CN102468934B - Uplink transmission data piece response message resource allocation methods and system - Google Patents

Abstract

The invention discloses a kind of resource allocation methods of uplink transmission data piece response message, when terminal sends more than one transmission block on a upstream components carrier wave, the response message of each described uplink transmission block is fed back respectively in base station on downlink component carrier corresponding to described upstream components carrier wave by PHICH. Adopt the present invention, send out transmission block multiple on UE time, the response message of multiple transmission blocks can be realized respectively and being sent by the mode of code division multiplexing, and also can realize respectively and sending by the method for grouping, thus the problem of having avoided the throughput of system bringing due to logic and operation to decline; In addition, the present invention also can reduce the detection computations amount of UE side to PHICH, and has the feature of forward and backward compatibility concurrently.

Description

Uplink transmission data block response information resource allocation method and system

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a method and a system for allocating uplink transmission data block response information resources.

Background

The rapid development of digital communication systems puts higher demands on the reliability of data communication, however, in a severe channel, especially in a high data rate or high speed mobile environment, multipath interference, doppler shift, etc. seriously affect the system performance. Therefore, effective error control techniques, especially hybrid automatic repeat request (HARQ) techniques, are the focus of research in the field of communications.

In the HARQ scheme, the code transmitted by the transmitting end not only can detect errors, but also has a certain error correction capability. After receiving the code word, the decoder at the receiving end firstly checks the error condition, and if the error condition is within the error correction capability of the code, the error correction is automatically carried out; if the errors are too many and exceed the error correction capability of the code, the errors can be detected, and the receiving end sends a judgment signal to the sending end through a feedback channel to request the sending end to resend the information. In an Orthogonal Frequency Division Multiplexing (OFDM) system, correct or incorrect transmission is indicated by correct/incorrect response (ACK/NACK) control signaling, and thus whether retransmission is required is determined.

In a third generation partnership project (3 GPP) -Long Term Evolution (LTE) frequency division multiplexing system, a downlink physical channel includes a physical control format indicator channel (pdcch), a physical downlink control channel (pdcch), and a physical hybrid automatic repeat request indicator channel (PHICH). The PHICH is used to transmit downlink ACK/NACK information as HARQ response information of a Physical Uplink Shared Channel (PUSCH).

Currently, in the uplink technology of the LTE system, a terminal supports at most one transport block, and thus, a corresponding PHICH channel only needs 1-bit HARQ Indicator (HI). When HI is 1, the correct confirmation information is indicated, and the base station correctly receives the PUSCH; when HI is 0, it indicates an erroneous acknowledgement information, and the base station does not correctly receive the PUSCH. The 1-bit HARQ indicator is mapped to a corresponding PHICH after being coded, modulated and spread.

Compared with the existing system, the Advanced international mobile telecommunications-Advanced (IMT-Advanced) system can realize higher data rate and larger system capacity, namely the peak rate can reach 1Gbit/s (bit/second) under the conditions of low-speed movement and hot spot coverage, and the peak rate can reach 100Mbit/s under the conditions of high-speed movement and wide-area coverage. To meet the requirements of ITU-Advanced, the evolution standard long term evolution-Advanced (LTE-a), which is LTE, is required to support a larger system bandwidth (up to 100MHz) and to be backward compatible with the existing standards of LTE. Therefore, a Carrier Aggregation (CA) technology that combines based on the existing LTE bandwidth to obtain a larger bandwidth becomes one of the key technologies in the LTE-a system, and by using the technology, the spectrum utilization rate of the IMT-Advanced system can be improved, the shortage of spectrum resources is alleviated, and spectrum resource optimization is realized.

In order to meet the requirement of the uplink transmission rate of the IMT-Advanced in the LTE-A system, the UE uplink transmission can support a plurality of transmission blocks. According to the present discussion, in the uplink of the LTE-a system, the UE can support simultaneous transmission of at most two transport blocks. Therefore, in the corresponding downlink PHICH channel, at least two pieces of response information of the UE need to be fed back. The current solution is to obtain a feedback signal by performing a logical and operation on the two response messages, and then send the feedback signal in a corresponding PHICH channel by using the existing LTE method.

In summary, the following technical problems exist in the prior art: since the feedback signal is obtained by logical and operation according to the response information of two transport blocks of the UE, the feedback signal after the logical and is NACK as long as the response information of one of the transport blocks is NACK, and thus the UE needs to retransmit both the transport blocks after receiving the NACK feedback signal, which affects the throughput performance of the uplink system.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a resource allocation method and system for response information of uplink transmission data blocks, which solve the problem of feedback of response information through a PHICH (physical hybrid automatic repeat request) channel when a plurality of transmission blocks are transmitted on UE (user equipment).

In order to solve the above technical problem, the present invention provides a resource allocation method for uplink transmission data block response information, where when a terminal sends more than one transmission block on an uplink component carrier, the method includes:

and the base station respectively feeds back the response information of each uplink transmission block on the downlink component carrier corresponding to the uplink component carrier through a physical hybrid automatic repeat request indicator channel (PHICH).

Further, the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier or one downlink carrier group;

wherein the downlink carrier group includes one or more downlink component carriers.

Further, the method specifically comprises the following steps:

step A1, the base station calculates the total number of currently available PHICH groups;

step A2, extracting the lowest Physical Resource Block (PRB) index information and the cyclic offset information of a demodulation reference signal (DMRS) when an uplink physical shared channel (PUSCH) is transmitted from the uplink authorization information;

step A3, calculating the PHICH grouping number for feeding back the response information;

step A4, calculating the spreading sequence number of the current PHICH group feedback response information.

Further, in the step a3, the PHICH packet number is calculated by the following formula

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},$

Wherein M is the number of the transmission blocks, Ci is a codeword number, i is 0,1_DMRSFor the cyclic offset information of the DMRS,is the mostThe low PRB index information is information for which,the total number of currently available PHICH groups; g, when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; g, when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

Further, in step a4, the spreading sequence number of the current PHICH group feedback response information is calculated by using the following formula:

wherein i is 0, 1.. M,modulating the size of the spreading factor of the symbol for the PHICH, and S when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; s when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

The invention also provides a resource allocation system of the uplink transmission data block response information, which is applied to the base station, and the system comprises:

a resource allocation module, configured to allocate, when it is known that a terminal sends more than one transport block on an uplink component carrier, a PHICH group corresponding to a downlink component carrier corresponding to the uplink component carrier for feeding back response information of the uplink transport block;

a response information feedback module, configured to respectively feed back response information of each uplink transport block through a corresponding PHICH group on the downlink component carrier allocated by the resource allocation module.

Further, the resource allocation module is configured to allocate a downlink component carrier or a downlink carrier group for feeding back the response information, where the downlink carrier group includes one or more downlink component carriers.

Further, the resource allocation module allocates the PHICH group for feeding back the response information specifically by:

step A1, calculating the total number of currently available PHICH groups;

step A2, extracting the lowest PRB index information and the cyclic offset information of DMRS when the uplink physical shared channel (PUSCH) is transmitted from the uplink authorization information;

step A3, calculating the PHICH grouping number for feeding back the response information;

step A4, calculating the spreading sequence number of the current PHICH group feedback response information.

Further, the resource allocation module calculates the PHICH packet number specifically using the following formula

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},$

Wherein M is the number of the transmission blocks, Ci is a codeword number, i is 0,1_DMRSFor the cyclic offset information of the DMRS,for the lowest PRB index information, the PRB index information,the total number of currently available PHICH groups; g, when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; g, when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

Further, the resource allocation module specifically adopts the following formula to calculate the spreading sequence number of the response information issued by the current PHICH group:

wherein i is 0, 1.. M,modulating the size of the spreading factor of the symbol for the PHICH, and S when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; s when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

Aiming at the problem of feedback of response messages when UE (user equipment) in LTE-A supports simultaneous transmission of two transmission blocks, the invention provides a new ACK/NACK feedback mechanism, under the mechanism, response information of more than 1 transmission block can be respectively transmitted in a code division multiplexing mode, and can also be respectively transmitted by a grouping method, thereby avoiding the problem of system throughput reduction caused by logic and operation, and simultaneously, the invention can reduce the detection calculation amount of PHICH on the UE side and has the characteristic of forward and backward compatibility.

Compared with the prior art, the invention transmits the downlink HARQ information by selecting the downlink carrier group which sends the PHICH, thereby solving the pending problem of how to feed back the PHICH channel response information on a plurality of downlink component carriers. In the preferred embodiment of the invention, HARQ response information of a plurality of uplink transport blocks can be carried only by sending PHICH data on one downlink carrier group, thereby ensuring the throughput performance of an uplink system. Compared with the method of respectively transmitting PHICH by adopting multi-component carriers, the method has the advantages that the multi-component carriers are discrete frequency bands, and the downlink carrier group is a large continuous frequency band formed by aggregating one or more component carriers, so that the frequency domain resources can be saved by transmitting PHICH by the downlink carrier group; meanwhile, the detection calculation amount of the PHICH on the UE side is also reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of allocating resources for transmitting data block response information in an uplink direction in an OFDM system according to an embodiment of the present invention.

Detailed Description

In order to better solve the technical problems in the prior art, the invention provides a resource allocation method of uplink transmission data block response information, which has the core idea that when a terminal sends more than one transmission block on a component carrier, each transmission block is fed back respectively; furthermore, the feedback can be performed by one PHICH group in a code division multiplexing mode, or can be performed by a plurality of PHICH groups respectively.

Based on the above thought, the present invention provides a resource allocation method for uplink transmission data block response information, which comprises:

when a terminal sends more than one transmission block on an uplink component carrier, a base station respectively feeds back response information of each uplink transmission block on a downlink component carrier corresponding to the uplink component carrier through a PHICH.

The base station feeds back the response information through a PHICH group corresponding to one downlink component carrier or one downlink carrier group;

wherein the downlink carrier group includes one or more downlink component carriers.

That is, the base station may feed back response information of the transport blocks using one PHICH group, or may feed back response information of the transport blocks using a plurality of PHICH groups, respectively. Specifically, the base station determines whether to perform feedback in a plurality of PHICH groups or to perform feedback in one PHICH group according to a form of response information feedback designated by a higher layer.

For the convenience of describing the present invention, the following detailed description will be made with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a schematic flowchart of a method for allocating uplink transmission data block response information resources according to an embodiment of the present invention, and as shown in fig. 1, the flowchart mainly includes the following steps:

step 110, the base station obtains the maximum transmission group number of the transmission block response information and the length of the spreading factor according to the system information;

step 120, the base station searches for the lowest index number of the PUSCH resource position and the DMRS cyclic offset in the corresponding uplink authorization information (downlink control information0, abbreviated as DCI0) according to the position transmitted on the PUSCH;

step 130, judging whether to perform packet transmission, if so, executing step 140, otherwise, executing step 150;

step 140, judging whether code division multiplexing is carried out, if so, executing step 160, otherwise, executing step 170;

step 150, the code division multiplexing enable is closed, and step 170 is executed;

step 160, the packet transmission enable is turned off, and the next step 170 is executed;

step 170, calculating the group number and the corresponding spreading code number of the transmission block response message, and ending the process.

Specifically, the operation process of the feedback of the uplink transport block response information in the embodiment of the present invention mainly includes the following steps:

step one, according to UL/DL (uplink/downlink) configuration information and Ng parameters provided by a high layer, calculating the total number of PHICH groups available for the current base station

Wherein,a total number of PHICH groups configured for the system that are available in the downlink carrier.

Extracting the index information of the lowest Physical Resource Block (PRB) and the cyclic offset information of a demodulation reference signal (DMRS) when the PUSCH is transmitted from the DCI 0;

step three, calculating the PHICH group number when the PHICH is issued by using the following formula (1)

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},i=\mathrm{0,1}...M---\left(1\right)$

Wherein M is the number of the transmission blocks transmitted by the user equipment, n_DMRSFor the corresponding value of the DMRS cyclic offset field in DCI0,is the lowest PRB index in PUSCH slot 1, Ci is the codeword number, C0 represents codeword 0, C1 represents codeword 1, C2 represents codeword 2, and so on.

Wherein n is_DMRSIs the value corresponding to the DMRS cyclic offset field in DCI0, and the cyclic offset value of the DMRS field in DCI0 and n_DMRSThe corresponding relationship of (1) is shown in the following table 1, in table 1, the left column is a binary number, the right is a decimal number,represents the cyclic offset information.

Table 1 cyclic offset values and n for DMRS field in DCI0_DMRSCorresponding relationship of

G_EnableIs a packet transmission enabling switch, if the response information of M transmission blocks is issued in different PHICH groups, G is_EnableIs 1, otherwise, G_EnableIs 0. Here, if packet transmission is enabled, the number of PHICH groups used must be greater than or equal to M, i.e., the number of M cannot be greater than the total number of PHICH groups.

If the transmission is carried out in the same PHICH group, the obtained grouping number of the corresponding UE is a value; if the packet is transmitted, the packet number of the UE has a plurality of values, and the value number is related to the maximum value M of i.

Step four, according to the length of the spread spectrum sequence provided by the system and the length of the spread spectrum sequence 1 and 2, calculating the number of the spread spectrum sequence when the response message is sent currently by using the following formula (2):

wherein, i is 0, 1.. M, the number of M can not be larger than the length of the spreading sequence;modulating the size of a spreading factor for the symbols for the PHICH; s_EnableIs a code division multiplexing enabling switch, if the response information of M transmission blocks is issued in the same PHICH group, S is_EnableIs 1, otherwise, S_EnableIs 0.

If issued in the same PHICH group, i.e. S_EnableWhen the value is equal to 0, thenThe corresponding value is only 1. In the invention, in order to reduce the probability of collision with PHICHs of other UEs, the same spreading sequence number is adopted when grouping transmission is carried out, namely, the PHICH groups are issued in different manners.

According to the scheme of the invention, under the condition that the packet transmission enabling switch and the code division multiplexing enabling switch are both closed, the response information resource selection of a single transmission block in LTE can be realized.

In addition, the invention is also applicable to the LTE-A carrier aggregation technology, and in the case of carrier aggregation, 1 carrier group can be adopted to issue PHICH information. The carrier group refers to a continuous carrier frequency band formed by aggregating one or more discrete component carriers, and once a downlink carrier is determined in an LTE-a system, the range of resource positions where PHICHs are issued is relatively determined. Here, the PHICH corresponding to the carrier group refers to a PHICH corresponding to a contiguous frequency band formed after aggregation of one or more component carriers. The selection of the specific carrier group and how to combine the downlink component carriers can be flexibly configured according to the high-level indication of the system.

The invention will be described in more detail below with reference to a number of application examples of the invention.

Application example 1

The uplink data of two transport blocks sent by the ue is taken as an example for explanation. In this example, the response information of two transport blocks is sent down in different PHICH groups, and the feedback process is specifically described as follows:

1. according to UL/DL configuration information and Ng parameters provided by a system high layer, the total number of PHICH groups available for the current base station is calculated

2. Extracting the lowest PRB index information and DMRS when PUSCH is transmitted from DCI0Cyclic offset information n of_DMRS。

3. And (3) calculating the total number of PHICH groups when the PHICH is issued by using a formula (1) according to the information provided by the formulas (1) and (2).

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},i=\mathrm{0,1}...M---\left(1\right)$

Two transport blocks are issued in different PHICH groups, G_EnableIs 1. C0 is 0, C1 is 1, and the packet numbers of two response message transmissions can be obtained separately, instead of the formula (1) calculation. Or C0 is 1, C1 is 0, and the packet numbers of two response message transmissions can be obtained separately, instead of the formula (1) calculation. Here, the values of C0 and C1 are not limited to 0 and 1, and may be other values (when other values are used, the packet number is offset from the result when 0 or 1 is used, but both values are in the PHICH group defined by the system).

4. Spreading sequence length provided according to 1 and 2 and systemCalculating the number of the spreading sequence when the current PHICH group sends a response message by using a formula (2)

As the corresponding response information of the two transmission blocks is sent in different PHICH groups, at the moment, S_EnableIs 0.

Application example two

The uplink data of two transport blocks sent by the ue is taken as an example for explanation. In this example, the response information of two transport blocks is sent down in the same PHICH group, which is specifically described as follows:

1. according to UL/DL configuration information and Ng parameters provided by a system high layer, the total number of PHICH groups available for the current base station is calculated

2. And extracting the lowest PRB index information and the cyclic offset information of the DMRS when the PUSCH is transmitted from the DCI 0.

3. And (3) calculating the total number of PHICH groups when the PHICH is issued by using a formula (1) according to the information provided by the formulas (1) and (2).

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},i=\mathrm{0,1}...M---\left(1\right)$

Two transport blocks are issued in the same PHICH group, at this time, G_EnableIs 0.

4. Spreading factor length provided according to 1 and 2 and systemCalculating the number of the spreading sequence when the current PHICH group sends a response message by using a formula (2)

As the corresponding response information of the two transmission blocks is transmitted in the same PHICH group, at this time, S_EnableIs 1. C0 is 0, C1 is 1, and the spreading sequence numbers of two response information transmissions can be obtained by substituting formula (2) for calculation. Or C0 is 1, C1 is 0, and the spreading sequence numbers of two response information transmissions can be respectively obtained by calculation in formula (2). Here, the values of C0 and C1 are not limited to 0 and 1, and may be other values.

Application example three

In this example, the number of transport blocks of the ue is taken as M, and the process of sending the response information is described as follows.

1. According to UL/DL configuration information and Ng parameters provided by a system high layer, the total number of PHICH groups available for the current base station is calculated

2. And extracting the lowest PRB index information and the cyclic offset information of the DMRS when the PUSCH is transmitted from the DCI 0.

3. And according to the information provided by 1 and 2, calculating the total number of PHICH groups when the PHICH is issued.

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},i=\mathrm{0,1}...M---\left(1\right)$

G if the response information of M transport blocks is transmitted in different PHICH groups_EnableIs 1, otherwise, G_EnableIs 0.

When response information in M transport blocks is issued in different PHICH groupsThe value of M is required to be equal to or less than

4. Spreading factor length provided according to 1 and 2 and systemCalculating the serial number of the spread spectrum sequence when the current PHICH group sends response information

If the response information of M transport blocks is issued in the same PHICH group, S_EnableIs 1, otherwise, S_EnableIs 0.

When response information of M transport blocks is transmitted in the same PHICH group, the value of M is required to be less than or equal to

In addition, an embodiment of the present invention further provides a system for allocating uplink transmission data block response information resources, which is applied to a base station, and the system includes:

a resource allocation module, configured to allocate, when it is known that a terminal sends more than one transport block on an uplink component carrier, a PHICH group corresponding to a downlink component carrier corresponding to the uplink component carrier for feeding back response information of the uplink transport block;

a response information feedback module, configured to respectively feed back response information of each uplink transport block through a corresponding PHICH group on the downlink component carrier allocated by the resource allocation module.

Further, the resource allocation module is configured to allocate a downlink component carrier or a downlink carrier group for feeding back the response information, where the downlink carrier group includes one or more downlink component carriers.

Further, the resource allocation module allocates the PHICH group for feeding back the response information specifically by:

step A1, calculating the total number of currently available PHICH groups;

step A2, extracting the lowest PRB index information and the cyclic offset information of DMRS when the uplink physical shared channel (PUSCH) is transmitted from the uplink authorization information;

step A3, calculating the PHICH grouping number for feeding back the response information;

step A4, calculating the spreading sequence number of the current PHICH group feedback response information.

Further, the resource allocation module calculates the PHICH packet number specifically using the following formula

$n_{\mathrm{PHICH}}^{\mathrm{group}}=(I_{\mathrm{PRB}}^{\mathrm{lowest}}+n_{\mathrm{DMRS}}+G_{\mathrm{Enable}}\·\mathrm{Ci})\mathrm{mod}{N}_{\mathrm{PHICH}}^{\mathrm{group}}+I_{\mathrm{PHICH}}\·N_{\mathrm{PHICH}}^{\mathrm{group}},$

Wherein M is the number of the transmission blocks, Ci is a codeword number, i is 0,1_DMRSFor the cyclic offset information of the DMRS,for the lowest PRB index information, the PRB index information,the total number of currently available PHICH groups; g, when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; g, when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

Further, the resource allocation module specifically adopts the following formula to calculate the spreading sequence number of the response information issued by the current PHICH group:

wherein i is 0, 1.. M,modulating the size of the spreading factor of the symbol for the PHICH, and S when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; s when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

Claims (4)

1. A resource allocation method for uplink transmission data block response information is characterized in that when a terminal sends more than one transmission data block on one uplink component carrier, the method comprises the following steps:

the base station respectively feeds back response information of each uplink transmission data block on a downlink component carrier corresponding to the uplink component carrier through a physical hybrid automatic repeat request indicator channel PHICH;

the method specifically comprises the following steps:

the base station calculates the total number of currently available PHICH groups;

extracting the lowest Physical Resource Block (PRB) index information and the cyclic offset information of a demodulation reference signal (DMRS) when a Physical Uplink Shared Channel (PUSCH) is transmitted from uplink authorization information;

calculating a PHICH grouping number for feeding back the response information;

calculating the serial number of a spread spectrum sequence of the current PHICH group feedback response information;

wherein,

calculating the PHICH packet number using the following formula

$n_{PHICH}^{group}=(I_{PRB}^{lowest}+n_{DMRS}+G_{Enable}\·Ci)\mathrm{mod}{N}_{PHICH}^{group}+I_{PHICH}\·N_{PHICH}^{group},$

Wherein M is the number of the transmission data blocks, Ci is the code word number, i is 0,1, …, M, n_DMRSFor the cyclic offset information of the DMRS,for the lowest PRB index information, the PRB index information,the total number of currently available PHICH groups; g, when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; g, when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable1 is ═ 1; when TDD UL/DL is configured to 0, if PUSCH is sent on subframe 4 or 9, I_PHICH1, otherwise I_PHICH＝0；

Calculating the number of the spreading sequence of the current PHICH group feedback response information by adopting the following formula:

wherein, i is 0,1, …, M,is at pHThe size of the ICH modulation symbol spreading factor, when the base station feeds back the response information through a PHICH group corresponding to a downlink component carrier, S_Enable0; s when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

2. The method of claim 1,

the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier or one downlink carrier group;

wherein the downlink carrier group includes a plurality of downlink component carriers.

3. A resource allocation system for uplink transmission of data block response information, which is applied to a base station, the system comprising:

a resource allocation module, configured to allocate, when it is known that a terminal sends more than one transmission data block on an uplink component carrier, a PHICH group corresponding to a downlink component carrier corresponding to the uplink component carrier for feeding back response information of the transmission data block;

a response information feedback module, configured to respectively feed back response information of each uplink transmission data block through a corresponding PHICH group on the downlink component carrier allocated by the resource allocation module;

the resource allocation module allocates the PHICH group for feeding back the response information specifically by:

calculating the total number of currently available PHICH groups;

extracting the lowest PRB index information and the cyclic offset information of the DMRS when the physical uplink shared channel PUSCH is transmitted from the uplink authorization information;

calculating a PHICH grouping number for feeding back the response information;

calculating the serial number of a spread spectrum sequence of the current PHICH group feedback response information;

wherein,

the resource allocation module calculates the PHICH packet number by using the following formula

$n_{PHICH}^{group}=(I_{PRB}^{lowest}+n_{DMRS}+G_{Enable}\·Ci)\mathrm{mod}{N}_{PHICH}^{group}+I_{PHICH}\·N_{PHICH}^{group},$

Wherein M is the number of the transmission data blocks, Ci is the code word number, i is 0,1, …, M, n_DMRSFor the cyclic offset information of the DMRS,for the lowest PRB index information, the PRB index information,the total number of currently available PHICH groups; g, when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; g, when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable1 is ═ 1; when TDD UL/DL is configured to 0, if PUSCH is sent on subframe 4 or 9, I_PHICH1, otherwise I_PHICH＝0；

The resource allocation module specifically adopts the following formula to calculate the spreading sequence number of the response information issued by the current PHICH group:

wherein, i is 0,1, …, M,modulating the size of the spreading factor of the symbol for the PHICH, and S when the base station feeds back the response information through a PHICH group corresponding to one downlink component carrier_Enable0; s when the base station feeds back the response information through PHICH groups corresponding to a plurality of downlink component carriers_Enable＝1。

4. The system of claim 3,

the resource allocation module is configured to allocate a downlink component carrier or a downlink carrier group for feeding back the response information, where the downlink carrier group includes multiple downlink component carriers.