WO2013166883A1

WO2013166883A1 - Method, user equipment and base station for transmitting or receiving uplink sps service data

Info

Publication number: WO2013166883A1
Application number: PCT/CN2013/072560
Authority: WO
Inventors: 南方; 吴强; 万蕾; 李博
Original assignee: 华为技术有限公司
Priority date: 2012-05-09
Filing date: 2013-03-14
Publication date: 2013-11-14
Also published as: CN103391175B; CN103391175A

Abstract

Disclosed is a method for transmitting uplink semi-persistent scheduling SPS service data in a frequency division duplexing FDD system. The method comprises: initially transmitting or retransmitting a data packet using transmission time interval TTI bundling of an uplink SPS service; and when a retransmission indication of the data packet is received, retransmitting the data packet, wherein under the condition of ensuring that the transmission data does not collide, the size of the TTI bundling of the initially transmitted data packet is different from that of the TTI bundling of the retransmitted data packet and/or the round-trip time delay RTT of the initial transmission or the first retransmission is different from the RTT of two adjacent retransmissions. Correspondingly, also disclosed are a method, user equipment and a base station for receiving SPS service data. The present invention increases the transmission time density when SPS service uplink data is transmitted.

Description

Method for transmitting or receiving uplink SPS service data and user equipment and base station The present application claims to be submitted to the Chinese Patent Office on May 9, 2012, the application number is 201210141497.X, and the invention name is "Method for transmitting or receiving uplink SPS service data and Priority of the Chinese Patent Application for User Equipment and Base Stations, the entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of wireless communications, and in particular, to a method for transmitting or receiving uplink semi-persistent Scheduling (SPS) service data in a Frequency Division Duplexing (FDD) system, a user equipment and a base station. Background technique

The basic principle of VoIP is to send voice data over an IP network. A business feature that is important for Long Term Evolution (LTE) is to eliminate all circuit domain services and propose the concept of an all-IP network. Therefore, VoIP is one of the types of services that LTE can support.

Through simulation and calculation, it is found that when the physical uplink shared channel is used to transmit uplink VoIP services, coverage is limited. In order to solve the problem that the coverage of the physical uplink shared channel for transmitting uplink VoIP services is limited, the prior art adopts the following scheme.

The resources of the LTE system are divided into a plurality of symbols in the time domain and are divided into subcarriers in the frequency domain. A radio frame is 10 ms long in time and contains 10 subframes. Each regular subframe is lms long and contains two slots. The length of the definition ^ subframe is ^ Transmission Time Interval (ΤΤΙ), that is, lTTI=lms. ΤΤΙ is the basic unit of time when resources are scheduled. Hybrid Automatic Repeat Request (HQQ) is a technology that combines Forward Error Correction (FEC) and Automatic Repeat Request (ARQ). The processing flow includes: including error correction and error detection bits in each data packet sent, and if the number of error bits in the received data packet is within the error correction capability of the receiving end, the error is corrected by itself. When the error is so severe that the number of error bits in the received data packet exceeds the error correction capability, the receiving end causes the transmitting end to retransmit the data packet. In LTE, multi-process stop-wait HARQ is employed. After a transmitted data packet is sent, it takes a certain time to transmit a new data packet or retransmit the old data packet. The length of the waiting time is the same as the transmission delay and the processing time of the UE or the processing time of the eNodeB. Related. Round Trip Time (RTT) is defined as the difference between the time the same packet starts from one transmission and the next. In order to make full use of the time domain resources, the eNodeB or the UE needs to initiate other parallel HARQ processes during the waiting period, and the number of parallel HARQ processes is related to the RTT. For the FDD system, the RTT is 8 TTIs, and the uplink and downlink use 8 parallel HARQ processes. For a certain HARQ process, if the data packet received by the receiving end is correct and does not need to be retransmitted, the receiving end sends an Acknowledgement (ACK) message. If the data packet received by the receiving end is incorrect, the feedback is non-acknowledgment (Negative Acknowledgement). , NACK ) message indicates retransmission. When the sender waits for ACK/NACK feedback of a certain process, the process temporarily stops transmission. When the feedback is received, whether to send a new data packet or retransmit the old data packet according to whether the ACK or NACK is fed back.

However, in the uplink data transmission of the VoIP service of the prior art UE, the time density of one data packet transmission can also be improved. Summary of the invention

The present invention provides a method for transmitting or receiving uplink SPS service data, a user equipment and a base station, to solve the problem of how to improve the time density of transmission in the uplink data transmission of the SPS service of the prior art.

In a first aspect, a method for transmitting uplink semi-persistent scheduling SPS service data in a frequency division duplex FDD system is provided, the method comprising:

Initial transmission or retransmission of the uplink SPS service using the transmission time interval TTI binding bundling data packet; and

Retransmitting the data packet when receiving the retransmission indication of the data packet, wherein the size of the TTI bundling of the initially transmitted data packet and the retransmission data packet are 在 in the case that the transmitted data does not collide The bundling size is different and/or the round-trip delay RTT of the initial transmission and the first retransmission is different from the RTT of the adjacent two retransmissions.

In a second aspect, a user equipment is provided, where the user equipment includes:

a transmission module, configured to transmit to the base station or retransmit the uplink semi-persistent scheduling SPS service by using a transmission time interval TTI to bind the bundled data packet; wherein, in the case that the transmitted data does not collide, the initially transmitted data packet The size of the TTI bundling is different from the size of the TTI bundling of the retransmitted data packet and/or the round-trip delay RTT of the initial transmission and the first retransmission is different from the RTT of the adjacent two retransmissions;

a receiving module, configured to: when receiving a retransmission indication of the data packet sent by the base station, indicating The transport module retransmits the data packet.

In a third aspect, a method for receiving uplink semi-persistent scheduling SPS service data in a frequency division duplex FDD system is provided, the method comprising:

Receiving the initial semi-persistent scheduling of the transmitted or retransmitted SPS service using the transmission time interval TTI binding bundling data packet;

When detecting the receipt of the packet error, returning a retransmission indication and receiving the retransmitted data packet, wherein the size of the TTI bundling of the initially transmitted data packet is in the case of ensuring that the transmitted data does not collide The size of the TTI bundling of the retransmitted data packet is different and/or the round-trip delay RTT of the initial transmission and the first retransmission is different from the RTT of the adjacent two retransmissions.

In a fourth aspect, a base station is provided, where the base station includes:

The receiving module is configured to receive the uplink semi-persistent scheduling SPS service of the initial transmission or retransmission of the user equipment, and use the transmission time interval TTI to bind the bundled data packet; wherein, in the case that the transmitted data does not collide, the initial transmission The size of the TTI bundling of the data packet is different from the size of the TTI bundling of the retransmitted data packet and/or the round-trip delay RTT of the initial transmission and the first retransmission is different from the RTT of the adjacent two retransmissions; the processing module is used for Detecting the data packet received by the receiving module, and when detecting the data packet error, sending a retransmission indication to the sending module;

And a sending module, configured to send the retransmission indication to the user equipment.

The invention adopts the difference of the size of the TTI bundling of the initially transmitted data packet and the size of the TTI bundling of the retransmitted data packet and/or the initial transmission and the first retransmission in the case that the guaranteed transmission data does not collide. The RTT is different from the RTT of two adjacent retransmissions, instead of using the initial data packet and the retransmitted data packet specified in the prior art protocol, the RTT of the four TTI bundling and the adjacent two transmitted data packets are used. It is a 16 TTI scheme, thereby increasing the time density of transmission in the prior art when transmitting uplink SPS services. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the prior art or the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments. Those skilled in the art can also obtain other attachments by using these drawings. Figure.

FIG. 1 is a schematic diagram of a technology in which uplink TTI bundling and HARQ are combined in the prior art; FIG. 2 is a timing diagram of multi-process transmission of uplink SPS services in the prior art;

3 is a flowchart of a method for transmitting uplink SPS service data according to an embodiment of the present invention;

4 is a schematic structural diagram of a frame according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another frame according to an embodiment of the present invention; FIG.

FIG. 5( a ) is a schematic diagram of still another frame structure according to an embodiment of the present invention;

6 is a schematic diagram of still another frame structure according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

8 is a flowchart of a method for receiving an uplink SPS service according to Embodiment 2 of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of the present invention.

For VoIP services, in order to achieve better coverage performance, the existing technology of LTE adopts a combination of TTI bundling and HARQ in the uplink. For the FDD system, a schematic diagram of TTI bundling and HARQ is shown in Figure 1. As can be seen from FIG. 1, the prior art uses four TTI bundlings, that is, different redundant versions of Protocol Data Units (PDUs) are transmitted in four consecutive TTIs (Redundancy Version, RV). ). At the same time, the protocol also stipulates that, in the prior art, the RTT of the same data packet transmitted twice in the prior art takes 16 ms. That is to say, if the detection error occurs, the 16 TTIs after the start of the data packet can be retransmitted. Moreover, in the prior art, the retransmission also uses four TTI bundlings, that is, within four consecutive TTIs. Transmit different RVs for retransmission. TTI bundling actually increases the number of retransmissions over a certain period of time and uses fewer ACK/NACK bits.

LTE introduces a new resource scheduling method, semi-static scheduling technology. The semi-persistent scheduling mode refers to the initial scheduling of the eNodeB through the physical downlink control channel during the scheduling transmission of LTE (Physical The Downlink Control Channel (PDCCH) indicates the current scheduling information of the UE. If the UE identifies the semi-persistent scheduling, the current scheduling information is saved, and the service data is transmitted or received at the same time-frequency resource location every fixed period. By using semi-persistent scheduling transmission, the characteristics of the periodic arrival of voice data packets can be fully utilized, and one-time authorization and periodic use can effectively save the PDCCH resources used by the LTE system for scheduling indication, so that the call quality and system performance can be improved without affecting the call quality and system performance. Support more voice users. In order to reduce the overhead of control signaling, uplink data can be scheduled by means of SPS; at the same time, bundling can enhance coverage.

The voice coding of the VoIP service determines the arrival period of its data packet is 20ms. Due to the quality of service requirements of the voice service, the maximum delay of the data packet from the source code encoding of the sender to the successful decoding of the receiver is 50 ms, and the retransmission of the data packet needs to be completed within 50 ms. According to the prior art scheme, if the sender detects a packet error received by the receiver, the packet will be retransmitted after 16 TTIs. Since 16msx 3 = 48ms, a packet can be transmitted a total of 3 times in 50ms, that is, it can be retransmitted up to 2 times. Since the prior art scheme uses four TTI bundlings, a packet can occupy a total of 4 ΤΉ x 3 = 12 TTI for transmission.

The VoIP service forms one PDU every 20ms. The transmission of one PDU is a HARQ process, that is, VoIP starts a new HARQ process every 20ms. Each HARQ process includes initial transmission and retransmission, and initial transmission and retransmission can be implemented by TTI bundling. In the prior art, the multi-process transmission of the uplink VoIP service under FDD is as shown in FIG. 2, in which four TTI bundling and HARQ technologies are simultaneously adopted. The same padding style is used in Figure 2 to indicate the initial and retransmission of the same packet, using different padding styles to represent different HARQ processes. The Physical Hybrid ARQ Indicator Channel (PHICH) of the eNodeB includes the ACK/NACK information fed back by the base station, and the PHICH in the figure indicates that the ACK/NACK information fed back by the base station is received at the TTI. In the VoIP service using semi-persistent scheduling non-adaptive HARQ, in order to ensure that data transmission does not collide, the same TTI cannot be used for the initial transmission and retransmission of the data packet and the retransmission and retransmission. Considering that the arrival period of VoIP packets is 20ms, each data packet can occupy a maximum transmission time of 20 TTIs. However, as can be seen from FIG. 2, since the existing LTE system uses four TTI bundlings, that is, in a continuous four TTIs, different RVs of one PDU are respectively transmitted. After receiving the four RVs, the base station may choose to combine these different RVs to detect whether the detection is correct by an ACK/NACK bit. For this detection method of the base station, when the UE completes one transmission of the four RVs of one data packet at the eleventh 111 (eg, TTI #3), the UE will be at the n+4th TTI, eg, TTI #7 Receiving a message about the packet fed back by the base station ACK/NACK of the secondary transmission. When the UE receives the ACK/NACK and then considers the processing delay of the UE, the next retransmission of the data packet by the UE may be transmitted at least on the n+8th TTI (eg, TTI #11). Therefore, for the above solution in the prior art, the RTT can be at least 1 lms. The existing protocol ΤΉbundling takes 16ms, which causes the UE to use up to 12 TTIs in the uplink data transmission of the SPS service, such as VoIP service, and 8 TTIs that can be utilized are not utilized. The time density of the transmission is not maximized and can be improved.

Further, in the above solution, after receiving the four RVs of a TTI bundling, the base station combines the four different RVs to detect. The base station may also not combine the four RVs, but immediately after receiving the first RV, and determine whether retransmission is required according to the detection result of the RV. Assuming that the UE transmits an RV of a data packet at the 11th 111 (eg, TTI #0), the UE will receive feedback from the base station at the n+4th TTI (eg, TTI #4). This packet is the ACK/NACK of this RV. If a NACK is received, the UE's next retransmission of this packet can be sent at least on the n+8th TTI (eg, ΤΤΙ #8). Subsequent base station detection is performed by combining the remaining 3 RVs with the first RV of the next retransmission. For this detection scheme of the base station, the RTT can be 8 ms. Therefore, RTT can also be less than l lms.

It should be noted that although the above problems are obtained for the analysis of VoIP services, other services using TTI bundling and SPS transmission have the same problem.

Based on the above problems, embodiments of the present invention provide an implementation of a method of transmitting or receiving semi-statically scheduled SPS service data, which improves the time density of transmission.

Embodiment 1

In one aspect, the embodiment of the present invention provides a method for transmitting uplink semi-persistent scheduling SPS service data, as shown in FIG. 3, the method includes:

Step 301: Initially transmit or retransmit the data packet of the uplink SPS service using the TTI bundling; Step 302, when receiving the retransmission indication of the data packet, retransmit the data packet, where the data that is guaranteed to be transmitted is not In the case of a collision, the size of the TTI bundling of the initially transmitted packet is different from the size of the TTI bundling of the retransmitted packet and/or the initial transmission is different from the RTT of the first retransmission and the RTT of the adjacent two retransmissions. It should be noted that the retransmission indication in the embodiment of the present invention may be a NACK message, but the embodiment of the present invention is not limited to a NACK message, and may be other types of retransmission indications. In the following, the NACK message is taken as an example for description.

In this embodiment, the size of the transmitted TTI bundling may be an integer multiple of 4, or may not be, wherein the redundancy version number of ΤΤΙ bundling is 0, 2, 3, 1, 0, 2, 3, 1, 0. The order of ..... is arranged.

In this embodiment, the size of the TTI bundling of the initially transmitted data packet and the size of the TTI bundling of the retransmitted data packet are different and/or the RTT of the initial transmission and the first retransmission and the RTT of the adjacent two retransmissions Differently, instead of using the initial data packet and the retransmitted data packet specified in the prior art protocol, four und bundlings are used, thereby improving the time density of transmission in the VoIP uplink data transmission in the prior art.

Further, in this embodiment, the RTT transmitted twice adjacent to each other may be at least 11 ΤΉ.

In this embodiment, the same data packet is retransmitted at most twice.

Among them, the initial data packet uses 8 b bundling, the first retransmitted data packet uses 4 TTI bundling, and the second retransmitted data packet uses 8 TTI bundling. Preferably, the first retransmission and the initial transmission RTT are 16 TTIs, and the second retransmission and the first retransmission RTT are 12 TTIs.

Or

The initial data packet uses 4 b bundlings, the first retransmitted data packet uses 8 TTI bundlings, and the second retransmitted data packet uses 8 TTI bundlings. Preferably, the RTT of the first retransmission and the initial transmission is 12 TTIs, and the RTT of the second retransmission and the first retransmission is 32 TTIs.

Or

The initial data packet uses 4 b bundlings, the retransmitted data packet uses 16 TTI bundlings, and the retransmissions and initial transmissions of the RTT are 24 ΤΉ.

The embodiment of the present invention is directed to a semi-persistent scheduling service, which can maximize the time density of transmission in the case of ensuring that the transmitted data does not collide, so that a data packet occupies a transmission time of up to 20 ms in 50 ms, thus adding a data packet. The number of retransmissions, so that the VoIP service requires a certain rBLER performance requirement, the required signal-to-noise ratio is reduced, thus enhancing coverage.

Based on the above method, this embodiment also provides an application example of three optional data frame structures.

Application example one

In an application example of a frame structure, as shown in FIG. 4, the initial data packet adopts 8 TTIs. Bundling, the first retransmitted packet uses four TTI bundlings, and the second retransmitted packet uses eight TTI bundlings. Preferably, the RTT of the first packet and the retransmission of the same data packet is 16, and the RTT of the two retransmissions is 12, and the data packet can be retransmitted at most twice.

Specifically, if an initial transmission packet fails to be detected, that is, the NACK of the initially transmitted data packet is received, the data packet is retransmitted, and the RTT of the first retransmitted data packet and the first transmitted data packet is 16 TTI, that is to say, the data packet will be retransmitted for the first time after the 16th TTI after the start of the initial data packet. Therefore, the end time of the initial data packet and the start time of the first retransmission The interval between them is 8 TTIs. If the first retransmission detection of the data packet fails, the RTT of the second retransmitted data packet and the first retransmitted data packet is 12, so the end time of the first retransmission of the data packet and The interval between the start times of the second retransmission is 8 ΤΤΙ. Considering the 50ms delay requirement, one packet in this example can be retransmitted up to 2 times, that is, up to a total of 3 times, and the second retransmission is completed at 36ms.

It can be seen that compared with the data packet transmitted in the prior art and the data packet of the first retransmission and the data packet of the two retransmissions in the prior art, the application example shortens the retransmission twice. RTT between packets. Compared with the TTI bundling size of the initial transmission and retransmission in the prior art, the TTI bundling size of the packet initial transmission and the second retransmission is changed to 8 TTIs. Moreover, as can be seen from Figure 4, multiple processes happen to fill the 时 in the time domain, and the time domain density of the transmission is maximized.

Application Example 2 In an application example of a frame structure, as shown in FIG. 5, the initial data packet uses four bundled bundlings, the first retransmission uses eight TTI bundlings, and the second retransmission data. The package uses 8 bundles of bundling. Preferably, the RTT of the initial transmission and the retransmission of the same data packet is 12, and the RTT of the two consecutive retransmissions is 32, and the data packet can be retransmitted at most twice.

Specifically, if an initial transmission packet fails to be detected, that is, the NACK of the initially transmitted data packet is received, the data packet is retransmitted, and the RTT of the first retransmitted data packet and the first transmitted data packet is 12. TTI, that is to say, the data packet will be retransmitted for the first time after the 12th TTI after the start of the initial data packet. Therefore, the end time of the first data packet and the first retransmission in this example. The interval between the start times is 8 TTIs. If the first retransmission detection of the data packet fails, the RTT of the second retransmitted data packet and the first retransmitted data packet are 32 ΤΤΙ. Therefore, in this example, the data packet is retransmitted for the first time. The interval between the end time and the start time of the second retransmission is 24 ΤΤΙ. Considering the 50 ms delay requirement, one packet in this application example can be retransmitted up to 2 times, that is, up to 3 times in total, and the second retransmission is completed at 52 ms. It can be seen that this application example shortens the initial data packet compared with the data packet transmitted in the prior art and the data packet of the first retransmission and the data packet of the two retransmissions are both 16 ms RTT. With the RTT of the first retransmitted packet, the RTTo of the first retransmitted packet and the second retransmitted packet are extended with the TTI bundling size of the prior art for initial transmission and retransmission to 4 Compared with TTI, this application example changes the TTI bundling size of the first retransmitted data packet and the second retransmitted data packet to 8 TTIo. As can be seen from Fig. 5, multiple processes just fill up. In the time domain, the time domain density of the transmission is maximized.

Application example three

In another application example of a frame structure, as shown in FIG. The initial data packet uses 4 b bundlings, the retransmitted data packet uses 16 TTI bundlings, and the initial packet and retransmission RTT of the same data packet is 24, and the data packet can be retransmitted at most once.

Specifically, if an initial data packet fails to be detected, that is, the NACK of the initially transmitted data packet is received, and the data packet is retransmitted, and the RTT of the first retransmitted data packet and the first transmitted data packet is 24 TTI, that is to say, the data packet will be retransmitted for the first time after the 24th TTI after the start of the initial data packet. Therefore, in this example, the end time of the initial data and the start of the first retransmission The interval between times is 20 ΤΉ. Considering the 50ms delay requirement, a packet in this example can be retransmitted at most once, that is, up to a total of 2 times, and this retransmission is completed at the 40th.

It can be seen that the application example extends the initial data packet compared with the data packet transmitted in the prior art and the data packet of the first retransmission and the data packet of the two retransmissions are both 16 ms RTT. RTT with the retransmitted packet. Compared with the TTI bundling of the initial transmission and the retransmission in the prior art, the size of the TTI bundling is changed to 16 TTIs. Moreover, as can be seen from Figure 6, multiple processes just occupy the time domain, and the time domain density of the transmission is maximized.

It should be noted that the frame structure of the above three application examples given in the embodiments of the present invention is only for some alternatives, and the embodiment of the present invention is not limited thereto, as long as it is the initial data packet. The size of the bundling and the size of the TTI bundling of the retransmitted data packet are different and/or the frame structure of the original RTT different from the first retransmitted RTT and the adjacent two retransmitted RTT may be, for example, as shown in FIG. 5 (a The frame structure shown, the initial data packet uses 4 TTI bundling, the first retransmitted data packet uses 9 TTI bundling, and the second retransmitted data packet uses 7 TTI bundling, and The RTT of the first packet and the first retransmission of the same packet is 11, and the RTT of the two retransmissions is 33, and one packet can be retransmitted at most. 2 times.

In addition, the frame structure provided by the embodiment of the present invention is a frame structure capable of occupying a frame on the time domain, so that the time domain density of the transmission is maximized. Of course, it is also possible not to fill up the 时 in the time domain, but only by using the RTT of the two adjacent transmissions at least 11 ΤΤΙ, and the size of the 初 bundling of the initial data packet and the 重 of the retransmitted data packet The size of the bundling is different and/or the frame structure of the RTT of the first transmission and the first retransmission is different from that of the adjacent two retransmissions, and further utilizes the 8 TTIs that can be utilized but not utilized in the prior art. One or more TTIs to increase the time density of the transmission.

In the embodiment of the present invention, for the uplink SPS service, when the data to be transmitted does not collide, the time density of the transmission is maximized, so that a data packet occupies a transmission time of up to 20 ms in 50 ms, thus increasing the weight of one data packet. The number of transmissions, so that the VoIP service requires a certain rBLER performance requirement, the required signal-to-noise ratio is reduced, thus enhancing coverage.

On the other hand, the embodiment further provides a user equipment. As shown in FIG. 7, the user equipment includes: a transmission module 701, configured to transmit or retransmit an uplink semi-persistent scheduling SPS service to a base station. The TTI is bound to the bundled packet; wherein, in the case that the transmitted data does not collide, the size of the TTI bundling of the initially transmitted packet is different from the size of the TTI bundling of the retransmitted packet and/or the first pass and the first The retransmission of the RTT is different from the RTT of the two retransmissions; and

The receiving module 702 is configured to, when receiving the retransmission indication of the data packet sent by the base station, instruct the transmission module 701 to retransmit the data packet.

In this embodiment, the size of the TTI bundling of the initially transmitted data packet is different from the size of the TTI bundling of the retransmitted data packet, and/or the initial transmission and the RTT of the first retransmission are different from the RTT of the adjacent two retransmissions. Instead of adopting the initial data packet and the retransmitted data packet specified in the prior art protocol, four und bundling and the RTT of the adjacent two transmitted data packets are 16 TTI schemes, thereby improving the existing The time density of transmission during VoIP uplink data transmission in the technology.

In this embodiment, the RTT transmitted twice adjacent to each other may be at least 11 TTIs. The packet is retransmitted at most twice.

Among them, the initial data packet uses 8 b bundling, the first retransmitted data packet uses 4 TTI bundling, and the second retransmitted data packet uses 8 TTI bundling. Preferably, the first weight The RTT transmitted and transmitted is 16 TTIs, and the RTT of the second retransmission and the first retransmission is 12 ΤΤΙ. or,

Or

In this embodiment, the round-trip delay RTT of the adjacent two transmissions is at least 11 TTIs, and the size of the TTI bundling of the initially transmitted data packet and the size of the TTI bundling of the retransmitted data packet are different and/or initial transmission and The first retransmission of the RTT is different from the adjacent two retransmissions of the RTT, instead of using the initial data packet and the retransmitted data packet specified in the prior art protocol, four TTI bundlings are used and two adjacent times. The RTT of the transmitted data packet is a 16 TTI scheme, thereby maximizing the time density of transmission in the prior art VoIP uplink data transmission.

Embodiment 2

A second embodiment of the present invention provides a method for receiving uplink SPS service data in the uplink. As shown in FIG. 8, the method includes:

Step 801: Receive a TTI bundling data packet of the uplink SPS service that is initially transmitted or retransmitted. Step 802: When detecting that the data packet error is received, return a retransmission indication and receive the retransmitted data packet. ;

Wherein, in the case that the transmitted data does not collide, the size of the TTI bundling of the initially transmitted data packet and the size of the TTI bundling of the retransmitted data packet are different and/or the initial transmission and the RTT of the first retransmission are adjacent to each other. The RTT of the two retransmissions is different.

In this embodiment, the round-trip delay RTT of the adjacent two transmissions is at least 11 TTIs, and the size of the TTI bundling of the initially transmitted data packet and the size of the TTI bundling of the retransmitted data packet are different and/or initial transmission and The first retransmission of the RTT is different from the adjacent two retransmissions of the RTT, instead of using the initial data packet and the retransmitted data packet specified in the prior art protocol, four TTI bundlings are used and two adjacent times. Number of transmissions According to the RTT of the packet, the scheme of 16 TTIs improves the time density of transmission in the VoIP uplink data transmission in the prior art.

In this embodiment, the RTTs transmitted in the adjacent two times may be at least 11 TTIs, and the data packets that are retransmitted are received at most twice.

Among them, the initial data packet uses 8 TTI bundlings, the first retransmitted data packet uses 4 TTI bundlings, and the second retransmitted data packet uses 8 TTI bundlings. Preferably, the RTT of the first retransmission and the initial retransmission is 16 TTIs, and the RTT of the second retransmission and the first retransmission is 12 TTIs.

Or

On the other hand, the embodiment further provides a base station. As shown in FIG. 9, the base station includes: a receiving module 901, configured to receive a data packet of an uplink SPS service that is initially transmitted or retransmitted by the user equipment by using a bundling packet. Wherein, in the case of ensuring that the transmitted data does not collide, the size of the TTI bundling of the initially transmitted packet is different from the size of the TTI bundling of the retransmitted packet and/or the RTT and phase of the initial transmission and the first retransmission The RTT of the two retransmissions is different;

The processing module 902 is configured to detect the data packet received by the receiving module 901, and send a retransmission indication to the sending module 903 when the data packet error is detected; The sending module 903 is configured to send a retransmission indication to the user equipment.

The technical effects obtained in this embodiment are the same as those in the method embodiment in the second embodiment, and are not described here.

In this embodiment, the RTT transmitted twice adjacent to each other may be at least 11 ΤΤΙ. The receiving module 901 receives the data packet of two retransmissions.

Among them, the initial data packet uses 8 b bundling, the first retransmitted data packet uses 4 TTI bundling, and the second retransmitted data packet uses 8 TTI bundling. Preferably, the RTT of the first retransmission and the initial retransmission is 16 TTIs, and the RTT of the second retransmission and the first retransmission is 12 TTIs.

Or

The first transmitted data packet uses four b bundlings, the first retransmitted data packet uses eight TTI bundlings, and the second retransmitted data packet uses eight TTI bundlings. Preferably, the RTT of the first retransmission and the initial transmission is 12 TTIs, and the RTT of the second retransmission and the first retransmission is 32 TTIs.

Or

For the SPS service, the embodiment of the present invention maximizes the time density of transmission in the case of ensuring that the transmitted data does not collide, so that a data packet occupies a transmission time of up to 20 ms in 50 ms, thus increasing the number of retransmissions of one data packet. Therefore, the required signal-to-noise ratio is reduced in the case of a certain rBLER performance requirement of the VoIP service, thereby enhancing coverage.

In addition, the embodiment of the present invention further provides a system for retransmitting uplink VoIP service data, where the system includes a base station and user equipment, where

a user equipment, configured to transmit a TSI bundling data packet to the base station for initial uplink SPS service; and retransmit the data packet when receiving the retransmission indication of the data packet sent by the base station, where the data is guaranteed to be transmitted In the case of no collision, the size of the TTI bundling of the initial transmitted packet is different from the size of the TTI bundling of the retransmitted packet and/or the initial transmission is different from the RTT of the first retransmission and the RTT of the adjacent two retransmissions. ;

The base station is configured to receive the uplink SPS service initially transmitted or retransmitted by the user equipment by adopting TTI bundling The data packet detects the received data packet, and when the data packet error is detected, sends a retransmission indication to the user equipment.

In this embodiment, the RTT transmitted twice adjacent to each other may be at least 11 ΤΤΙ. The packet is retransmitted at most twice.

Or,

Or

The technical effects of the embodiments of the present invention are the same as those of the foregoing method embodiments. For reference, the description of the foregoing method embodiments is omitted, and details are not described herein again.

By designing a new TTI bundling size and HARQ RTT time, the embodiment of the present invention solves the problem that the time domain density of the transmission is not maximized when the TTI bundling and HARQ technologies are used only under the original UL SPS, and the data packet is guaranteed. When the initial transmission and retransmission, retransmission and retransmission do not collide, a packet can occupy up to 20 TTIs for transmission, and more redundant versions can be transmitted within 50 ms (the redundancy version number is 0, 2. 3, 1, 0, 2, 3, 1 ... order), more efficient use of the time domain resources available for transmission, thereby achieving the purpose of enhancing UL VoIP coverage.

It should be noted that, in the implementation manner of the foregoing user equipment and the base station, the division of each functional module is only an example. In actual applications, the foregoing functions may be considered according to requirements, such as configuration requirements of corresponding hardware or convenience of implementation of software. The allocation is performed by different functional modules, that is, the internal structure of the user equipment and the base station are divided into different functional modules to complete all or part of the above description. Features. Moreover, in practical applications, the corresponding functional modules in this embodiment may be implemented by corresponding hardware, or may be performed by corresponding hardware to execute corresponding software. For example, the foregoing transmission module may be configured to perform the foregoing to the base station. The hardware of the bundling packet function, such as the transmitter, may also be a general transceiver or other hardware device capable of executing the corresponding computer program to perform the foregoing functions; and the processing module as described above, It may be hardware having a function of performing the foregoing detection of the data packet received by the receiving module, and transmitting a NACK message to the transmitting module when detecting the data packet error, such as a processor, or may be capable of executing a corresponding computer program. A general processor or other hardware device that performs the aforementioned functions (the various embodiments described in this specification apply the above described principles).

It should be noted that the information interaction, the execution process, and the like between the modules/units of the foregoing device are based on the same concept as the method embodiment of the present invention, and the technical effects thereof are the same as the embodiment of the method of the present invention. Refer to the description in the method embodiment of the present invention, and details are not described herein again.

A person skilled in the art can understand that all or part of the steps of the foregoing embodiments can be completed by a program to instruct related hardware. The program can be stored in a computer readable storage medium, and the storage medium can include: Read only memory (ROM, Read Only Memory), random access memory (RAM), disk or optical disk.

The method and the user equipment and the base station provided by the embodiments of the present invention are described in detail above. The principles and embodiments of the present invention are described in the following. The description of the foregoing embodiments is only for helping to understand the method of the present invention. And the core idea thereof; at the same time, those skilled in the art, according to the idea of the present invention, there are some changes in the specific embodiments and application scopes. In summary, the content of the present specification should not be construed as the present invention. limits.

Claims

Rights request

1. A method for transmitting uplink semi-statically scheduled SPS service data in a frequency division duplex FDD system, characterized in that the method includes:

The initial transmission or retransmission of the uplink SPS service adopts the transmission time interval TTI binding bundling data packet; and

When the retransmission indication of the data packet is received, the data packet is retransmitted, wherein the TTI bundling size of the initially transmitted data packet and the TTI of the retransmitted data packet are determined by ensuring that the transmitted data does not collide. The size of the bundling is different and/or the round-trip delay RTT of the initial transmission and the first retransmission is different from the RTT of two adjacent retransmissions.

2. The method of claim 1, wherein the RTT of two adjacent transmissions is at least 11 TTIs.

3. The method of claim 1 or 2, wherein the data packet is retransmitted at most twice.

4. The method according to claim 1 or 2, characterized in that,

The initially transmitted data packet adopts 8 TTI bundling, the first retransmitted data packet adopts 4 TTI bundling, and the second retransmitted data packet adopts 8 TTI bundling.

5. The method of claim 4, wherein the RTT between the first retransmission and the initial transmission is 16 TTIs, and the RTT between the second retransmission and the first retransmission is 12 TTIs. ΤΉ.

6. The method according to claim 1 or 2, characterized in that,

The initially transmitted data packet adopts 4 TTI bundling, the first retransmitted data packet adopts 8 TTI bundling, and the second retransmitted data packet adopts 8 TTI bundling.

7. The method of claim 6, wherein the RTT between the first retransmission and the initial transmission is 12 TTIs, and the RTT between the second retransmission and the first retransmission is 32 TTIs. ΤΉ.

8. The method of claim 1, wherein the initially transmitted data packet adopts a bundling of 4 TTIs, the retransmitted data packet adopts a bundling of 16 TTIs, and the RTT of the retransmitted and initially transmitted is 24 TTIo

9. A user equipment, characterized in that the user equipment includes:

The transmission module is used to initially transmit or retransmit the adopted transmission time of the uplink semi-statically scheduled SPS service to the base station. Interval TTI bundling data packets; where, while ensuring that the transmitted data does not collide, the size of the TTI bundling of the initially transmitted data packet is different from the size of the TTI bundling of the retransmitted data packet and/or the initial transmission is different from the size of the TTI bundling of the retransmitted data packet. The round-trip delay RTT of one retransmission is different from the RTT of two adjacent retransmissions; and

The receiving module is configured to instruct the transmission module to retransmit the data packet when receiving the retransmission instruction of the data packet sent by the base station.

10. The user equipment according to claim 9, characterized in that the RTT of two consecutive transmissions is at least 11 TTIs.

11. The user equipment according to claim 9 or 10, characterized in that the data packet is retransmitted at most twice.

12. The user equipment according to claim 9 or 10, characterized in that,

13. The user equipment according to claim 12, wherein the RTT between the first retransmission and the initial transmission is 16 TTIs, and the RTT between the second retransmission and the first retransmission is 12 TTIs. A ΤΉ.

14. The user equipment according to claim 9 or 10, characterized in that,

15. The user equipment as claimed in claim 14, characterized in that,

The RTT between the first retransmission and the initial transmission is 12 TTIs, and the RTT between the second retransmission and the first retransmission is 32 TTIs.

16. The user equipment according to claim 9, characterized in that the initially transmitted data packet adopts a bundling of 4 TTIs, the retransmitted data packet adopts a bundling of 16 TTIs, and the RTT of the retransmission and the initial transmission is for 24 TTIs.

17. A method for receiving uplink semi-statically scheduled SPS service data in a frequency division duplex FDD system, characterized in that the method includes:

Receive initially transmitted or retransmitted uplink semi-statically scheduled SPS service data packets bundled using the transmission time interval TTI; When it is detected that the data packet error is received, a retransmission indication is returned and the retransmitted data packet is received, wherein, while ensuring that the transmitted data does not collide, the TTI bundling size of the initially transmitted data packet and The TTI bundling size of the retransmitted data packet is different and/or the round-trip delay RTT between the initial transmission and the first retransmission is different from the RTT between two adjacent retransmissions.

18. The method of claim 17, wherein the RTT of two adjacent transmissions is at least 11 TTIs.

19. The method according to claim 17 or 18, characterized in that the data packet retransmitted twice at most is received.

20. The method according to claim 17 or 18, characterized in that,

21. The method of claim 20, characterized in that,

The RTT between the first retransmission and the initial transmission is 16 TTIs, and the RTT between the second retransmission and the first retransmission is 12 TTIs.

22. The method of claim 17 or 18, characterized in that,

23. The method of claim 22, characterized in that,

24. The method of claim 9, wherein the initially transmitted data packet adopts a bundling of 4 TTIs, the retransmitted data packet adopts a bundling of 16 TTIs, and the RTT of the retransmitted and initially transmitted is 24 TTIo

25. A base station, characterized in that the base station includes:

The receiving module is used to receive data packets bundled with the transmission time interval TTI for the uplink semi-statically scheduled SPS service initially transmitted or retransmitted by the user equipment; among which, while ensuring that the transmitted data does not collide, the initially transmitted The size of the TTI bundling of the data packet is different from the size of the TTI bundling of the retransmitted data packet and/or the round-trip delay RTT between the initial transmission and the first retransmission is different from the RTT between the two adjacent retransmissions; A processing module, configured to detect the data packet received by the receiving module, and when an error of the data packet is detected, send a retransmission instruction to the sending module; and

A sending module, configured to send the retransmission indication to the user equipment.

26. The base station of claim 25, wherein the RTT of two adjacent transmissions is at least 11 TTTs.

27. The base station according to claim 25 or 26, characterized in that the data packet is retransmitted twice at most.

28. The base station according to claim 25 or 26, characterized in that,

29. The base station as claimed in claim 28, characterized in that,

30. The base station according to claim 25 or 26, characterized in that,

31. The base station as claimed in claim 30, characterized in that,

32. The base station of claim 25, wherein the initially transmitted data packet adopts a bundling of 4 TTIs, the retransmitted data packet adopts a bundling of 16 TTIs, and the RTT of the retransmitted and initially transmitted is 24 TTIo