CN102056228A - Uplink hybrid automatic repeat request response information and indication bond transmission method and base station - Google Patents

Abstract

The present invention discloses an uplink HARQ response information bundling instruction transmission method, comprising: determining the PHICH resource corresponding to the uplink transmission block according to the scheduling information of each uplink transmission block; and determining the PHICH resources corresponding to multiple uplink transmission blocks The PHICH resources are the same (that is, the PHICH resources corresponding to multiple uplink transport blocks are allowed to collide), then the multiple HARQ response information corresponding to the multiple uplink transport blocks are bundled to generate a single uplink HARQ response information , and send the generated single uplink HARQ response information in the PHICH resource. The method may further include the step of sending PDCCH uplink allocation information indicating retransmission of wrongly transmitted uplink transport blocks, so as to solve the possible misunderstanding problem involved in the above-mentioned PHICH resource collision. The present invention solves the problem of how to ensure the normal operation of the HARQ mechanism when the PHICH resources corresponding to multiple uplink transmission blocks are the same, and ensures the backward compatibility with LTE version 8.

Description

Uplink hybrid automatic retransmission response information bundling instruction transmission method and base station

technical field

The present invention relates to the communication field, in particular to the physical hybrid automatic request retransmission technology in the LTE-Advanced system and 4G system using carrier aggregation technology and/or uplink MIMO technology. According to the present invention, an uplink hybrid automatic request is proposed Retransmission HARQ (Hybrid Automatic Repeat reQuest) response information bundling indication transmission method and base station, wherein a single, bundled HARQ response information is transmitted in a Physical Hybrid Automatic Repeat reQuest indicator channel PHICH (Physical Hybrid ARQ Indicator CHannel).

Background technique

As an effective error control technology, Hybrid Automatic Repeat Request (HARQ) technology is a research hotspot in the communication field. In the HARQ mode, the code sent by the sending end can not only detect errors, but also have certain error correction capabilities. After receiving the codeword, the decoder at the receiving end first checks the error situation, and if it is within the error correction capability of the code, it will automatically correct the error; if there are many errors that exceed the error correction capability of the code, but can be detected, then The receiving end sends a decision signal to the sending end through the feedback channel, requesting the sending end to resend the information. In the Orthogonal Frequency Division Multiplexing (OFDM) system, the correct answer/wrong answer ACK/KACK (Acknowledgment/Negative Acknowledgment) control signaling is used to indicate whether the transmission is correct or wrong, and to judge whether retransmission is required .

和PHICH组中正交序列的索引

确定PHICH资源，其中

和通过上行传输块的第一个资源块RB(Resource Block)的索引和解调参考信号DMRS(DeModulation Reference Signal)的循环移位CS(Cyclic Shift)值来确定。In the 3rd Generation Partnership Project 3GPP ( ^3rd Generation Partnership Project) Long Term Evolution Project LTE (Long Term Evolution) system, the HARQ response information ACK/KACK of the physical uplink shared channel PUSCH (Physical Uplink Shared CHannel) transport block The transmission is carried out in the PHICH of the channel. In the uplink transmission of the LTE system, the user equipment UE (User Equipment) supports at most one transport block, so the corresponding PHICH channel only needs a 1-bit HARQ indicator HI (HARQ Indicator). In LTE, when HI=1, it means correct acknowledgment (ACK), and the base station eNB correctly received PUSCH; when HI=0, it means wrong acknowledgment (NACK), and eNB did not receive PUSCH correctly. The 1-bit HI is mapped to the corresponding PHICH resource after encoding, modulation, and spectrum spreading. The process of mapping to PHICH resources includes the group number of UE and eNB according to PHICH

and the index of the orthogonal sequence in the PHICH set

Identify PHICH resources where

and It is determined by the index of the first resource block RB (Resource Block) of the uplink transmission block and the cyclic shift CS (Cyclic Shift) value of the demodulation reference signal DMRS (DeModulation Reference Signal).

和PHICH组中正交序列的索引

相同时，这些传输块所对应的PHICH物理资源相同，即发生了PHICH资源碰撞。As an evolution standard of the LTE system, the LTE-Advanced system can support multiple component carriers for uplink transmission in order to meet the uplink transmission rate requirements of IMT-Advanced, and the design of the corresponding PHICH needs to be re-studied. The current discussion results decide to reuse the PHICH physical transmission mode in LTE Release 8, including the design of orthogonal codes, modulation, scrambling codes, and RE (Resource Element) mapping methods. At the same time, the PHICH will be transmitted on the downlink component carrier that transmits the uplink allocation information (UL grant). For scenarios where the number of downlink component carriers is equal to or greater than the number of uplink component carriers and the carrier indicator field (CIF (Carrier Indicator Field) is not used), the PHICH resource mapping method can reuse the method described above in LTE Release 8; for the number of downlink component carriers less than In the scenario of the number of uplink component carriers, since the carrier indicator field CIF is used, there is a problem of "PHICH resource collision" (PHICH collision) in the PHICH resource mapping at this time, that is, when multiple components scheduled by the same downlink component carrier are distributed on different uplink component When the index of the first resource block of the uplink transmission block in the carrier is the same as the cyclic shift value of the demodulation reference signal, or due to some special values of these parameters, the group number of the PHICH

and the index of the orthogonal sequence in the PHICH set

When they are the same, the PHICH physical resources corresponding to these transport blocks are the same, that is, a PHICH resource collision occurs.

Aiming at the problem of PHICH resource collision, many literatures proposed solutions respectively.

Ericsson believes that this problem can be solved by scheduling (R1-094272, PHICH for Carrier Aggregation, Ericsson, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16, 2009), that is, the base station scheduler ensures that the uplink transmission block does not Use the same index of the first resource block and/or cyclic shift value of the demodulation reference signal. The disadvantage of this scheme lies in the scheduling limitation and scheduling complexity it brings.

Samsung proposed to use the PHICH resource offset value related to the semi-static configuration of the uplink component carrier to make the uplink transmission block have a different index of the first resource block, so as to have different PHICH resources (R1-094080, PHICH Mapping in Asymmetric CarrierAggregation, Samsung, 3GPP RAN1#58bis, Miyazaki, Japan, Oct. 12-16, 2009). The disadvantage is that this solution may potentially cause the LTE-Advanced system to require more PHICH resources than the LTE Release 8 system, thus affecting the backward compatibility of the LTE-Advanced system.

Qualcomm proposed that system-level uplink resource block renumbering can be used to solve this problem (R1-094205, PHICH for Multicarrier Operation, Qualcomm Europe, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16, 2009), which The defective of a method is the same with the scheme proposed by Samsung above.

Alcatel proposed to use the control channel element CCE (Control Channel Element) in the physical downlink control channel PDCCH (Physical Downlink Control CHannel) to store more PHICH resources required by the LTE-Advanced system than the LTE version 8 system (R1-093766, PHICH for Multicarrier Operation, Alcatel-Lucent, Alcatel-Lucent Shanghai Bell, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16, 2009). This method can maintain compatibility with the LTE Release 8 system on the basis of increasing PHICH resources, but requires more standardization work.

It should be noted that, in addition to PHICH resource collisions in the carrier aggregation scenario, when the LTE-Advanced system adopts uplink MIMO technology, since multiple uplink transmission blocks correspond to the same time-frequency physical resources, PHICH resource collisions may also occur , so when considering the PHICH resource collision solution, it is sometimes necessary to consider carrier aggregation and uplink MIMO together.

The present invention proposes a new solution to the problem of PHICH resource collision. On the basis of conforming to the spirit of the current conference decision, it realizes transparent processing of uplink and downlink carrier asymmetry, pairing mode and adopted MIMO technology, that is, user equipment There is no need to distinguish whether it is in a symmetric or asymmetric carrier aggregation scenario, nor does it need to distinguish which uplink MIMO technology is used. This solution does not require more PHICH resources than the LTE Release 8 system, does not have any scheduling limitations, and has a small standardization workload.

Contents of the invention

The technical problem to be solved by the present invention is to propose an uplink HARQ response information bundling instruction transmission method and a base station to solve the PHICH resource collision problem generated when the LTE-Advanced system adopts carrier aggregation and/or uplink MIMO technology.

According to the first solution of the present invention, a HARQ response information bundling indication transmission method is proposed, including: determining the physical HARQ corresponding to the uplink transmission block according to the scheduling information of each uplink transmission block retransmitting the indicator channel PHICH resources; and if it is determined that the PHICH resources corresponding to the multiple uplink transport blocks are the same, performing bundling processing on multiple HARQ response information corresponding to the multiple uplink transport blocks to generate a single uplink HARQ response information, and send the generated single uplink HARQ response information in the PHICH resource.

Preferably, the uplink HARQ response information bundling instruction transmission method may further include: when the multiple uplink transmission blocks include at least one successful uplink transmission block, for each failed transmission in the multiple uplink transmission blocks The user equipment corresponding to an uplink transmission block may send physical downlink control channel PDCCH uplink allocation information indicating retransmission of the uplink transmission block.

More preferably, the uplink HARQ response information bundling instruction transmission method may further include: when at least one successfully transmitted uplink transmission block is included in the multiple uplink transmission blocks, for the successful transmission in the multiple uplink transmission blocks For the user equipment corresponding to each uplink transmission block, the base station decides whether to send PDCCH uplink allocation information indicating the transmission of a new uplink transmission block.

More preferably, when the multiple uplink transmission blocks fail to be transmitted, the PDCCH uplink allocation information may not be sent.

Wherein, when the multiple uplink HARQ response information corresponding to the multiple uplink transport blocks are all HARQ error response NACK, the bundling process generates a single HARQ NACK, otherwise, the bundling process generates a single HARQ positive response ACK.

Preferably, the uplink HARQ response information bundling instruction transmission method may further include: when the multiple uplink transmission blocks have been successfully transmitted, for each of the multiple uplink transmission blocks corresponding to the successful transmission The user equipment, the base station decides whether to send the physical downlink control channel PDCCH uplink allocation information indicating the transmission of a new uplink transport block.

More preferably, the method for transmitting the uplink HARQ response information bundling indication may further include: when the multiple uplink transport blocks include at least one failed uplink transport block, for each of the multiple uplink transport blocks The user equipment corresponding to the uplink transmission block may send PDCCH uplink allocation information indicating retransmission of the uplink transmission block.

More preferably, when the multiple uplink transport blocks include at least one uplink transport block whose transmission fails, the PDCCH uplink allocation information may not be sent.

Wherein, when the multiple uplink HARQ response information corresponding to the multiple uplink transport blocks are all HARQ correct response ACKs, the bundling process generates a single HARQ ACK, otherwise, the bundling process generates a single HARQ error response NACK.

According to the second solution of the present invention, a base station is proposed, including: a resource collision detection unit, configured to determine the physical hybrid automatic retransmission indication channel corresponding to the uplink transmission block according to the scheduling information of each uplink transmission block PHICH resources, and detect whether the PHICH resources corresponding to the multiple uplink transmission blocks are the same; and a bundling processing unit, configured to pair the PHICH resources corresponding to the multiple uplink transmission blocks when the resource collision detection unit determines that the PHICH resources corresponding to the multiple uplink transmission blocks are the same Multiple uplink HARQ response information corresponding to multiple uplink transport blocks are bundled to generate single uplink HARQ response information, and the generated single uplink HARQ response information is sent in the PHICH resource.

Preferably, the base station may further include: a new transmission/retransmission scheduling unit, configured to, when at least one successful uplink transmission block is included in the plurality of uplink transmission blocks, for transmission in the plurality of uplink transmission blocks The user equipment corresponding to each failed uplink transmission block sends physical downlink control channel PDCCH uplink allocation information indicating retransmission of the uplink transmission block.

More preferably, the new transmission/retransmission scheduling unit is further configured to, when at least one successfully transmitted uplink transmission block is included in the multiple uplink transmission blocks, for each successful transmission in the multiple uplink transmission blocks For the user equipment corresponding to an uplink transport block, the base station decides whether to send PDCCH uplink allocation information indicating the transmission of a new uplink transport block.

More preferably, the new transmission/retransmission scheduling unit is further configured not to send PDCCH uplink allocation information when the multiple uplink transmission blocks fail to be transmitted.

Wherein, when the plurality of uplink HARQ response information corresponding to the plurality of uplink transport blocks are all HARQ error response NACK, the bundling processing unit generates a single HARQ NACK; otherwise, the bundling processing unit generates a single HARQ acknowledgment Response ACK.

Preferably, the base station may further include: a new transmission/retransmission scheduling unit, configured to, when all the multiple uplink transmission blocks have been successfully transmitted, for each successful uplink transmission among the multiple uplink transmission blocks For the user equipment corresponding to the block, the base station decides whether to send the physical downlink control channel PDCCH uplink allocation information indicating the transmission of a new uplink transmission block.

More preferably, the new transmission/retransmission scheduling unit is further configured to, when the multiple uplink transmission blocks include at least one uplink transmission block that fails to be transmitted, for each of the multiple uplink transmission blocks The user equipment corresponding to the transport block sends PDCCH uplink allocation information indicating retransmission of the uplink transport block.

More preferably, the new transmission/retransmission scheduling unit is further configured to not send PDCCH uplink allocation information when the multiple uplink transmission blocks include at least one uplink transmission block whose transmission fails.

Wherein, when the plurality of HARQ response information corresponding to the plurality of uplink transmission blocks are all HARQ correct response ACKs, the bundling processing unit generates a single HARQ ACK, otherwise, the bundling processing unit generates a single HARQ error Answer NACK.

Description of drawings

The above-mentioned and other purposes, features and advantages of the present invention will be made clearer by illustrating preferred embodiments of the present invention in conjunction with the accompanying drawings below, wherein:

Fig. 1 shows a flow chart of a method for transmitting an uplink HARQ response information bundling instruction according to the present invention;

FIG. 2 shows a schematic diagram of using the same PHICH resource for uplink transmission blocks that collide with PHICH resources;

FIG. 3 shows a schematic diagram of a method for transmitting an uplink HARQ response information bundling indication when uplink transmission involves MIMO technology;

FIG. 4 shows another schematic diagram of the uplink HARQ response information bundling instruction transmission method when the uplink transmission involves MIMO technology;

FIG. 5 shows another schematic diagram of the uplink HARQ response information bundling indication transmission method when the uplink transmission involves MIMO technology; and

Fig. 6 shows a schematic structural block diagram of a base station according to the present invention.

Detailed ways

In order to clearly describe the implementation steps of the present invention in detail, some specific embodiments of the present invention are given below, which are applicable to wireless communication systems supporting carrier frequency aggregation technology and/or uplink MIMO technology, especially LTE-Advanced cellular mobile communication systems . It should be noted that the present invention is not limited to these applications, but is applicable to more other related wireless communication systems.

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to avoid confusing the understanding of the present invention.

Aiming at the problem of PHICH resource collision that may exist during the transmission of HARQ response information in the physical hybrid automatic retransmission indicator channel PHICH, the present invention proposes a method for transmitting uplink HARQ response information bundling instructions. Figure 1 shows the uplink transmission method of the present invention The flowchart of the HARQ response information bundling instruction transmission method, as shown in Figure 1, the uplink HARQ response information bundling instruction transmission method of the present invention may include the following steps:

Step 101: the base station determines the corresponding PHICH resource according to the scheduling information of the uplink transport block;

Step 102: the base station detects whether there is a PHICH resource collision;

Step 103: If the base station detects that the PHICH resources corresponding to the multiple uplink transport blocks are the same (PHICH resource collision occurs, step 102: Yes), then process the multiple uplink HARQ response information corresponding to the multiple uplink transport blocks The generated uplink HARQ response information is sent in the PHICH resource;

Step 104: When the one HARQ response information is a correct response ACK, the base station sends a physical downlink control instruction to retransmit the transport block for each of the one or more transport blocks that fail to be transmitted in the above multiple uplink transport blocks Channel PDCCH uplink allocation information.

Step 110: If the base station does not detect a PHICH resource collision (step 102: No), the base station will use the original transmission method of the uplink HARQ response information in the PHICH in LTE Release 8.

According to the provisions of LTE release 8, the user equipment can jointly decide its subsequent behavior (transmission block with adaptive retransmission failure, transmission with non-adaptive retransmission failure) according to the received uplink HARQ response information and PDCCH uplink allocation information. block, transfer a new transfer block, or no operation).

Next, the above-mentioned uplink HARQ response information bundling indication transmission method will be specifically described.

和PHICH组中正交序列的索引

于是造成PHICH资源的碰撞问题。在本发明的实施方法中，允许这样的PHICH资源碰撞出现，即两个及以上的上行传输块可以按照LTE版本8的规则(TS 36.213 V8.7.0，“Evolved Universal Terrestrial RadioAccess(E-UTRA)；Physical layer procedures”)对应到相同的PHICH资源。如果未来的后续LTE版本另外加入一些其他的参数以共同确定PHICH资源，本发明同样可以应用于符合这些未来的后续LTE版本的系统中所出现的PHICH资源碰撞问题。FIG. 2 shows a schematic diagram of using the same PHICH resource for uplink transmission blocks that collide with PHICH resources. As shown in Figure 2, since the 3GPP meeting currently agrees to use the carrier indication field CIF, the PDCCH on the downlink component carrier 0 can be used to indicate the corresponding uplink component carrier of the carrier (downlink component carrier 0) according to the LTE release 8 rules The allocation information of the PUSCH on 0 can also be used to indicate the allocation information of the PUSCH on the uplink component carrier 1 different from the uplink component carrier 0. In Figure 2, there are only two uplink component carriers, and each uplink component carrier has an uplink Transport block as an example, in fact, it can also include a variety of application scenarios, for example, there can be multiple uplink component carriers; and there can also be multiple uplink transport blocks on each component carrier, but for the sake of simplicity and clarity, the following The description will be made with reference to FIG. 2 , and those skilled in the art can clearly understand the specific implementation manner of the present invention in more complex application scenarios based on the description of FIG. 2 . In actual communication, the uplink allocation information UL grant0 and UL grant1 on the downlink component carrier 0 of the Nth subframe respectively indicate the uplink PUSCH transmission (PUSCH0 and PUSCH1) on component carrier 0 and uplink component carrier 1. In the N+n+k subframe (k is determined by the time relationship between the scheduled PUSCH transmission and the corresponding PHICH resource), since the current 3GPP meeting agrees that the PHICH will be transmitted on the downlink component carrier that transmits the uplink allocation information, the above The PHICHs corresponding to PUSCH0 and PUSCH1 will be transmitted on the same downlink component carrier, that is, downlink component carrier 0. According to the regulations of LTE Release 8, the base station determines the corresponding PHICH resource according to the scheduling information of the uplink transmission block, which includes the index of the first resource block of the uplink transmission block and the cyclic shift value of the demodulation reference signal, so When the index of the first resource block and the cyclic shift value of the demodulation reference signal of the transport blocks corresponding to the above PUSCH0 and PUSCH1 are the same, these transport blocks will correspond to the same PHICH group number

and the index of the orthogonal sequence in the PHICH set

This results in a collision problem of PHICH resources. In the implementation method of the present invention, such PHICH resource collision is allowed to occur, that is, two or more uplink transport blocks can follow the rules of LTE Release 8 (TS 36.213 V8.7.0, "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures") correspond to the same PHICH resources. If future subsequent LTE versions add some other parameters to jointly determine PHICH resources, the present invention can also be applied to the PHICH resource collision problem that occurs in systems conforming to these future subsequent LTE versions.

In the above-mentioned one PHICH resource corresponding to multiple uplink transport blocks, the uplink HARQ response information transmitted by the base station may be the processing result of multiple uplink HARQ response information corresponding to the above-mentioned multiple uplink transport blocks according to the method shown in Table 1-1 (step 103). Note that two transmission blocks are used as an example in Table 1-1. When there are more than two uplink transmission blocks, the processing method can be deduced in the same way.

Table 1-1

Scenes Response of PUSCH0 Response to PUSCH1 Result of bundle processing 1 ACK ACK ACK 2 ACK NACK ACK 3 NACK ACK ACK 4 NACK NACK NACK

It can be seen from Table 1-1 that the processing method of the uplink HARQ response information here is a bundling method, that is, multiple uplink HARQ response information corresponding to multiple uplink transmission blocks are processed to generate The principle of processing an uplink HARQ response information is that unless the uplink HARQ response information of all uplink transmission blocks is NACK, and the processing result is to generate a NACK response information, otherwise an ACK response information will be generated. The physical processing process of ACK/NACK response information transmission in the PHICH resource, including coding, modulation, scrambling, spreading and other operations, is similar to that of LTE version 8 (TS 36.211 V8. ; Physical Channels and Modulation", TS 36.212 V8.7.0, "Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding") The same as specified in.

As mentioned above, since multiple uplink transport blocks correspond to the same PHICH resource, using the uplink HARQ response information bundling processing method in Table 1-1 to transmit the same HARQ response information for the multiple uplink transport blocks will cause errors. The user equipment of the uplink transport block may still receive the acknowledgment information about the correct transmission of this transport block, causing misunderstanding. This problem will be solved through the subsequent base station processing, that is, when the bundled uplink HARQ response information is ACK, the base station fails to transmit the bundled uplink HARQ response information (that is, the response corresponding to the uplink transport block For an uplink transport block whose information is NACK), send PDCCH uplink allocation information indicating retransmission of the uplink transport block to perform adaptive retransmission. The format of these PDCCH uplink allocation information can reuse the downlink control information DCI (Downlink Control Information) of LTE version 8 (TS 36.212 V8.7.0, "Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channelcoding"), and its function is to realize Adaptive retransmission of failed uplink transport blocks. For the situation where the bundled uplink HARQ response information is NACK, since there is no misunderstanding at this time, the multiple uplink transmission blocks corresponding to the bundled uplink HARQ response information will use non-adaptive retransmission according to the regulations of LTE release 8 .

The above PDCCH uplink allocation information will cause a certain increase in downlink control channel overhead. To reduce this overhead, you can consider using the scheduling solution proposed by Ericsson (R1-094272, PHICH for Carrier Aggregation, Ericsson, 3GPP RAN1#58bis, Miyazaki , Japan, Oct.12-16, 2009), that is, the base station scheduler ensures that the uplink transmission blocks do not use the same index of the first resource block and/or cyclic shift value of the demodulation reference signal. In this way, the problem of PHICH resource collision can be partially solved by carefully allocating the index of the first resource block of the uplink transmission block and/or the cyclic shift value of the demodulation reference signal during scheduling by the base station. When this method cannot completely solve the PHICH When dealing with the problem of resource collision, the method provided by the present invention can be used as a beneficial supplement.

In the above-mentioned one PHICH resource corresponding to multiple uplink transport blocks, the uplink HARQ response information transmitted by the base station may also be the processing of multiple uplink HARQ response information corresponding to the above-mentioned multiple uplink transport blocks according to the method shown in Table 1-2 Results (step 103). Note that two transmission blocks are used as an example in Table 1-2. When there are more than two uplink transmission blocks, the processing method can be deduced in the same way.

Table 1-2

Scenes Response of PUSCH0 Response to PUSCH1 Result of bundle processing 1 ACK ACK ACK 2 ACK NACK NACK 3 NACK ACK NACK 4 NACK NACK NACK

As shown in Table 1-2, the processing method of multiple uplink HARQ response information corresponding to multiple uplink transmission blocks can also be implemented by using another bundling method. The principle of processing is that unless the uplink HARQ response information of all uplink transmission blocks The information is all ACK, and the processing result at this time is to generate an ACK response message, otherwise a NACK response message will be generated.

As mentioned above, since multiple uplink transport blocks correspond to the same PHICH resource, using the HARQ response information bundling processing method in Table 1-2 to transmit the same uplink HARQ response information for the multiple uplink transport blocks will cause errors in correct transmission. The user equipment of the uplink transport block may still receive the response information about the wrong transmission of this transport block, causing misunderstanding. This problem will be solved through subsequent processing by the base station and user equipment, that is, when the bundled uplink HARQ response information is NACK, the user equipment will not only non-adaptively retransmit the bundled uplink For the uplink transmission block of the HARQ response information and the transmission error (that is, the response information corresponding to the uplink transmission block is NACK), the uplink HARQ response information corresponding to the bundled uplink HARQ response information is retransmitted non-adaptively, but the transmission is correct (that is, the corresponding uplink transmission block is NACK). The response information of the uplink transport block is the uplink transport block of ACK). Since the PHICH resources of multiple uplink transport blocks after retransmission still collide, the base station still responds according to Table 1-2. This process will continue until all uplink transmission blocks are transmitted correctly or the maximum number of HARQ retransmissions is reached.

In this bundling mode, the retransmission of the above-mentioned correctly transmitted uplink transmission block will cause a certain increase in the overhead of the uplink shared channel and the downlink control channel, and when the wrongly transmitted uplink transmission block finally fails after being retransmitted many times, This bundling method will cause the correctly transmitted uplink transmission block to be misunderstood by the corresponding user equipment as a transmission error, resulting in greater losses. Therefore, this bundling method can only be used in a limited range. Note that the uplink transmission blocks where the multiple PHICH resources collide may belong to the same user equipment, or may belong to several user equipments respectively. Therefore, when the PHICH resources corresponding to the above multiple transmission blocks are the same, one or more user equipments will use Mapped to the same ACK/NACK response information on the same PHICH resource. The user equipment will detect and receive the PDCCH sent to it on the control channel, including uplink allocation information. In the uplink HARQ response information bundling instruction transmission method of the present invention, the user equipment will determine its subsequent user equipment behavior based on the uplink HARQ response information and the detected PDCCH uplink allocation information (TS 36.300 V8.9.0, "Evolved Universal Terrestrial Radio Access ( E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2"), as shown in Table 2.

Table 2

As shown in Table 2, in the present invention, the behaviors of the user equipment are divided into the following types:

1. If the HARQ response information received by the user equipment is ACK or NACK, and the received PDCCH uplink allocation information is a new transmission, the user equipment will consider that the previously sent uplink transmission block has been successfully received by the base station, so it will follow the PDCCH instruction, transmit new data;

2. If the HARQ response information received by the user equipment is ACK, but does not receive the PDCCH uplink allocation information at the same time, the user equipment will not be able to judge whether the previously sent uplink transmission block has been successfully received by the base station, so it can only keep the HARQ cache data, waiting for the subsequent PDCCH;

3. If the HARQ response information received by the user equipment is ACK or NACK, and the received PDCCH uplink allocation information is retransmission of the data sent last time, the user equipment will consider that the previously sent uplink transport block has not been successfully received by the base station, According to the PDCCH instruction, the data sent last time will be adaptively retransmitted;

4. If the HARQ response information received by the user equipment is NACK, but the PDCCH uplink allocation information is not received at the same time, the user equipment will consider that the previously sent uplink transmission block has not been successfully received by the base station, so it will follow the LTE release 8 regulations The uplink non-adaptive retransmission method retransmits the data sent last time.

It should be noted that the user equipment can receive the above-mentioned uplink HARQ response information and PDCCH uplink allocation information in the same downlink subframe or in different downlink subframes, and its time validity can be in accordance with LTE Release 8 According to relevant regulations, when receiving NACK, the PDCCH needs to be sent to the user equipment before the period of non-adaptive retransmission of the user equipment arrives, and when receiving ACK, the sending time of PDCCH is not specified.

The uplink HARQ response information bundling instruction transmission method described above can also be applied to the situation where the user equipment adopts the uplink MIMO technology, or the situation where two or more uplink transmission blocks correspond to the same time-frequency physical resource. At this time, multiple uplink transmission blocks pass through the airspace Signal processing is separated. The uplink MIMO technology here includes uplink single-user MIMO (Single User MIMO) and multi-user MIMO (Multiple User MIMO). In a system using uplink MIMO technology, the PHICH resources corresponding to multiple uplink transmission blocks may still collide. The reason for the collision of PHICH resources at this time is that multiple transmission blocks are mapped to the same time-frequency physical resource. caused by. Certainly, when the carrier aggregation and uplink MIMO technology are adopted in the system at the same time, the scene of PHICH resource collision will be more frequent, and the present invention can also be applied to the system adopting the carrier aggregation and uplink MIMO technology at the same time.

How to apply the present invention to these scenarios will be explained below through several examples.

Fig. 3 shows a schematic diagram of a method for transmitting an uplink HARQ response information bundling indication when uplink transmission involves MIMO technology. As shown in Figure 3, taking two users as an example, one of the users is a MIMO user and owns uplink transmission block 1 and uplink transmission block 2 (take two uplink transmission blocks of the same time-frequency resource on an uplink component carrier as an example ), respectively corresponding to two PHICH resources (PHICH resource 1 and PHICH resource 2), and another user is a non-MIMO user, and its uplink transmission block 3 (taking an uplink transmission block on an uplink component carrier as an example) also corresponds to PHICH resource 2 is allocated, so a PHICH resource collision occurs between two uplink transmission blocks (uplink transmission block 2 and uplink transmission block 3) of two users. The transmission of the HARQ response information corresponding to the two uplink transmission blocks that collided and the subsequent behaviors of the base station and the user equipment will be implemented according to the above-mentioned method for transmitting the bundling instruction of the uplink HARQ response information in the PHICH of the present invention.

Fig. 4 shows another schematic diagram of the uplink HARQ response information bundling indication transmission method when the uplink transmission involves MIMO technology.

The difference between FIG. 4 and FIG. 3 is that two uplink transmission blocks of a MIMO user and one uplink transmission block of a non-MIMO user both use the same PHICH resource. At this time, the transmission of the uplink HARQ response information corresponding to the three uplink transmission blocks that collided and the subsequent behaviors of the base station and the user equipment will be implemented according to the above-mentioned method for transmitting the bundling instruction of the uplink HARQ response information in the PHICH of the present invention.

Fig. 5 shows another schematic diagram of the HARQ response information bundling indication transmission method when the uplink transmission involves MIMO technology.

The difference between Figure 5 and Figure 3 is that both users are MIMO users, corresponding to uplink transmission block 1, uplink transmission block 2 and uplink transmission block 3, uplink transmission block 4 (each user corresponds to an uplink component carrier on the Two uplink transmission blocks with the same time and frequency are taken as an example). If the uplink transmission block 2 of MIMO user 1 collides with the PHICH resource of uplink transmission block 3 of MIMO user 2, the transmission of the HARQ response information corresponding to the two collided uplink transmission blocks and the subsequent behavior of the base station and user equipment will follow this The method for transmitting the bundling indication of the uplink HARQ response information in the PHICH mentioned above is realized.

It should be noted that the above only lists some scenarios, and for those skilled in the art, other similar scenarios can be easily conceived on the basis of the full disclosure of the present invention.

A mobile communication system according to an embodiment of the present invention may include user equipment and a base station, and may adopt carrier aggregation technology and/or uplink MIMO technology.

When the user equipment is performing uplink transmission, when the PHICH resources corresponding to multiple uplink transmission blocks using MIMO technology are the same, or the PHICH resources corresponding to multiple uplink transmission blocks distributed on different uplink component carriers are the same, or MIMO technology is adopted When several of the multiple uplink transmission blocks of the technology have the same PHICH resource corresponding to several uplink transmission blocks on other uplink component carriers, or one or more uplink transmission blocks of the user equipment are related to another or more user equipment When the PHICH resources corresponding to one or more uplink transmission blocks of the equipment are the same, the one or more user equipments will use the same uplink HARQ response information mapped to the same PHICH resource as the HARQ response of the uplink transmission block information, and determine the subsequent behavior of the user equipment according to the received HARQ response information and PDCCH uplink allocation information in the manner shown in Table 2.

When the base station feeds back the uplink HARQ response information of multiple uplink transport blocks using the same PHICH resource, the uplink HARQ response information of multiple uplink transport blocks can be bundled and processed in the manner shown in Table 1-1 to generate one uplink HARQ response information , sending in the PHICH resource; when the one uplink HARQ response information is ACK, for an uplink transport block that actually fails to be transmitted, send PDCCH uplink allocation information to implement adaptive retransmission of the uplink transport block.

On the other hand, when the base station feeds back the uplink HARQ response information of the multiple uplink transport blocks using the same PHICH resource, it can also bundle and process the uplink HARQ response information of multiple uplink transport blocks in the manner shown in Table 1-2. One piece of uplink HARQ response information is sent in the PHICH resource; when the one uplink HARQ response information is NACK, not only non-adaptively retransmit the transmission error corresponding to the bundled uplink HARQ response information (that is, to The response information of the uplink transmission block should be NACK), and non-adaptively retransmit the uplink HARQ response information corresponding to the bundled uplink transmission block, but the transmission is correct (that is, the response information corresponding to the uplink transmission block is ACK). Uplink transmission blocks until all uplink transmission blocks are successfully transmitted or the maximum number of HARQ retransmissions is reached.

In order to realize the above-mentioned uplink HARQ response information bundling instruction transmission method, the present invention also provides a base station, and FIG. 6 shows a schematic structural block diagram of the base station according to the present invention. As shown in FIG. 6 , the base station includes: a resource collision detection unit 601 , a bundling processing unit 602 and a new transmission/retransmission scheduling unit 603 .

The resource collision detection unit 601 is used to detect whether the PHICH resource corresponding to the uplink transport block collides, and transmits the uplink transport block information involved in the collision (for example, may include the PHICH resource, the HARQ response information of each uplink transport block, etc.) to the binding processing unit 602 .

The bundling processing unit 602 is used for bundling and feeding back the HARQ response information of the uplink transport block where the PHICH collision occurs according to the manner in Table 1-1. The new transmission/retransmission scheduling unit 603 is configured to, when at least one successful uplink transmission block is included in the multiple uplink transmission blocks, for each uplink transmission block corresponding to the transmission failure in the multiple uplink transmission blocks The user equipment sends PDCCH uplink allocation information indicating retransmission of the uplink transmission block; and for the user equipment corresponding to each uplink transmission block successfully transmitted among the plurality of uplink transmission blocks, if the user equipment has data to be sent , PDCCH uplink allocation information indicating transmission of a new uplink transport block may be sent. When the multiple uplink transmission blocks fail to be transmitted, the new transmission/retransmission scheduling unit 603 does not send the PDCCH uplink allocation information.

The bundling processing unit 602 may also bundle and feed back the HARQ response information of the uplink transport block where the PHICH collision occurs according to the manner in Table 1-2. At this time, the new transmission/retransmission scheduling unit 603 may, when all the multiple uplink transmission blocks have been successfully transmitted, for the user equipment corresponding to each successfully transmitted uplink transmission block among the multiple uplink transmission blocks, if The user equipment has data to be sent, and may send PDCCH uplink allocation information indicating the transmission of a new uplink transmission block; and when the multiple uplink transmission blocks include at least one uplink transmission block that fails to be transmitted, for the multiple uplink transmission blocks The user equipment corresponding to each uplink transport block in the transport block sends PDCCH uplink allocation information indicating retransmission of the uplink transport block, or no PDCCH uplink allocation information at all.

Thus, the user equipment can implement adaptive retransmission of the uplink transmission block in subsequent operations.

In the above description, multiple examples are listed for each step. Although the inventors try to mark the examples that are related to each other as much as possible, this does not mean that these examples necessarily have a corresponding relationship according to the corresponding labels. As long as there is no contradiction between the conditions given by the selected examples, in different steps, examples with non-corresponding labels can be selected to form corresponding technical solutions, and such technical solutions should also be regarded as being included in the scope of the present invention. within range.

It should be noted that, in the above description, the technical solution of the present invention is shown by way of example only, but it does not mean that the present invention is limited to the above steps and unit structures. Where possible, adjustments and trade-offs can be made to the steps and unit structures as needed. Therefore, certain steps and units are not essential elements for implementing the general inventive idea of the present invention. Therefore, the necessary technical features of the present invention are only limited to the minimum requirements capable of realizing the general inventive concept of the present invention, and are not limited by the above specific examples.

So far the invention has been described with reference to the preferred embodiments. It should be understood that various other changes, substitutions and additions can be made by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, the scope of the present invention is not limited to the specific embodiments described above, but should be defined by the appended claims.

Claims (18)

1. the automatic request retransmission HARQ response message of up mixing bundlees indication transmission method, comprising:

Schedule information according to each uplink transmission block is determined and the automatic request retransmission indicating channel of the corresponding physical mixed of described uplink transmission block PHICH resource; And

If determine that the pairing PHICH resource of a plurality of uplink transmission blocks is identical, then to bundling processing with the corresponding a plurality of HARQ response messages of described a plurality of uplink transmission blocks, producing single ascending HARQ response message, and in described PHICH resource, send the single ascending HARQ response message that is produced.

2. ascending HARQ response message binding indication transmission method according to claim 1 also comprises:

When comprising the uplink transmission block of at least one transmission success in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, send the physical downlink control channel PDCCH uplink assignment information that indication retransmits described uplink transmission block.

3. ascending HARQ response message binding indication transmission method according to claim 2 also comprises:

When comprising the uplink transmission block of at least one transmission success in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.

4. according to claim 2 or 3 described ascending HARQ response message binding indication transmission methods, it is characterized in that:

When the equal bust this of described a plurality of uplink transmission blocks, do not send PDCCH uplink assignment information.

5. according to the described ascending HARQ response message binding of one of claim 1～4 indication transmission method, it is characterized in that:

When being HARQ wrong responses NACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding is handled and is produced single HARQ NACK, otherwise described binding is handled and produced single HARQ affirmative acknowledgement ACK.

6. ascending HARQ response message binding indication transmission method according to claim 1 also comprises:

When described a plurality of uplink transmission blocks all during transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the physical downlink control channel PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.

7. ascending HARQ response message binding indication transmission method according to claim 6 also comprises:

When comprising the uplink transmission block of at least one bust this in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block.

8. according to claim 6 or 7 described ascending HARQ response message binding indication transmission methods, it is characterized in that:

When comprising the uplink transmission block of at least one bust this in described a plurality of uplink transmission blocks, do not send PDCCH uplink assignment information.

9. according to the described ascending HARQ response message binding in one of claim 1 and 6～8 indication transmission method, it is characterized in that:

When being HARQ and correctly replying ACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding is handled and is produced single HARQ ACK, otherwise described binding is handled and produced single HARQ wrong responses NACK.

10. base station comprises:

The resource collision detection unit, be used for determining and the automatic request retransmission indicating channel of the corresponding physical mixed of described uplink transmission block PHICH resource, and whether detect the pairing PHICH resource of a plurality of uplink transmission blocks identical according to the schedule information of each uplink transmission block; And

The binding processing unit, be used for when described resource collision detection unit determines that the pairing PHICH resource of a plurality of uplink transmission blocks is identical, to bundling processing with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, producing single ascending HARQ response message, and in described PHICH resource, send the single ascending HARQ response message that is produced.

11. base station according to claim 10 also comprises:

New biography/retransfer scheduling unit, be used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, send the physical downlink control channel PDCCH uplink assignment information that indication retransmits described uplink transmission block.

12. base station according to claim 11 is characterized in that:

Described new biography/retransfer scheduling unit also is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.

13., it is characterized in that according to claim 11 or 12 described base stations:

Described new biography/retransfer scheduling unit also is used for not sending PDCCH uplink assignment information when the equal bust this of described a plurality of uplink transmission blocks.

14., it is characterized in that according to the described base station of one of claim 10～13:

When being HARQ wrong responses NACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding processing unit produces single HARQ NACK, otherwise described binding processing unit produces single HARQ affirmative acknowledgement ACK.

15. base station according to claim 10 also comprises:

New biography/retransfer scheduling unit, be used at described a plurality of uplink transmission blocks all during transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the physical downlink control channel PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.

16. base station according to claim 15 is characterized in that:

Described new biography/retransfer scheduling unit also is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one bust this, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block.

17., it is characterized in that according to claim 15 or 16 described base stations:

Described new biography/retransfer scheduling unit also is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one bust this, does not send down control channel PDCCH uplink assignment information.

18., it is characterized in that according to the described base station in one of claim 10 and 15～17:

When being HARQ and correctly replying ACK with the corresponding a plurality of HARQ response messages of described a plurality of uplink transmission blocks, described binding processing unit produces single HARQ ACK, otherwise described binding processing unit produces single HARQ wrong responses NACK.

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