WO2016058469A1

WO2016058469A1 - Data transmission method and device

Info

Publication number: WO2016058469A1
Application number: PCT/CN2015/090051
Authority: WO
Inventors: 谌丽; 焦斌; 秦飞
Original assignee: 电信科学技术研究院
Priority date: 2014-10-17
Filing date: 2015-09-18
Publication date: 2016-04-21
Also published as: CN105577320A; CN105577320B

Abstract

Disclosed are a data transmission method and device, which are used for reducing, by using a new subframe of a smaller length, the transmission delay of data transmission caused when such kinds of new subframes are used. The data transmission method provided by the present invention comprises: determining a frame structure required in data transmission with a user equipment (UE), wherein the frame structure comprises at least one new subframe, the new subframe comprises n symbols, when the cyclic prefix (CP) comprised in the new subframe is a short CP, n<14, and when the CP comprised in the new subframe is a long CP, n<12; and performing data transmission with the UE according to the frame structure.

Description

Data transmission method and device

The present application claims priority to Chinese Patent Application No. 2014-1055511, the entire disclosure of which is hereby incorporated by reference. .

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background technique

The Long Term Evolution (LTE) system supports two types of frame structures, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

In the frame structure of the LTE FDD, each frame has a length of 10 ms, and is composed of 10 subframes of length 1 ms, and each subframe is composed of two slots having a length of 0.5 ms.

In the frame structure of TD-LTE, each frame has a length of 10 ms and is composed of two half frames of length 5 ms. In the case of a 5 ms switching point period, each half frame consists of four 1 ms regular subframes and one 1 ms special subframe configuration; in the case of a 10 ms switching point period, the first field consists of 4 1 ms regular subframes and 1 ms special subframe, and the second field consists of 5 1 ms regular subframes. Composition. A regular subframe consists of two time slots with a length of 0.5 ms; a special subframe consists of a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot ( Uplink Pilot Time Slot, UpPTS).

In the LTE system, scheduling and transmission are performed in units of subframes, that is, each scheduled data is transmitted on at least a time-frequency resource mapped to one subframe, which results in the lowest time of one-way transmission of the data packet. The delay is 1ms.

In order to ensure transmission reliability, the LTE system physical layer introduces a hybrid automatic retransmission (Hybrid-ARQ, HARQ) mechanism.

The following line transmission is taken as an example. The basic process of LTE system HARQ transmission includes:

Step 1: The base station schedules and sends a downlink data packet, and the UE receives the downlink data packet and processes the data packet;

Step 2: If the UE cannot correctly detect the downlink data packet, the NACK is fed back to the base station; the base station receives the uplink feedback signaling;

Step 3: The base station retransmits the data packet according to the UE feedback, and sends a downlink retransmission data packet; the UE receives the retransmission data packet;

Step 4: If the UE receives the ACK, the ACK is fed back to the base station. If the ACK is still not received correctly, repeat Step 2 to Step 3.

The physical block transmission has a single block error rate of 10% on average. To achieve a block error rate of 10-3, the average transmission needs to be transmitted three times, that is, two. Retransmission.

In the LTE FDD system, the delay interval of the initial transmission to the uplink feedback is t1=4 ms, and the delay interval of the uplink feedback to the retransmission is t2=4 ms, that is, the HARQ round trip time (RTT)=8 ms. In the LTE TDD system, the HARQ RTT varies according to the uplink and downlink subframe configuration, and is 10 ms to 15 ms.

It can be seen that to achieve a block error rate of 10-3, only the physical layer delay averages 16 to 30 ms.

In summary, the minimum unidirectional transmission delay of the current LTE frame structure is 1 ms. After the HARQ mechanism is introduced to ensure transmission reliability, high reliability is achieved, and the average physical layer transmission time is extended by 16 to 30 ms. Therefore, the LTE frame structure in the prior art causes a long transmission delay and cannot meet the higher requirements of future transmission delay.

Summary of the invention

The embodiment of the invention provides a data transmission method and device for reducing the transmission delay of data transmission using the novel subframe by adopting a new type of subframe with a smaller length.

A data transmission method provided by an embodiment of the present invention includes:

Determining a frame structure to be used for data transmission with the user equipment UE; wherein the frame structure includes at least one new type of subframe, the new subframe includes n symbols, and the cyclic prefix CP included in the new subframe is When short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

Data transmission is performed between the UE and the UE according to the frame structure.

A new type of sub-frame with a smaller length provided by the method can perform fast data transmission and reduce delay.

Preferably, the frame structure that needs to be adopted when performing data transmission with the user equipment UE includes:

In the LTE system frame structure, a part of the subframe is used as an extended subframe, and the extended subframe includes a plurality of new subframes, and the uplink and downlink configurations of the multiple new subframes are determined.

Therefore, the new subframe proposed in the embodiment of the present invention can be compatible with the existing LTE system by extending the frame structure of the existing LTE system.

Preferably, a start point of the first new subframe in the extended subframe is aligned with a start point of the extended subframe;

Alternatively, a first guard interval is set between a start point of the first new subframe in the extended subframe and a start point of the extended subframe. Thereby, the conversion between the existing LTE subframe and the new subframe can be implemented by the first guard interval.

Preferably, when the end point of the last new subframe in the extended subframe cannot be aligned with the end point of the extended subframe, the end point of the last new subframe in the extended subframe and the extended subframe A second guard interval is set between the end points. Therefore, the conversion between the existing LTE subframe and the new subframe can also be implemented by the second guard interval.

For the non-long-term evolution LTE system compatible carrier, the length of the new subframe in each frame and the uplink and downlink configuration of the new subframe are determined according to the service data transmission requirement and/or the capability information reported by the UE.

Preferably, new sub-frames of various lengths are included in the same frame. Therefore, the configuration of the subframe length is more flexible, and is suitable for more transmission requirements.

Preferably, in the frame structure, the downlink new subframe and the uplink new subframe are arranged at intervals. Thereby, the fastest feedback subframe can be set as the reverse direction subframe for feedback data transmission.

Preferably, the method further comprises:

Notifying the UE of the subframe configuration information of the new subframe. Therefore, the UE can learn the subframe configuration information of the new subframe, determine the subframe structure of the new subframe, and then use the new subframe to perform corresponding data transmission.

Preferably, the method further comprises:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE. Therefore, the new sub-frame length can be matched, and the new sub-frame length adjustment can be performed at any time according to the data transmission amount and the delay requirement, so that the latest new sub-frame can be used for data transmission at any time.

Preferably, the method further comprises:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed.

Thereby, the feedback retransmission delay of the novel subframe can be minimized.

Another data transmission method provided by the present invention includes:

The user equipment UE determines a frame structure to be used when performing data transmission with the network side, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, and the cyclic prefix included in the new subframe When CP is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

The UE performs data transmission between the frame structure and the network side.

Therefore, the UE can perform fast data transmission and reduce delay by using the new subframe in the method.

Preferably, the UE determines a frame structure to be used when performing data transmission with the network side, including:

Receiving, by the UE, subframe configuration information of a new subframe sent by the network side;

The UE determines, according to the subframe configuration information of the new subframe sent by the network side, a frame structure that needs to be adopted when performing data transmission with the network side.

Preferably, before the determining, by the UE, the frame structure that needs to be used for data transmission on the network side, the method further includes:

The UE reports its own capability information to the network side. Therefore, the network side can perform reasonable configuration by referring to the capability information of the UE when performing the new subframe configuration.

Preferably, the method further comprises:

Receiving, by the UE, the subframe configuration information that is adjusted by the network side and configured to adjust subframe configuration information of the new subframe interest;

The UE re-determines a frame structure that needs to be adopted when performing data transmission with the network side according to the adjusted subframe configuration information;

And the UE performs data transmission between the network side and the network side according to the frame structure that is required to perform data transmission with the network side.

Therefore, the new sub-frame length can be matched, and the new sub-frame length adjustment can be performed at any time according to the data transmission amount and the delay requirement, so that the latest new sub-frame can be used for data transmission at any time.

Preferably, the method further comprises:

The UE uses the next new subframe at the end of the data transmission process as a feedback subframe, and feeds back the data transmission processing result; and/or,

The UE sets the next new subframe after processing the feedback signaling to a retransmission subframe whose transmission direction is the same as the initial transmission direction, and performs data retransmission.

A data transmission apparatus provided by an embodiment of the present invention includes:

a frame structure determining unit, configured to determine a frame structure to be used when performing data transmission with the user equipment UE, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, when the new subframe When the cyclic prefix CP included in the short subframe is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

And a transmitting unit, configured to perform data transmission with the UE according to the frame structure.

Preferably, the frame structure determining unit is specifically configured to:

Alternatively, a first guard interval is set between a start point of the first new subframe in the extended subframe and a start point of the extended subframe.

Preferably, when the end point of the last new subframe in the extended subframe cannot be aligned with the end point of the extended subframe, the end point of the last new subframe in the extended subframe and the extended subframe A second guard interval is set between the end points.

Preferably, the frame structure determining unit is specifically configured to:

Preferably, new sub-frames of various lengths are included in the same frame.

Preferably, in the frame structure, the downlink new subframe and the uplink new subframe are arranged at intervals.

Preferably, the transmitting unit is further configured to: notify the UE of subframe configuration information of the new subframe.

Preferably, the transmission unit is further configured to:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE.

Preferably, the transmission unit is further configured to:

Another data transmission device provided by the embodiment of the present invention includes:

a frame structure determining unit, configured to determine a frame structure to be used when performing data transmission with the network side, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, in the new subframe When the cyclic prefix CP included is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

And a transmitting unit, configured to perform data transmission between the frame structure and the network side.

Preferably, the frame structure determining unit is specifically configured to:

Receiving subframe configuration information of a new subframe sent by the network side;

Determining, according to the subframe configuration information of the new subframe sent by the network side, a frame structure that needs to be adopted when performing data transmission with the network side.

Preferably, the transmitting unit is further configured to report the capability information of the UE where the device is located to the network side before the frame structure determining unit determines the frame structure to be used for performing data transmission with the network side.

Preferably, the transmission unit is further configured to:

Receiving, by the network side, subframe configuration information that is adjusted by using subframe configuration information of a new subframe;

Determining, according to the adjusted subframe configuration information, a frame structure that needs to be adopted when performing data transmission with the network side;

Performing data transmission between the network side and the network side according to the frame structure that is required to be used for data transmission with the network side.

Preferably, the transmission unit is further configured to:

A processor, a program for reading the memory, performs the following process:

Determining a frame structure to be used when performing data transmission with the user equipment UE; wherein the frame structure includes One new sub-frame, the new sub-frame includes n symbols, when the cyclic prefix CP included in the new sub-frame is a short CP, n<14; when the CP included in the new sub-frame is a long CP, n <12;

Data transmission is performed between the transceiver and the UE according to the frame structure.

A transceiver for receiving and transmitting data under the control of a processor.

Preferably, when the processor determines the frame structure to be used for data transmission with the user equipment UE, the specific use is:

Preferably, when the processor determines the frame structure to be used for data transmission with the user equipment UE, the method is further configured to:

Preferably, a new type of subframe of various lengths is included in the same frame.

Preferably, the processor is further configured to:

The subframe configuration information of the new subframe is notified to the UE by the transceiver.

Preferably, the processor is further configured to:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE by the transceiver.

Preferably, the processor is further configured to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back through the transceiver; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed by the transceiver.

A processor for reading a program in the memory, performing the following process:

Determining a frame structure to be used when performing data transmission with the network side; wherein the frame structure includes at least one a new type of subframe, the new subframe includes n symbols, when the cyclic prefix CP included in the new subframe is a short CP, n<14; when the CP included in the new subframe is a long CP, n< 12;

Data transmission is performed between the transceiver and the network side according to the frame structure.

Preferably, when the processor determines the frame structure to be used for data transmission with the network side, the specific use is:

Receiving, by the transceiver, subframe configuration information of the new subframe sent by the network side;

Preferably, before the processor determines the frame structure to be used for data transmission with the network side, the processor is further configured to:

The capability information of the UE where the device is located is reported by the transceiver to the network side.

Preferably, the processor is further configured to:

Receiving, by the transceiver, the subframe configuration information that is adjusted by the network side and configured to adjust the subframe configuration information of the new subframe;

According to the frame structure that needs to be used for data transmission with the network side, data transmission is performed between the transceiver and the network side.

Preferably, the processor is further configured to:

DRAWINGS

1 is a schematic flowchart of a data transmission method on a network side according to an embodiment of the present invention;

2 is a schematic diagram of a configuration of a new subframe for a compatible carrier of an LTE system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a configuration of a new subframe for a non-LTE system compatible carrier according to an embodiment of the present disclosure;

4 is a schematic flowchart of a data transmission method on a UE side according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an uplink and downlink configuration of a novel subframe according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a data transmission apparatus on a network side according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a data transmission apparatus on a UE side according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another data transmission apparatus on the network side according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another data transmission apparatus on the UE side according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should be understood that, in the embodiment of the present invention, user equipment (UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), and a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" The telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.

The technical solution provided by the embodiment of the present invention can solve the transmission delay limitation caused by the subframe in which the basic scheduling unit is 1 ms in the LTE system. The transmission delay is reduced from the basic structure to meet the 5G air interface transmission delay requirement.

Referring to FIG. 1 , on the network side, specifically, for example, on the base station side, a data transmission method provided by an embodiment of the present invention includes the following steps:

S101. Determine a frame structure to be used when performing data transmission with the user equipment UE. The frame structure includes at least one new type of subframe, where the new subframe includes n symbols, and the cyclic prefix included in the new subframe. When CP is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

S102. Perform data transmission with the UE according to the frame structure.

The novel subframe structure proposed in the embodiment of the present invention has a variable subframe length, and the new subframe length is n symbols. The design method of the new sub-frame occupying the number of symbols n is:

When the CP included in the new subframe is a short CP (which may also be referred to as a regular CP), n<14;

When the CP included in the new subframe is a long CP (which may also be referred to as an extended CP), n<12.

In the embodiment of the present invention, the length of the new subframe is represented by the number of occupied symbols. For example, if the length of the new subframe is 3, it indicates 3 symbols occupied by the new subframe.

Preferably, in order to avoid wasting resources and improving resource utilization:

When the CP included in the new subframe is a short CP, n is a common divisor of 14;

When the CP included in the new subframe is a long CP, n is a common divisor of 12.

E.g:

When the CP included in the new subframe is a short CP, n is 1, 2, or 7;

When the CP included in the new subframe is a long CP, n is 1, 2, 3, 4, or 6.

For the long-term evolution LTE system compatible carrier (the network side can know which carriers are LTE system compatible carriers), in the LTE system frame structure, a partial subframe is used as an extended subframe, and the extended subframe includes multiple new subframes. And determining an uplink and downlink configuration of the plurality of new subframes.

Specifically, for an LTE system compatible carrier, the frame structure is designed as follows:

The new sub-frame design method compatible with the LTE system is:

In the LTE frame structure, a partial subframe (1 ms) is set as an extended subframe, and an extended subframe time domain position is used to configure a new subframe, and a plurality of new subframes are included in one LTE extended subframe duration, and are consecutively arranged.

The first new subframe start point in the LTE extended subframe is aligned with the original LTE subframe, or a first guard interval GP1 is reserved for conversion between the legacy LTE subframe and the new subframe;

If the new subframes in the LTE extended subframe (1 ms) are consecutively arranged, the remaining duration is not enough to accommodate a new subframe, that is, the end point of the last new subframe in the extended subframe cannot be aligned with the end of the extended subframe. And then the remaining duration is taken as the second guard interval GP2; and, preferably, due to being between the two subframes (which may be the first of the last new subframe and the next extended subframe in the current extended subframe) Between new sub-frames, it can also be current expansion GP2 is already set between the last new subframe in the subframe and the next original LTE subframe. Therefore, the GP2 is the first new subframe or the original LTE in the next extended subframe. The starting point of the frame is aligned with the starting point of the next original LTE subframe subsequent to the GP2; of course, it is also possible to continuously set a guard interval after the GP2, but it is not necessary.

Referring to FIG. 2, the LTE subframe 2 is configured as an extended subframe, and is used to accommodate a new type of subframe, and the extended subframe may be a downlink subframe or an uplink subframe. The new subframe 0' starting point is aligned with the extended subframe 2 starting point; in the extended subframe 2, there are three new subframes, namely, a new subframe 0', a new subframe 1', a new subframe 2', and a new subframe 2 The duration between the end point of 'and the end point of the extended subframe 2 is set to the second guard interval GP2 for the new subframe and the legacy LTE subframe conversion, specifically, for the new subframe 2' and the LTE subframe 3 Conversion. For example, an LTE subframe occupies 14 symbols, a new subframe occupies 4 symbols, and 1 ms has three new subframes, and GP2 occupies 2 symbols.

Under this structure, there are traditional LTE 1ms subframes and new subframes with multiple subframe lengths. The traditional LTE UE performs data scheduling and transmission only on the LTE subframe, and the UE (hereinafter referred to as the new UE) can perform data scheduling and transmission on the LTE subframe or on the new subframe for a specific low delay requirement. The ability to handle multiple sub-frame lengths.

Preferably, for the non-long-term evolution LTE system compatible carrier, determining a frame structure to be used for data transmission with the user equipment UE, including:

Specifically, for a non-LTE system compatible carrier (the network side can know which carriers are non-LTE system compatible carriers), its frame structure design is as shown in FIG. 3, where k is greater than or equal to 2.

For a non-LTE system compatible carrier, only the new UE works, and the system sets the new subframe length and notifies the UE according to the data transmission requirement and/or the capability information reported by the UE, including the delay and the data volume requirement. In order to accommodate different types of UEs, the new subframe length may also include multiple types, for example, including a new type of subframe having a length of 3 symbols and 7 symbols, see FIG. 3, for example, at the first 1 ms, the value of k is 2. In the second 1ms, k takes the value 3. That is, for different UEs, the value of k may be different; for the same UE, k may also have multiple values, that is, the values of k may be different in different time periods.

Therefore, preferably, a new type of subframe of a plurality of lengths is included in the same frame. Therefore, the configuration of the subframe length is more flexible, and is suitable for more transmission requirements.

In addition, similarly, the frame structure of each frame may be the same or different.

Preferably, the method further comprises:

Notifying the UE of the subframe configuration information of the new subframe, for example, by using a broadcast message or a dedicated Radio Resource Control (RRC) signaling manner, notifying the subframe configuration information of the new subframe UE. Therefore, the UE can learn the subframe configuration information of the new subframe, determine the subframe structure of the new subframe, and then use the new subframe to perform corresponding data transmission.

Preferably, the subframe configuration information of the new subframe according to the embodiment of the present invention includes the length of the new subframe and the uplink and downlink subframe configuration information.

Preferably, the method further comprises:

Correspondingly, referring to FIG. 4, on the UE side, another data transmission method provided by the present invention includes the following steps:

S201. The user equipment UE determines a frame structure that needs to be adopted when performing data transmission with the network side. The frame structure includes at least one new type of subframe, where the new subframe includes n symbols, and is included in the new subframe. When the cyclic prefix CP is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

S202. The UE performs data transmission between the frame structure and the network side.

Preferably, the method further comprises:

Receiving, by the UE, subframe configuration information that is adjusted by using the subframe configuration information of the new subframe sent by the network side;

Preferably, the method further comprises:

A detailed description of the four embodiments is given below.

Embodiment 1: A non-LTE system compatible carrier enables a new subframe.

For a specific low-latency demand UE (hereinafter referred to as a new type of UE), for example, a Machine Type Communication (MTC) UE with high latency requirements, adopting a new subframe on a new carrier (ie, a non-LTE system compatible carrier) The structure (for example, the frame structure shown in FIG. 3) performs data transmission, and the specific process includes:

Step 1: The new UE initiates an initial access process to the network, and reports the capability information of the UE.

Step 2: The network side device (specifically, the base station) that supports the non-LTE system compatible carrier of the new subframe receives the UE access request, and obtains the capability information of the UE from the UE to determine the UE capability.

Step 3: The network side device supporting the non-LTE system compatible carrier of the new subframe transmits the subframe configuration information of the new subframe to the UE when accessing the new UE, including the subframe length of the new subframe (the number of symbols included) And the configuration of the uplink and downlink subframes of the new subframe, complete the new subframe configuration. Subsequent transmission and scheduling can be performed in a new subframe configuration mode (subframe length, uplink and downlink subframe configuration, etc.).

The subframe configuration information may further include subframe information used by the UE to feed back the data transmission result, for example, a subframe number of a subframe used by the UE to feed back a NACK or ACK message.

Embodiment 2: The LTE system compatible carrier enables a new subframe.

The specific data transmission process includes:

Step 1: The base station compatible with the LTE carrier works according to the LTE frame structure and configures the subframe parameters. When a new type of subframe needs to be configured, for example, when determining that the current network is a private network with a high transmission speed, such as 5G, or when a service with a high transmission speed is required, or when the UE initiates a request for configuring a new subframe. And configuring the LTE subframe to be an extended subframe, where the extended subframe includes multiple new subframes, the extended subframe may be a downlink subframe or an uplink subframe, and the base station compatible with the LTE carrier uses a broadcast message or a dedicated The radio resource control (RRC) signaling method notifies the UE of the subframe configuration information of the new subframe.

Step 2: The behaviors of the LTE UE and the new UE are:

The LTE UE receives the subframe configuration information of the new subframe, that is, the configuration information of the LTE extended subframe, and does not perform data scheduling and transmission on the extended subframe (for a UE capable of parsing extended subframe configuration signaling), or LTE The UE receives the scheduling and transmission in the LTE subframe mode on the extended subframe, but the LTE UE cannot receive any correct scheduling command and data transmission because it is not transmitted in the LTE subframe mode (applicable to the inability to parse the extended subframe configuration signaling) UE);

The new UE further receives the subframe configuration information of the new subframe, for example, including the subframe length, the CP, the GP length, the subframe transmission direction, and the like, and determines the new subframe configuration according to the subframe configuration information of the new subframe, specifically Determine the subframe number of the extended subframe, and determine the number and length of the new subframes in the extended subframe, and the CP, the GP length, and the uplink and downlink configurations of each new subframe.

Subsequently, the base station and the UE perform data scheduling and transmission in the extended subframe according to the new subframe configuration, and perform data scheduling and transmission in the legacy LTE subframe according to the LTE subframe configuration.

Embodiment 3: The new subframe length can be matched.

The data transmission process specifically includes:

Step 1: The system sets a variety of new sub-frame lengths. For example, under long CP, set 2, 3, 4, and 6 symbol numbers for a total of 4 new sub-frame lengths. A variety of new subframe configuration options may be notified by the network side to the UE, or may be solidified in the base station and UE storage;

Step 2: The amount of data that the network side needs to transmit according to actual needs, for example, a relatively fixed packet size range for a specific MTC UE, according to a fast transmission principle, for example, a downlink or uplink data packet can be transmitted at a time, and a new type of subframe actually needed is designed. length;

Step 3: The network side performs a new subframe configuration for data transmission, and notifies the UE of the subframe configuration information of the new subframe by using broadcast or dedicated signaling (air interface RRC signaling or non-access layer signaling);

Step 4: The network side performs a new subframe length adjustment according to the data transmission amount and the delay requirement. When the new subframe length change needs to be performed, the subframe configuration information of the adjusted new subframe is broadcasted or dedicated signaling ( The air interface RRC signaling or non-access stratum signaling) informs the UE.

The behavior process of the UE corresponds to the network side, and details are not described herein again.

Embodiment 4: Feedback retransmission delay of a new subframe.

In order to improve the delay performance, the transmission direction of the new subframe may not be consistent with the original LTE extended subframe direction. For example, referring to FIG. 5, the transmission direction of the LTE subframe 1 is downlink, but in the embodiment of the present invention, the subframe is used as the delay. The extended sub-frame includes three new sub-frames, namely, a new sub-frame 0', a new sub-frame 1', and a new sub-frame 2', wherein the transmission direction of the new sub-frame 0' and the new sub-frame 2' is downlink. The transmission direction of the new subframe 1' is uplink, and the second guard interval GP2 is between the end of the new subframe 2' and the end of the LTE subframe 1. Similarly, the transmission direction of the LTE subframe 2 is downlink, but in the embodiment of the present invention, the subframe is used as an extended subframe, and includes three new subframes, namely, a new subframe 3′ and a new subframe 4′. The new subframe 5', wherein the transmission direction of the new subframe 3' and the new subframe 5' is uplink, and the transmission direction of the new subframe 4' is downlink, the end point of the new subframe 5' to the end of the LTE subframe 2. There is a second guard interval between GP2.

On the premise that the processing power of the base station and the UE is improved, the possible fastest feedback subframe is set as the reverse direction subframe for feedback, for example, the downlink new subframe and the uplink new subframe are continuously spaced. As shown in FIG. 5, if both the base station and the UE can perform data processing and generate feedback in a new type of subframe, the uplink and downlink configurations of the new subframe are configured as uplink and downlink new subframe spacing configurations. For example, the downlink packet 1 transmission is performed in the new subframe 0', the feedback is performed in the new subframe 1', and the first retransmission is performed in the new subframe 2'.

Therefore, in the embodiment of the present invention, the delay of the feedback and the retransmission subframe is proposed: under the premise that the processing capability of the base station and the UE is improved, the possible fastest feedback subframe is set as the reverse subframe for feedback; The fastest possible retransmission subframe after the feedback subframe is set to the subframe in the same direction as the initial transmission. E.g:

Referring to FIG. 6, on the network side, a data transmission apparatus according to an embodiment of the present invention includes:

The frame structure determining unit 11 is configured to determine a frame structure that needs to be adopted when performing data transmission with the user equipment UE, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, when the new type of subframe When the cyclic prefix CP included in the frame is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

The transmitting unit 12 is configured to perform data transmission with the UE according to the frame structure.

Preferably, the frame structure determining unit 11 is specifically configured to:

Preferably, new sub-frames of various lengths are included in the same frame.

Preferably, the transmission unit 12 is further configured to:

Preferably, the data transmission device can be a base station.

Referring to FIG. 7, on the UE side, another data transmission apparatus provided by an embodiment of the present invention includes:

The frame structure determining unit 21 is configured to determine a frame structure that needs to be adopted when performing data transmission with the network side, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, when the new subframe When the cyclic prefix CP included in the short subframe is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

The transmitting unit 22 is configured to perform data transmission between the frame structure and the network side.

Preferably, the frame structure determining unit 21 is specifically configured to:

Preferably, the transmitting unit 22 is further configured to report the capability information of the UE where the device is located to the network side before the frame structure determining unit determines the frame structure to be used for performing data transmission with the network side. .

Preferably, the transmission unit 22 is further configured to:

Referring to FIG. 8, on the network side, another data transmission apparatus provided by an embodiment of the present invention includes:

The processor 500 is configured to read a program in the memory 520 and perform the following process:

Data transmission is performed between the UE and the UE via the transceiver 510 in accordance with the frame structure.

The transceiver 510 is configured to receive and transmit data under the control of the processor 500.

When the processor 500 determines the frame structure that needs to be used for data transmission with the user equipment UE, it is specifically used to:

The starting point of the first new subframe in the extended subframe is aligned with the starting point of the extended subframe;

When the end point of the last new subframe in the extended subframe cannot be aligned with the end point of the extended subframe, the end point of the last new subframe in the extended subframe is set between the end point of the extended subframe and the extended subframe. There is a second guard interval.

When the processor 500 determines the frame structure that needs to be used for data transmission with the user equipment UE, it is also specifically used to:

New sub-frames of various lengths are included in the same frame.

In the frame structure, the downlink new subframe and the uplink new subframe are arranged at intervals.

The processor 500 is also used to:

The subframe configuration information of the new subframe is notified to the UE by the transceiver 510.

The processor 500 is also used to:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE by the transceiver 510.

The processor 500 is also used to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back through the transceiver 510; and/or,

The next new subframe after the processing of the feedback signaling is set as the retransmission subframe whose transmission direction is the same as the initial transmission direction, and the data is retransmitted by the transceiver 510.

Here, in FIG. 8, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The transceiver 510 can be a plurality of components, including a transmitter and a transceiver, provided for transmission

A unit on the medium that communicates with various other devices. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.

Preferably, the data transmission device can be a base station.

Referring to FIG. 9, on the UE side, another data transmission apparatus provided by an embodiment of the present invention includes:

The processor 600 is configured to read a program in the memory 620 and perform the following process:

Determining a frame structure to be used for data transmission with the network side; wherein the frame structure includes at least one new type of subframe, the new subframe includes n symbols, and the cyclic prefix CP included in the new subframe is short For CP, n<14; when the CP included in the new subframe is a long CP, n<12;

Data transmission is performed between the transceiver 610 and the network side in accordance with the frame structure.

The transceiver 610 is configured to receive and transmit data under the control of the processor 600.

When the processor 600 determines the frame structure that needs to be used for data transmission with the network side, it is specifically used to:

Receiving, by the transceiver 610, subframe configuration information of a new subframe sent by the network side;

The processor 600 is also used to: before determining the frame structure to be used for data transmission with the network side:

The capability information of the UE where the device is located is reported by the transceiver 610 to the network side.

The processor 600 is also used to:

Receiving, by the transceiver 610, the subframe configuration information that is adjusted by the network side and configured to adjust the subframe configuration information of the new subframe;

According to the frame structure that needs to be used for data transmission with the network side, data transmission is performed between the transceiver 610 and the network side.

The processor 600 is also used to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back through the transceiver 610; and/or,

The next new subframe after the processing of the feedback signaling is set as the retransmission subframe whose transmission direction is the same as the initial transmission direction, and the data retransmission is performed by the transceiver 610.

Here, in FIG. 9, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The transceiver 610 can be a plurality of components, including a transmitter and a receiver, for providing communication with various other devices on a transmission medium. unit. For different user equipments, the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.

The data transmission device on the network side described in the foregoing embodiments of the present invention may be a base station and a relay node, where the base station includes a macro base station (Macro), a micro base station (Micro), a pico base station (Pico), and a home. A base station or a femto base station (Femto) or the like, and other possible wireless access points (APs) employing a TDD mode.

In summary, the embodiment of the present invention reduces the transmission delay of data transmission using the novel subframe by providing a new type of subframe with a smaller length.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the invention. The spirit and scope of the example. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A data transmission method, characterized in that the method comprises:

Determining a frame structure to be used for data transmission with the user equipment UE; wherein the frame structure includes at least one new type of subframe, the new subframe includes n symbols, and the cyclic prefix CP included in the new subframe is When short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

Data transmission is performed between the UE and the UE according to the frame structure.
The method according to claim 1, wherein determining a frame structure to be used for data transmission with the user equipment UE comprises:

In the LTE system frame structure, a part of the subframe is used as an extended subframe, and the extended subframe includes a plurality of new subframes, and the uplink and downlink configurations of the multiple new subframes are determined.
The method according to claim 2, wherein a starting point of the first new subframe in the extended subframe is aligned with a starting point of the extended subframe;

Alternatively, a first guard interval is set between a start point of the first new subframe in the extended subframe and a start point of the extended subframe.
The method according to claim 3, wherein when the end point of the last new subframe in the extended subframe cannot be aligned with the end point of the extended subframe, the last new child in the extended subframe A second guard interval is set between the end point of the frame and the end point of the extended subframe.
The method according to claim 1, wherein determining a frame structure to be used for data transmission with the user equipment UE comprises:

For the non-long-term evolution LTE system compatible carrier, the length of the new subframe in each frame and the uplink and downlink configuration of the new subframe are determined according to the service data transmission requirement and/or the capability information reported by the UE.
The method according to claim 5, characterized in that the novel subframes of various lengths are included in the same frame.
The method according to claim 1, wherein in the frame structure, the downlink new subframe and the uplink new subframe are arranged at intervals.
The method of any of claims 1-7, further comprising:

Notifying the UE of the subframe configuration information of the new subframe.
The method of claim 8 further comprising:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE.
The method of claim 1 further comprising:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed.
A data transmission method, characterized in that the method comprises:

The user equipment UE determines a frame structure to be used when performing data transmission with the network side, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, and the cyclic prefix included in the new subframe When CP is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

The UE performs data transmission between the frame structure and the network side.
The method according to claim 11, wherein the UE determines a frame structure to be used for data transmission with the network side, including:

Receiving, by the UE, subframe configuration information of a new subframe sent by the network side;

The UE determines, according to the subframe configuration information of the new subframe sent by the network side, a frame structure that needs to be adopted when performing data transmission with the network side.
The method according to claim 11 or 12, wherein before the UE determines a frame structure to be used for data transmission on the network side, the method further includes:

The UE reports its own capability information to the network side.
The method of claim 11 further comprising:

Receiving, by the UE, subframe configuration information that is adjusted by using the subframe configuration information of the new subframe sent by the network side;

The UE re-determines a frame structure that needs to be adopted when performing data transmission with the network side according to the adjusted subframe configuration information;

And the UE performs data transmission between the network side and the network side according to the frame structure that is required to perform data transmission with the network side.
The method of claim 11 further comprising:

The UE uses the next new subframe at the end of the data transmission process as a feedback subframe, and feeds back the data transmission processing result; and/or,

The UE sets the next new subframe after processing the feedback signaling to a retransmission subframe whose transmission direction is the same as the initial transmission direction, and performs data retransmission.
A data transmission device, characterized in that the device comprises:

a frame structure determining unit, configured to determine a frame structure to be used when performing data transmission with the user equipment UE, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, when the new subframe When the cyclic prefix CP included in the short subframe is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

And a transmitting unit, configured to perform data transmission with the UE according to the frame structure.
The apparatus according to claim 16, wherein the frame structure determining unit is specifically configured to:

In the LTE system frame structure, a part of the subframe is used as an extended subframe, and the extended subframe includes a plurality of new subframes, and the uplink and downlink configurations of the multiple new subframes are determined.
The apparatus according to claim 17, wherein a starting point of a first new type of subframe in the extended subframe is aligned with a starting point of the extended subframe;

Alternatively, a first guard interval is set between a start point of the first new subframe in the extended subframe and a start point of the extended subframe.
The apparatus according to claim 18, wherein when the end point of the last new sub-frame in the extended sub-frame is not aligned with the end point of the extended sub-frame, the last new sub-frame in the extended sub-frame A second guard interval is set between the end point of the frame and the end point of the extended subframe.
The apparatus according to claim 16, wherein the frame structure determining unit is specifically configured to:

For the non-long-term evolution LTE system compatible carrier, the length of the new subframe in each frame and the uplink and downlink configuration of the new subframe are determined according to the service data transmission requirement and/or the capability information reported by the UE.
The apparatus according to claim 20, wherein the new frame of the plurality of lengths is included in the same frame.
The apparatus according to claim 16, wherein in the frame structure, the downlink new subframe and the uplink new subframe are arranged at intervals.
The apparatus according to any one of claims 16 to 22, wherein the transmitting unit is further configured to: notify the UE of subframe configuration information of a new subframe.
The device according to claim 23, wherein the transmission unit is further configured to:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE.
The device according to claim 16, wherein the transmission unit is further configured to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed.
A data transmission device, characterized in that the device comprises:

a frame structure determining unit, configured to determine a frame structure to be used when performing data transmission with the network side, where the frame structure includes at least one new type of subframe, where the new subframe includes n symbols, in the new subframe When the cyclic prefix CP included is a short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

And a transmitting unit, configured to perform data transmission between the frame structure and the network side.
The apparatus according to claim 26, wherein the frame structure determining unit is specifically configured to:

Receiving subframe configuration information of a new subframe sent by the network side;

Determining, when the data transmission is performed with the network side, according to the subframe configuration information of the new subframe sent by the network side. The frame structure that needs to be used.
The device according to claim 26 or 27, wherein the transmitting unit is further configured to report the device before the frame structure determining unit determines a frame structure to be used for data transmission with the network side. The capability information of the UE is given to the network side.
The device according to claim 26, wherein the transmission unit is further configured to:

Receiving, by the network side, subframe configuration information that is adjusted by using subframe configuration information of a new subframe;

Determining, according to the adjusted subframe configuration information, a frame structure that needs to be adopted when performing data transmission with the network side;

Performing data transmission between the network side and the network side according to the frame structure that is required to be used for data transmission with the network side.
The device according to claim 26, wherein the transmission unit is further configured to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed.
A data transmission device, comprising:

A processor, a program for reading the memory, performs the following process:

Determining a frame structure to be used for data transmission with the user equipment UE; wherein the frame structure includes at least one new type of subframe, the new subframe includes n symbols, and the cyclic prefix CP included in the new subframe is When short CP, n<14; when the CP included in the new subframe is a long CP, n<12;

Data transmission is performed between the transceiver and the UE according to the frame structure.

A transceiver for receiving and transmitting data under the control of a processor.
The apparatus according to claim 31, wherein when the processor determines a frame structure to be used for data transmission with the user equipment UE, the method is specifically configured to:

In the LTE system frame structure, a part of the subframe is used as an extended subframe, and the extended subframe includes a plurality of new subframes, and the uplink and downlink configurations of the multiple new subframes are determined.
The apparatus according to claim 32, wherein a starting point of a first new type of subframe in the extended subframe is aligned with a starting point of the extended subframe;

Alternatively, a first guard interval is set between a start point of the first new subframe in the extended subframe and a start point of the extended subframe.
The apparatus according to claim 33, wherein when the end point of the last new subframe in the extended subframe is not aligned with the end point of the extended subframe, the last new child in the extended subframe A second guard interval is set between the end point of the frame and the end point of the extended subframe.
The apparatus according to claim 31, wherein when the processor determines a frame structure to be used for data transmission with the user equipment UE, the method is further configured to:

For the non-long-term evolution LTE system compatible carrier, the length of the new subframe in each frame and the uplink and downlink configuration of the new subframe are determined according to the service data transmission requirement and/or the capability information reported by the UE.
The apparatus of claim 35, wherein the new frame of the plurality of lengths is included in the same frame.
The apparatus according to claim 31, wherein in the frame structure, the downlink new subframe and the uplink new subframe are arranged at intervals.
The device according to any one of claims 31 to 37, wherein the processor is further configured to:

The subframe configuration information of the new subframe is notified to the UE by the transceiver.
The device according to claim 38, wherein the processor is further configured to:

The subframe configuration information of the new subframe is adjusted according to the data transmission amount and the delay requirement, and the adjusted subframe configuration information is notified to the UE by the transceiver.
The device according to claim 31, wherein the processor is further configured to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back through the transceiver; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed by the transceiver.
A data transmission device, comprising:

A processor for reading a program in the memory, performing the following process:

Determining a frame structure to be used for data transmission with the network side; wherein the frame structure includes at least one new type of subframe, the new subframe includes n symbols, and the cyclic prefix CP included in the new subframe is short For CP, n<14; when the CP included in the new subframe is a long CP, n<12;

Data transmission is performed between the transceiver and the network side according to the frame structure.

A transceiver for receiving and transmitting data under the control of a processor.
The device according to claim 41, wherein when the processor determines a frame structure to be used for data transmission on the network side, the method is specifically configured to:

Receiving, by the transceiver, subframe configuration information of the new subframe sent by the network side;

Determining, according to the subframe configuration information of the new subframe sent by the network side, a frame structure that needs to be adopted when performing data transmission with the network side.
The apparatus according to claim 41 or 42, wherein the processor is further configured to: before determining a frame structure to be used for data transmission with the network side:

The capability information of the UE where the device is located is reported by the transceiver to the network side.
The device according to claim 41, wherein the processor is further configured to:

Receiving, by the transceiver, the subframe configuration information that is adjusted by the network side and configured to adjust the subframe configuration information of the new subframe;

Determining, according to the adjusted subframe configuration information, a frame structure that needs to be adopted when performing data transmission with the network side;

According to the frame structure that needs to be used for data transmission with the network side, data transmission is performed between the transceiver and the network side.
The device according to claim 41, wherein the processor is further configured to:

The next new subframe at the end of the data transmission process is used as a feedback subframe, and the data transmission processing result is fed back through the transceiver; and/or,

The next new subframe after processing the feedback signaling is set as a retransmission subframe whose transmission direction is the same as the initial transmission direction, and data retransmission is performed by the transceiver.