CN104144449A

CN104144449A - Resource configuration method and system and relevant device

Info

Publication number: CN104144449A
Application number: CN201310172851.XA
Authority: CN
Inventors: 徐俊; 戴博; 李儒岳; 张峻峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-05-10
Filing date: 2013-05-10
Publication date: 2014-11-12
Anticipated expiration: 2033-05-10
Also published as: CN104144449B

Abstract

The invention discloses a resource configuration method and system and a relevant device. A base station sends virtual bandwidth configuration information to a terminal through high-level configuration signalling, the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether the virtual bandwidths are adopted or not, the system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are all positive integers larger than or equal to one, and K<N. The virtual bandwidths are configured, signalling cost in small cells can be lowered, interference cooperation between the small cells is supported, data transmission of the small cells is supported well under the condition of being compatible with an existing system and guaranteeing consistency of transmission and feedback, and frequency efficiency of the system is improved.

Description

Resource allocation method, system and related device

Technical Field

The present invention relates to the field of mobile wireless communications, and in particular, to a resource allocation method, system and related apparatus.

Background

In a mobile communication system, due to the time-varying characteristic of a wireless fading channel, a great deal of uncertainty exists in the communication process, on one hand, in order to improve the system throughput, high-order modulation with higher transmission rate and less redundant error correction codes are adopted for communication, so that the system throughput is really greatly improved when the signal-to-noise ratio of the wireless fading channel is ideal, but when the channel is in deep fading, the reliable and stable communication cannot be guaranteed, on the other hand, in order to guarantee the reliability of communication, low-order modulation with lower transmission rate and large redundant error correction codes are adopted for communication, namely, when the wireless channel is in deep fading, the reliable and stable communication is guaranteed, however, when the signal-to-noise ratio of the channel is higher, the improvement of the system throughput is restricted due to lower transmission rate, so that the waste of resources is caused, and in the early development of, people can only adopt and increase the transmission power of the transmitter against the time-varying characteristic of the wireless fading channel, use the modulation coding method of the big redundancy of low order to guarantee the communication quality of the system when the channel is deeply faded, still take the trouble of improving the throughput of the system into consideration, with the progress of the technological level, the technology that can self-adaptively adjust its transmission power according to the channel state, the modulation coding mode and the frame length of the data to overcome the time-varying characteristic of the channel and thus obtain the best communication effect appears, is called as the adaptive coding modulation technology, and belongs to the most typical link adaptive technology.

In a Long Term Evolution (LTE) system, the uplink control signaling to be transmitted has three forms of correct/error response message (ACK/NACK) and downlink physical Channel State Information (CSI): channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI).

The CQI is an index for measuring the quality of the downlink channel. In the 36-213 protocol, CQIs are represented by integer values of 0-15, which respectively represent different CQI levels, and the different CQIs correspond to respective MCS (Modulation and Coding Scheme), as shown in table 1. The selection of CQI level should follow the criteria as shown in table 1:

TABLE 1

In table 1, qam (quadrature Amplitude modulation) represents quadrature Amplitude modulation, qpsk (quadrature Phase Shift keying) represents quadrature Phase Shift keying, and the modulation scheme is a digital modulation scheme.

The selected CQI level should be such that the block error rate of a PDSCH (Physical downlink shared Channel) transport block corresponding to the CQI does not exceed 0.1 under the corresponding MCS.

Based on a non-limited detection interval in the frequency domain and the time domain, the terminal will obtain the highest CQI value, corresponding to the maximum CQI value reported in each uplink subframe n, with a sequence number range of CQI of 1-15, and satisfy the following condition, if CQI sequence number 1 does not satisfy the condition, with a CQI sequence number of 0: a single PDSCH transport block, which has an error rate of no more than 0.1 when received, contains joint information: the modulation mode and the transport block size correspond to a CQI sequence number and a set of occupied downlink physical resource blocks, i.e., CQI reference resources. The highest CQI value is the largest CQI value when a BLER (Block Error Ratio) is not greater than 0.1, which is beneficial to controlling resource allocation. In general, the smaller the CQI value, the more resources are occupied and the better the BLER performance.

Associated information with transport block size and modulation scheme corresponding to a CQI sequence number, if: these joint information of PDSCH transmission in CQI reference resources can be signaled according to the relevant transport block size, in addition:

the modulation scheme is characterized by the CQI index and uses the joint information including transport block size and modulation scheme in the reference resource, which results in an effective channel coding rate that is the closest possible effective channel coding rate that can be characterized by the CQI index. When there is more than one such joint information, which all may yield the same approximate effective channel coding rate characterized by the CQI sequence number, the joint information with the smallest transport block size is used.

Each CQI number corresponds to a modulation scheme and a transport block size, and the correspondence between the transport block size and the NPRB may be represented by a table. The coding rate can be calculated according to the transport block size and the size of the NPRB.

In the LTE system, the ACK/NACK response message is transmitted in a format 1/1a/lb (PUCCH format/1 a1/b) on a Physical Uplink Control Channel (PUCCH), and is transmitted on a Physical Uplink Shared Channel (PUSCH) if a terminal (terminal: User Equipment) needs to send Uplink data, where the feedback of the CQI/PMI and the RI may be periodic feedback or aperiodic feedback, and the Uplink Physical channels corresponding to the periodic feedback and the aperiodic feedback are shown in table 2:

scheduling modes	Periodic CQI reporting channel	Aperiodic CQI reporting channel
			Frequency non-selectivity	PUCCH
Frequency selectivity	PUCCH	PUSCH

TABLE 2

For the CQI/PMI and RI fed back periodically, if the terminal does not need to send uplink data, the CQI/PMI fed back periodically is transmitted on the PUCCH in a format2/2a/2b (pucchfromat 2/2a/2b), and if the terminal needs to send uplink data, the CQI/PMI and RI are transmitted on the PUSCH; for aperiodic fed back CQI/PMI, RI, only transmitted on PUSCH.

The Release 8(Release8) standard of Long-Term Evolution (Long-Term Evolution, LTE) defines the following three downlink physical control channels: a Physical Downlink Control Format Indicator Channel (PCFICH for short), a Physical Hybrid Automatic Retransmission request Indicator Channel (PHICH for short), and a Physical Downlink Control Channel (PDCCH for short). The PDCCH is configured to carry Downlink Control Information (DCI), and includes: uplink and downlink scheduling information, and uplink power control information. The format of DCI (DCI format) is classified into the following: DCI format0, DCI format1, DCI format1A, DCI format1B, DCI format1C, DCI format1D, DCI format2, DCI format2A, DCI format2B, DCI format2C, DCI format2D, DCI format3, DCI format3A, and the like;

in LTE, downlink control information such as a code modulation scheme, a resource allocation location, and HARQ information needs to be defined in downlink control signaling. The downlink scheduling of the base station determines the resource allocation mode and the location of the allocated resource, the number of bits required for resource allocation depends on the bandwidth, and therefore the size of the message also varies with the system bandwidth. LTE defines three ways of resource allocation, namely type0, type1, and type 2. Type0 and Type1 apply to discontinuous allocation scenarios, Type2 applies to continuous allocation scenarios; two important factors, namely signaling overhead and scheduling flexibility, are mainly considered for resource allocation, so that in an LTE system, a method of self-adaptive granularity bitmap and discrete bitmap is adopted, and the scheduling flexibility is considered on the premise of ensuring the signaling overhead, wherein the method of self-adaptive granularity bitmap is used by type0, and the method of discrete bitmap is used by type 1;

the downlink scheduling of the base station also determines a coding modulation mode, specifically, a modulation and transport block size table is defined in the protocol, each row of the table corresponds to one MCS index, for each MCS index, the modulation and transport block size table defines a combination of a modulation mode and a code rate, and the specific table can refer to the 36.213 standard of LTE.

In release R10, the terminal receives PDSCH data transmissions as indicated by the PDCCH of the user equipment-Specific search space, by a transmission mode (transmission mode) set to be based on one of the following, high-layer signaling semi-static (semi-static):

transmission mode 1: a single antenna port; port 0(Single-antenna port; port0)

Transmission mode 2: transmission diversity (Transmit diversity)

Transmission mode 3: open-loop spatial multiplexing (Open-loop spatial multiplexing)

Transmission mode 4: closed-loop spatial multiplexing (Closed-loop spatial multiplexing)

Transmission mode 5: multi-user multiple input multiple output (Multi-user MIMO)

Transmission mode 6: closed loop Rank 1 precoding (Closed-loop Rank l precoding)

Transmission mode 7: a single antenna port; port 5(Single-antenna port; port5)

Transmission mode 8: dual stream transmission, i.e. dual stream beamforming

Transmission mode 9: up to8 layers of transmission. (up to8layer transmission)

Transmission mode 10: up to8 layers of transmission supporting COMP functions.

The terminal feeds back different channel state information to the sending end according to different transmission modes, then the sending end (eNB) carries out scheduling according to the channel state information fed back by the terminal (terminal), and new channel state information is configured for actual transmission according to a certain principle (such as a maximum capacity principle). Wherein the fed back channel state information comprises: channel Quality Indication (CQI) information, Precoding Matrix Indicator (PMI) information, and Rank Indicator (RI) information.

The CQI is an index for measuring the quality of the downlink channel. In the 36-213 protocol, the CQIs are expressed by integer values of 0 to 15, and represent different CQI levels, and the different CQIs correspond to respective modulation schemes and coding rates (MCSs).

The RI is used to describe the number of spatially independent channels, corresponding to the rank of the channel response matrix. In the open-loop spatial multiplexing mode and the closed-loop spatial multiplexing mode, the terminal needs to feed back the RI information, and in other modes, the RI information does not need to be fed back.

The PMI refers to an index number of a precoding codebook fed back by the terminal. In 3 modes of closed-loop spatial multiplexing, MU-MIMO, and closed-loop with RI being 1, PMI information needs to be fed back, and PMI information is not fed back in other transmission modes.

The feedback of the channel state information includes periodic feedback and aperiodic feedback, and the complete reporting set of the channel state information is defined by a feedback mode. The aperiodic feedback mode comprises a mode 1-2, a mode 2-0, a mode 2-2, a mode 3-0 and a mode 3-1, and R12 also increases the mode 3-2. There are 4 periodic feedback modes, i.e., mode 1-0, mode 1-1, mode 2-0, and mode 2-1.

After undergoing several versions of R8/9/10/11, a Long Term Evolution (LTE) system continuously and accurately researches an R12 technology. At present, the products of the parts R8, R9 and R10 are gradually commercialized, and R11 is ready for further product planning.

With the development of heterogeneous networks, small cells become a research hotspot of R12. In the new evolved system of LTE-a, the number of small cells will be significantly increased, so that the new evolved system can support more hotspots and have better edge coverage, more small cells result in a significant increase in signaling overhead of the system, more small cells also result in a significant increase in inter-cell interference, and as a result, the efficiency of the whole system will be significantly reduced.

At present, the number of terminals in a small cell is small, for example, 1 or 2, only 1 terminal may be scheduled on one subframe, in order to reduce signaling overhead and improve spectrum efficiency, scheduling and feedback need to be optimized, overhead of downlink control signaling and uplink feedback signaling is reduced under a signaling design condition compatible with an existing system as much as possible, and spectrum efficiency of the entire system is improved, but the existing standard cannot meet the requirement.

Disclosure of Invention

In view of the above, the present invention provides a resource allocation method, a system and a related device, which can reduce system signaling overhead and coordinate inter-cell interference under the condition of being compatible with the existing system, and improve the system spectrum efficiency of the entire system.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method of resource allocation, comprising:

the base station sends virtual bandwidth configuration information to a terminal through a high-level configuration signaling, wherein the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether the virtual bandwidths are used, the system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N.

The virtual bandwidth configuration information indicates that the X virtual bandwidths corresponding to the terminal are:

the virtual bandwidth information indicates a virtual bandwidth corresponding to each channel state information process CSI process of the terminal, and the number of the virtual bandwidths depends on the number of the channel state information processes;

or the virtual bandwidth information indicates a virtual bandwidth corresponding to each non-zero-power CSI-RS resource of the terminal, and the number of the virtual bandwidths depends on the number of the non-zero-power CSI-RS resources;

or, the virtual bandwidth information indicates a virtual bandwidth corresponding to each CSI IM resource of the terminal, where the number of virtual bandwidths depends on the number of CSI IM resources,

wherein X is greater than or equal to 2.

The virtual bandwidth configuration information indicates whether to use a virtual bandwidth as:

if the virtual bandwidth configuration information indicates that the virtual bandwidth is used, the downlink control signaling has information indicating X virtual bandwidths corresponding to the terminal, otherwise, the downlink control signaling does not have the information indicating the virtual bandwidths.

The method further comprises the following steps:

and the base station sends the channel state information reference symbol to the terminal on the system bandwidth and/or the virtual bandwidth.

The method further comprises the following steps:

and the base station receives the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal.

The base station receiving the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal is as follows:

when the base station receives channel state information on the virtual bandwidth of the terminal, the channel state information is a channel state information report set defined by an existing feedback mode x-y based on the virtual bandwidth configured to the terminal occupied by a subband set, wherein x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

and/or when the base station receives the channel state information on the system bandwidth of the terminal, the channel state information is a CSI report set defined by an existing feedback mode x-y redefined as a virtual bandwidth based on a subband, and the feedback mode is periodic or aperiodic, wherein x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

and/or when the base station is not configured with virtual bandwidth allocation information and receives channel state information CSI on the system bandwidth of the terminal, the channel state information is a CSI report set defined by an existing feedback mode x-y, wherein x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0.

The method further comprises the following steps:

for a partial feedback mode, the base station receives the channel state information on the virtual bandwidth of the terminal, and for other feedback modes, the base station receives the channel state information on the system bandwidth of the terminal.

The method further comprises the following steps:

and the base station sends a downlink control signaling to the terminal, wherein the downlink control signaling at least comprises a resource allocation domain and is used for indicating the allocation of resource blocks according to the system bandwidth and/or the virtual bandwidth.

The resource allocation domain indicates the allocation of resource blocks according to the system bandwidth and/or the virtual bandwidth as follows:

the resource allocation domain is default, and the terminal is defaulted to occupy all resources on the virtual bandwidth;

and/or, in the public search space, indicating the allocation of resource blocks according to the system bandwidth, and in the special search space, indicating the allocation of resource blocks according to the virtual bandwidth;

and/or, indicating the allocation of resource blocks on a physical downlink control channel PDCCH according to the system bandwidth, and indicating the allocation of resource blocks on an enhanced physical downlink control channel ePDCCH according to the virtual bandwidth;

and/or indicating the allocation of the resource blocks according to the system bandwidth for part of the DCI formats and indicating the allocation of the resource blocks according to the virtual bandwidth for other DCI formats;

and/or indicating the allocation of resource blocks on part of subframe sets according to the system bandwidth and indicating the allocation of resource blocks on other subframe sets according to the virtual bandwidth;

and/or when the base station does not configure the virtual bandwidth allocation information, indicating the allocation of resource blocks according to the system bandwidth.

The method further comprises the following steps:

and the base station sends the virtual bandwidth configuration information to one or more base stations adjacent to the base station through the signaling of an X2 interface.

The method specifically comprises the following steps:

the base station sends the virtual bandwidth configuration information of each terminal to one or more base stations adjacent to the base station through X2 interface signaling;

or, the base station combines the virtual bandwidth configuration information of all the terminals into a message dedicated to one cell, and sends the message to one or more base stations adjacent to the base station through signaling of an X2 interface.

A terminal includes a virtual bandwidth configuration information receiving unit,

the virtual bandwidth configuration information receiving unit is configured to receive virtual bandwidth configuration information sent by a base station through a high-level configuration signaling, where the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether to use the virtual bandwidths, a system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N.

wherein X is greater than or equal to 2.

if the virtual bandwidth configuration information indicates that the virtual bandwidth is used, the received downlink control signaling has information indicating X virtual bandwidths corresponding to the terminal, otherwise, the received downlink control signaling does not have the information indicating the virtual bandwidth.

The terminal further includes: a channel state information reference symbol receiving unit and a channel state information calculating unit, wherein,

the channel state information reference symbol receiving unit is used for receiving the channel state information reference symbols sent by the base station on the system bandwidth and/or the virtual bandwidth;

and the channel state information calculating unit is used for calculating the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal based on the received channel state information reference symbol.

The terminal further includes: a channel state information reporting unit, wherein,

and the channel state information reporting unit is used for feeding back the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal to the base station.

The channel state information reporting unit is configured to feed back, to the base station, the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal as follows:

when the channel state information reporting unit sends the channel state information on the virtual bandwidth of the terminal, the channel state information is a channel state information report set defined by an existing feedback mode x-y based on the virtual bandwidth configured to the terminal occupied by a subband set, wherein x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

and/or when the CSI reporting unit sends CSI on the system bandwidth of the terminal, the CSI is a CSI report set defined by an existing feedback mode x-y redefined as a virtual bandwidth based on a subband, where the feedback mode is periodic or aperiodic, x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

and/or when the terminal is not configured with virtual bandwidth allocation information and the CSI reporting unit reports CSI of system bandwidth, the CSI is a CSI report set defined by x-y in an existing feedback mode, where x is a positive integer greater than or equal to 1 and y is a positive integer greater than or equal to 0.

for some feedback modes, the channel state information reporting unit is used for reporting the channel state information on the virtual bandwidth, and for other feedback modes, the channel state information reporting unit is used for reporting the channel state information on the system bandwidth.

The terminal also comprises a downlink control signaling receiving unit; wherein,

the downlink control signaling receiving unit is configured to receive a downlink control signaling sent by a base station, where the downlink control signaling at least includes a resource allocation domain, and is configured to indicate allocation of resource blocks according to a system bandwidth and/or a virtual bandwidth.

The terminal further includes: a downlink data receiving unit and a downlink data processing unit; wherein,

the downlink data receiving unit is used for receiving downlink data sent by the base station;

and the downlink data processing unit is used for processing the received downlink data based on the downlink control signaling received by the downlink control signaling receiving unit.

and/or, indicating the allocation of resource blocks on a PDCCH according to the system bandwidth, and indicating the allocation of resource blocks on an ePDCCH according to the virtual bandwidth;

and/or indicating the allocation of the resource blocks for part of DCI formats according to the system bandwidth and indicating the allocation of the resource blocks for other DCI formats according to the virtual bandwidth;

A base station includes a first virtual bandwidth configuration information transmitting unit,

the first virtual bandwidth configuration information sending unit is configured to send virtual bandwidth configuration information to a terminal through a high-level configuration signaling, where the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether to use the virtual bandwidths, a system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N.

The virtual bandwidth configuration information sent by the first virtual bandwidth configuration information sending unit indicates that X virtual bandwidths corresponding to the terminal are:

wherein X is greater than or equal to 2.

The first virtual bandwidth configuration information sending unit is configured to send virtual bandwidth configuration information, where the virtual bandwidth configuration information indicates whether to use a virtual bandwidth as:

if the virtual bandwidth configuration information indicates that the virtual bandwidth is used, the downlink control signaling has information indicating X virtual bandwidths corresponding to the terminal, otherwise, the downlink control signaling does not have the information indicating the virtual bandwidth.

The base station further comprises: a channel state information reference symbol transmitting unit;

the channel state information reference symbol sending unit is used for sending the channel state information reference symbol to the terminal on the system bandwidth and/or the virtual bandwidth.

The base station further comprises: a channel state information receiving unit;

the channel state information receiving unit is used for receiving the channel state information on the system bandwidth and/or the virtual bandwidth sent by the terminal.

The channel state information receiving unit is configured to receive channel state information on a virtual bandwidth of the terminal, where the channel state information is a channel state information report set defined based on an existing feedback mode x-y in which a subband set occupies the virtual bandwidth configured for the terminal, where x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

and/or, when the CSI receiving unit is configured to receive CSI information over a system bandwidth of the terminal, the CSI information is a CSI report set defined by an existing feedback pattern x-y redefined as a virtual bandwidth based on a subband, where the feedback pattern is periodic or aperiodic, where x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

and/or when the base station is not configured with virtual bandwidth allocation information and the channel state information receiving unit is configured to receive channel state information CSI on the system bandwidth of the terminal, the channel state information is a CSI report set defined by an existing feedback mode x-y, where x is a positive integer greater than or equal to 1 and y is a positive integer greater than or equal to 0.

For a partial feedback mode, the channel state information receiving unit is configured to receive channel state information on a virtual bandwidth of the terminal, and for other feedback modes, the channel state information receiving unit is configured to receive channel state information on a system bandwidth of the terminal.

The base station also comprises a downlink control signaling sending unit,

the downlink control signaling sending unit is configured to send a downlink control signaling to a terminal, where the downlink control signaling at least includes a resource allocation domain, and is configured to indicate allocation of resource blocks according to a system bandwidth and/or a virtual bandwidth.

The base station further includes a second virtual bandwidth configuration information transmitting unit,

the second virtual bandwidth configuration information sending unit is configured to send the virtual bandwidth configuration information to one or more base stations adjacent to the base station through an X2 interface signaling.

The second virtual bandwidth configuration information sending unit is specifically configured to:

sending the virtual bandwidth configuration information of each terminal to one or more base stations adjacent to the base station through X2 interface signaling;

or combining the virtual bandwidth configuration information of all the terminals into a message special for one cell, and sending the message to one or more base stations adjacent to the base station through the signaling of an X2 interface.

A resource allocation system includes a terminal and a base station, wherein,

the terminal is the terminal;

the base station is the base station.

In the resource allocation method, system, and related apparatus of the embodiments of the present invention, a base station sends virtual bandwidth allocation information to a terminal through a high-level allocation signaling, where the virtual bandwidth allocation information indicates X virtual bandwidths corresponding to the terminal or indicates whether to use the virtual bandwidths, a system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N. The scheme of the embodiment of the invention can reduce the signaling overhead in the small cells by configuring the virtual bandwidth, supports the interference cooperation among the small cells, well supports the data transmission of the small cells under the condition of being compatible with the existing system and ensuring the consistency of transmission and feedback, and improves the frequency efficiency of the system.

Drawings

Fig. 1 is a schematic flow chart illustrating a resource allocation method according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a resource allocation method according to another embodiment of the present invention;

FIG. 3 is a flowchart illustrating a resource allocation method according to yet another embodiment of the present invention;

FIG. 4 is a flowchart illustrating a resource allocation method according to yet another embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to still another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a base station according to another embodiment of the present invention;

fig. 10 is a schematic structural diagram of a base station according to still another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a base station according to still another embodiment of the present invention;

fig. 12 is a schematic flowchart of a resource allocation method according to embodiment 1 of the present invention;

fig. 13 is a schematic diagram of a terminal according to embodiment 2 of the present invention;

fig. 14 is a schematic structural diagram of a base station according to embodiment 3 of the present invention.

Detailed Description

The basic idea of the invention is: the base station sends virtual bandwidth configuration information to a terminal through a high-level configuration signaling, wherein the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether the virtual bandwidths are used, the system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N.

An embodiment of the present invention provides a resource allocation method, as shown in fig. 1, the method includes:

step 101: the base station sends virtual bandwidth configuration information to a terminal through a high-level configuration signaling, wherein the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether the virtual bandwidths are used, the system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N. That is, the virtual bandwidth is the virtualized system bandwidth.

Here, the virtual bandwidth configuration information belongs to radio resource control RRC signaling.

Optionally, the virtual bandwidth configuration information indicates that X virtual bandwidths corresponding to the terminal are:

or the virtual bandwidth information indicates a virtual bandwidth corresponding to each channel state information interference measurement CSI IM resource of the terminal, and the number of the virtual bandwidths depends on the number of the CSI IM resources.

Wherein X is greater than or equal to 2.

Optionally, the virtual bandwidth configuration information indicates whether to use a virtual bandwidth as:

Wherein, the X virtual bandwidths mean that X is greater than or equal to 2 virtual bandwidths.

Optionally, the method further includes:

step 102: the base station sends the channel state information reference symbol to the terminal on the system bandwidth and/or the virtual bandwidth;

optionally, as shown in fig. 2, the method further includes:

step 103: a base station receives channel state information on a system bandwidth and/or a virtual bandwidth of a terminal;

optionally, the receiving, by the base station, channel state information on the system bandwidth and/or the virtual bandwidth of the terminal is:

when the base station receives CSI on the virtual bandwidth of the terminal, further, the CSI is a CSI report set defined by an existing feedback mode x-y configured to the virtual bandwidth of the terminal based on subband set occupancy (span), and the feedback mode is periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

When the base station receives CSI on the system bandwidth of the terminal, further, the CSI is a CSI report set defined by an existing feedback mode x-y redefined as a virtual bandwidth based on a subband, and the feedback mode is periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

And if the base station is not configured with the virtual bandwidth allocation information, the base station receives Channel State Information (CSI) on the system bandwidth of the terminal. The channel state information is a CSI report set defined by an existing feedback mode x-y, wherein x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0.

Optionally, for a part of feedback mode base stations, the channel state information on the virtual bandwidth of the terminal is received, and for other feedback mode base stations, the channel state information on the system bandwidth of the terminal is received.

And the subband set of the feedback mode related to the channel state information occupies a virtual bandwidth configured for the terminal.

In particular, the channel state information is a set of Channel State Information (CSI) reports defined for an existing feedback pattern x-y of the virtual bandwidth based on a set of subbands, the feedback pattern being periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

It should be noted that, if the base station does not configure and send virtual bandwidth configuration information to the terminal, the base station receives channel state information on the system bandwidth of the terminal, where the channel state information is a CSI report set defined by an existing feedback mode x-y.

Optionally, as shown in fig. 3, the method further includes:

step 102': and the base station sends a downlink control signaling to the terminal, wherein the downlink control signaling at least comprises a resource allocation domain and is used for indicating the allocation of resource blocks according to the system bandwidth and/or the virtual bandwidth.

Optionally, the resource allocation domain indicates allocation of resource blocks according to system bandwidth and/or virtual bandwidth as follows:

Optionally, as shown in fig. 4, the method further includes:

102": and the base station sends the virtual bandwidth configuration information to one or more base stations adjacent to the base station through the signaling of an X2 interface.

For example, the base station transmits the virtual bandwidth configuration information to one or more base stations adjacent to the base station through an information element IE item set on a load information message (load information message) of the X2 interface.

Specifically, the base station sends the virtual bandwidth configuration information of each terminal to one or more base stations adjacent to the base station through an X2 interface signaling; or, the base station combines the virtual bandwidth configuration information of all the terminals into a message dedicated to one cell, and sends the message to one or more base stations adjacent to the base station through signaling of an X2 interface.

The embodiment of the present invention further provides a terminal accordingly, as shown in fig. 5, the terminal includes: a virtual bandwidth configuration information receiving unit 501,

a virtual bandwidth configuration information receiving unit 501, configured to receive virtual bandwidth configuration information sent by a base station through a high-level configuration signaling, where the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether to use the virtual bandwidths, where a system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N.

Wherein X is greater than or equal to 2.

Optionally, the terminal further includes: a channel state information reference symbol receiving unit 502, a channel state information calculation unit 503, wherein,

a csi reference symbol receiving unit 502, configured to receive a csi reference symbol sent by a base station on a system bandwidth and/or a virtual bandwidth;

a channel state information calculating unit 503, configured to calculate channel state information on a system bandwidth and/or a virtual bandwidth of the terminal based on the received channel state information reference symbol.

Optionally, as shown in fig. 6, the terminal further includes a channel state information reporting unit 504,

a channel state information reporting unit 504, configured to feed back, to a base station, channel state information on a system bandwidth and/or a virtual bandwidth of the terminal according to a calculation result of the channel state information calculating unit 503, where a subband set of a feedback mode related to the channel state information occupies the virtual bandwidth configured for the terminal.

Optionally, the channel state information reporting unit is configured to feed back, to the base station, the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal as follows:

Optionally, the terminal further includes a downlink control signaling receiving unit 502',

a downlink control signaling receiving unit 502' is configured to receive a downlink control signaling sent by a base station, where the downlink control signaling at least includes a resource allocation domain, and is used to indicate allocation of resource blocks according to a system bandwidth and/or a virtual bandwidth.

Optionally, as shown in fig. 7, the terminal further includes a downlink data receiving unit 503 'and a downlink data processing unit 504'; wherein,

a downlink data receiving unit 503' is configured to receive downlink data sent by the base station.

A downlink data processing unit 504' is configured to process the received downlink data based on the received downlink control signaling.

It should be noted that the downlink control signaling receiving section 502 ', the downlink data receiving section 503 ' and the downlink data receiving section 504 ' may be provided based on fig. 6, and are not limited to the case shown in fig. 7.

The embodiment of the present invention further provides a base station accordingly, as shown in fig. 8, the base station includes: a first virtual bandwidth configuration information transmitting unit 801,

a first virtual bandwidth configuration information sending unit 801, configured to send virtual bandwidth configuration information to a terminal through a high-level configuration signaling, where the virtual bandwidth configuration information indicates X virtual bandwidths corresponding to the terminal or indicates whether to use the virtual bandwidths, a system bandwidth of the terminal is divided into N sub-bandwidths, one virtual bandwidth corresponding to the terminal is composed of K sub-bandwidths, K, N and X are positive integers greater than or equal to 1, and K is less than N.

Optionally, the virtual bandwidth configuration information sent by the first virtual bandwidth configuration information sending unit indicates that X virtual bandwidths corresponding to the terminal are:

Wherein X is greater than or equal to 2. Optionally, the first virtual bandwidth configuration information sending unit is configured to send virtual bandwidth configuration information, where the virtual bandwidth configuration information indicates whether to use a virtual bandwidth as:

Optionally, the base station further includes: a channel state information reference symbol transmitting unit 802,

a channel state information reference symbol sending unit 802, configured to send the channel state information reference symbol to the terminal over the system bandwidth and/or the virtual bandwidth.

Optionally, as shown in fig. 9, the base station further includes a channel state information receiving unit 803,

a channel state information receiving unit 803, configured to receive channel state information on a system bandwidth and/or a virtual bandwidth, which is sent by a terminal, where a subband set of a feedback mode related to the channel state information occupies the virtual bandwidth configured for the terminal.

Optionally, when the channel state information receiving unit is configured to receive the channel state information on the virtual bandwidth of the terminal, the channel state information is a channel state information report set defined based on an existing feedback mode x-y in which a subband set occupies the virtual bandwidth configured for the terminal, where x is a positive integer greater than or equal to 1, and y is a positive integer greater than or equal to 0;

Optionally, for a partial feedback mode, the channel state information receiving unit is configured to receive channel state information on a virtual bandwidth of the terminal, and for other feedback modes, the channel state information receiving unit is configured to receive channel state information on a system bandwidth of the terminal.

Optionally, as shown in fig. 10, the base station further includes a downlink control signaling sending unit 802',

a downlink control signaling sending unit 802' configured to send a downlink control signaling to a terminal, where the downlink control signaling at least includes a resource allocation field, and is used to indicate allocation of resource blocks according to a system bandwidth and/or a virtual bandwidth.

It should be noted that the downlink control signaling sending unit may also be configured based on fig. 9, and the embodiments described in the present invention may be combined with each other.

Optionally, as shown in fig. 11, the base station further includes a second virtual bandwidth configuration information sending unit 802 ",

a second virtual bandwidth configuration information sending unit 802 ″ configured to send the virtual bandwidth configuration information to one or more base stations adjacent to the base station through the X2 interface signaling.

For example, an INFORMATION element IE item set on a LOAD INFORMATION message (LOAD INFORMATION message) through the X2 interface is transmitted to one or more base stations adjacent to the base station.

Optionally, the second virtual bandwidth configuration information sending unit is specifically configured to:

The embodiment of the invention also correspondingly provides a resource allocation system, which comprises a terminal and a base station, wherein,

the terminal is a terminal shown in any one of fig. 5 to 7;

the base station is the base station shown in any one of fig. 8 to 11.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Example 1

Fig. 12 is a schematic flowchart of a resource allocation method according to embodiment 1 of the present invention, where the method is applied to a base station, and as shown in fig. 12, the method specifically includes:

s1201, the base station configures and sends the virtual bandwidth configuration information to the terminal.

Here, the virtual bandwidth configuration information is used to indicate one or more virtual bandwidths corresponding to the terminal.

Further, the virtual bandwidth configuration information configures a virtual bandwidth for the terminal, wherein a virtual bandwidth is composed of K sub-bandwidths and belongs to a radio resource control RRC signaling; the system bandwidth corresponding to the terminal is divided into N sub-bandwidths, each sub-bandwidth is composed of a plurality of physical resource blocks, K is a positive integer larger than or equal to 1, N is a positive integer larger than 1, and K is smaller than N.

This embodiment provides a specific non-COMP example, where a system bandwidth is 20M, the system bandwidth may be uniformly divided into 5 4M sub-bandwidths, where a base station has only one virtual bandwidth, the 4M sub-bandwidth is defined as one virtual bandwidth, virtual bandwidth configuration information indicates that a terminal corresponds to K ═ 1 virtual bandwidths, the virtual bandwidth configuration information may be represented by a bitmap, and if the bitmap is (10000), the virtual bandwidth of the terminal occupies a first sub-band, it is noted that the virtual bandwidth is specific to the terminal, and the system bandwidth is specific to a cell.

This embodiment may also give a specific example of COMP, where a system bandwidth is 20M, the system bandwidth may be uniformly divided into 5 4M sub-bandwidths, and the 4M sub-bandwidth is defined as a virtual bandwidth, where a base station has two remote radio units RRH, the base station has two virtual bandwidths, the virtual bandwidth configuration information indicates that a terminal corresponds to K ═ 2 virtual bandwidths, and the virtual bandwidth configuration information may be represented by a bit map bitmap, and if the bit map is (10100), the base station indicates that the first virtual bandwidth of the terminal occupies the first sub-band and the second virtual bandwidth occupies the third sub-band, and it is noted that the virtual bandwidth is specific to the terminal, and the system bandwidth is specific to the cell.

It should be noted that, in the final standard, the virtual bandwidth may also retain the name of the system bandwidth, in this case, the system bandwidth obtained by the configuration of the higher layer signaling (RRC, radio resource management) is the virtual bandwidth, and the real system bandwidth is obtained at the time of initial access. The invention also protects the situation that the form is changed and the nature is not changed.

S1202, the base station sends the virtual bandwidth configuration information to one or more base stations adjacent to the base station through an X2 interface.

Specifically, the base station sends the virtual bandwidth configuration INFORMATION to one or more base stations adjacent to the base station through an INFORMATION element IE item set in a LOAD INFORMATION message of the X2 interface. Sending the virtual bandwidth configuration information of each terminal to one or more base stations adjacent to the base station through X2 interface signaling; the virtual bandwidth configuration information of each terminal is a bitmap; the base station sends the bit bitmap of all users of the base station to one or more adjacent base stations through an X2 interface.

This embodiment gives a specific non-COMP example, and following the assumption of the previous example, the base station has one UE with a bitmap of (10000), and the base station also has a second user below the base station with a bitmap of (00001), and the base station has only two users. Finally, the base station informs the adjacent base station of two bit maps (10000) and (00001), so that the adjacent base station can not use the 1 st and 5 th sub-bandwidths, thereby realizing interference avoidance. Or combining the virtual bandwidth configuration information of all the terminals into a message special for one cell, and sending the message to one or more base stations adjacent to the base station through the signaling of an X2 interface. The virtual bandwidth configuration information of each terminal is a bitmap, and assuming that the base station has two users, the base station combines the two bitmaps into one bitmap and sends the bitmap to an adjacent base station through an X2 interface. Wherein, the merging may be adding bit by bit and judging that is greater than 0, forming a merged bitmap.

This embodiment gives a specific non-COMP example, and following the assumption of the previous example, the base station has one UE with a bitmap of (10000), and the base station also has a second user below the base station with a bitmap of (00001), and the base station has only two users. Finally, the base station combines two bitmaps (10000) and (00001) to form a bitmap (10001) specific to a cell and informs an adjacent base station, so that the adjacent base station can not use the 1 st and 5 th sub-bandwidths, thereby realizing interference avoidance.

The base stations of a plurality of small cells are put together, so that cell interference is easy to generate, different virtual bandwidths are configured for terminals belonging to the base stations by the base stations of different small cells, and the base stations of the plurality of small cells can share the allocation information of the respective virtual bandwidths according to the above X2 interface signaling, so that the interference among the base stations of the small cells can be well coordinated.

S1203, the base station sends a channel state information reference symbol to the terminal over a full bandwidth (system bandwidth) or the virtual bandwidth.

Here, one case is that the CSI-RS may be transmitted in full bandwidth, i.e., CSI-RS measurement reference signals are transmitted for each RB; alternatively, the CSI-RS may be transmitted only on the configured virtual bandwidth with K ═ 1, that is, there is a CSI-RS sounding reference signal for each RB on the virtual bandwidth only.

And S1204, the base station receives the channel state information of the full bandwidth and/or the virtual bandwidth from the terminal.

In the existing standard, the periodic feedback modes comprise a mode 1-1, a mode 2-1, a mode 1-0, a mode 2-0 and the like; the aperiodic feedback mode includes mode 1-2, mode 2-2, mode 3-1, mode 1-0, mode 2-0, mode 3-0, and the like; the feedback pattern x-y comprises at least one of the above feedbacks.

In the prior art, the feedback modes are defined on a subband set, and the subband set occupies the whole system bandwidth.

In addition, it should be noted that the CSI received by the base station may be CSI of the entire system bandwidth and/or CSI of each virtual bandwidth of the entire system bandwidth.

Still further, the channel state information is a CSI report set defined for an existing feedback pattern x-y of the virtual bandwidth based on subband redefinition, the feedback pattern being periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

In the Mode x-y, x represents CQI feedback, 1 represents Wideband (Wideband) CQI feedback, 2 represents Subband (Subband) CQI feedback, and 3 represents higher-layer configured CQI feedback. y denotes PMI feedback, 0 denotes no PMI, 1 denotes a single PMI, and 2 denotes a plurality of PMIs.

The basic frequency domain units of the feedback modes in the prior art are all sub-bands, whereas the basic frequency domain units of the feedback modes in the present invention are all required to be one sub-bandwidth.

Further, the channel state information is wideband channel state information CSI defined on a virtual bandwidth, and includes at least one of: RI, wideband PMI, wideband CQI.

And if the base station does not configure and send the high-level configuration signaling to the terminal, the base station receives Channel State Information (CSI) on the system bandwidth of the terminal. Wherein the channel state information is a CSI report set defined by an existing feedback mode x-y.

That is, when the configuration has no virtual bandwidth configuration signaling, the terminal simultaneously supports the existing feedback mode. Therefore, the invention can ensure that the terminal can realize semi-static switching between the feedback mode based on the system bandwidth and the feedback mode based on the virtual bandwidth.

S1205, the base station sends a downlink control signaling to the terminal, and the downlink control signaling at least comprises a resource allocation domain and is used for indicating allocation of resource blocks according to a system bandwidth and/or a virtual bandwidth.

And the base station sends a downlink control signaling to the terminal, the resource allocation domain of the downlink control signaling is default, and the default terminal occupies all resources on the virtual bandwidth.

And the base station sends a downlink control signaling to the terminal, wherein the downlink control signaling at least comprises a resource allocation domain, indicates the allocation of resource blocks in a public search space according to the system bandwidth, and indicates the allocation of the resource blocks in a special search space according to the virtual bandwidth.

The base station sends a downlink control signaling to the terminal, the downlink control signaling at least comprises a resource allocation domain, the allocation of resource blocks is indicated on a physical downlink control channel PDCCH according to a system bandwidth, and the allocation of the resource blocks is indicated on an enhanced physical downlink control channel ePDCCH according to a virtual bandwidth.

And the base station sends a downlink control signaling to the terminal, wherein the downlink control signaling at least comprises a resource allocation domain, indicates the allocation of resource blocks for one part of downlink control information Format DCI Format according to the system bandwidth, and indicates the allocation of the resource blocks for the other part of downlink control information Format DCI Format according to the virtual bandwidth.

Specifically, the DCI Format1A/0 uses full bandwidth scheduling, and the DCI Format2C/2D/2E/4/4A uses virtual bandwidth scheduling;

and the base station sends a downlink control signaling to the terminal, wherein the downlink control signaling at least comprises a resource allocation domain, the allocation of the resource blocks is indicated on one part of the subframe set according to the system bandwidth, and the allocation of the resource blocks is indicated on the other part of the subframe set according to the virtual bandwidth. For example, in the case of eICIC, the terminal is scheduled according to the full bandwidth on the non-ABS subframe, and the terminal is scheduled according to the virtual bandwidth on the non-ABS subframe.

By adopting the method of the embodiment, on the basis of better compatibility with the existing transmission and feedback, on one hand, the overhead of downlink control signaling and uplink feedback signaling is remarkably reduced, on the other hand, the inter-cell interference can be effectively inhibited, and the performance of edge users is ensured.

Example 2

Fig. 13 is a schematic diagram of a terminal according to embodiment 2 of the present invention, and as shown in fig. 13, the terminal at least includes:

a high-level configuration information receiving unit, configured to receive virtual bandwidth high-level configuration information sent by a base station, where the virtual bandwidth configuration information is used to indicate one or more pieces of virtual bandwidth information corresponding to the terminal;

Here, assuming that the system bandwidth is 20M, the system bandwidth may be uniformly divided into 4 sub-bandwidths of 5M, the base station defines the 5M sub-bandwidth as one virtual bandwidth, and the virtual bandwidth configuration information indicates that one terminal corresponds to K ═ 1 virtual bandwidth, and the virtual bandwidth configuration information may be represented by a bitmap, note that the virtual bandwidth is specific to the terminal, and the system bandwidth is specific to the cell.

It should be noted that, in the final standard, the virtual bandwidth may also retain the name of the system bandwidth, in this case, the system bandwidth obtained by the higher layer signaling (RRC, radio resource management) configuration is the virtual bandwidth, and the real system bandwidth is obtained at the time of initial access. The invention also protects the situation that the form is changed and the nature is not changed.

A measurement reference signal receiving unit, configured to receive a channel state information reference symbol sent by the base station over a full bandwidth or over the virtual bandwidth.

And a channel state information calculation unit calculating channel state information over the entire bandwidth and/or over the virtual bandwidth based on the measurement reference signal.

And the channel state information reporting unit is used for reporting the obtained channel state information to the base station.

Still further, the channel state information is a CSI report set defined based on an existing feedback pattern x-y of a subband set occupying (span) virtual bandwidth configured to the terminal, the feedback pattern being periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

In the existing standard, the periodic feedback modes comprise a mode 1-1, a mode 2-1, a mode 1-0, a mode 2-0 and the like; the aperiodic feedback mode includes mode 1-2, mode 2-2, mode 3-1, mode 1-0, mode 2-0, mode 3-0, and the like; the feedback pattern x-y comprises at least one of the above feedbacks;

And the computing unit acquires the channel state information CSI of each virtual bandwidth on the whole system bandwidth.

Still further, the channel state information is a CSI report set defined based on an existing feedback pattern x-y of subbands defined as a virtual bandwidth, the feedback pattern being periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

And if the base station does not configure the virtual bandwidth configuration information to the terminal, the computing unit acquires Channel State Information (CSI) on the whole system bandwidth. And, the channel state information is a CSI report set defined by an existing feedback pattern x-y.

And the downlink control signaling receiving unit is used for receiving the downlink control signaling sent by the base station.

For the downlink control signaling receiving unit, the method is characterized in that:

and the downlink control signaling receiving unit receives the downlink control signaling sent by the base station, wherein the downlink control signaling at least comprises a resource allocation domain and is used for indicating the allocation of resource blocks according to the virtual bandwidth.

And a downlink control signaling receiving unit receives a downlink control signaling sent by the base station, wherein the resource allocation domain of the downlink control signaling is default, and the default terminal occupies all resources on the virtual bandwidth.

And the downlink control signaling receiving unit receives downlink control signaling sent by the base station, wherein the downlink control signaling at least comprises a resource allocation domain, indicates the allocation of resource blocks according to the system bandwidth in a public search space, and indicates the allocation of the resource blocks according to the virtual bandwidth under the condition that the system bandwidth is replaced by the virtual bandwidth in a special search space.

And a downlink control signaling receiving unit receives a downlink control signaling sent by the base station, wherein the downlink control signaling at least comprises a resource allocation domain, the allocation of resource blocks is indicated on a physical downlink control channel PDCCH according to a system bandwidth, and the allocation of the resource blocks is indicated on an enhanced physical downlink control channel ePDCCH according to a virtual bandwidth.

And a downlink control signaling receiving unit receives a downlink control signaling sent by the base station, wherein the downlink control signaling at least comprises a resource allocation domain, indicates the allocation of resource blocks on a physical downlink control channel PDCCH according to the system bandwidth, and indicates the allocation of the resource blocks on an enhanced physical downlink control channel ePDCCH according to the virtual bandwidth under the condition that the system bandwidth is replaced by the virtual bandwidth.

And the downlink control signaling receiving unit receives the downlink control signaling sent by the base station, wherein the downlink control signaling at least comprises a resource allocation domain, indicates the allocation of resource blocks for a part of downlink control information Format DCI formats according to the system bandwidth, and indicates the allocation of the resource blocks for another part of downlink control information Format DCI formats according to the virtual bandwidth.

Specifically, the DCI Format1A/0 corresponds to a full bandwidth, and the DCI Format2C/2D/2E/4/4A corresponds to a virtual bandwidth;

and a downlink control signaling receiving unit receives downlink control signaling sent by the base station, wherein the downlink control signaling at least comprises a resource allocation domain, the allocation of the resource blocks is indicated on one part of the subframe set according to the system bandwidth, and the allocation of the resource blocks is indicated on the other part of the subframe set according to the virtual bandwidth under the condition that the system bandwidth is replaced by the virtual bandwidth.

Furthermore, the terminal according to this embodiment further includes the following modules:

and the downlink data receiving unit is used for receiving the downlink data sent by the base station.

And the downlink data processing unit is used for processing the downlink data based on the downlink control signaling.

Example 3

Fig. 14 is a schematic structural diagram of a base station according to embodiment 3 of the present invention, and as shown in fig. 14, the base station at least includes:

a high-level configuration information configuration and sending unit, configured to send virtual bandwidth high-level configuration information to a terminal, where the virtual bandwidth configuration information is used to indicate a virtual bandwidth corresponding to the terminal. The system bandwidth corresponding to the terminal is divided into N sub-bandwidths, each sub-bandwidth is composed of a plurality of physical resource blocks, and the sub-bandwidths are virtual bandwidths. Wherein K is a positive integer greater than or equal to 1, N is a positive integer greater than 1, and K < N.

And the measurement reference signal sending unit is used for sending the channel state information reference symbols to the terminal on the full bandwidth or the virtual bandwidth.

And the channel state information receiving unit is used for receiving the channel state information on the whole bandwidth and/or the virtual bandwidth.

The channel state information receiving unit is used for receiving the channel state information CSI on the virtual bandwidth of the terminal.

Still further, the channel state information is a CSI report set defined for an existing feedback pattern x-y of a virtual bandwidth based on a set of subbands, the feedback pattern being periodic or aperiodic. Wherein x is a positive integer of 1 or more, and y is a positive integer of 0 or more.

The channel state information receiving unit is used for channel state information CSI of each virtual bandwidth on the whole system bandwidth.

And if the base station does not configure and send the high-level configuration signaling to the terminal, the channel state information receiving unit is used for receiving Channel State Information (CSI) on a system bandwidth of the terminal. Wherein the channel state information is a CSI report set defined by an existing feedback mode x-y.

And the downlink control signaling sending unit is used for sending the downlink control signaling to the terminal.

Further, the base station according to this embodiment further includes: and the downlink data sending unit is used for sending the downlink data to the terminal.

For a channel state information receiving unit, characterized by:

a downlink control signaling sending unit, characterized in that:

the downlink control signaling sending unit is configured to send a downlink control signaling, where the downlink control signaling at least includes a resource allocation domain, and is configured to indicate allocation of resource blocks according to a virtual bandwidth.

The downlink control signaling sending unit is used for sending downlink control signaling to the terminal, the resource allocation domain of the downlink control signaling is default, and the default terminal occupies all resources on the virtual bandwidth.

The downlink control signaling sending unit is used for sending downlink control signaling to the terminal, the downlink control signaling at least comprises a resource allocation domain, the allocation of the resource blocks is indicated according to the system bandwidth in the public search space, and the allocation of the resource blocks is indicated according to the virtual bandwidth under the condition that the system bandwidth is replaced by the virtual bandwidth in the special search space.

The downlink control signaling sending unit is used for sending downlink control signaling to the terminal, the downlink control signaling at least comprises a resource allocation domain, the allocation of resource blocks is indicated on a physical downlink control channel PDCCH according to the system bandwidth, and the allocation of the resource blocks is indicated on an enhanced physical downlink control channel ePDCCH according to the virtual bandwidth under the condition that the system bandwidth is replaced by the virtual bandwidth.

The downlink control signaling sending unit is configured to send a downlink control signaling to the terminal, where the downlink control signaling at least includes a resource allocation domain, and indicates, for a part of the DCI formats of the downlink control information Format, allocation of resource blocks according to a system bandwidth, and for another part of the DCI formats of the downlink control information Format, allocation of resource blocks according to a virtual bandwidth under a condition that the system bandwidth is replaced with the virtual bandwidth.

the downlink control signaling sending unit is used for sending downlink control signaling to the terminal, the downlink control signaling at least comprises a resource allocation domain, the allocation of the resource blocks is indicated on one part of the subframe set according to the system bandwidth, and the allocation of the resource blocks is indicated on the other part of the subframe set according to the virtual bandwidth under the condition that the system bandwidth is replaced by the virtual bandwidth.

Further, the base station further includes an X2 interface signaling sending unit of virtual bandwidth configuration information, configured to send the virtual bandwidth allocation information to one or more base stations neighboring to the base station through an X2 interface.

Further, the X2 interface signaling sending unit of the virtual bandwidth allocation INFORMATION sends the virtual bandwidth allocation INFORMATION to one or more base stations neighboring the base station through an INFORMATION element IE item set on a LOAD INFORMATION message of the X2 interface.

When a plurality of small cell base stations are put together, cell interference is easy to generate, different virtual bandwidths are configured for terminals belonging to the base stations by the base stations of different small cells, and the base stations of the plurality of small cells can share the allocation information of the respective virtual bandwidths according to the above X2 interface signaling, so that the interference among the small cell base stations can be well coordinated.

The invention ensures the consistency of feedback and transmission by configuring and allocating virtual bandwidth for the terminal, reduces the overhead of uplink and downlink control signaling on the basis of being compatible with the existing system and standard, thereby improving the spectrum efficiency, and interacts the information of the virtual bandwidth through an X2 interface, thereby enabling the coordination of interference among cells. In summary, the embodiment of the present invention well supports transmission and feedback of small cells, well reduces signaling overhead under the condition of being compatible with the existing system and ensuring consistent transmission and feedback, improves the frequency efficiency of the system, and can support interference coordination between cells.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for resource allocation, the method comprising:

2. The method according to claim 1, wherein the virtual bandwidth configuration information indicates that X virtual bandwidths corresponding to the terminal are:

wherein X is greater than or equal to 2.

3. The method of claim 1, wherein the virtual bandwidth configuration information indicates whether to use virtual bandwidth as:

4. The method of claim 1, further comprising:

5. The method of claim 1, further comprising:

6. The method according to claim 5, wherein the base station receives the channel state information on the system bandwidth and/or the virtual bandwidth of the terminal as follows:

7. The method of claim 5, further comprising:

8. The method of claim 1, further comprising:

9. The method of claim 8, wherein the resource allocation field indicates allocation of resource blocks according to system bandwidth and/or virtual bandwidth as:

10. The method of claim 1, further comprising:

11. The method according to claim 10, characterized in that the method comprises in particular:

12. A terminal, characterized in that the terminal comprises a virtual bandwidth configuration information receiving unit,

13. The terminal according to claim 12, wherein the virtual bandwidth configuration information indicates that X virtual bandwidths corresponding to the terminal are:

wherein X is greater than or equal to 2.

14. The terminal of claim 12, wherein the virtual bandwidth configuration information indicates whether to use a virtual bandwidth as:

15. The terminal of claim 12, further comprising: a channel state information reference symbol receiving unit and a channel state information calculating unit, wherein,

16. The terminal of claim 15, further comprising: a channel state information reporting unit, wherein,

17. The terminal of claim 16, wherein the csi reporting unit is configured to feed back, to the base station, csi on the system bandwidth and/or the virtual bandwidth of the terminal, where the csi is:

18. The terminal of claim 16, wherein the csi reporting unit is configured to feed back, to the base station, csi on the system bandwidth and/or the virtual bandwidth of the terminal, where the csi is:

19. The terminal of claim 12, wherein the terminal further comprises a downlink control signaling receiving unit; wherein,

20. The terminal of claim 19, further comprising: a downlink data receiving unit and a downlink data processing unit; wherein,

21. The terminal according to claim 19, wherein the resource allocation field indicates allocation of resource blocks according to system bandwidth and/or virtual bandwidth as:

22. A base station, characterized in that the base station comprises a first virtual bandwidth configuration information transmitting unit,

23. The base station of claim 22, wherein the virtual bandwidth configuration information sent by the first virtual bandwidth configuration information sending unit indicates that X virtual bandwidths corresponding to the terminal are:

wherein X is greater than or equal to 2.

24. The base station of claim 22, wherein the first virtual bandwidth configuration information sending unit is configured to send virtual bandwidth configuration information, where the virtual bandwidth configuration information indicates whether to use a virtual bandwidth as:

25. The base station of claim 22, further comprising: a channel state information reference symbol transmitting unit;

26. The base station of claim 22, further comprising: a channel state information receiving unit;

27. The base station of claim 26,

28. The base station of claim 26,

29. The base station of claim 22, wherein the base station further comprises a downlink control signaling transmitting unit,

30. The base station according to claim 29, wherein the resource allocation field indicates allocation of resource blocks according to system bandwidth and/or virtual bandwidth as:

31. The base station of claim 22, wherein the base station further comprises a second virtual bandwidth configuration information transmitting unit,

32. The base station of claim 31, wherein the second virtual bandwidth configuration information sending unit is specifically configured to:

33. A resource allocation system, comprising a terminal and a base station, wherein,

the terminal is the terminal of any one of claims 12 to 21;

the base station of any one of claims 22 to 32.