CN107306452B

CN107306452B - Data transmission method, user equipment and network equipment

Info

Publication number: CN107306452B
Application number: CN201610255933.4A
Authority: CN
Inventors: 龚政委
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-04-22
Filing date: 2016-04-22
Publication date: 2021-06-01
Anticipated expiration: 2036-04-22
Also published as: WO2017181992A1; CN107306452A

Abstract

The embodiment of the invention provides a data transmission method, which comprises the following steps: the network equipment receives uplink random access request signals from at least one user equipment in a first time window, determines load indication information according to the number of the uplink random access request signals received in the first time window, and sends the load indication information to the at least one user equipment. And the user equipment determines a second time window for subsequently sending the uplink data, determines a sending resource in the second time window according to the load indication information, and sends the uplink data to the network equipment on the sending resource. In the method of the embodiment of the invention, each user equipment determines the sending resource of the uplink data according to the load indication information, and can dynamically allocate the data channel resource, thereby avoiding the conflict among a plurality of UE, improving the utilization rate of the resource and further improving the transmission efficiency.

Description

Data transmission method, user equipment and network equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method, a user equipment, and a network device.

Background

At present, the use of small packet-large connections is increasing dramatically. With the coming of the future small packet large connection application era, great challenges are brought to the scheduling-based access mode of wireless communication, more and more solutions based on competitive access become mainstream ideas, and the huge requirements of large connection application on downlink control channels are avoided. Because the random access method needs to allocate resources based on a certain collision probability, it means that for a certain number of access users, a corresponding number of resources needs to be allocated to maintain a certain collision probability.

However, in a small packet large connection scenario, because the number of access users in a unit time varies greatly, if a similar static resource allocation manner in the prior art is adopted, the number of accesses in some time periods is small, which causes resource waste, and the number of accesses in some time periods is large, which increases the collision probability and causes communication congestion. Therefore, the static resource allocation method has a low resource utilization rate and low communication efficiency.

Disclosure of Invention

The embodiment of the invention provides a data transmission method which can improve the utilization rate of resources.

In a first aspect, a method for data transmission is provided, including:

the user equipment sends an uplink random access request signal to the network equipment in a first time window;

the user equipment receives load indication information related to the uplink random access request signal from the network equipment;

the user equipment determines a second time window according to the first time window, wherein the second time window is used for subsequently sending uplink data;

the user equipment determines the total available resources in the second time window according to the load indication information;

the user equipment selects a transmission resource from the total available resources;

and the user equipment sends the uplink data to the network equipment on the sending resource.

Here, the transmission resource refers to a resource for transmitting data. The uplink data sent by the user equipment is uplink data corresponding to the uplink random access request signal.

The resources include at least one of time resources, frequency resources, and code resources.

In the embodiment of the invention, the network equipment determines the load indication information in the first time window according to the number of the random access user equipment in the first time window, and sends the load indication information in a broadcasting mode. The user equipment determines the number of available RBs in the second time window, i.e. based on the received load indication information, i.e. the number of available RBs in the second time window

Thereafter, the user equipment may determine a transmission resource according to the number of the available RBs, and perform transmission of uplink data on the transmission resource. The embodiment of the invention does not need to carry out competition sending on the time frequency resources with the total RB quantity by the user equipment, carries out uplink transmission on the time frequency resources with the available RB quantity, and thus, other time frequency resources can be used by the network equipment for the network equipmentThe communication purpose of the user can improve the utilization rate of resources.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the receiving load indication information related to the uplink random access request signal from the network device includes:

determining a downlink receiving time according to the first time window and the timing relation;

and receiving the load indication information related to the uplink random access request signal from the network equipment in a downlink receiving time window where the downlink receiving time is located. Wherein the timing relationship is used to represent a difference between the downlink receiving time and the first time window.

As an example, the timing relationship may be used to indicate a difference between the number of the last subframe of the first time window and the number of the subframe at the downlink reception time.

Wherein the timing relationship may be predefined. For example, the predefined timing relationship may be pre-stored or pre-configured in the user equipment. Alternatively, the predefined timing relationship may be pre-obtained for the device from another network element. Here, the other network elements may be network devices.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the determining a downlink receiving time includes: and taking the sum of the number of the last subframe of the first time window and the difference as the number of the subframe at the downlink receiving moment.

With reference to any one of the possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the determining a second time window according to the first time window includes: determining the second time window according to the first time window and a predefined offset.

Wherein the offset represents a difference between a time window in which the UE transmits uplink data and a time window in which the UE transmits an uplink random access request signal.

Optionally, the sum of the number of the first time window and the offset may be determined as the number of the second time window.

With reference to the first aspect or any one of the possible implementations of the first aspect, in a fourth possible implementation of the first aspect, the determining the total available resources within the second time window includes:

determining the number of available Resource Blocks (RBs) in the second time window according to the load indication information and the maximum value of a predefined load level;

determining the number of available resources within the second time window according to the number of available RBs.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the determining, according to the load indication information and a maximum value of a predefined load level, the number of available RBs in the second time window includes:

determining the number of available RBs as:

wherein,

representing the number of available RBs, l, within the second time window_OIRepresenting said load indication information, L_OIRepresents a maximum value, M, of said predefined load level_RBRepresents a total number of RBs of the uplink data channel within the second time window.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the determining, according to the number of available RBs, a total available resource in the second time window includes:

determining the total amount of available resources within the second time window as:

wherein Layer_nwRepresenting the total amount of available resources, M, within the second time window_sfRepresenting the number of available subframes, m, of the uplink data channel in the second time window_RBRepresenting the number of RBs, m, on a predefined unit data channel resource_layerIndicating the number of resources of the code division multiplex on a predefined unit data channel resource.

With reference to any one of the possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, before the method, the method further includes: receiving a broadcast SIB from the network device, wherein the broadcast SIB includes resource information of an uplink data channel, and the resource information includes information of a total number and number of RBs and information of a total number and number of available subframes.

With reference to the first aspect or any one of the possible implementations of the first aspect, in an eighth possible implementation of the first aspect, the selecting a transmission resource from the total available resources includes:

randomly selecting one resource from the total available resources as the transmission resource;

or, taking a resource numbered by modulo operation of the identification ID of the user equipment and the total available resource amount as the sending resource.

Each user equipment determines the transmission resource according to the ID of the user equipment, generally, different user equipment has different IDs, so that different user equipment can select different transmission resources to transmit uplink data, thereby avoiding collision among multiple UEs, further reducing retransmission caused by transmission failure, and improving transmission efficiency.

In a second aspect, a method for data transmission is provided, including:

the network equipment receives an uplink random access request signal from at least one user equipment in a first time window;

the network equipment determines load indication information according to the number of the uplink random access request signals received in the first time window;

the network device sends the load indication information to the at least one user device, wherein the load indication information is used for determining sending resources in second time windows of the at least one user device for respectively sending uplink data;

and the network equipment receives uplink data which are respectively sent on the determined sending resources from the at least one user equipment in the second time window.

In the method of the embodiment of the invention, the network equipment determines the load indication information according to the number of the received uplink random access request signals, so that each user equipment determines the sending resource of the data channel according to the load indication information, and the data channel resource can be dynamically allocated, thereby avoiding the conflict among a plurality of UE, improving the utilization rate of the resource and further improving the transmission efficiency.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining load indication information includes: acquiring a predefined access request load level relation;

determining load grades corresponding to the number of the uplink random access request signals according to the access request load grade relation;

and taking the corresponding load grade as the load indication information.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, before the method, the method further includes:

the network equipment sends a broadcast information System Information Block (SIB), wherein the SIB includes resource information of an uplink data channel, and the resource information includes information of the number and the number of total RBs and information of the number and the number of total available subframes.

It is understood that, in the embodiment of the present invention, the uplink random access request signal may be a PRACH or an SRS.

In a third aspect, a user equipment is provided, including: a sending unit, configured to send an uplink random access request signal to a network device within a first time window; a receiving unit, configured to receive load indication information related to the uplink random access request signal from the network device; a processing unit, configured to determine a second time window according to the first time window, where the second time window is used for subsequently sending uplink data; determining total available resources in the second time window according to the load indication information received by the receiving unit; and selecting a transmission resource from the total available resources; the sending unit is further configured to send the uplink data to the network device on the sending resource selected by the processing unit. The user equipment may be configured to perform the respective processes performed by the user equipment in the methods of the first aspect and the implementation manners thereof.

In a fourth aspect, a user equipment is provided that includes a receiver, a processor, and a transmitter. The transmitter is configured to transmit an uplink random access request signal to the network device within a first time window. The receiver is configured to receive load indication information related to the uplink random access request signal from the network device. The processor is used for determining a second time window according to the first time window, and the second time window is used for subsequently sending uplink data; determining total available resources within the second time window according to the load indication information received by a receiver; and selects a transmission resource from the total available resources. The transmitter is further configured to transmit the uplink data to the network device on the transmission resource selected by the processor. The user equipment may be configured to perform the respective processes performed by the user equipment in the methods of the first aspect and the implementation manners thereof.

In a fifth aspect, a network device is provided that includes a receiving unit, a processing unit, and a transmitting unit. A receiving unit, configured to receive an uplink random access request signal from at least one user equipment within a first time window; a processing unit, configured to determine load indication information according to the number of the uplink random access request signals received by the receiving unit in the first time window; a sending unit, configured to send the load indication information determined by the processing unit to the at least one ue, where the load indication information is used to determine sending resources in second time windows of the at least one ue, where the second time windows are used for sending uplink data, respectively; the receiving unit is further configured to receive, in the second time window, uplink data from the at least one user equipment that is respectively sent on the respective determined sending resources. The network device may be configured to perform the respective processes performed by the network device in the methods of the second aspect and the implementation thereof.

In a sixth aspect, a network device is provided that includes a receiver, a processor, and a transmitter. The receiver is used for receiving an uplink random access request signal from at least one user equipment in a first time window; the processor is used for determining load indication information according to the number of the uplink random access request signals received by the receiver in the first time window; the transmitter is configured to send the load indication information determined by the processor to the at least one ue, where the load indication information is used for determining transmission resources in second time windows of the at least one ue, where the second time windows are used for respectively sending uplink data; the receiver is further configured to receive uplink data from the at least one user equipment respectively transmitted on the respective determined transmission resources in the second time window. The network device may be configured to perform the respective processes performed by the network device in the methods of the second aspect and the implementation thereof.

In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code which, when executed by a processor, causes the user equipment to perform the method of data transmission of the first aspect described above, and any of its various implementations.

In an eighth aspect, there is provided a computer program product comprising: computer program code which, when executed by a processor, causes the network device to perform the method of data transmission of the second aspect described above, and any of its various implementations.

In a ninth aspect, there is provided a computer-readable storage medium storing a program for causing a user equipment to execute the method of the first aspect and any of its various implementations.

In a tenth aspect, there is provided a computer-readable storage medium storing a program for causing a network device to execute the method of data transmission of the second aspect described above and any of its various implementations.

In an eleventh aspect, there is provided a communication system comprising the user equipment of the third or fourth aspect and the network equipment of the fifth or sixth aspect.

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 embodiments will be briefly introduced below.

FIG. 1 is a schematic diagram of resources of an embodiment of the invention.

Fig. 2 is a flowchart of a method of data transmission according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a time window of an embodiment of the present invention.

Fig. 4 is a schematic diagram of a transmission resource of a user equipment according to an embodiment of the present invention.

Fig. 5 is a schematic structural block diagram of a user equipment of an embodiment of the present invention.

Fig. 6 is another schematic structural block diagram of a user equipment of the embodiment of the present invention.

Fig. 7 is a schematic block diagram of a network device according to an embodiment of the present invention.

FIG. 8 is another schematic block diagram of a network device 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 below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) System, a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) Communication System, a future 5G Communication System, and the like.

Various embodiments are described herein in connection with User Equipment (UE). A user equipment, which may refer to a terminal device, an Access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, may communicate with one or more core networks via a Radio Access Network (RAN). An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a user equipment in a future 5G network, etc.

Various embodiments are described herein in connection with a network device. The network device may be a base station, a station (station), an Access Point (AP), or the like. The Base Station may be a device for communicating with the user equipment, and for example, may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB, or eNodeB) in an LTE system, or a relay Station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a future 5G network, or the like.

Fig. 1 is a schematic diagram of a time-frequency resource form of an LTE system. The horizontal axis in fig. 1 represents time (time), the vertical axis represents frequency (frequency), and the third dimension represents a code layer (code layer), as shown by different shading in fig. 1. The code layer may also be referred to as a code channel layer or a resource layer.

In the prior art, when a UE transmits an uplink Physical Random Access Channel (PRACH), the UE may randomly use a resource corresponding to a sequence number of a PRACH preamble (preamble) in a time-frequency resource to transmit. However, the number of users accessed in different time-frequency PRACH resource blocks is unstable, some access numbers are large, resulting in more collisions, some access numbers are small, resulting in less collisions, and particularly for a small packet large connection scenario, the difference between the number of users accessed in each time period is large.

In the embodiment of the invention, the resource is divided into a plurality of time windows, the current resource allocation mode of random transmission is improved, the network equipment counts the access load in a certain time period through the quantity of the random access requests, and dynamically instructs the user equipment to select proper resources for random transmission according to the load instruction, so that the utilization rate of the random transmission resources can be improved. A detailed description of an embodiment of the present invention is shown in fig. 2 below.

First, the concept of a time window is defined in the embodiment of the present invention, and one time window has a prescribed time length. For example, the length of one frame may be determined as one time window. Or, for example, the length of 10 subframes may be determined as one time window. Etc., as the present invention is not limited in this respect.

Meanwhile, the embodiment of the invention can predefine the number of Resource Blocks (RBs) on a unit data channel Resource and the number of code division multiplexing resources on the unit data channel Resource. Here, the number of RBs on a unit data channel resource can be represented as m_RBThe number of resources for code division multiplexing on a single data channel resource can be represented as m_layer. It will be appreciated that each data channel comprises m_RBOne RB, and each data channel includes m_layerAnd (4) resources. The unit data channel Resource may also be referred to as a unit Resource of a data channel, and may be, for example, a Resource Element Group (REG), where the Resource Element Group may include at least one Resource block, and optionally, the number of the included Resource blocks may be determined according to a protocol definition, which is not limited herein.

The embodiment of the invention can also predefine the load level relation of the access request and the maximum value of the load level. Wherein the maximum value of the load level can be represented as L_OI. Specifically, the description of the access request load level relationship can be detailed in the following description of S206 in fig. 2.

The embodiment of the invention can also predefine a timing relation, which is used for representing the difference value between the time window for receiving the load indication information by the UE and the time window for sending the uplink random access request signal by the UE. Specifically, the description about the timing relationship can be seen in detail in the following related description in S208 in fig. 2.

The embodiment of the invention can also predefine an offset which is used for representing the difference value between the time window of the UE for sending the uplink data and the time window of the UE for sending the uplink random access request signal. Here, the offset may be represented as n_offset. Specifically, the description about the offset can be seen in detail in the following description about S212 in fig. 2.

It should be noted that "predefined" in this embodiment of the present invention may be pre-configured in the network device and the UE, and may be notified to the UE through higher layer signaling after the network device determines, which is not limited in this embodiment of the present invention.

Fig. 2 is a flowchart of a method of data transmission according to an embodiment of the present invention. Network device 22 and UE 24 are shown in fig. 2. The method shown in fig. 2 comprises the following steps:

s202, the network device 22 receives an uplink random access request signal sent by at least one UE.

Wherein the at least one UE includes UE 24.

Specifically, the network device 22 receives uplink random access request signals respectively sent by at least one UE in a first time window.

For example, for the UE 24, the uplink random access request signal may be sent to the network device 22 within a first time window before the UE 24 needs to send uplink data to the network device 22.

Optionally, the uplink random access request Signal may be a PRACH, or may also be a Sounding Reference Signal (SRS), which is not limited in this embodiment of the present invention.

S204, the network device 22 counts the number of uplink random access request signals received in the first time window.

Specifically, the number of at least one UE transmitting the uplink random access request signal to the network device 22 in the first time window is counted.

It is understood that in S204, at least one UE includes UE 24.

For simplicity of description, only the UE 24 is shown in fig. 2, and the procedures performed by the UE other than the UE 24 in the at least one UE are similar to those performed by the UE 24 and will not be described in detail here.

As an example, as shown in fig. 3, it is assumed that each time window includes 10 subframes. Then, network device 22 may count the number of at least one UE within a first time window as shown in fig. 3. An upward arrow in fig. 3 may indicate an uplink random access request signal received by network device 22.

S206, the network device 22 determines the load indication information according to the counted number of UEs in S204.

Specifically, network device 22 may first obtain a predefined access request load level relationship; determining load grades corresponding to the number according to the load grade relation of the access request; and further taking the corresponding load level as the load indication information.

Optionally, the access request load level relationship may be predefined before S206 or even before S202. For example, the access request load level relationship may be pre-stored at network device 22.

The access request load level relationship includes a corresponding relationship between the number of UEs accessed and the load level, and may be shown as table one as an example.

Watch 1

Load class	Number of user equipments accessed
		10	401-500
9	321-400
		.....
2	51-150
		1	0-50

For example, ifIn S204, it is determined that the number of uplink random access request signals received in the first time window is 102, then by searching for an access request load level relationship, it may be determined that the load level is 2, and further, it may be determined that the load indication information in S206 is 2. The load indication information may be represented as l, for example_OI，l_OI＝2。

In addition, the maximum value of the load level in the access request load level relationship may be represented as L_OI. Access request load level relationship, L, shown for Table one_OI＝10。

Wherein, the maximum value of the load class is used for indicating the maximum value of the number of the user equipments which can be carried by the total number of the RBs of the uplink data channel. That is, when the number of accessed user equipments reaches the maximum value of the load class, all RBs of the uplink data channel need to be used at the time of uplink transmission.

It can be understood that the maximum value of the load level can be obtained according to the predefined access request load level relation.

S208, the network device 22 sends the load indication information to the UE 24.

It is understood that the load indication information corresponds to the first time window. The load indication information is used to indicate the number of uplink random access request signals received by the network device 22 in the first time window. Alternatively, the load indication information may be referred to as load indication information in the first time window.

Optionally, the network device 22 may transmit the load indication information to at least one UE, wherein the at least one UE includes the at least one UE counted in S204.

Alternatively, network device 22 may transmit the load indication information in the form of a broadcast.

Alternatively, the network device 22 may send the load indication information through a downlink control channel. For example, the load indication information l is carried by a downlink control channel_OI. For example, the downlink control channel may transmit the load indication information by means of OIRNTI scrambling associated with the number of the first time window. Wherein the number of the first time windowCan be represented as n_w1I.e. OIRNTI ═ n_w1。

It is understood that in S208, the network device 22 transmits the load indication information at a certain time (for example, time t 0) after the first time window.

Accordingly, the UE 24 should receive the load indication information at some time after the first time window.

Alternatively, a timing relationship may be predefined, where the timing relationship is used to represent a difference between a downlink reception time when the load indication information is received and a first time window when the uplink random access request signal is transmitted. Wherein the difference may be a specific value or the difference may be an interval.

Assuming that the ending time of the first time window is labeled as t1, if the timing relationship represents a difference Δ t, the UE 24 may determine that the downlink receiving time is t1+ Δ t, and then the UE 24 may receive the load indication information sent by the network device 22 at the downlink receiving time.

Assuming that the ending time of the first time window is marked as t1, if the timing relationship represents a difference Δ t1 Δ t2, the UE 24 may receive the load indication information sent by the network device 22 at the downlink receiving time, i.e., the interval t1+ Δ t 1-t 1+ Δ t 2. That is, if the timing relationship indicates a section, the load indication information received by the UE at any time in the section corresponding to the downlink reception time is considered as the load indication information of the first time window.

Assuming that the number of the last subframe of the first time window is n, if the difference represented by the timing relationship is k subframes, the UE 24 may determine that the downlink receiving time is n + k subframes, and the UE 24 receives the load indication information sent by the network device 22 at the n + k subframe.

That is, the UE 24 may use the sum of the number of the last subframe of the first time window and the difference as the number of the subframe at the downlink receiving time.

It should be noted that k may be one value, or k may also be a set of multiple values, as an example. If the value of k is 1 to 5, the UE 24 receives the load indication information in the subframe intervals numbered n +1 to n + 5.

Thus, by predefining a timing relationship, the UE 24 can know to which time window the received load indication information is for.

If UE 24 receives the load indication information sent by network device 22 at time t1+ Δ t, UE 24 may determine from the timing relationship that the received load indication information is for a first time window. That is, the UE 24 receives load indication information from the network device 22 related to the uplink random access request signal transmitted by the UE 24 in the first time window.

As an example, as shown in fig. 3, assuming that the timing relationship is equal to 5 subframes, the network device 22 may transmit the load indication information at the 5 th subframe after the first time window.

On the other hand, if the UE 24 receives the load indication information sent by the network device 22 at time t2, then the UE 24 determines a corresponding time window (assumed to be time window n) according to the timing relationship_w0) However, UE 24 is in time window n_w0Without sending any uplink random access request signal, UE 24 may discard the load indication information received at time t 2.

S210, the UE 24 determines a first time window for sending the uplink random access request signal.

Here, the first time window is a time window in which the UE 24 transmits the uplink random access request signal.

It should be noted that step S210 may be performed simultaneously with S202, i.e. the UE 24 may determine the first time window while transmitting the uplink random access request signal. Alternatively, step S210 may also be performed after S202, e.g. before or after S208. The embodiment of the present invention is not limited thereto.

S212, the UE 24 determines a second time window according to the first time window, and the second time window is used for subsequent uplink data transmission.

Specifically, UE 24 may determine the second time window based on the first time window and a predefined offset.

Optionally, a first time window may be usedIs determined as the number of the second time window, together with the offset. That is, the UE 24 may determine that the time window (i.e., the second time window) of the uplink data is numbered n_data＝n_w1+n_offset. Wherein n is_offsetMay represent an offset preconfigured at the UE 24.

As an example, as shown in fig. 3, assuming the offset is equal to 2, UE 24 may determine the second time window to be a second time window after the first time window.

Thus, after S212, the UE 24 may determine the amount of the available resources in the second time window according to the load indication information. Specifically, the process may include S214 and S216 as follows.

S214, UE 24 determines the number of available RBs within the second time window.

Specifically, UE 24 may determine the number of available RBs within the second time window according to the load indication information received at S208 and a maximum of the predefined load level.

Here, the available RBs indicate RBs that can be used by the user equipment for subsequent uplink transmission.

Wherein, as described in the above step S206, the load indication information can be represented as l_OIThe maximum value of the load level can be represented as L_OI。

If the number of available RBs in the second time window is expressed as

Then step S214 may include:

calculated by the following formula

That is, the UE 24 may determine the number of available RBs in the second time window as a percentage based on a ratio of the load indication information to a maximum value of the load level.

Wherein M is_RBIndicating the total number of RBs of the uplink data channel within the second time window.

As an example, the shaded portion within the second time window in FIG. 3 may represent

The corresponding available resources. That is, resources of RBs that can be used for uplink transmission by the user equipment are indicated.

It is understood that prior to step S214, UE 24 may receive M transmitted by network device 22_RBThe value of (c).

Optionally, in this embodiment of the present invention, before S202, the following steps may be included:

the network device 22 transmits a broadcast Information System Information Block (SIB) including resource Information of an uplink data channel, the resource Information including Information of the total number of RBs and Information of the total number of available subframes. In addition, the resource information may further include number information of the total RBs and number information of the total available subframes.

That is, network device 22 transmits the SIB in the form of broadcast for indicating the resource allocation information of the uplink data channel in each time window. Wherein the total number of RBs included in the resource information can be represented as M_RBThe total number of usable subframes included in the resource information may be represented as M_sf. And wherein M_RBIs m_RBInteger multiples of.

Thereafter, the user equipment may determine transmission resources based on the number of available RBs and perform uplink data on the transmission resourcesTo be transmitted. The embodiment of the invention does not need to carry out competition sending on the time frequency resources with the total number of the RBs by the user equipment, and carries out uplink transmission on the time frequency resources with the number of the available RBs, so that other resources can be used for other communication purposes by the network equipment, thereby improving the utilization rate of the resources.

S216, the UE 24 determines available resources within the second time window.

In the embodiment of the present invention, the available resources may include at least one of time resources, frequency resources, and code resources, for example, may include multiple subframes, RBs, and code channels, and further may include multiplexing resources of multiple dimensions, for example.

Specifically, the UE 24 may determine the number of available resources according to the number of available RBs determined at S214.

If the number of available resources in the second time window is denoted as Layer_nwThen step S216 may include:

the Layer is calculated by adopting the following formula_nw：

Wherein m is_RBDenotes the number of RBs, m, per unit data channel resource_layerIndicating the number of resources of the code division multiplex on a unit data channel resource.

The number arrangement of the available resources in the first time window may be determined as:

idx_sf＝0,...,M_sf-1；

idx_layer＝0,...,m_layer-1；

in addition, herein

The number of RB resources may be the smallest number of all available RB resources

The number of RB resources may be the largest

Individual RB resources, which may also be determined according to other rules

The RB resources, and the specific rule, may be determined according to system requirements or protocol definitions, and are not limited herein.

S218, the UE 24 selects a transmission resource from the available resources.

The transmission resource refers to a resource for transmitting data, and may include at least one of a time resource, a frequency resource, and a code resource.

Alternatively, the UE 24 may randomly select any one of the available resources determined at S216 as the transmission resource.

Alternatively, the UE 24 may first calculate the Identity (ID) of the UE 24 modulo the number of available resources, and then use the resource with a number equal to the modulo value as the transmission resource.

For example, assuming the ID of the UE 24 is N1, the number mod (N1, Layer) may be_nw) As a transmission resource.

Alternatively, the UE 24 may select the transmission resources in other manners, which are not listed here.

S220, the UE 24 transmits the uplink data to the network device 22 on the transmission resource.

It is understood that for at least one UE counted by the network device 22 in S204, each UE may perform a similar procedure as the UE 24.

That is, the network device 22 may receive uplink data respectively transmitted by at least one UE in the second time window. Specifically, the network device 22 may receive, in the second time window, uplink data respectively transmitted by at least one UE on the respective determined transmission resource.

It should be understood that, referring to fig. 3, for a time window between a first time window and a second time window, the following first time window may be used to perform the respective processes of the foregoing method, and in order to avoid repetition, the detailed description is omitted here.

In the embodiment of the present invention, a network side (i.e., a network device) determines a random access request load in a first time window by counting a synchronization signal or a channel transmitted by a random access user in the first time window, and transmits load indication information in a broadcast manner. The user side determines the available resource of the data channel in the second time window based on the received random access load indication information, and each user determines the sending resource of the data channel according to the user number (namely ID). Different user equipment has different IDs, so that different user equipment can select different resources to send uplink data, thereby avoiding the conflict among a plurality of UEs, further reducing the retransmission caused by transmission failure, and improving the transmission efficiency.

As shown in fig. 4, different UEs may select different transmission resources to transmit uplink data to the network device, so as to avoid collision between the UEs. Different shading (grey scale) in fig. 4 indicates different transmission resources. Wherein, the different transmission resources mean that at least one of time resources, frequency resources and code resources are different.

In this way, based on the synchronous large connection scenario, dynamic data channel resources are allocated for data channel transmission of the random access user in the unit time window along with the change of the random access request number in the unit time window. The dynamic allocation mode of the random access resources of the data channel can ensure that the allocated resources are matched with the number of the user equipment, and improve the utilization rate of the resources under the condition of ensuring the communication quality. And different user equipment can randomly select the transmission resource for transmitting the uplink data, although different user equipment has a certain probability to select the same transmission resource, the mode of randomly selecting the transmission resource by the UE can maintain a stable collision probability, and the sudden increase of the collision probability in certain time periods can not be caused, so that the communication congestion can be avoided.

Fig. 5 is a block diagram of a user equipment according to an embodiment of the present invention. The UE 50 shown in fig. 5 includes: a receiving unit 52, a processing unit 54 and a transmitting unit 56.

A sending unit 56, configured to send an uplink random access request signal to the network device in the first time window.

A receiving unit 52, configured to receive load indication information related to the uplink random access request signal from the network device.

A processing unit 54, configured to determine a second time window according to the first time window, where the second time window is used for subsequently sending uplink data; determining a total available resource within the second time window according to the load indication information received by the receiving unit 52; and selects a transmission resource from the total available resources.

The sending unit 56 is further configured to send the uplink data to the network device on the sending resource selected by the processing unit 54.

It is understood that, in the embodiment of the present invention, the time resource may be divided into a plurality of time windows.

Here, the uplink random access request signal may be a PRACH or an SRS.

It should be noted that the network device receives not only the uplink random access request signal transmitted by the UE 50 but also uplink random access request signals transmitted by other UEs within the first time window. The load indication information is determined by the network device according to the number of uplink random access request signals received in the first time window.

It can be seen that, in the embodiment of the present invention, the user equipment sends the uplink random access signal to the network equipment in the first time window, and then receives the load indication information corresponding to the uplink random access request signal from the network equipment, and the user equipment may determine the transmission resource in the second time window according to the load indication information, and further, the user equipment may send the uplink data corresponding to the uplink random access signal to the network equipment on the transmission resource in the second time window. Thereby guaranteeing the transmission of the uplink data.

Optionally, the processing unit 54 is further configured to determine a downlink receiving time according to the first time window and the timing relationship. The receiving unit 52 is specifically configured to receive the load indication information related to the uplink random access request signal from the network device in a downlink receiving time window where the downlink receiving time determined by the processing unit 54 is located. Wherein the timing relationship is used to represent a difference between the downlink receiving time and the first time window.

Optionally, as an embodiment, the processing unit 54 is specifically configured to: and taking the sum of the number of the last subframe of the first time window and the difference as the number of the subframe at the downlink receiving moment.

The processing unit 54 may be configured to: determining the second time window according to the first time window and a predefined offset.

The processing unit 54 may be configured to: determining the number of available RBs in the second time window according to the load indication information and the maximum value of a predefined load level; determining a total number of available resources within the second time window according to the number of available RBs.

The processing unit 54 may be configured to: determining the number of available RBs as:

wherein,

Wherein M is_RBCan be a network deviceAnd (5) preparing for sending.

Further, the processing unit 54 may be configured to: determining the total amount of available resources within the second time window as:

wherein Layer_nwRepresenting the total amount of available resources, M, within the second time window_sfRepresenting the total number of available subframes, m, of the uplink data channel in the second time window_RBRepresenting the number of RBs, m, on a predefined unit data channel resource_layerIndicating the number of resources of the code division multiplex on a predefined unit data channel resource.

Wherein M is_sfAnd M_RBIt may be that the UE 50 received from the network device in advance. Accordingly, the receiving unit 52 may also be configured to:

receiving a broadcast information System Information Block (SIB) from the network device, the SIB including resource information of an uplink data channel, the resource information including information of a total number and a number of RBs and information of a total number and a number of available subframes.

Wherein, the processing unit 54 is specifically configured to: randomly selecting one resource from the total available resources as the transmission resource. Alternatively, the processing unit 54 is specifically configured to: and taking the resource numbered as the resource of the modulo operation of the identification ID of the user equipment and the total available resource quantity as the sending resource.

Thereafter, the user equipment can select transmission resources according to the number of available RBs, andand transmitting the uplink data on the transmission resource. The embodiment of the invention does not need to carry out competition sending on the time frequency resources with the total number of the RBs by the user equipment, and carries out uplink transmission on the time frequency resources with the number of the available RBs, so that other time frequency resources can be used for other communication purposes by the network equipment, thereby improving the utilization rate of the resources. Each user equipment determines the sending resource according to the ID of the user equipment, and different user equipment has different IDs, so that different user equipment can select different sending resources to send uplink data, thereby avoiding the conflict among a plurality of UE, further reducing the retransmission caused by the transmission failure, and improving the transmission efficiency.

It should be noted that in the embodiment of the present invention, the receiving unit 52 may be implemented by a receiver, the processing unit 54 may be implemented by a processor, and the transmitting unit 56 may be implemented by a transmitter. As shown in fig. 6, the user equipment 60 may include a processor 610, a receiver 620, a transmitter 630, and a memory 640. Memory 640 may be used to store timing relationships, maximum load levels, offsets, etc., and may also be used to store code executed by processor 610, etc.

The various components in user device 60 are coupled together by a bus system 650, wherein bus system 650 includes a power bus, a control bus, and a status signal bus in addition to a data bus.

The user equipment 50 shown in fig. 5 or the user equipment 60 shown in fig. 6 can implement the foregoing processes implemented by the UE in the method embodiment of fig. 2, and are not described herein again to avoid repetition.

It should be noted that the above-described method embodiments of the present invention may be applied to or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Fig. 7 is a block diagram of a network device according to an embodiment of the present invention. The network device 70 shown in fig. 7 comprises a receiving unit 72, a processing unit 74 and a transmitting unit 76.

The receiving unit 72 is configured to receive an uplink random access request signal from at least one user equipment within a first time window.

The processing unit 74 is configured to determine the load indication information according to the number of uplink random access request signals received by the receiving unit 72 in the first time window.

The sending unit 76 is configured to send the load indication information determined by the processing unit 74 to the at least one ue, where the load indication information is used for determining sending resources in second time windows of the at least one ue, where the second time windows are used for sending uplink data respectively.

The receiving unit 72 is further configured to receive, in the second time window, uplink data respectively sent by the multiple user equipments on the respective determined sending resources.

The uplink random access request signal received by the receiving unit 72 may be a PRACH or SRS.

The load indication information received by a certain user equipment is the load indication information related to the uplink random access request signal sent by the user equipment. The load indication information may be used for determining, by the user equipment, transmission resources of second time windows for transmitting uplink data, respectively.

Optionally, as an embodiment, the processing unit 74 is specifically configured to: acquiring a predefined access request load level relation; determining load grades corresponding to the number of the uplink random access request signals according to the access request load grade relation; and taking the corresponding load grade as the load indication information.

Wherein, the sending unit 76 is further configured to: and sending a broadcast information SIB, wherein the broadcast information SIB comprises resource information of an uplink data channel, and the resource information comprises the number and the number of available RBs and the number of available subframes.

In the embodiment of the invention, the network equipment determines the random access request load in a first time window by counting the synchronous signals or channels sent by the random access users in the first time window, and sends the load indication information in a broadcast mode. And the UE determines random sending resources of the data channel in the second time window based on the received random access load indication information, continuously numbers the resources of the data channel in the second time window, and determines the sending resources of the data channel according to the user number of each user. This can avoid collisions between multiple UEs, and can improve the efficiency of transmission.

It should be noted that in the embodiment of the present invention, the receiving unit 72 may be implemented by a receiver, the processing unit 74 may be implemented by a processor, and the transmitting unit 76 may be implemented by a transmitter. As shown in fig. 8, network device 80 may include a processor 810, a receiver 820, a transmitter 830, and a memory 840. The memory 840 may be used for storing access request load level relationship, etc., and may also be used for storing codes executed by the processor 810, etc.

The various components in network device 70 are coupled together by a bus system 850, wherein bus system 850 includes a power bus, a control bus, and a status signal bus in addition to a data bus.

The network device 70 shown in fig. 7 or the network device 80 shown in fig. 8 can implement the foregoing processes implemented by the network device in the method embodiment of fig. 2, and in order to avoid repetition, details are not repeated here.

It should be noted that the above-described method embodiments of the present invention may be applied to or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor described above may be a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a ROM, PROM, EPROM, EEPROM, or flash memory, among others. Volatile memory can be RAM, which acts as external cache memory. By way of example and not limitation, many forms of RAM are available, such as SRAM, DRAM, SDRAM, DDR SDRAM, ESDRAM, SLDRAM, and DR RAM. It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, comprising:

2. The method of claim 1, wherein the receiving load indication information related to the uplink random access request signal from the network device comprises:

receiving the load indication information related to the uplink random access request signal from the network equipment in a downlink receiving time window where the downlink receiving time is located;

wherein the timing relationship is used to represent a difference between the downlink receiving time and the first time window.

3. The method of claim 2, wherein the determining the downlink receiving time comprises:

and taking the sum of the number of the last subframe of the first time window and the difference as the number of the subframe at the downlink receiving moment.

4. The method of any of claims 1 to 3, wherein determining a second time window from the first time window comprises:

determining the second time window according to the first time window and a predefined offset.

5. The method of any of claims 1 to 3, wherein the determining the total available resources within the second time window comprises:

according to the maximum value of the load indication information and a predefined load level, determining the number of available Resource Blocks (RBs) in the second time window as:

determining, according to the number of available RBs, the number of available resources in the second time window as:

wherein,

representing the number of available RBs, l, within the second time window_OIRepresenting said load indication information, L_OIRepresents a maximum value, M, of said predefined load level_RBRepresenting the total number of RBs, Layer, of the uplink data channel within the second time window_nwRepresenting the total amount of available resources, M, within the second time window_sfRepresenting the total number of available subframes, m, of the uplink data channel in the second time window_RBRepresenting the number of RBs, m, on a predefined unit data channel resource_layerIndicating the number of resources of the code division multiplex on a predefined unit data channel resource.

6. The method of claim 5, further comprising, prior to the method:

receiving a broadcast information System Information Block (SIB) from the network device, wherein the SIB includes resource information of the uplink data channel, and the resource information includes information of the number and number of total RBs and information of the number and number of total available subframes.

7. The method according to any of claims 1 to 3 or 6, wherein said selecting transmission resources from said total available resources comprises:

or,

and taking the resource numbered as the resource of the modulo operation of the identification ID of the user equipment and the total available resource quantity as the sending resource.

8. A method of data transmission, comprising:

9. The method of claim 8, wherein the determining the load indication information comprises:

acquiring a predefined access request load level relation;

and taking the corresponding load grade as the load indication information.

10. A user device, comprising:

a sending unit, configured to send an uplink random access request signal to a network device within a first time window;

a receiving unit, configured to receive load indication information related to the uplink random access request signal from the network device;

a processing unit, configured to determine a second time window according to the first time window, where the second time window is used for subsequently sending uplink data; determining total available resources in the second time window according to the load indication information received by the receiving unit; and selecting a transmission resource from the total available resources;

the sending unit is further configured to send the uplink data to the network device on the sending resource selected by the processing unit.

11. The user equipment of claim 10,

the processing unit is further configured to determine a downlink receiving time according to the first time window and the timing relationship;

the receiving unit is specifically configured to receive the load indication information related to the uplink random access request signal from the network device in a downlink receiving time window where the downlink receiving time determined by the processing unit is located;

12. The ue of claim 11, wherein the processing unit is specifically configured to:

13. The ue of any one of claims 10 to 12, wherein the processing unit is specifically configured to:

wherein,

representing the number of available RBs, l, within the second time window_OIRepresenting said load indication information, L_OIRepresents a maximum value, M, of said predefined load level_RBRepresenting the total number of RBs, Layer, of the uplink data channel within the second time window_nwRepresenting the total amount of available resources, M, within the second time window_sfRepresenting the post within the second time windowTotal number of available subframes, m, of the uplink data channel_RBRepresenting the number of RBs, m, on a predefined unit data channel resource_layerIndicating the number of resources of the code division multiplex on a predefined unit data channel resource.

14. The ue of any one of claims 10 to 12, wherein the processing unit is specifically configured to:

or,

15. A network device, comprising:

a receiving unit, configured to receive an uplink random access request signal from at least one user equipment within a first time window;

a processing unit, configured to determine load indication information according to the number of the uplink random access request signals received by the receiving unit in the first time window;

a sending unit, configured to send the load indication information determined by the processing unit to the at least one ue, where the load indication information is used to determine sending resources in second time windows of the at least one ue, where the second time windows are used for sending uplink data, respectively;

the receiving unit is further configured to receive, in the second time window, uplink data from the at least one user equipment that is respectively sent on the respective determined sending resources.

16. The network device according to claim 15, wherein the processing unit is specifically configured to:

acquiring a predefined access request load level relation;

and taking the corresponding load grade as the load indication information.