CN107295653B

CN107295653B - Method and device for allocating PRB (physical resource block) resources in carrier

Info

Publication number: CN107295653B
Application number: CN201610201321.7A
Authority: CN
Inventors: 苟伟; 彭佛才; 李新彩; 杨玲
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2020-08-11
Anticipated expiration: 2036-03-31
Also published as: CN107295653A; WO2017167078A1

Abstract

The invention discloses a method and a device for allocating PRB resources in a carrier wave, wherein the method comprises the following steps: dividing a plurality of clusters in PRB resources according to a preset clustering mode; the number of PRB pairs contained in each cluster is the same; one or more PRB pairs are selected from each cluster as PRB pair resources for transmitting data. The scheme of the invention provides a resource allocation method, which can support the mapping of the existing random access sequence in an LTE system, improves the existing resource allocation, obtains the resource scattered in the frequency domain, meets the requirement of regional regulation, can realize the scattered resource allocation, is suitable for unauthorized carriers, and enables the resource allocated by equipment and the signal energy on the resource to occupy the required value of the whole bandwidth and energy.

Description

Method and device for allocating PRB (physical resource block) resources in carrier

Technical Field

The present invention relates to the field of data communications, and in particular, to a method and an apparatus for allocating PRB resources in a carrier.

Background

Currently, communication networks of Long Term Evolution (LTE) are operated by being deployed in licensed carriers, and with the development of LTE, some companies propose "suggest to research the subject of LTE deployment in unlicensed carriers", for example, the companies in the united states in high traffic consider that: with the rapid growth of data traffic, licensed carriers will not be able to withstand the enormous amount of data brought about by the rapid traffic growth in the near future. It is considered that data volume pressure caused by service growth can be solved by deploying LTE in an unlicensed carrier so as to share data traffic in a licensed carrier. Meanwhile, the unlicensed carrier has the following characteristics: on one hand, the unauthorized carrier does not need to be purchased, or the carrier resources have zero cost, so the unauthorized carrier is free or low in cost; on the other hand, because individuals and enterprises can participate in deployment and equipment of equipment manufacturers can also be used, the admission requirement of the unauthorized carrier wave is low; furthermore, the unlicensed carrier has sharing property, and when a plurality of different systems are operated in the unlicensed carrier or different operators of the same system operate in the unlicensed carrier, some resource sharing modes can be considered to improve the carrier efficiency.

In summary, although LTE deployment has obvious advantages in unlicensed carriers, problems still exist in the deployment process; the wireless access technology is multiple (different communication standards are crossed, cooperation is difficult, network topology is diverse), and the wireless access site is multiple (the number of users is large, cooperation is difficult, and centralized management overhead is large). Due to the fact that multiple wireless access technologies exist, various wireless systems exist in unauthorized carriers, coordination among the wireless systems is difficult, and interference is serious. Therefore, for LTE deployment in unlicensed carriers, it is still necessary to support regulation of unlicensed carriers, and most countries require that when systems are deployed in unlicensed carriers, a listen-before-talk mechanism needs to be supported. Interference between adjacent systems caused by simultaneous use of unlicensed carriers can be avoided through a listen-before-talk mechanism. And further introduces a contention backoff mechanism, that is, neighboring system stations (generally, neighboring transmission nodes of the same system) can avoid interference caused when neighboring transmission nodes of the same system use an unlicensed carrier at the same time through the contention backoff mechanism. In addition, regulations stipulate that devices (including a base station and User Equipment (UE)) using an unlicensed carrier need to perform a listen-before-talk mechanism (i.e., Clear Channel Assessment (CCA), also called LBT) before transmission, and when a Channel is idle, the device can use the unlicensed carrier Channel to perform data transmission.

Due to the introduction of the LBT mechanism, the random access design in the existing LTE system needs to be modified to satisfy the requirement that the LTE system operates in the unlicensed carrier.

In LTE, a subframe for uplink random access is composed of the following parts. See fig. 1, comprising a CP (cyclic prefix) and a sequence of random access (Tseq), which in practical implementations is followed by a guard interval (GT, i.e. the channel remains idle and the device performing random access does not transmit a signal). That is, the subframe sequentially includes CP, Tseq, and GT, and the sum of the CP, Tseq, and GT is the duration of one subframe (1ms or 30720 samples).

The UE establishes a connection with the cell through a Random Access Procedure (Random Access Procedure) and acquires uplink synchronization. Only if uplink synchronization is achieved, the UE can perform uplink transmission.

The main purpose of random access is: 1) obtaining uplink synchronization; 2) and allocating a unique identity C-RNTI for the UE.

In the LTE system, one subframe has a duration of 1ms, and includes 14 OFDM symbols of equal length in the case of a standard cyclic prefix (12 OFDM symbols of equal length in the case of an extended CP). Resource allocation of an LTE system is carried out by taking a PRB pair as a unit, each PRB consists of 12 subcarriers in a frequency domain and 7 symbols in the frequency domain, and 2 PRBs which are continuous in time in a subframe are taken as one PRB pair.

The Physical Resource Block (PRB) allocation for uplink random access sequence transmission in the LTE system is:

taking a 20MHz bandwidth as an example, as illustrated in fig. 1 and fig. 2, PRB allocation for uplink random access sequence transmission in the current LTE system is characterized in that a group of uplink random access PRB resources consists of 6 continuous (frequency domain) PRBs, for example, as illustrated in fig. 1, and the 6 PRBs are always located at two ends of a frequency domain of a subframe. In the LTE system, allocation of 6 sets of PRB resources for uplink random access is simultaneously supported in one subframe, and the PRBs are respectively located in 18 consecutive PRBs at two ends of a frequency domain, as shown in fig. 2. The basic characteristics are as follows: the set of PRB resources for uplink random access is continuous 6 PRBs and are located in the PRBs at the two ends of the frequency domain, and a large number of PRBs in the middle of the system bandwidth are not used for uplink random access.

The random access sequence is mapped to the set of PRBs for transmission, for example, the system configures a set of randomly accessed PRB resources in one subframe, and then the UE transmits the uplink random access sequence to the base station in the set of PRB resources.

However, there is an occupancy requirement for nominal bandwidth in some countries or regions where unlicensed carriers are regulated. For example, in europe, there is a requirement for unlicensed carriers in the 5GHz band that at least 80% of the bandwidth is used when a device is using the unlicensed carrier, which is mainly intended because other devices can easily find out whether the unlicensed carrier is idle when performing listen-before-talk CCA energy detection. For an unlicensed carrier, if a device uses only a small portion of the carrier's bandwidth for data transmission, the following problem occurs:

1. the bandwidth for transmitting data is too small, which results in that the signal energy averaged in the whole carrier is lower than the predetermined CCA energy detection threshold, so that other devices may find the carrier idle during CCA detection, and thus use the carrier, so that two devices may use an unauthorized carrier simultaneously to cause interference to each other.

2. When the bandwidth of the data transmitted by the device is centrally located at a certain position of the carrier frequency domain, especially at two ends of the frequency domain, such that when other devices perform CCA detection of an unlicensed carrier, if only part of the bandwidth is detected, for example, the bandwidth occupying 10MHz where the device does not transmit data is detected, it is obvious that the other devices will find that the channel is idle, and thus if the other devices reuse the next subframe and use the 10MHz where the device does not transmit data before, interference will be generated.

Obviously, the PRBs randomly accessed in the existing LTE system do not meet the requirement of the unlicensed carrier, and then the LTE system needs to be deployed in the unlicensed carrier and redesigned to meet the requirement of regulation.

Disclosure of Invention

In order to solve the above problem, the present invention provides a method and an apparatus for allocating PRB resources in a carrier, which can implement discrete resource allocation.

In order to achieve the above object, the present invention provides a method for allocating PRB resources in a carrier, where the method includes:

dividing a plurality of clusters in PRB resources according to a preset clustering mode; the number of PRB pairs contained in each cluster is the same;

one or more PRB pairs are selected from each cluster as PRB pair resources for transmitting data.

Preferably, the data includes one or more of uplink random access channel PRACH data, uplink shared channel PUSCH data, uplink control channel PUCCH data, sounding reference symbol SRS.

Preferably, dividing the PRB resources into a plurality of clusters according to a predetermined clustering method includes:

determining the number of the initial PRB pair of each cluster according to the number of clusters and the interval K between the clusters

Dividing continuous N1 PRB pairs starting from the starting PRB pair into a cluster; where N1 is the number of PRB pairs contained in each cluster.

Preferably, the determining of the number of the starting PRB pair for each cluster

The method comprises the following steps:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

the PRB pair offset when allocating for a cluster,

has a value range of

K is the interval between PRB pairs at the same position in the clusters of the adjacent clusters with odd cluster numbers, or K is the interval between PRB pairs at the same position in the clusters of the adjacent clusters with even cluster numbers;

f_RAa number indicating a cluster;

is the number of the starting PRB pair of the cluster.

The method comprises the following steps:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

a value range of

PRB pair offset when allocating a cluster;

f_RAa number indicating a cluster;

a number of a starting PRB pair for a cluster;

y is the number of consecutive PRB pairs supported in each cluster.

Preferably, the first and second electrodes are formed of a metal,

wherein the content of the first and second substances,

t is used for describing which PRB pair or pairs are allocated in each cluster, and the value of T is more than or equal to 0 and less than or equal to Y-1;

p describes which PRB pairs are allocated according to the PRB pair number of the system bandwidth

Preferably, the base station signals the value of K or f_RASo that the terminal determines the value of the other one according to the notified value and the system bandwidth.

Preferably, the determining another value according to the notified value and the system bandwidth includes:

in case the system bandwidth is 20MHz or the system performs resource allocation per 100 PRB pairs:

when f is notified_RAWhen the value is 10, determining that the corresponding K value is 10;

when f is notified_RAWhen the value is 6, determining that the value of the corresponding K is 16;

when f is notified_RAWhen the value is 12, determining that the corresponding K value is 8;

or

When the notified K value is 10, determining the corresponding f_RAThe value is 10;

when the notified K value is 16, determining the corresponding f_RAThe value is 6;

when the value of K of the notice is 8, determining the corresponding f_RAThe value is 12.

Preferably, the signaling informs the value of K or f_RAOne of the values of (a) is performed in one of the following ways:

sending through Downlink Control Information (DCI);

at K and/or f_RAWhen the parameter is used as a parameter of a cell or a carrier level, the parameter is sent through a broadcast type RRC message;

at K and/or f_RAWhen the parameter is at the cell or carrier level, the parameter is transmitted through the common DCI;

when K and/or f_RAWhen the parameter is used as the UE-specific level, DCI (downlink control information) specific to the UE is used for transmission;

when K and/or f_RAAnd when the parameter is used as the UE-specific level, the DCI corresponding to the PDCCH order is used for transmission.

Preferably, the selecting one or more PRB pairs from each cluster as PRB pair resources for uplink random access includes:

selecting one PRB pair from each cluster as a PRB pair resource for transmitting data; wherein selecting one PRB pair from each cluster is performed in one of the following ways:

selecting PRB pairs with the same serial number in each cluster;

for clusters with even cluster numbers, selecting a PRB pair with the serial number of N2 in the cluster, and for clusters with odd cluster numbers, selecting a PRB pair with the serial number of N3 in the cluster, wherein N2 and N3 are set to be the same or different;

and selecting PRB pairs with the same number in the clusters in two clusters with one adjacent interval.

Preferably, the base station notifies the UE of the number of the PRB pair selected in the specific cluster through an RRC message or DCI message; the DCI is corresponding to the PDCCH order.

Preferably, the selecting one or more PRB pairs from each cluster as PRB pair resources for transmitting data includes:

selecting the same number of PRB pairs from each cluster as PRB pair resources for transmitting data; wherein selecting one PRB pair from each cluster is performed as follows:

when the subframe supports i groups of uplink random access, the first i PRB pairs in each cluster are selected; wherein i is a positive integer.

Preferably, the value of K is determined in one of the following ways:

mode 1, select K values that enable all clusters to be evenly distributed across the entire system bandwidth.

Mode 2, the selected K value enables even numbered clusters to be uniformly distributed, and the difference between the K and the interval between the adjacent even numbered clusters and the odd numbered clusters is the minimum; or, selecting to make the odd numbered clusters uniformly distributed, and to make the difference between the interval between the adjacent even and odd clusters and K be minimum;

a mode 3, selecting a K value which enables all clusters to be uniformly distributed in the whole system bandwidth, and selecting the K value to enable even numbered clusters to be uniformly distributed and enable a difference value between an interval between adjacent even numbered clusters and an interval between adjacent odd numbered clusters and the K to be minimum under the condition that no K value exists to enable all clusters to be uniformly distributed in the whole system bandwidth; or, the odd numbered clusters are uniformly distributed and the difference between the interval between the adjacent even and odd clusters and K is minimized.

Preferably, when the transmission data is an uplink random access channel signal, more than 6 PRB pairs are allocated for each group of random access, and at this time, 6 PRB pairs are selected from the allocated PRB pairs to carry an uplink random access sequence and a corresponding CP; wherein, the selection is to select 6 PRBs by a rule agreed in advance or by a mode of dynamic selection of the base station and then signaling to the UE.

Preferably, for each group of randomly accessed and allocated PRB pairs, the rest PRB pairs transmit any padding data; or repeatedly sending the uplink random sequence and the corresponding CP, wherein the uplink random sequence and the corresponding CP comprise complete repetition or partial repetition.

Preferably, the predetermined rule is: and selecting the first 6 numbered PRB pairs or the last 6 numbered PRB pairs or the middle 6 numbered PRB pairs of each group to transmit the complete uplink random access sequence and the corresponding CP.

Preferably, the base station notifies the UE of the value of T, where T is one or more values, and the value of T is a PRB pair number in a cluster.

Preferably, if

The resource allocation method is used for allocating the PRB pair resources, and the PRB pair resources corresponding to the P values obtained by calculating each T value or the set of T values are the PRB pair resources allocated to one UE or one data block TB.

Preferably, if

The method is used for allocating uplink PRB pair resources, and the PRB pair resources corresponding to the P value obtained by calculating each T value or the set of T values are a group of PRB pair resources accessed randomly.

In order to achieve the above object, the present invention further provides a method for determining PRB resources in a carrier, where the method includes:

In order to achieve the above object, the present invention further provides an apparatus for allocating PRB resources in a carrier, which is disposed in a base station, the apparatus including,

the cluster unit is used for dividing the PRB resources into a plurality of clusters according to a preset cluster mode; the number of PRB pairs contained in each cluster is the same;

and a PRB pair selection unit for selecting one or more PRB pairs from each cluster as PRB pair resources for transmitting data.

Preferably, the clustering unit is also used for

Preferably, the clustering unit comprises a first starting PRB pair confirmation module for determining the number of the starting PRB pair of each cluster according to the following formula

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

the PRB pair offset when allocating for a cluster,

has a value range of

f_RAa number indicating a cluster;

is the number of the starting PRB pair of the cluster.

Preferably, the clustering unit comprises a second starting PRB pair confirmation module for determining the number of the starting PRB pair of each cluster according to the following formula

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

a value range of

PRB pair offset when allocating a cluster;

f_RAa number indicating a cluster;

a number of a starting PRB pair for a cluster;

y is the number of consecutive PRB pairs supported in each cluster.

Preferably, the PRB pair selection unit is further configured to determine an allocated PRB pair according to:

wherein the content of the first and second substances,

p describes which PRB pairs are allocated according to the PRB pair number of the system bandwidth.

Preferably, the device further comprises a notification unit, configured to notify the value of K or f through signaling_RASo that the terminal determines the value of the other one according to the notified value and the system bandwidth.

or

when the notified K value is 8Determining a correspondence f_RAThe value is 12.

Preferably, the notifying unit notifies the value or f of K in one of the following manners_RAThe value of (A) is as follows:

sending through Downlink Control Information (DCI);

Preferably, the PRB pair selection unit includes:

a first selection module, configured to select a PRB pair from each cluster as a PRB pair resource for transmitting data; the first selection module selects one PRB pair from each cluster according to one of the following modes:

selecting PRB pairs with the same serial number in each cluster;

Preferably, the notifying unit is further configured to notify, through an RRC message or DCI information, a number of a PRB pair selected in a specific cluster of the UE; the DCI is corresponding to the PDCCH order.

Preferably, the PRB pair selection unit includes:

a second selecting module, configured to select PRB pairs with the same number from each cluster as PRB pair resources for transmitting data; wherein selecting one PRB pair from each cluster is performed as follows:

Preferably, the clustering unit is further configured to determine a value of K, where the clustering unit determines the value of K according to one of the following manners:

Preferably, the notifying unit is further configured to notify the UE of the value of T, where T is one or more values, and the value of T is a PRB pair number in a cluster.

Preferably, if

Preferably, if

In order to achieve the above object, the present invention further provides an apparatus for determining PRB resources in a carrier, where the apparatus includes:

a clustering determining unit, configured to divide a plurality of clusters in PRB resources according to a predetermined clustering manner; the number of PRB pairs contained in each cluster is the same;

and a PRB pair resource determining unit for selecting one or more PRB pairs from each cluster as the PRB pair resources for transmitting data.

Compared with the prior art, the technical scheme provided by the invention comprises the following steps: dividing a plurality of clusters in PRB resources according to a preset clustering mode; the number of PRB pairs contained in each cluster is the same; one or more PRB pairs are selected from each cluster as PRB pair resources for transmitting data. The scheme of the invention provides a waveform of random access of an unauthorized carrier and a resource allocation method, which can support the mapping of the existing random access sequence in an LTE system, such as directly supporting the mapping and the sending of a format 0, improves the existing resource allocation, thereby obtaining resources scattered in a frequency domain, thereby meeting the requirement of regional regulation, also provides the allocation of a physical resource block, can realize the discrete resource allocation, thereby being suitable for the unauthorized carrier, and ensuring that the allocated resources and the signal energy thereof of equipment account for the whole bandwidth and the requirement of more than 80 percent of the energy.

Drawings

The accompanying drawings in the embodiments of the present invention are described below, and the drawings in the embodiments are provided for further understanding of the present invention, and together with the description serve to explain the present invention without limiting the scope of the present invention.

Fig. 1 is a schematic resource diagram of a PRB pair for uplink random access in the conventional LTE FDD mode;

fig. 2 is a schematic resource diagram of 6 sets of uplink randomly accessed PRB pairs in a conventional LTE TDD mode subframe;

fig. 3 is a schematic resource diagram for allocating 6 clusters in a subframe according to an embodiment of the present invention;

fig. 4 is a schematic resource diagram for allocating 10 clusters in a subframe according to an embodiment of the present invention.

Detailed Description

The following further description of the present invention, in order to facilitate understanding of those skilled in the art, is provided in conjunction with the accompanying drawings and is not intended to limit the scope of the present invention. In the present application, the embodiments and various aspects of the embodiments may be combined with each other without conflict.

The invention provides a method for allocating PRB resources in a carrier, which comprises the following steps:

In the embodiment of the invention, the data comprises one or more of PRACH data, PUSCH data, PUCCH data and SRS data.

In the embodiment of the present invention, dividing a plurality of clusters in PRB resources according to a predetermined clustering manner includes:

In this embodiment of the present invention, the determining the number of the starting PRB pair of each cluster

The method comprises the following steps:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

the PRB pair offset when allocating for a cluster,

has a value range of

f_RAa number indicating a cluster;

is the number of the starting PRB pair of the cluster.

The method comprises the following steps:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

a value range of

PRB pair offset when allocating a cluster;

f_RAa number indicating a cluster;

a number of a starting PRB pair for a cluster;

y is the number of consecutive PRB pairs supported in each cluster.

6. The in-carrier PRB resource allocation method according to claim 5, further comprising:

wherein the content of the first and second substances,

In the embodiment of the invention, the base station informs the value of K or f through signaling_RASo that the terminal determines the value of the other one according to the notified value and the system bandwidth.

In this embodiment of the present invention, the determining another value according to the notified value and the system bandwidth includes:

or

In the embodiment of the invention, the value or f of K is informed through signaling_RAOne of the values of (a) is performed in one of the following ways:

sending through Downlink Control Information (DCI);

In this embodiment of the present invention, the selecting one or more PRB pairs from each cluster as PRB pair resources for uplink random access includes:

selecting PRB pairs with the same serial number in each cluster;

In the embodiment of the invention, a base station informs the UE of the number of the PRB pair selected in a specific cluster through RRC message or DCI message; the DCI is corresponding to the PDCCH order.

In this embodiment of the present invention, the selecting one or more PRB pairs from each cluster as PRB pair resources for transmitting data includes:

In the embodiment of the invention, the value of K is determined according to one of the following modes:

In the embodiment of the invention, when the transmitted data is an uplink random access channel signal, more than 6 PRB pairs are allocated to each group of random access, and at the moment, 6 PRB pairs are selected from the allocated PRB pairs to bear an uplink random access sequence and a corresponding CP; wherein, the selection is to select 6 PRBs by a rule agreed in advance or by a mode of dynamic selection of the base station and then signaling to the UE.

In the embodiment of the invention, the method also comprises that for each group of randomly accessed and distributed PRB pairs, the rest PRB pairs send any filling data; or repeatedly sending the uplink random sequence and the corresponding CP, wherein the uplink random sequence and the corresponding CP comprise complete repetition or partial repetition.

In the embodiment of the present invention, the predetermined rule is: and selecting the first 6 numbered PRB pairs or the last 6 numbered PRB pairs or the middle 6 numbered PRB pairs of each group to transmit the complete uplink random access sequence and the corresponding CP.

In the embodiment of the invention, the base station informs the UE of the value of T, wherein T is one or more values, and the value of T is the PRB pair number in the cluster.

In the embodiment of the present invention, if

In the embodiment of the present invention, if

Used as resource allocation of uplink random access PRB, and PR corresponding to P value obtained by calculating each T value or set of T valuesThe B pair of resources is a group of randomly accessed PRB pair resources.

Based on the same or similar conception with the above embodiments, the embodiment of the present invention further provides another method for determining PRB resources in a carrier, where the method includes:

In this embodiment of the present invention, the terminal divides a plurality of clusters from PRB resources according to the same or similar method in the foregoing embodiment, and selects one or more PRB pairs from each cluster as PRB pair resources for transmitting data according to the same or similar method in the foregoing embodiment, which is not described herein again.

The following description is made in conjunction with a specific implementation scenario,

the invention mainly comprises two aspects, namely resource allocation for uplink random access and allocation for discrete PRB resources.

(1) The resource allocation for uplink random access includes:

the description is given in examples 1, 2, and 3, respectively. The method comprises the following steps:

mode 1, corresponding to embodiment 1, the randomly accessed resource still uses the size of 6 PRB pairs, and at this time, the specific frequency domain position of the cluster where the 6 PRB pairs are located is obtained through the following equation, and then one PRB pair is selected from each cluster to form the randomly accessed resource.

Mode 2, corresponding to embodiment 2, for better occupation and the requirement that the signal energy is concentrated at 80% of the bandwidth, more resources need to be allocated for random access, and the discrete interval is smaller. On the basis of the mode 1, more clusters are added to achieve the purpose of allocating more PRBs, and then a repeated mapping method is adopted for more PRB pairs.

Mode 3 corresponds to embodiment 3, by increasing the subcarrier spacing in the existing random access transmission, for example, after the spacing is increased from 1.25KHz to 2.5KHz, sequence mapping and resource allocation are performed.

(2) Method for discrete PRB resource allocation

And giving a new resource allocation method as PUSCH, PUCCH or SRS or random access resource. Flexible PRB pair or frequency domain resource allocation is achieved in the equation by using the following parameters and some agreed rules.

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pair.

A value range of

The numbering for frequency domain PRB pairs in the system bandwidth may be signaled by a higher layer or signaled through DCI.

K is the interval between PRB pairs at the same position in the clusters of adjacent clusters (the cluster numbers are both odd numbers or even numbers, if the interval between two clusters with the cluster numbers being even numbers and odd numbers can be K or not K), and the K value can also be notified to the UE through DCI or high-layer signaling according to the power spectral density of the signal in the carrier wave (for example, assuming that the whole bandwidth and the number of the PRB pairs in the clusters are sequentially numbered from low frequency to high frequency, the number of the intervals between the PRB pairs with the numbers of 3 and 9 is 6, and the number of the PRB pairs at the actual intervals is 5 PRB pairs).

f_RAIndicating the number of clusters or cluster numbers, if anyAnd if the number of the clusters is represented, the total number is the number of the clusters. To simplify and reduce signaling overhead, at f, the corresponding system bandwidth may be targeted_RAGiven the situation, K values are implicitly given. E.g. 20MHz, f_RAWhen the value is 10, the corresponding implicit K is 10; f. of_RAWhen the value is 6, the corresponding implicit K value is 16; f. of_RAAt 12, the value of K is 8. From only needing to inform f_RAAnd reduces signaling overhead. And f_RACan also set a reasonable value range to reduce f_RAThe overhead of (a).

Y is the number of consecutive PRB pairs supported in each cluster. Each cluster is identical. If the number of PRB pairs supported in each cluster is a fixed value or a value within a given range, the signaling overhead of Y may also be reduced, and if the number is fixed to the fixed value, the parameter may be fixed, and the signaling of the parameter is no longer sent.

The number of the starting PRB pair for every Y consecutive PRB pairs (called a cluster) (the number of PRB pairs in the whole bandwidth for the first PRB pair in the cluster).

T, describing which PRB pair or pairs within each cluster are allocated. The value is 0 or more and Y-1 or less. T is notified to the UE by the base station, and may be a plurality of values, for example, when T ═ 0, 1}, then PRB pairs numbered 0 and 1 in each cluster are allocated. E.g., T-2, then the PRB pair numbered 2 in each cluster is allocated.

P, which describe the PRB pairs allocated in terms of their PRB pair numbers for the system bandwidth.

If the above method is used for allocating PRB pair resources in a carrier, preferably, the PRB pair resources corresponding to the P value (or the set of values) obtained by calculating each T value are a set of randomly accessed PRB pair resources.

The following description will be given with reference to specific examples.

Example 1

When 6 sets of randomly accessed PRB resources are allocated in a subframe, each set uses 6 PRB pairs, so 36 PRB pairs are needed, and the following method is adopted to allocate the PRB resources.

The allocation of 36 PRB pairs is performed using the following equation:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pair.

A value range of

f_RAAnd representing the number of clusters or the serial number of the clusters, if representing the number of the clusters, the value is 0-the maximum number minus 1, and if representing the serial number of the clusters, the total serial number is the number of the clusters. To simplify and reduce signaling overhead, at f, the corresponding system bandwidth may be targeted_RAGiven the situation, K values are implicitly given. E.g. 20MHz, f_RAWhen the value is 10, the corresponding implicit K is 10; f. of_RAWhen the value is 6, the corresponding implicit K value is 16; f. of_RAWhen it is 12, it corresponds toThe value of K is implicitly 8. So that only f needs to be notified_RAReducing signaling overhead. And f_RACan also set a reasonable value range to reduce f_RAThe overhead of (a). f. of_RAThe operation can be a set or a plurality of independent values, and the operation is not affected.

The number of the starting PRB pair for every 6 consecutive PRB pairs (called a cluster) (the number of the PRB pair in the whole bandwidth for the first PRB pair in the cluster). I.e. the number of the starting PRB pair of the cluster (described in terms of the PRB pair number for the whole bandwidth).

The following 36 randomly accessed PRB pairs (which may also be PRBs because the PRBs extend to the subframe boundary in the time domain are PRB pairs, and they are numbered the same and used in pairs) can be obtained by using the above equation.

Example 1, assuming that the system bandwidth is 20MHz, when calculating PRB allocation, the number is 0 to 99 according to 100 corresponding PRB pairs (actually, 20MHz system has 110 PRBs, and the number is from 0 to 109), and the following PRB pair resources can be obtained. The value of K is 16(15, 17 are also possible, as long as discrete PRB pairs in the carrier do not have too large an interval to meet the requirement in regulation).

When f is 4_RAWhen the values are respectively 0, 2, 4, 5, 3 and 1, at this time

Respectively 4, 20, 36, 58, 74, 90, then the allocated PRB pairs (the number corresponding to the 20MHz bandwidth) are 4-9, 20-25, 36-41, 58-63, 74-79, 90-95. As shown in fig. 3, a total of 36 PRB pairs are allocated.

Then, one or more PRB pairs (hereinafter, one example is used) are selected from each cluster to form 6 PRB pairs as the existing PRB pair resource for uplink random access, and the PRB pairs are used for transmitting an uplink random access sequence. Specifically, how to select a PRB pair from each cluster to form a set of PRB pair resources for uplink random access? In the following a simple way is provided which is advantageous for reducing the signalling overhead.

In the mode 1, when only one group of random access resources are supported in a subframe, the first PRB pair is selected from each cluster to form the random access PRB pair resources. And when the subframe supports 2 groups of random access resources, selecting a first PRB pair from each cluster to form a group of random access PRB pair resources, and selecting a 2 nd PRB pair from each cluster to form a 2 nd group of random access PRB pair resources. When the subframe supports 3 groups of random access resources, 1 st PRB pair is selected from each cluster to form 1 st group of random access PRB pair resources, 2 nd PRB pair is selected from each cluster to form 2 nd group of random access PRB pair resources, and 3 rd PRB pair is selected from each cluster to form 3 rd group of random access PRB pair resources. When the sub-frame supports 4, 5 and 6 groups to access the resource along with the street, the analogy is repeated.

In mode 2, in order to avoid the interference caused by the same resources of the random access PRB pairs of the neighboring cells in the same subframe, it is proposed to inform (for example, by higher layer signaling or DCI) the order in which the random access PRB pairs in each cell are selected from the cluster. For example, the base station determines that 1 set of randomly accessed PRB pair resources is needed in a randomly accessed subframe for UE random access sequence transmission, and at this time, the base station notifies the UE through high layer signaling or DCI, and selects the 2 nd PRB pair in each cluster from the above 6 clusters to form a PRB pair resource for the uplink random access of the local cell or the UE.

Therefore, the PRB pair resource allocation for random access of LAA system is: determining 6 clusters of candidate PRB pairs for random access in a subframe by adopting the equation; and then selecting one PRB pair from each cluster to form resources of the PRB pair with random access.

An nth PRB pair is selected from each cluster to form a group of random access resources, and the specific n value can be notified to the UE in a broadcasting mode or a point-to-point mode. n can be a plurality of values. The point-to-point method includes using DCI information in the PDCCH (e) to notify, and the broadcast method may also employ DCI common to the PDCCH (e).

Considering that subcarrier guard intervals are reserved on both sides of each discrete PRB pair for random access, this means that more than 6 PRB pairs need to be allocated to carry the random access sequences in the existing 6 consecutive PRB pairs. Therefore, in this embodiment, more than 6 PRB pairs, for example, 7 PRB pairs, may be allocated, and then several subcarriers on both sides of each PRB pair are not used.

Example 2

The number of randomly accessed PRB pairs in each group in the subframe is increased, for example, from the original 6 to 10. Therefore, the random access resources can be better dispersed in the frequency domain, and the occupation of 80% of the bandwidth of the device sending signals can be better satisfied.

The above-mentioned idea of PRB resource allocation is still used at this time, but some improvements are needed. The K value at this time needs to be adjusted to a value range, for example, the K value is about 10, for example, 10. When 10 clusters need to be allocated at this time, f_RAThe value is 0-9 and is the serial number of the cluster.

Example 1, assuming that the system bandwidth is 20MHz, when calculating PRB allocation, the number is 0 to 99 according to 100 corresponding PRB pairs (actually, 20MHz system has 110 PRBs, and the number is from 0 to 109), and the following PRB pair resources can be obtained. The value of K is 10(11, 12 are also possible, as long as the discrete PRB pairs in the carrier do not have too large an interval to meet the requirement in regulation).

When f is 2_RAWhen the values are 0, 2, 4, 6, 8, 9, 7, 5, 3 and 1 respectively, at the moment

Respectively 2, 12, 22, 32, 42, 52, 62, 72, 82, 92, then the allocated PRB pairs are 2-7, 12-17, 22-27, 32-37, 42-47, 52-57, 62-67, 72-77, 82-87, 92-97. As shown in fig. 4, a total of 60 PRB pairs are allocated.

The case of allocating 12 clusters is as follows:

when the value is 2, the interval K is 8, and when f is_RAWhen the values are 0, 2, 4, 6, 8, 10, 11, 9, 7, 5, 3 and 1 respectively, at this time

Respectively 2, 10, 20, 28, 36, 44, 52, 60, 68, 76, 84, 92, then the allocated PRB pairs are 2-7, 10-15, 20-25, 28-33, 36-41, 44-49, 52-57, 60-65, 68-73, 76-81, 84-89, 92-97.

Then, one PRB pair is selected from each cluster to form 10 PRB pairs which are used as the existing PRB pair resource of the uplink random access and are used for sending the uplink random access sequence. Specifically, how to select a PRB pair from each cluster to form a set of PRB pair resources for uplink random access? In the following a simple way is provided which is advantageous for reducing the signalling overhead.

How is the random access sequence mapped for each set of randomly accessed resources? There are several ways to do this:

mode 1, the length of the random access sequence is increased, so that the occupied resources are increased from 6 PRB pairs to 10 PRB pairs for carrying transmission.

Mode 2, an existing random access sequence is used, for example, a sequence of random access format 0 in the LTE system (which may also include a CP, except that the CP length may be adjusted due to the CCA position), but only 6 PRB pairs are selected from each 10 PRB groups for random access sequence transmission, the remaining 4 are padded by the UE for some arbitrary data transmission, or data in the first 4 PRB pairs of the 6 PRB pairs of the randomly selected random access sequence is repeatedly selected. For example, the first 6 PRB pairs (e.g. 0-5) with smaller index values in 10 PRB pairs (assuming the numbers are 0-9) are selected for random access sequence transmission, and then the random access sequence transmission in the first 4 PRB pairs (e.g. 0-4) is repeated in the last 4 PRB pairs (e.g. 6-9).

How to select 6 PRB pairs from 10 PRB pairs may be performed in various ways, for example, selecting the first 6 PRB pairs, or the last 6 PRB pairs, or dynamically notifying the UE through signaling, for example, a higher layer RRC message, or DCI signaling of a physical layer may be used.

If a group of randomly accessed PRB pairs is added to 12 PRBs, the K value can be adjusted, and the above similar manner is adopted. Data of the PRB pairs actually carrying random access is partially or fully repeated for more than 6 PRB pairs.

Example 3

The subcarrier spacing at the time of transmission of the sequence of the existing random access is modified, for example, from the existing 1.25KHz to 2.5KHz, and then each set of randomly accessed PRB pairs is determined to be 12.

The allocation of candidate PRB pairs still continues as in implementation 2 above, i.e. 72 PRB pairs are generated for random access. It needs to be divided into 12 clusters to generate, and then one PRB pair is selected from each cluster to form 12 PRB pairs for random access.

The K value at this time needs to be adjusted to a value range, for example, the K value is about 8, for example, 8. When 12 clusters need to be allocated at this time, f_RAThe value is 0-11, and the serial number of the cluster is obtained.

Example 1, assuming that the system bandwidth is 20MHz, when calculating PRB allocation, the number is 0 to 99 according to 100 corresponding PRB pairs (actually, 20MHz system has 110 PRBs, and the number is from 0 to 109), and the following PRB pair resources can be obtained. The value of K is 8.

When f is 2_RAWhen the values are 0, 2, 4, 6, 8, 10, 11, 9, 7, 5, 3 and 1 respectively, at this time

Respectively 2, 10, 18, 26, 34, 42, 52, 60, 68, 76, 84, 92, then the allocated PRB pairs are 2-7, 10-15, 18-23, 26-31, 34-39, 42-47, 52-57, 60-65, 68-73, 76-81, 84-89, 92-97.

Then, one PRB pair is selected from each cluster to form 12 PRB pairs which are used as the existing PRB pair resource of uplink random access and are used for transmitting the uplink random access sequence. Specifically, how to select a PRB pair from each cluster to form a set of PRB pair resources for uplink random access? In the following a simple way is provided which is advantageous for reducing the signalling overhead.

In mode 2, in order to avoid the interference caused by the same resources of the random access PRB pairs of the neighboring cells in the same subframe, it is proposed to inform (for example, by higher layer signaling or DCI) the order in which the random access PRB pairs in each cell are selected from the cluster. For example, the base station determines that 1 set of randomly accessed PRB pair resources is needed in the randomly accessed subframe for UE random access sequence transmission, and at this time, the base station notifies the UE through high layer signaling or DCI, and selects the 2 nd PRB pair in each cluster to be the PRB pair resource of the primary cell or uplink random access of the UE from the 12 clusters.

How does the random access sequence map the transmission after 12 PRB pairs for random access? One way is provided below.

After determining the resources of each group of randomly accessed PRB pairs, because the subcarrier spacing is adjusted from the original 1.25KHz to 2.5KHz, the OFDM symbol duration becomes half of the original duration, at this time, the original random access sequence is divided into two halves in time, the first half is mapped in the first 6 PRB pairs (6 PRB pairs with smaller number) in 12 PRB pairs, and the second half is mapped in the last 6 PRB pairs (6 PRB pairs with larger number).

Example 4

The present application of allocating PRB pair for random access (in embodiments 1, 2, and 3) may be used to allocate PRB pair resources for PUSCH, PUCCH, or SRS for a UE.

In this embodiment, the new resource allocation method is PUSCH, PUCCH, SRS, or random access resource. Flexible PRB pair or frequency domain resource allocation is achieved in the equation by using the following parameters and some agreed rules.

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pair.

A value range of

f_RAAnd representing the number of clusters or the serial number of the clusters, if representing the number of the clusters, the value is 0-the maximum number minus 1, and if representing the serial number of the clusters, the total serial number is the number of the clusters. To simplify and reduce signaling overhead, at f, the corresponding system bandwidth may be targeted_RAGiven the situation, K values are implicitly given. E.g. 20MHz, f_RAWhen the value is 10, the corresponding implicit K is 10; f. of_RAWhen the value is 6, the corresponding implicit K value is 16; f. of_RAAt 12, the value of K is 8. From only needing to inform f_RAAnd reduces signaling overhead. And f_RACan also set a reasonable value range to reduce f_RAThe overhead of (a).

T, describes which PRB pair within each cluster is allocated. The value is 0 or more and Y-1 or less. T is notified to the UE by the base station, and may be a plurality of values, for example, when T ═ 0, 1}, then PRB pairs numbered 0 and 1 in each cluster are allocated. E.g., T-2, then the PRB pair numbered 2 in each cluster is allocated.

If the above method is used for allocating the random access PRB pair resources, preferably, the PRB pair resources corresponding to the P value (or the set of values) obtained by calculating each T value are a set of randomly accessed PRB pair resources.

The resource allocation in this application applies to all channels/signals in the unlicensed carrier, typical channels/signals include: PUSCH, PUCCH, SRS (referred to as frequency domain position), uplink random access channel, PDSCH may also be used.

Based on the same or similar concept as the foregoing embodiment, an embodiment of the present invention further provides a PRB resource allocation apparatus in a carrier, where the apparatus is disposed on a base station, and the apparatus includes:

In the embodiment of the invention, the clustering unit is also used for

In this embodiment of the present invention, the clustering unit includes a first starting PRB pair confirmation module, configured to determine a number of a starting PRB pair of each cluster according to the following formula

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

the PRB pair offset when allocating for a cluster,

has a value range of

f_RAa number indicating a cluster;

is the number of the starting PRB pair of the cluster.

In this embodiment of the present invention, the clustering unit includes a second starting PRB pair confirmation module, configured to determine the number of the starting PRB pair of each cluster according to the following formula

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

a value range of

PRB pair offset when allocating a cluster;

f_RAa number indicating a cluster;

a number of a starting PRB pair for a cluster;

y is the number of consecutive PRB pairs supported in each cluster.

In this embodiment of the present invention, the apparatus for allocating PRB resources in the carrier further includes: the second starting PRB pair confirmation module is further configured to determine an allocated PRB pair according to:

wherein the content of the first and second substances,

In the embodiment of the present invention, the apparatus further includes a notification unit, configured to notify the value of K or f through signaling_RASo that the terminal determines the value of the other one according to the notified value and the system bandwidth.

or

In the embodiment of the present invention, the notification unit notifies the value or f of K in one of the following manners_RAThe value of (A) is as follows:

sending through Downlink Control Information (DCI);

In this embodiment of the present invention, the PRB pair selecting unit includes:

selecting PRB pairs with the same serial number in each cluster;

In this embodiment of the present invention, the notifying unit is further configured to notify, through an RRC message or DCI information, a number of a PRB pair selected in a specific cluster of the UE; the DCI is corresponding to the PDCCH order.

In this embodiment of the present invention, the clustering unit is further configured to determine a value of K, where the clustering unit determines the value of K according to one of the following manners:

In this embodiment of the present invention, the notifying unit is further configured to notify the UE of the value of T, where T is one or more values, and the value of T is a PRB pair number in a cluster.

In the embodiment of the present invention, the first and second substrates,

if it is not

Is used for PRB to allocate resources, and each T value or set of T values is calculatedThe PRB pair resource corresponding to the obtained P value is the PRB pair resource allocated to one UE or one data block TB.

In the embodiment of the present invention, the first and second substrates,

if it is not

Based on the same or similar concept as the foregoing embodiment, an embodiment of the present invention further provides a device for allocating PRB resources in a carrier, where the device is disposed on a user equipment UE, and the device includes:

It should be noted that the above-mentioned embodiments are only for facilitating the understanding of those skilled in the art, and are not intended to limit the scope of the present invention, and any obvious substitutions, modifications, etc. made by those skilled in the art without departing from the inventive concept of the present invention are within the scope of the present invention.

Claims

1. A method for allocating PRB resources in a carrier, the method comprising:

selecting one or more PRB pairs from each cluster as PRB pair resources for transmitting data;

the selecting one or more PRB pairs from each cluster as PRB pair resources for transmitting data comprises:

selecting PRB pairs with the same serial number in each cluster;

2. The method for allocating PRB resources in a carrier according to claim 1,

the data comprises one or more of uplink random access channel (PRACH) data, uplink shared channel (PUSCH) data, uplink control channel (PUCCH) data and Sounding Reference Symbols (SRS).

3. The method for allocating PRB resources in a carrier according to claim 1,

dividing a plurality of clusters in the PRB resource according to a predetermined clustering mode comprises the following steps:

4. The method according to claim 3, wherein the determining the number of the starting PRB pair of each cluster

The method comprises the following steps:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

the PRB pair offset when allocating for a cluster,

has a value range of

f_RAa number indicating a cluster;

is the number of the starting PRB pair of the cluster.

5. The method according to claim 3, wherein the determining the number of the starting PRB pair of each cluster

The method comprises the following steps:

wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

a value range of

PRB pair offset when allocating a cluster;

f_RAa number indicating a cluster;

a number of a starting PRB pair for a cluster;

y is the number of consecutive PRB pairs supported in each cluster.

6. The method for allocating PRB resources in a carrier according to claim 5, further comprising:

wherein the content of the first and second substances,

7. The method for allocating PRB resources in a carrier according to claim 4 or 5, wherein the base station signals K value or f_RASo that the terminal determines the value of the other one according to the notified value and the system bandwidth.

8. The method according to claim 7, wherein the determining another value according to the notified value and the system bandwidth comprises:

or

9. The method according to claim 7, wherein the signaling indicates K value or f_RAOne of the values of (a) is performed in one of the following ways:

sending through Downlink Control Information (DCI);

10. The method for allocating PRB resources in a carrier according to claim 1,

the base station informs the UE of the number of the PRB pair selected in the specific cluster through RRC message or DCI message; the DCI is corresponding to the PDCCHorder.

11. The method for allocating PRB resources in a carrier according to claim 1,

selecting the same number of PRB pairs from each cluster as PRB pair resources for transmitting data; wherein the selection of the same number of PRB pairs from each cluster is performed as follows:

12. The method according to claim 3, wherein the value of K is determined according to one of the following manners:

mode 1, selecting a K value which enables all clusters to be uniformly distributed in the whole system bandwidth;

13. The method according to claim 1, wherein when the transmitted data is an uplink random access channel signal, more than 6 PRB pairs are allocated for each set of random access, and at this time, from the allocated PRB pairs, 6 PRB pairs are selected to carry an uplink random access sequence and a corresponding CP; wherein, the selection is to select 6 PRBs by a rule agreed in advance or by a mode of dynamic selection of the base station and then signaling to the UE.

14. The method according to claim 13, further comprising, for each set of randomly-accessed allocated PRB pairs, transmitting any padding data for the remaining PRB pairs; or repeatedly sending the uplink random sequence and the corresponding CP, wherein the uplink random sequence and the corresponding CP comprise complete repetition or partial repetition.

15. The method according to claim 13, wherein the pre-agreed rules are as follows: and selecting the first 6 numbered PRB pairs or the last 6 numbered PRB pairs or the middle 6 numbered PRB pairs of each group to transmit the complete uplink random access sequence and the corresponding CP.

16. The method according to claim 6, wherein the PRB resource allocation method in a carrier,

and the base station informs the UE of the T value, wherein T is one or more values, and the T value is the PRB pair number in the cluster.

17. The method according to claim 6, wherein the PRB resource allocation method in a carrier,

if it is not

18. The method according to claim 6, wherein the PRB resource allocation method in a carrier,

if it is not

Is used as uplink randomAnd accessing PRB pair resource allocation, wherein the PRB pair resource corresponding to the P value obtained by calculating each T value or the set of T values is a group of randomly accessed PRB pair resources.

19. A method for determining PRB resources in a carrier is applied to User Equipment (UE), and is characterized in that the method comprises the following steps:

selecting PRB pairs with the same serial number in each cluster;

20. The method for determining PRB resources in a carrier according to claim 19,

21. An apparatus for allocating PRB resources in a carrier, the apparatus being disposed on a base station, the apparatus comprising,

a PRB pair selection unit for selecting one or more PRB pairs from each cluster as PRB pair resources for transmitting data;

the PRB pair selection unit includes:

selecting PRB pairs with the same serial number in each cluster;

22. The in-carrier PRB resource allocation apparatus according to claim 21,

23. The in-carrier PRB resource allocation apparatus according to claim 21,

the clustering unit is also used for

24. The in-carrier PRB resource allocation apparatus of claim 23, wherein the clustering unit comprises a first starting PRB pair confirmation module configured to perform the followingThe formula determines the number of the starting PRB pair for each cluster

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

the PRB pair offset when allocating for a cluster,

has a value range of

f_RAa number indicating a cluster;

is the number of the starting PRB pair of the cluster.

25. The apparatus according to claim 23, wherein the clustering unit comprises a second starting PRB pair confirmation module for determining the number of the starting PRB pair for each cluster according to the following formula

Wherein the content of the first and second substances,

the total number of resources of the uplink PRB pairs;

a value range of

PRB pair offset when allocating a cluster;

f_RAa number indicating a cluster;

a number of a starting PRB pair for a cluster;

y is the number of consecutive PRB pairs supported in each cluster.

26. The apparatus for in-carrier PRB resource allocation according to claim 25, further comprising: the PRB pair selection unit is further configured to determine an allocated PRB pair according to:

wherein the content of the first and second substances,

27. The apparatus for allocating PRB resources in a carrier according to claim 24 or 25, further comprising a notification unit for signaling K value or f_RASo that the terminal determines the value of the other one according to the notified value and the system bandwidth.

28. The apparatus for allocating PRB resources in a carrier according to claim 27, where the determining, according to the signaled value and system bandwidth, another value comprises:

or

29. The apparatus according to claim 27, wherein the notification unit notifies K or f according to one of the following manners_RAThe value of (A) is as follows:

sending through Downlink Control Information (DCI);

when K and/or f_RAAs a parameter of the UE-specific levelSending by using DCI special for User Equipment (UE);

30. The in-carrier PRB resource allocation apparatus of claim 21, further comprising

The notification unit is used for notifying the UE of the number of the selected PRB pair in the specific cluster through RRC message or DCI message; the DCI is corresponding to the PDCCH order.

31. The in-carrier PRB resource allocation apparatus according to claim 21,

the PRB pair selection unit includes:

32. The apparatus for allocating PRB resources in a carrier according to claim 23, wherein the clustering unit is further configured to determine a value of K, and wherein the clustering unit determines the value of K according to one of the following manners:

33. The apparatus according to claim 21, wherein when the transmitted data is an uplink random access channel signal, more than 6 PRB pairs are allocated for each set of random access, and at this time, from the allocated PRB pairs, 6 PRB pairs are selected to carry the uplink random access sequence and the corresponding CP; wherein, the selection is to select 6 PRBs by a rule agreed in advance or by a mode of dynamic selection of the base station and then signaling to the UE.

34. The apparatus for in-carrier PRB resource allocation according to claim 33, further comprising for each set of randomly-access-allocated PRB pairs, transmitting any padding data for the remaining PRB pairs; or repeatedly sending the uplink random sequence and the corresponding CP, wherein the uplink random sequence and the corresponding CP comprise complete repetition or partial repetition.

35. The apparatus for allocating PRBs in a carrier of claim 33, wherein the pre-agreed rules are: and selecting the first 6 numbered PRB pairs or the last 6 numbered PRB pairs or the middle 6 numbered PRB pairs of each group to transmit the complete uplink random access sequence and the corresponding CP.

36. The in-carrier PRB resource allocation apparatus of claim 26, further comprising

And the notification unit is used for notifying the value of the T to the UE, wherein the T is one or more values, and the T value is the PRB pair number in the cluster.

37. The in-carrier PRB resource allocation apparatus according to claim 26,

if it is not

38. The in-carrier PRB resource allocation apparatus according to claim 26,

if it is not

39. An apparatus for determining PRB resources in a carrier, provided on a User Equipment (UE), the apparatus comprising:

a PRB pair resource determining unit for selecting one or more PRB pairs from each cluster as the PRB pair resource for transmitting data;

the PRB pair selection unit includes:

selecting PRB pairs with the same serial number in each cluster;

40. The in-carrier PRB resource determination apparatus of claim 39,