynamic PUCCH resources required by downlink component carriers 1, 2, and 3 are each divided into three sub-blocks, and these sub-blocks are interleaved and mapped according to the downlink component carrier index, that is, the order of the downlink component carriers. Compared with the first method described above, this method can save a part of dynamic PUCCH resources for PUSCH transmission under certain conditions. For example, the size of the dynamic PUCCH resource required by downlink component carrier 3 is exactly located in the first sub-block of downlink component carrier 3 (that is, counting from top to bottom or bottom to top, the first dynamic PUCCH of downlink component carrier 3 In this way, the dynamic PUCCH resources corresponding to the saved third sub-block (ie, the dynamic PUCCH resource mapping area of the downlink component carrier 3 closest to the PUSCH) can be used for PUSCH transmission. However, this method also has the following disadvantages: since the number of sub-blocks is fixed, the size of each sub-block is the same, and the sub-blocks are staggered, this will cause the mapping relationship between the PUCCH index and the CCE index of the PDCCH to be unsuitable for LTE- LTE Rel-8 terminals in the Advanced system, that is to say, this method is not compatible with LTE Rel-8 terminals.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method and device for dynamic PUCCH resource reservation and index mapping, which can be compatible with LTE Rel-8 terminals.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for dynamic PUCCH resource reservation and index mapping, comprising:

Divide the dynamic PUCCH resource required by each downlink component carrier into multiple sub-blocks, and configure the size of the dynamic PUCCH resource corresponding to the first sub-block of each downlink component carrier to be greater than or equal to the dynamic PUCCH resource required by the LTE Rel-8 terminal , so that the dynamic PUCCH resource required by the LTE Rel-8 terminal is located in the first sub-block of the downlink component carrier;

Arranging the sub-blocks according to the downlink component carrier index interleaving mapping;

Based on the above configuration, calculate the dynamic PUCCH resource index n _{PUCCH,i corresponding to the i+1th downlink component carrier according to the first CCE index n CCE, i corresponding to the PDCCH on the i+1th downlink component carrier,} where i is Downlink component carrier index.

Wherein, the method calculates the dynamic PUCCH resource index n _PUCCH,i corresponding to the i+1th downlink component carrier according to the formula (a):

n _{PUCCH, i} = n _{CCE, i} + (N _PUCCH + i×N ₁ ) (a)

Wherein, n _{PUCCH, i} is the dynamic PUCHH resource index corresponding to the i+1th downlink component carrier;

n _{CCE, i} is the first CCE index corresponding to the PDCCH on the i+1th downlink component carrier;

N _PUCCH is a semi-static configuration parameter;

i is the downlink component carrier index;

N ₁ is the size of the dynamic PUCCH resource corresponding to the first sub-block of the i+1th downlink component carrier.

Wherein, the formula (a) is derived according to the formula (b):

n _{PUCCH, i} = (Mi-1) × N _p + i × N _{p + 1} + n _{CCE, i} + N _PUCCH (b)

Wherein, n _{PUCCH, i} is the dynamic PUCCH resource index corresponding to the i+1th downlink component carrier;

M is the number of downlink component carriers;

i is the index of the downlink component carrier, and the value is 0, 1, ..., M-1;

p is the subblock index of the i+1th downlink component carrier;

N _p is the size of the dynamic PUCCH resource corresponding to the first p sub-blocks of the i+1th downlink component carrier, where N ₀ =0, and the selection of p satisfies N _p <n _{CCE, i} <N _p+1 ;

n _{CCE, i} is the first CCE index corresponding to the PDCCH on the i+1th downlink component carrier;

N _PUCCH is a semi-static configuration parameter.

Wherein, it is characterized in that the size of the dynamic PUCCH resource corresponding to the sub-block is configured semi-statically.

Wherein, the number of sub-blocks is configured statically or semi-statically.

A device for dynamic PUCCH resource reservation and index mapping, comprising:

The sub-block configuration module is used to divide the dynamic PUCCH resources required by each downlink component carrier into multiple sub-blocks, and configure the size of the dynamic PUCCH resource corresponding to the first sub-block of each downlink component carrier to be greater than or equal to LTE Rel- 8 The size of the dynamic PUCCH resources required by the terminal, so that the dynamic PUCCH resources required by the LTE Rel-8 terminal are located in the first sub-block of the downlink component carrier;

A sub-block arrangement module, configured to arrange the sub-blocks according to the downlink component carrier index interleaving mapping; and

The dynamic PUCCH resource index calculation module is used to calculate the dynamic PUCCH resource index corresponding to the i+1th downlink component carrier according to the first CCE index _nCCE of the corresponding physical downlink control channel PDCCH on the i+1th downlink component carrier n _PUCCH,i , where i is the downlink component carrier index.

Wherein, the size of the dynamic PUCCH resource corresponding to the sub-block is a semi-static configuration.

Wherein, the number of sub-blocks is configured statically or semi-statically.

It can be seen from the above technical solutions that the present invention configures the size of the dynamic PUCCH resource corresponding to the first sub-block of each downlink component carrier to be greater than or equal to the size of the dynamic PUCCH resource required by the LTE Rel-8 terminal, so that the LTE Rel-8 terminal 8 The dynamic PUCCH resources required by the terminal are all located in the first sub-block of the downlink component carrier, so that the mapping relationship between the PUCCH index and the CCE index of the PDCCH applicable to the LTE Rel-8 terminal is obtained, so the present invention is compatible with the LTE Rel-8 8 terminals. Further, the number of sub-blocks and the dynamic PUCCH resources corresponding to the sub-blocks in the present invention can be semi-statically configured, so the configuration can be changed according to the change of the dynamic PUCCH resources required by each downlink component carrier, thereby saving more dynamic resources. PUCCH resources are used for PUSCH transmission. In addition, the present invention is also applicable to LTE-A terminals.

Description of drawings

FIG. 1 is a schematic diagram of distribution of PUCCH resources and PUSCH resources in an LTE system;

FIG. 2 is a schematic diagram of dynamic PUCCH resource reservation required by each downlink component carrier in the prior art;

FIG. 3 is another schematic diagram of dynamic PUCCH resource reservation required by each downlink component carrier in the prior art;

FIG. 4 is a schematic flowchart of a method for dynamic PUCCH resource reservation and index mapping in the present invention;

FIG. 5 is a schematic diagram of dynamic PUCCH resource reservation according to a specific embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an apparatus for dynamic PUCCH resource reservation and index mapping according to the present invention.

Detailed ways

Before describing the technical solution of the present invention in detail, the basic principle of the method for dynamic PUCCH resource reservation and index mapping of the present invention is firstly introduced.

First of all, the dynamic PUCCH resources required by each downlink component carrier still adopt the resource reservation method of block interleaving on the uplink component carrier, specifically: first divide the dynamic PUCCH resources required by each downlink component carrier into multiple sub-blocks, and each The size of the dynamic PUCCH resources corresponding to the sub-blocks is semi-statically configured by the upper layer; then these sub-blocks are arranged according to the downlink component carrier index interleaving mapping.

Further, the number of sub-blocks of each downlink component carrier can also be statically configured by the high layer, that is, the number of sub-blocks can be fixed; it can also be semi-statically configured by the high layer, that is, the number of sub-blocks of each downlink component carrier can be changed of. Wherein, the high layer refers to the radio resource control (RRC) layer.

Although the present invention also adopts the resource reservation method of block interleaving, compared with the prior art, there is the following difference: the dynamic PUCCH resources corresponding to the sub-blocks in the present invention are semi-statically configured, so they can be configured according to the needs of each downlink component carrier. The dynamic PUCCH resources can be configured according to the changes of the dynamic PUCCH resources, so that more dynamic PUCCH resources can be saved for PUSCH transmission; in addition, the number of sub-blocks can also be configured semi-statically, so dynamic PUCCH resources can also be saved under certain conditions Used for PUSCH transmission.

In addition, it should be noted that the number of sub-blocks of different downlink component carriers should be the same, and the size of sub-blocks with the same index of different downlink component carriers should also be the same. For example, assuming that there are two downlink component carriers 1 and 2, if the dynamic PUCCH resources required by the downlink component carrier are divided into three sub-blocks, the dynamic PUCCH resources required by the downlink component carrier 2 should also be divided into three sub-blocks; , the sizes of the first sub-blocks of the downlink component carriers 1 and 2 should be the same, and so on for the others. The above requirements are specified by existing protocols and are the prerequisites for formula (1) to be described below.

On the basis of the above dynamic PUCCH resource reservation and related configuration, according to the existing protocol, in the LTE-Advanced system, for different terminals, calculate the dynamic PUCCH resource index corresponding to the i+1th downlink component carrier according to formula (1) n _{PUCCH, i} :

n _{PUCCH, i} = (Mi-1) × N _p + i × N _{p + 1} + n _{CCE, i} + N _PUCCH (1)

Wherein, n _{PUCCH, i} is the dynamic PUCCH resource index corresponding to the i+1th downlink component carrier;

M is the number of downlink component carriers;

i is the index of the downlink component carrier, and the value is 0, 1, ..., M-1;

p is the sub-block index of the i+1th downlink component carrier; for example, a downlink component carrier corresponds to 3 sub-blocks, then the value of p is 0, 1, 2, 3; where p is 0 to indicate the starting point of the sub-block The starting point, p is 1 means the first sub-block, and so on;

N _p is the size of the dynamic PUCCH resource corresponding to the first p sub-blocks of the i+1th downlink component carrier, N _p is obtained from the size of the dynamic PUCCH resource corresponding to each sub-block semi-statically configured by the upper layer, where N ₀ =0, And the selection of p should satisfy N _p <n _{CCE, i} < N _p+1 , and when p is 0, it indicates that the dynamic PUCCH resource required by the i+1th downlink component carrier is located in the first sub-block;

n _{CCE, i} is the first CCE index corresponding to the PDCCH on the i+1th downlink component carrier;

N _PUCCH is a semi-static configuration parameter configured by higher layers.

Formula (1) is a general formula for calculating dynamic PUCCH resource index n _PUCCH,i by different terminals in LTE-Advanced system, but this formula is not applicable to LTE Rel-8 terminals in LTE-Advanced system, because the formula (1) It does not meet the requirement that the dynamic PUCCH resource index is equal to the CCE index plus a certain offset.

For this reason, the present invention makes the following improvements: when the size of the dynamic PUCCH resource corresponding to each sub-block is semi-statically configured at the upper layer, the size of the dynamic PUCCH resource corresponding to the first sub-block of each downlink component carrier is configured to be greater than or equal to the size of the LTE The size of the dynamic PUCCH resource required by the Rel-8 terminal, so that the dynamic PUCCH resource required by the LTE Rel-8 terminal is located in the first sub-block of the downlink component carrier.

Among them, the dynamic PUCCH resources required by the LTE Rel-8 terminal are all located in the first sub-block of the downlink component carrier as follows: assuming that there are two LTE Rel-8 terminals and two downlink component carriers, the first The dynamic PUCCH resource required by an LTE Rel-8 terminal is located in the first sub-block of one of the downlink component carriers, and the same is true for the second LTE Rel-8 terminal. This is the prior art and will not be repeated here. In addition, if the dynamic PUCCH resources required by all LTE Rel-8 terminals are located in the first sub-block of the same downlink component carrier, the size of the dynamic PUCCH resource corresponding to the first sub-block of the downlink component carrier needs to be Configured to be greater than or equal to the size of the dynamic PUCCH resource required by LTE Rel-8 terminals, which not only meets the requirements of these existing LTE Rel-8 terminals, but also accommodates more when the number of LTE Rel-8 terminals increases in the actual process Dynamic PUCCH resources required by multiple LTE Rel-8 terminals.

Based on the above improvements, since the required dynamic PUCCH resource is located in the first sub-block, p is equal to 0, so that formula (2) can be obtained:

n _{PUCCH, i} = (Mi-1) × N _p + i × N _{p + 1} + n _{CCE, i} + N _PUCCH

=(Mi-1)×0+i×N ₁ +n _{CCE, i} +N _PUCCH (2)

=n _CCE,i +(N _PUCCH +i×N ₁ )

In formula (2), (N _PUCCH +i×N ₁ ) is a combination of multiple semi-static configuration parameters configured by higher layers. Therefore, formula (2) can be rewritten as formula (3):

n _{PUCCH, i} = n _{CCE, i} + N (3)

Wherein, N=N _PUCCH +i×N ₁ .

It can be seen from formula (3) that the dynamic PUCCH resource index is equal to the CCE index plus a certain offset, so the present invention is compatible with LTE Rel-8 terminals, that is, LTE Rel-8 terminals can be calculated according to formula (2) The dynamic PUCCH resource index n _PUCCH,i corresponding to the i+1th downlink component carrier.

In addition, it should be noted that in addition to LTE Rel-8 terminals, LTE-A terminals also exist in the LTE-Advanced system. The LTE-Advanced system is designed based on LTE-A terminals, so formula (1) can be directly applied to LTE-A terminals, and the improvements made in the present invention are also applicable to LTE-A terminals.

As shown in Figure 4, the method for dynamic PUCCH resource reservation and index mapping of the present invention includes the following steps:

Step 401, divide the dynamic PUCCH resources required by each downlink component carrier into a plurality of sub-blocks, and configure the size of the dynamic PUCCH resource corresponding to the first sub-block of each downlink component carrier to be greater than or equal to what is required by the LTE Rel-8 terminal The size of the dynamic PUCCH resource, so that the dynamic PUCCH resource required by the LTE Rel-8 terminal is located in the first sub-block of the downlink component carrier.

Among them, the size of the dynamic PUCCH resource corresponding to each sub-block is semi-statically configured by the high layer; the number of sub-blocks of each downlink component carrier can be statically configured by the high layer; it can also be semi-statically configured by the high layer, which can save more dynamic PUCCH resources are used for PUSCH transmission.

Step 402, each sub-block is arranged according to the downlink component carrier index interleaving mapping.

Step 403, on the basis of the above-mentioned dynamic PUCCH resource reservation and related configuration, according to the first CCE index n _{CCE corresponding to the PDCCH on the i+1th downlink component carrier, i} calculates the dynamic PUCCH corresponding to the i+1th downlink component carrier PUCCH resource index n _PUCCH,i .

The specific calculation formula is the formula (2) mentioned above:

n _{PUCCH, i} = n _{CCE, i} + (N _PUCCH + i×N ₁ ) (2)

Wherein, n _{PUCCH, i} is the dynamic PUCHH resource index corresponding to the i+1th downlink component carrier;

n _{CCE, i} is the first CCE index corresponding to the PDCCH on the i+1th downlink component carrier;

N _PUCCH is a semi-static configuration parameter configured by higher layers;

i is the downlink component carrier index;

N ₁ is the size of the dynamic PUCCH resource corresponding to the first sub-block of the i+1th downlink component carrier.

The derivation process of formula (2) has been described in detail above, so it will not be repeated here.

As can be seen from the above analysis, the method for dynamic PUCCH resource reservation and index mapping of the present invention can maintain compatibility with LTE Rel-8 terminals on the basis of being applicable to LTE-A terminals; and, when each downlink component carrier requires When the size of the dynamic PUCCH resource varies greatly, more dynamic PUCCH resources can be saved for PUSCH transmission.

The technical solution of the present invention is further described below through a specific embodiment.

Assuming that the number of downlink component carriers M=2, first divide the dynamic PUCCH resources required by the two downlink component carriers 1 and 2 into three sub-blocks; The first sub-block of downlink component carrier 1 is placed first, then the first sub-block of downlink component carrier 2 is placed, and then other sub-blocks of each downlink component carrier are placed alternately, as shown in FIG. 5 .

It should be noted that for LTE Rel-8 terminals, when the size of each sub-block is configured semi-statically, the size of the first sub-block of each downlink component carrier is configured to be greater than or equal to the dynamic PUCCH required by LTE Rel-8 terminals The size of the resources, so that the dynamic PUCCH resources required by the LTE Rel-8 terminal are all located in the first sub-block of the downlink component carrier.

Of course, it can be seen from the above description that this sub-block is also applicable to LTE-A terminals. This means: when the dynamic PUCCH resource required by some LTE-A terminals is located in the first sub-block of the downlink component carrier, the corresponding dynamic PUCCH resource index of the LTE-A terminal can be directly calculated by formula (2); In addition, not all the dynamic PUCCH resources required by LTE-A terminals are located in the first sub-block of the downlink component carrier in the actual process, that is, the dynamic PUCCH resources required by the LTE-A terminal can be located in the first sub-block of the downlink component carrier. In the second or third sub-block, in this case, the corresponding dynamic PUCCH resource index of the LTE-A terminal should be calculated by formula (1).

Assuming that the sizes of the first, second and third sub-blocks of downlink component carriers 1 and 2 are semi-statically configured to be 10, 15 and 20 respectively by the upper layers, then

N ₀ =0, N ₁ =10, N ₂ =10+15=25, N ₃ =10+15+20=45

A column of numbers on the right side of FIG. 5 indicates the accumulated dynamic PUCCH resource size of each sub-block.

Here, the size of the sub-block can be configured as different values according to actual needs.

Based on the above resource reservation and related configuration, dynamic PUCCH resource indexes corresponding to different downlink component carriers of different terminals can be obtained according to the present invention.

For an LTE Rel-8 terminal, if its PDCCH is on downlink component carrier 1, and the first CCE index of the corresponding PDCCH is 8, then 0=N ₀ <n _{PUCCH, 0} =8<N ₁ =10, which means The dynamic PUCCH resource is located in the first sub-block of the downlink component carrier 1, so, according to formula (2), the dynamic PUCCH resource index n _PUCCH,0 corresponding to the downlink component carrier 1 is:

n _{PUCCH, 0} = n _{CCE, 0} +0×N ₁ +N _PUCCH

= n _{CCE, 0} +N _PUCCH

=8+N _PUCCH

Wherein, the first CCE index corresponding to the PDCCH can be set according to actual needs.

It can be seen from the above formula that this formula is consistent with the index mapping relationship required by the LTE Rel-8 terminal, and it is only necessary to set different semi-static configuration parameters N _PUCCH according to actual needs.

The following further illustrates that the present invention is also applicable to LTE-A terminals in conjunction with the above specific embodiments.

For an LTE-A terminal, if its PDCCH is on downlink component carrier 1, and the first CCE index of the corresponding PDCCH is 30, then 25=N ₂ <n _{CCE, 0} =30<N ₃ =45, which means dynamic The PUCCH resource is located in the third sub-block of the downlink component carrier 1, so, according to formula (1), the dynamic PUCCH resource index n _PUCCH,0 corresponding to the downlink component carrier 1 is:

n _{PUCCH, 0} = (M-1-i)×N _p +i×N _p+1 +n _{CCE, 0} +N _PUCCH

=(2-1-0)×N ₂ +0×N ₃ +n _{CCE, 0} +N _PUCCH

=N ₂ +n _{CCE, 0} +N _PUCCH

=25+30+N _PUCCH =55+N _PUCCH

Furthermore, for an LTE-A terminal, if its PDCCH is on the downlink component carrier 2, and the first CCE index corresponding to the PDCCH is 12, then 10=N ₁ <n _{CCE, 1} =12<N ₂ =25, This indicates that the dynamic PUCCH resource is located in the second sub-block of the downlink component carrier 2, so, according to formula (1), the dynamic PUCCH resource index n _PUCCH,1 corresponding to the downlink component carrier 2 is:

n _PUCCH,1 = (M-1-i)×N _p +i×N _p+1 +n _CCE,1 +N _PUCCH

=(2-1-1)×N ₁ +1×N ₂ +n _{CCE, 1} +N _PUCCH

=N ₂ +n _{CCE, 1} +N _PUCCH

=25+12+N _PUCCH =37+N _PUCCH

From the above analysis, it can be seen that the method for dynamic PUCCH resource reservation and index mapping of the present invention can maintain compatibility with LTE Rel-8 terminals on the basis of being applicable to LTE-A terminals.

In order to realize the above method, the present invention accordingly provides a device for dynamic PUCCH resource reservation and index mapping, as shown in Figure 6, the device includes:

The sub-block configuration module 60 is configured to divide the dynamic PUCCH resources required by each downlink component carrier into a plurality of sub-blocks, and configure the size of the dynamic PUCCH resource corresponding to the first sub-block of each downlink component carrier to be greater than or equal to LTE Rel The size of the dynamic PUCCH resource required by the -8 terminal, so that all the dynamic PUCCH resources required by the LTE Rel-8 terminal are located in the first sub-block of the downlink component carrier;

A sub-block arrangement module 61, configured to arrange each sub-block according to the downlink component carrier index interleaving mapping; and

The dynamic PUCCH resource index calculation module 62 is used to calculate the i+1th downlink component carrier corresponding to the first control channel element CCE index _nCCE,i according to the i+1th downlink component carrier corresponding to the physical downlink control channel PDCCH The dynamic PUCCH resource index n _PUCCH,i , where i is the downlink component carrier index.

Wherein, the size of the dynamic PUCCH resource corresponding to the sub-block is a semi-static configuration.

Wherein, the number of sub-blocks is configured statically or semi-statically.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (7)

1. dynamic physical uplink control channel resources reserves the method with index-mapping, and it is characterized in that, the method comprises:

Dynamic physical uplink control channel PUCCH resource needed for each downlink component carrier is divided into multiple sub-block, and by the size configure of dynamic PUCCH resource corresponding for first of each downlink component carrier sub-block for being more than or equal to the size of the dynamic PUCCH resource needed for Long Term Evolution version-8LTE Rel-8 terminal, the dynamic PUCCH resource needed for LTE Rel-8 terminal to be positioned at first sub-block of downlink component carrier;

Each sub-block described is arranged according to downlink component carrier index interlace map;

Based on above-mentioned configuration, according to first control channel unit CCE index n of physical downlink control channel PDCCH corresponding on the i-th+1 downlink component carrier _{cCE, i}calculate the dynamic PUCCH resource index n that the i-th+1 downlink component carrier is corresponding _{pUCCH, i}, wherein, i is downlink component carrier index;

Wherein, when compatible LTE Rel-8 terminal, according to n _{pUCCH, i}=n _{cCE, i}+ (N _pUCCH+ i × N ₁) calculate dynamic PUCCH resource index n corresponding to the i-th+1 downlink component carrier _{pUCCH, i};

Wherein, n _{pUCCH, i}it is the dynamic PUCHH resource index that the i-th+1 downlink component carrier is corresponding;

N _{cCE, i}be first CCE index of corresponding PDCCH on the i-th+1 downlink component carrier;

N _pUCCHfor semi-static configuration parameter;

I is downlink component carrier index;

N ₁it is the size of dynamic PUCCH resource corresponding to first sub-block of the i-th+1 downlink component carrier.

2. dynamic physical uplink control channel resources according to claim 1 reserves the method with index-mapping, it is characterized in that, described formula n _{pUCCH, i}=n _{cCE, i}+ (N _pUCCH+ i × N ₁) obtain according to formula (b) derivation:

n _PUCCH,i=(M-i-1)×N _p+i×N _p+1+n _CCE,i+N _PUCCH（b）

Wherein, n _{pUCCH, i}it is the dynamic PUCCH resource index that the i-th+1 downlink component carrier is corresponding;

M is the number of downlink component carrier;

I is downlink component carrier index, value is 0,1 ..., M-1;

P is the sub-block index of the i-th+1 downlink component carrier;

N _pbe the size of dynamic PUCCH resource corresponding to front p sub-block of the i-th+1 downlink component carrier, wherein N ₀=0, and the selection of p meets N _p<n _{cCE, i}<N _p+1;

N _{cCE, i}be first CCE index of corresponding PDCCH on the i-th+1 downlink component carrier;

N _pUCCHfor semi-static configuration parameter.

3. dynamic physical uplink control channel resources according to claim 1 and 2 reserves the method with index-mapping, it is characterized in that, the size of the dynamic PUCCH resource that described sub-block is corresponding is semi-static configuration.

4. dynamic physical uplink control channel resources according to claim 3 reserves the method with index-mapping, it is characterized in that, the number of described sub-block is static configuration or semi-static configuration.

5. dynamic physical uplink control channel resources reserves the device with index-mapping, it is characterized in that, this device comprises:

Sub-block configuration module, for the dynamic PUCCH resource needed for each downlink component carrier is divided into multiple sub-block, and by the size configure of dynamic PUCCH resource corresponding for first of each downlink component carrier sub-block for being more than or equal to the size of the dynamic PUCCH resource needed for LTE Rel-8 terminal, the dynamic PUCCH resource needed for LTE Rel-8 terminal to be all positioned at first sub-block of downlink component carrier;

Sub-block arrangement module, for arranging each sub-block described according to downlink component carrier index interlace map; And

Dynamic PUCCH resource index calculation module, for first CCE index n according to physical downlink control channel PDCCH corresponding on the i-th+1 downlink component carrier _{cCE, i}calculate the dynamic PUCCH resource index n that the i-th+1 downlink component carrier is corresponding _{pUCCH, i}, wherein, i is downlink component carrier index;

Wherein, when compatible LTE Rel-8 terminal, according to n _{pUCCH, i}=n _{cCE, i}+ (N _pUCCH+ i × N ₁) calculate dynamic PUCCH resource index n corresponding to the i-th+1 downlink component carrier _{pUCCH, i};

Wherein, n _{pUCCH, i}it is the dynamic PUCHH resource index that the i-th+1 downlink component carrier is corresponding;

N _{cCE, i}be first CCE index of corresponding PDCCH on the i-th+1 downlink component carrier;

N _pUCCHfor semi-static configuration parameter;

I is downlink component carrier index;

N ₁it is the size of dynamic PUCCH resource corresponding to first sub-block of the i-th+1 downlink component carrier.

6. dynamic physical uplink control channel resources according to claim 5 reserves the device with index-mapping, it is characterized in that, the size of the dynamic PUCCH resource that described sub-block is corresponding is semi-static configuration.

7. dynamic physical uplink control channel resources according to claim 6 reserves the device with index-mapping, it is characterized in that, the number of described sub-block is static configuration or semi-static configuration.