CN108964865B

CN108964865B - Terminal receiving method and device

Info

Publication number: CN108964865B
Application number: CN201810973789.7A
Authority: CN
Inventors: 谭舒
Original assignee: Keen Chongqing Microelectronics Technology Co ltd
Current assignee: Keen Chongqing Microelectronics Technology Co ltd
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2022-02-22
Anticipated expiration: 2038-08-24
Also published as: CN108964865A

Abstract

In order to solve the problem that the robustness of downlink receiving performance is poor in the cell scene supporting the cell reference signal interference suppression based on the network in the prior art, the invention provides a target terminal receiver method capable of guaranteeing the robustness of the downlink receiving performance in the cell scene supporting the cell reference signal interference suppression based on the network, which comprises the following steps of judging whether a cell supports NW _ CRS _ IM; a cell time and frequency synchronization control step; measuring adjacent cells; and (3) processing the downlink enhanced receiver. The terminal receiving method supporting the cell reference signal interference suppression based on the network can achieve the purpose of guaranteeing the robustness of the downlink receiving performance in all application scenes whether NW _ CRS _ IM is activated or not.

Description

Terminal receiving method and device

Technical Field

The application relates to the field of mobile communication, in particular to a terminal receiving method and device.

Background

Since Rel-8, the Long Term Evolution (LTE) system introduced a cell-specific reference signal (CRS) design, and its serving objects include, but are not limited to, time/frequency synchronization, channel estimation, radio resource management, etc. For self-calibration, cell reference signals always exist in all subframes (time domain dimension) of downlink-supported Physical Downlink Shared Channel (PDSCH) transmission according to a predetermined resource mapping rule, and are distributed in the complete system bandwidth (frequency domain dimension). See 3GPP TS 36.211 section 6.10.1 for more details.

However, since CRS is transmitted in a network independent of traffic bearers, considerable inter-cell interference may be introduced in the wireless network. For example, the current cell has no active user, that is, there is no service bearer, but the CRS is continuously transmitted according to the fixed time-frequency mapping rule without any benefit, but its power radiation may introduce fixed interference to other neighboring cells, which affects the cell edge user experience. If less CRS transmission can be realized, the reduction of the inter-cell interference level can be obviously brought, so that the user experience is improved, and the improvement is particularly obvious under the condition of medium and low network load and in the service scene of a high-order modulation mode. Further, the default existing CRS transmission means that the base station transmitter needs to operate continuously, and also introduces a loss of power consumption under the condition of medium and low network load.

In view of this, 3GPP introduces a "network-based cell reference signal interference suppression" characteristic in Rel-15, aiming to reduce CRS transmission frequency as much as possible and reduce inter-cell interference.

"network-based cell reference signal interference mitigation" (for short, NW _ CRS _ IM) has the following characteristics:

1. for a Machine Type Communication (MTC) terminal (terminal for short) in a half-duplex working mode (HD-FDD for short), except that CRSs are transmitted according to a complete system bandwidth in an uplink transmission interval, CRSs of base stations in other uplink transmission periods are all transmitted only in central 6 frequency domain resource blocks (RBs for short), namely the CRSs except the central 6 RBs are muted;

2. in the idle state of the terminal, in a paging occasion, a system message transmission period, a downlink message transmission period in the random access process and a newly introduced preheating/cooling period, the CRS of the base station continuously keeps transmitting the complete system bandwidth; specifically, when the terminal capability class is Cat-M2 (see the detailed description of 3GPP TS 36.306), in the random access transmission period, the training tone signal transmission period, and the physical uplink control channel/physical uplink traffic channel transmission period, the CRS of the base station is transmitted only in the center 24 RB; in other scenarios, the CRS of the base station tends to be transmitted only within the center 6RB, i.e., CRS is muted outside the center 6 RB;

3. in a terminal connection state, in a non-interval reception (DRX) period, a DRX activation period, a downlink message transmission period in a random access process, a Reference Signal Time Difference (RSTD) measurement opportunity and other periods, the CRS of the base station continuously keeps transmitting the complete system bandwidth; in other scenarios, the CRS of the base station tends to be transmitted only in the central 6 frequency domain Resource Blocks (RBs), i.e., the CRS is muted outside the central 6 RBs;

4. in the aspect of neighbor cell measurement, according to the configuration of 'AllowedMeasBandwidth', besides the effect of wideband-reference signal received quality (WB-RSRQ), the CRS of the base station tends to be sent only in the central 6 frequency domain Resource Blocks (RBs), that is, the CRS is muted except for the central 6 RB;

from the above information, NW _ CRS _ IM inevitably brings local experience back-off while reducing the inter-cell interference level. Taking the neighboring cell measurement as an example, because the terminal cannot know whether the neighboring cell has the activated NW _ CRS _ IM, when the terminal does not trigger WB-RSRQ measurement, even if the "AllowedMeasBandwidth" configuration exists, the terminal can only perform the neighboring cell measurement with the most appropriate central 6 frequency domain resource blocks, which will cause the loss of the terminal measurement accuracy or timeliness in the scene that the NW _ CRS _ IM network is not actually started, resulting in the degradation of mobility experience. For example, in downlink reception performance, a terminal enhanced receiver usually performs CRS fixed full-bandwidth transmission by assuming that CRS is transmitted, and introduces enhancement technologies including cell reference signal interference suppression (CRS-IM for short), control channel interference suppression (CCIM for short) and the like to suppress CRS interference in a neighboring cell, and when NW _ CRS _ IM occurs but a terminal is not processed, the CRS-IM/CCIM enhancement technology may bring negative effects (performance loss 1-2 dB); on the contrary, when the NW _ CRS _ IM is not actually generated but the terminal processes as it is, the performance gain of the original enhanced receiver cannot be obtained. In summary, the user experience is significantly impaired as soon as the NW _ CRS _ IM information is not accurately known.

In view of this, 3GPP is also discussing informing the CRS silence information of the terminal network by adding broadcast signaling (applicable to idle terminals) and dedicated signaling (applicable to connected terminals). However, conditions of CRS silence are complicated, so it is very difficult to obtain the most accurate information in real time, and the signaling method will bring very high network and terminal processing burden to improve the information accuracy. Taking the neighbor measurement as an example, even if the terminal knows that the neighbor has the activated NW _ CRS _ IM, the neighbor may just have the activated traffic (or satisfy the foregoing other condition of not triggering CRS muting), CRS muting does not actually occur, and the measurement may be implemented in the "AllowedMeasBandwidth" configuration without the fallback center 6 RB.

Disclosure of Invention

In order to solve the problem of poor robustness of downlink receiving performance in the cell scene supporting the interference suppression of the network-based cell reference signal in the prior art, the invention provides a target terminal receiver method capable of ensuring the robustness of the downlink receiving performance in the cell scene supporting the interference suppression of the network-based cell reference signal, which comprises the following steps,

judging whether the cell supports NW _ CRS _ IM;

a cell time and frequency synchronization control step;

measuring adjacent cells;

and (3) processing the downlink enhanced receiver.

Preferably, the determining whether the cell supports NW _ CRS _ IM includes,

judging whether the cell supports NW _ CRS _ IM according to the 3GPP version of the cell;

or,

judging whether the cell supports NW _ CRS _ IM according to whether the cell system message carries NW _ CRS _ IM function extension item information or not;

or,

and judging whether the cell supports NW _ CRS _ IM according to whether the cell special bearing message carries NW _ CRS _ IM function extension item information.

Preferably, the determining whether the cell supports NW _ CRS _ IM includes,

and if the cell can not be judged to support the NW _ CRS _ IM, setting the cell to support the NW _ CRS _ IM.

Preferably, the cell time and frequency synchronization controlling step includes,

and judging whether the current terminal CAT capability level is Cat-M1, if so, executing the cell time and frequency synchronization control step by adopting a conventional mode.

recombining the cell reference signals and acquiring cell reference signal copies;

if the system bandwidth of the cell is less than or equal to the system bandwidth of 5MHz, the 1.4MHz system bandwidth and the copy of the system bandwidth of the cell are adopted to carry out the estimation of the relative signal quality index of the cell, the time synchronization estimation and the frequency synchronization estimation and obtain the estimation result information,

if the system bandwidth of the cell is larger than the system bandwidth of 5MHz, respectively adopting the system bandwidth of 1.4MHz and the system bandwidth copy of the cell and/or the system bandwidth copy of 5MHz to carry out estimation of relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and obtain estimation result information;

and selecting the time synchronization estimation result information and the frequency synchronization estimation result information with the dominant signal quality index for the time and frequency synchronization control of the receiver.

Preferably, the recombining the cell reference signals and acquiring the cell reference signal copies comprises,

if the terminal is at Cat-M2 capability level and the cell system bandwidth is greater than 5MHz, the reassembled object also contains a copy of the 5MHz system bandwidth.

Preferably, the recombining the cell reference signal and the obtaining the cell reference signal copy comprise,

and replacing the CRS in the central 6RB by the nearest CRS which does not belong to the central 6RB range and obtaining a recombined CRS system bandwidth copy and/or a 5MHz system bandwidth copy by taking the CRS antenna port as a unit symbol by symbol.

using CRS antenna ports as units, numbering CRS belonging to the center 6RB in ascending order according to frequency domain subcarriers symbol by symbol to form a reference signal array

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Reference signal recombination is performed.

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Reference signal recombination is performed.

and the CRS recombination mode of the cell system bandwidth copy and/or the 5MHz system bandwidth copy adopts original CRS information.

Preferably, the neighbor cell measuring step includes,

and judging whether the terminal is of Cat-M1 grade, if so, executing the adjacent cell measurement step in a conventional manner.

Preferably, the neighbor cell measuring step includes,

obtaining the AllowedMeasBandwidth configuration of the adjacent region, judging whether the AllowedMeasBandwidth is larger than mbw6, if so, continuing to execute the adjacent region measurement step, otherwise, limiting the adjacent region measurement bandwidth to the center 6RB and executing the adjacent region measurement step in a conventional mode;

performing CRS recombination on the adjacent region and obtaining a copy, wherein the recombination object at least comprises the copy of the AllowedMeasBandwidth indication bandwidth;

respectively adopting a 1.4MHz measurement bandwidth and an AllowedMeasBandwidth indication bandwidth copy and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and obtain measurement index information;

and selecting the measurement index information with the dominant signal quality index for actual neighbor measurement.

Preferably, the performing CRS restructuring on the neighboring cells and obtaining the replica, the restructuring object at least includes the replica of the AllowedMeasBandwidth indication bandwidth,

if the AllowedMeasBandwidth indicates a bandwidth greater than 5MHz, the reassembled object also contains a 5MHz copy of the system bandwidth. Preferably, the downlink enhanced receiver processing step includes,

judging whether the terminal supports a downlink enhanced receiver, if so, continuing to execute the processing step of the downlink enhanced receiver, and if not, ending the processing step of the downlink enhanced receiver;

receiving a cell downlink service subframe, respectively carrying out CRS recombination on each effective same-frequency adjacent cell and obtaining a copy before triggering CRS-IM and/or CCIM, wherein the recombination object at least comprises a copy of the same bandwidth as the system bandwidth of the cell;

respectively adopting a bandwidth copy with the same 1.4MHz measurement bandwidth and cell system bandwidth and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and obtain adjacent cell relative signal quality index estimation information;

and selecting a bandwidth copy with the dominant neighbor cell relative signal quality index estimation information as an actual working bandwidth of the effective same-frequency neighbor cell, and implementing downlink CRS-IM and/or CCIM enhanced reception by adopting the actual working bandwidth of the effective same-frequency neighbor cell.

Preferably, the downlink enhanced receiver processing step includes,

if the system bandwidth of the cell is larger than 5MHz, the recombination object also comprises a copy of the system bandwidth of 5 MHz.

Preferably, the downlink enhanced receiver processing step includes,

and if the terminal is of a Cat-M1 or Cat-M2 grade, the relative signal quality index estimation is only carried out in a narrow band or wide band range corresponding to the downlink service subframe of the received cell, and is only implemented by adopting bandwidth copies with the same cell system bandwidth.

Preferably, the downlink enhanced receiver processing step includes,

if the terminal is of Cat-M1 or Cat-M2 grade, judging whether a relative signal quality index obtained by adopting a bandwidth copy with the same system bandwidth of the cell exceeds the index th of the cell, if so, the actual working bandwidth of an effective same-frequency adjacent cell is the same as the cell, and if not, finishing the processing step of the downlink enhanced receiver;

and th is a relative signal quality index threshold, and the value range is-3 dB to-3 dB.

In order to ensure the implementation of the method, the invention also provides a terminal receiving device which comprises the following modules,

a judging module, configured to judge whether a cell supports NW _ CRS _ IM;

the synchronization module is used for cell time and frequency synchronization control;

the measuring module is used for measuring the adjacent area;

and the receiver processing module is used for processing the downlink enhanced receiver.

Preferably, the determining module determines whether the cell supports NW _ CRS _ IM according to the cell 3GPP release;

or,

the judging module judges whether the cell supports NW _ CRS _ IM according to whether the cell system message carries NW _ CRS _ IM function extension item information;

or,

the judging module judges whether the cell supports NW _ CRS _ IM according to whether the cell special bearing message carries NW _ CRS _ IM function extension item information.

Preferably, the determining module sets the cell to support NW _ CRS _ IM if it cannot determine whether the cell supports NW _ CRS _ IM.

Preferably, the synchronization module determines whether the current CAT capability level of the terminal is CAT-M1, and if so, the cell time and frequency synchronization control step is performed in a conventional manner.

Preferably, the synchronization module recombines the cell reference signal and obtains a cell reference signal copy;

if the system bandwidth of the cell is less than or equal to the system bandwidth of 5MHz, the synchronization module adopts the system bandwidth of 1.4MHz and the copy of the system bandwidth of the cell to carry out estimation of relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and acquire estimation result information,

if the system bandwidth of the cell is larger than the system bandwidth of 5MHz, the synchronization module respectively adopts the system bandwidth of 1.4MHz and the copy of the system bandwidth of the cell and/or the copy of the system bandwidth of 5MHz to carry out estimation of relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and obtain estimation result information;

and the synchronization module selects the time synchronization estimation result information and the frequency synchronization estimation result information with the dominant signal quality index for the time and frequency synchronization control of the receiver.

Preferably, the step of the synchronization module recombining the cell reference signal and acquiring the cell reference signal copy comprises,

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Reference signal recombination is performed.

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Reference signal recombination is performed.

Preferably, the measurement module determines whether the terminal is of Cat-M1 class, and if so, the neighbor measurement step is performed in a conventional manner.

Preferably, the measurement module obtains the AllowedMeasBandwidth configuration of the adjacent cell, judges whether the AllowedMeasBandwidth configuration is greater than mbw6, if so, continues to execute the adjacent cell measurement step, otherwise, the adjacent cell measurement bandwidth is limited to the center 6RB and executes the adjacent cell measurement step in a conventional manner;

the measurement module performs CRS recombination on the adjacent region and obtains a copy, and the recombination object at least comprises the copy of the AllowedMeasBandwidth indication bandwidth;

the measurement module respectively adopts a 1.4MHz measurement bandwidth and an AllowedMeasBandwidth indication bandwidth copy and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and acquire measurement index information;

the measurement module selects the measurement index information with the dominant signal quality index for actual neighbor measurement.

Preferably, the measurement module performs CRS restructuring on the neighboring cell and obtains a replica, and the restructured object at least includes a replica of the AllowedMeasBandwidth indicating bandwidth, and if the AllowedMeasBandwidth indicating bandwidth is greater than 5MHz, the restructured object further includes a replica of the system bandwidth of 5 MHz.

Preferably, the receiver processing module judges whether the terminal supports the downlink enhanced receiver, if so, the step of processing the downlink enhanced receiver is continuously executed, and if not, the step of processing the downlink enhanced receiver is ended;

a receiver processing module receives a cell downlink service subframe, before triggering CRS-IM and/or CCIM, CRS recombination is respectively carried out on each effective same-frequency adjacent cell and copies are obtained, and a recombination object at least comprises copies of the same bandwidth as the system bandwidth of a cell;

the receiver processing module respectively adopts a bandwidth copy with the same 1.4MHz measurement bandwidth and cell system bandwidth and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and acquire adjacent cell relative signal quality index estimation information;

and the receiver processing module selects a bandwidth copy with the dominant neighbor cell relative signal quality index estimation information as an actual working bandwidth of the effective same-frequency neighbor cell, and implements downlink CRS-IM and/or CCIM enhanced reception by adopting the actual working bandwidth of the effective same-frequency neighbor cell.

Preferably, if the system bandwidth of the cell is greater than 5MHz, the receiver processing module reorganization object further comprises a copy of the system bandwidth of 5 MHz.

Preferably, if the terminal is of Cat-M1 or Cat-M2 class, the estimation of the relative signal quality indicator is only performed in a narrow band or a wide band range corresponding to a downlink service subframe of the received cell, and is only performed by using bandwidth copies with the same system bandwidth of the cell.

Preferably, if the terminal is of Cat-M1 or Cat-M2 grade, the receiver processing module judges whether the relative signal quality index obtained by using the bandwidth copy with the same system bandwidth of the cell exceeds the index th of the cell, if so, the actual working bandwidth of the effective adjacent cell with the same frequency is the same as the cell, otherwise, the downlink enhanced receiver processing step is finished;

The invention has the beneficial effects that:

1. the terminal receiver method and the device of the invention do not need to introduce a complex NW _ CRS _ IM activation information signaling interaction flow into a network and a terminal when implementing the scenes of adjacent cell measurement, service cell time/frequency synchronization, downlink service reception and the like, and realize the optimal downlink reception performance by implementing self-adaptive CRS-based measurement and synchronization operation on the terminal side.

2. The terminal side implements adaptive measurement and synchronous operation based on the CRS, so that the optimal downlink receiving performance is realized, and the robustness of the downlink receiving performance is guaranteed.

3. The terminal receiving method supporting the cell reference signal interference suppression based on the network can realize the purpose of ensuring the robustness of the downlink receiving performance in all application scenes no matter whether NW _ CRS _ IM is activated or not.

4. The invention is particularly applicable in case of network switching on NW _ CRS _ IM and high traffic load. Generally, the higher the service load is, the more complicated the NW _ CRS _ IM activation condition is, but compared with the existing method, the higher the service load is, the more the capability of ensuring the robustness of the downlink receiving performance can be embodied.

Drawings

Fig. 1 is a diagram illustrating a conventional cyclic prefix mapping for downlink cell reference signal resources in the prior art.

Fig. 2 is a schematic diagram of an antenna port #0 and symbol #0 according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a two-antenna port #0 and a symbol #0 according to an embodiment of the invention.

Fig. 4 is a schematic diagram of a three antenna port #0 and a symbol #0 according to an embodiment of the present invention.

Fig. 5 is a processing flow chart of a terminal receiving method according to an embodiment of the present invention.

Detailed Description

One of the ideas for solving the problems in the background art is to judge whether a cell supports NW _ CRS _ IM, if so, recombine the reference signals according to the characteristics of the NW _ CRS _ IM, and perform time/frequency synchronization and downlink signal reception by using the recombined reference signal copies to realize better robustness of downlink reception performance.

The following describes each step of a terminal receiving method according to the present invention in detail.

As shown in fig. 5, the present invention provides a terminal receiving method comprising the steps of,

step a determines whether the cell supports NW _ CRS _ IM.

And step B, controlling the time and frequency synchronization of the cell.

And C, measuring the adjacent area.

Step D is a downstream enhanced receiver processing step.

The above steps will be specifically described below.

Step a, determining whether the cell supports NW _ CRS _ IM:

in this step, the terminal determines whether the current camping cell may support NW _ CRS _ IM? If yes, the execution is continued; otherwise, the current network does not support NW _ CRS _ IM, and the technical scheme of the invention does not need to be triggered to execute synchronization and neighbor cell measurement by adopting a conventional means.

In step a, the determination method includes but is not limited to:

1. whether the camped cell supports the 3GPP Rel-15 release.

2. And whether the resident cell system message carries an explicit NW _ CRS _ IM function extension item or not.

3. Whether the dedicated bearer message of the cell to camp on carries an explicit NW _ CRS _ IM function extension or not.

The above information can be recorded in detail in 36.331, which belongs to the known technology and is not described herein again;

particularly, when the system bandwidth of the resident cell is 1.4MHz, NW _ CRS _ IM is not supported by default;

particularly, when the terminal cannot absolutely confirm whether the current cell can support NW _ CRS _ IM, the subsequent steps are performed by default according to the current cell that can support NW _ CRS _ IM;

step B, cell time and frequency synchronization control step:

is the current terminal judged to be at Cat-M1 rating? If yes, the time/frequency synchronization control flow of the service cell in the step B is processed according to a conventional mode; if not, the execution is continued;

the method further comprises the following steps:

B1. performing CRS recombination on the service cell and obtaining a copy, wherein the recombination object at least comprises a system bandwidth copy of the service cell;

optionally, when the terminal is of a Cat-M2 capability class and the system bandwidth of the serving cell is greater than 5MHz, the reorganization object further includes a copy of the system bandwidth of 5 MHz;

optionally, CRS reconfiguration mode one (central 6RB direct copy) of CRS system bandwidth replica and/or 5MHz system bandwidth replica of the serving cell

In this step, the details of the first recombination method shown in fig. 2 are as follows:

B1.1.1. replacing CRS in the central 6RB by the nearest CRS which does not belong to the central 6RB range symbol by using a CRS antenna port as a unit to obtain a recombined CRS system bandwidth copy and/or a 5MHz system bandwidth copy;

optionally, CRS reconstruction of serving cell system bandwidth replica and/or 5MHz system bandwidth replica (central 6RB interpolation reconstruction)

In this step, as shown in fig. 3, the details of the second recombination method are as follows:

B1.2.1. using CRS antenna ports as units, numbering CRS belonging to the center 6RB in ascending order according to frequency domain subcarriers symbol by symbol to form a reference signal array

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

B1.2.2.

B1.2.3.

B1.2.4.

B1.2.5.

B1.2.6.

B.1.2.7.

Optionally, CRS rearrangement of serving cell system bandwidth replica and/or 5MHz system bandwidth replica (central 6RB interpolation reconstruction)

In this step, as shown in fig. 4, the details of the third processing in the recombination mode are as follows:

B1.3.1. using CRS antenna ports as units, numbering CRS belonging to the center 6RB in ascending order according to frequency domain subcarriers symbol by symbol to form a reference signal array

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

B1.3.2.

Optionally, the CRS reconfiguration mode of the serving cell system bandwidth replica and/or the 5MHz system bandwidth replica directly uses the original CRS information.

B2. Respectively using the 1.4MHz system bandwidth and the serving cell system bandwidth copy and/or the 5MHz system bandwidth copy to carry out the estimation of the relative signal quality index of the serving cell and the time/frequency synchronization estimation of the relative signal quality index of the serving cell;

when the system bandwidth of the service cell is less than or equal to the system bandwidth of 5MHz, the copy of the system bandwidth of 5MHz is not used any more;

in this step, the relative signal quality indicators include, but are not limited to, RSRQ, SINR, SNR, and the like; the estimation of the relative signal quality index and the estimation of the time/frequency synchronization are both the prior art and are not described herein again;

B3. selecting the time/frequency synchronization estimation which is superior to the relative signal quality index from the plurality of estimation results obtained in the step B2 for actual receiver time/frequency synchronization control; the relative signal quality index dominance means that the RSRQ or SINR or SNR estimated value is the highest;

step C, neighbor cell measurement:

in the step, judging whether the current terminal is of Cat-M1 grade, if so, processing the adjacent cell measurement flow in the step C according to a conventional mode; if not, continuing to execute;

the method further comprises the following steps:

step C1, acquiring the configuration of 'AllowedMeasBandwidth' of the adjacent region, and continuing to execute when the 'AllowedMeasBandwidth' is greater than mbw6 (namely, only the center 6 RB); if not, the adjacent area measurement bandwidth is limited to the center 6RB, and the adjacent area measurement is executed according to the conventional technology and is jumped out;

step C2., performing CRS recombination on the neighboring cell and obtaining a copy, wherein the recombination object at least contains the copy of the "AllowedMeasBandwidth" indication bandwidth;

optionally, when the "AllowedMeasBandwidth" indicates that the bandwidth is greater than 5MHz, the restructured object further contains a 5MHz system bandwidth copy;

the recombination mode in the step is the same as that in the step B;

step C3., using 1.4MHz measurement bandwidth and 'AllowedMeasBandwidth' indication bandwidth copy and/or 5MHz system bandwidth copy to implement adjacent cell relative signal quality index estimation and measurement index;

in this step, the relative signal quality indicators include, but are not limited to, RSRQ, SINR, SNR, and the like; desired measurement indicators include, but are not limited to, RSRP, RSRQ, etc.;

and C4, selecting the measurement index which belongs to the measurement index with the dominant relative signal quality index from the results obtained in the step C3 for reporting the actual adjacent cell measurement quantity.

Step D is a downstream enhanced receiver processing step.

The method further comprises the following steps:

step d1, determining whether the current terminal supports CRS-IM and/or CCIM and other downlink enhanced receivers? If yes, the execution is continued; otherwise, the processing flow is not applicable to the current terminal and jumps out;

step D2., receiving downlink service subframes of a service cell, before triggering CRS-IM and/or CCIM, respectively performing CRS recombination on each effective same-frequency adjacent region and obtaining a copy, wherein the recombined object at least comprises a copy of the same bandwidth as the system bandwidth of the service cell;

optionally, when the system bandwidth of the serving cell is greater than 5MHz, the reorganization object further includes a copy of the system bandwidth of 5 MHz;

the recombination mode in the step is the same as that in the step B;

d3, respectively using a bandwidth copy with the same 1.4MHz measurement bandwidth and serving cell system bandwidth and/or a 5MHz system bandwidth copy to estimate the relative signal quality index of the adjacent cell;

specifically, when the terminal is of Cat-M1 or Cat-M2 class, the relative signal quality index estimation is performed only in the Narrowband (short for Narrowband) or Wideband (short for Wideband) range (the definition of Narrowband/Wideband is detailed in 3GPP TS 36.211) corresponding to the downlink service subframe of the received serving cell, and is performed only using bandwidth copies with the same system bandwidth of the serving cell;

in this step, the relative signal quality indicators include, but are not limited to, RSRQ, SINR, SNR, and the like;

step D4., selecting the bandwidth copy with the dominance of D3 relative to the signal quality index as the actual working bandwidth of the effective same-frequency adjacent region

Particularly, when the terminal is of Cat-M1 or Cat-M2 grade, whether a relative signal quality index obtained by using a bandwidth copy with the same system bandwidth of a service cell exceeds the index th of the service cell is judged, and if yes, the actual working bandwidth of an effective same-frequency adjacent cell is the same as that of the service cell; if not, the adjacent regions with the same frequency are invalid and jump out;

wherein th is a relative signal quality index threshold, and the value range is-3 dB to 3 dB;

step D5. implements downlink CRS-IM and/or CCIM enhanced reception based on the actual operating bandwidth of the effective co-frequency neighbor.

Corresponding to the steps, the invention also provides a terminal receiving device, which comprises the following modules,

a judging module, configured to judge whether a cell supports NW _ CRS _ IM;

the measuring module is used for measuring the adjacent area;

The details of the present invention are described in the following description of the preferred embodiments.

The first embodiment is as follows:

the implementation scenario of the first preferred embodiment is that the Cat-M2 terminal is in an idle state in the 3GPP Rel-15 network.

Step A, the terminal judges whether the current resident cell can support NW _ CRS _ IM, if yes, the terminal continues to execute; if not, the current network does not support NW _ CRS _ IM, and the technical scheme of the invention does not need to be triggered.

In this embodiment, the camping cell supports the 3GPP Rel-15 version and the system bandwidth is 10MHz, but the camping cell does not carry the displayed NW _ CRS _ IM function extension item, and since the current terminal is in an idle state, it cannot be determined whether the neighboring cell triggers NW _ CRS _ IM, and it is default that the subsequent steps are executed according to that the current camping cell may support NW _ CRS _ IM;

step B, serving cell time/frequency synchronization control flow;

the method further comprises the following steps:

b1, performing CRS recombination on the serving cell and obtaining a copy, wherein the recombination object at least comprises a system bandwidth copy of the serving cell;

in this embodiment, the terminal is of a Cat-M2 capability class and the system bandwidth of the serving cell is greater than 5MHz, so the restructured object includes a 10MHz system bandwidth replica of the serving cell and a 5MHz system bandwidth replica of the serving cell

In this embodiment, the CRS of the serving cell CRS system bandwidth replica and the CRS of the 5MHz system bandwidth replica are recombined using a recombination mode one

b1.1.1, replacing CRS in the central 6RB with the nearest CRS which does not belong to the central 6RB range by using a CRS antenna port as a unit to obtain a recombined CRS system bandwidth copy and/or a 5MHz system bandwidth copy;

b2, respectively using the 1.4MHz system bandwidth and the serving cell system bandwidth copy and/or the 5MHz system bandwidth copy to carry out the estimation of the relative signal quality index of the serving cell and the time/frequency synchronization estimation of the serving cell;

in this embodiment, therefore, the 1.4MHz system bandwidth, the serving cell 10MHz system bandwidth replica, and the 5MHz system bandwidth replica are respectively used to perform the serving cell relative signal quality index estimation and the time/frequency synchronization estimation thereof

In this step, the relative signal quality index uses SINR; the estimation of the relative signal quality index and the estimation of the time/frequency synchronization are both the prior art and are not described herein again;

step B3, selecting the time/frequency synchronization estimation which is superior to the relative signal quality index in a plurality of estimation results obtained in the step B2 for actual receiver time/frequency synchronization control

In this embodiment, the actual network does not trigger NW _ CRS _ IM, so the estimation result of the relative signal quality indicator SINR dominance (i.e., the SINR estimation value is the highest) comes from the serving cell 10MHz system bandwidth replica;

step C, adjacent area measurement:

the method further comprises the following steps:

in this embodiment, the adjacent region "AllowedMeasBandwidth" is mbw25> mbw6, and the execution is continued;

in this step, "AllowedMeasBandwidth" indicates that the bandwidth is equal to 5MHz, and the restructured object only contains "AllowedMeasBandwidth" indicating a bandwidth replica;

the recombination mode in the step is the same as that in the step B;

in this embodiment, only 1.4MHz measurement bandwidth and "AllowedMeasBandwidth" are used to indicate a bandwidth 5MHz copy;

in this embodiment, the relative signal quality indicator uses SINR;

step C4, selecting the measurement index which belongs to the relative signal quality index dominance in the plurality of results obtained in the step C3 for the actual neighbor cell measurement quantity reporting

In this embodiment, the actual network does not trigger NW _ CRS _ IM, so the estimation result of the relative signal quality indicator SINR dominance (i.e., the SINR estimation value is the highest) comes from the neighbor cell "AllowedMeasBandwidth" indicating a 5MHz copy of the bandwidth;

step D downlink enhanced receiver processing flow

The method further comprises the following steps:

in this embodiment, the terminal does not support the downlink enhanced receiver, and thus jumps out;

example two:

the second implementation scenario of the preferred embodiment is that the Cat-1 terminal is in a connected state in the 3GPP Rel-15 network.

In this embodiment, the system bandwidth of the residential cell is 15MHz, and supports 3GPP Rel-15, and the dedicated bearer message carries an explicit NW _ CRS _ IM function extension, so that the current residential cell supports NW _ CRS _ IM and continues to execute;

step B, serving cell time/frequency synchronization control flow;

the method further comprises the following steps:

in this embodiment, the restructuring object is only a 15MHz system bandwidth replica of the serving cell;

in the embodiment, the system bandwidth copy of the CRS of the service cell is implemented in a second recombination mode;

optionally, CRS restructuring mode two (central 6RB interpolation reconstruction) of the system bandwidth replica of the serving cell

b1.2.1, numbering CRSs (common reference signals) belonging to the center 6RB in an ascending order according to frequency domain subcarriers to form a reference signal array

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

B1.2.2.

B1.2.3.

B1.2.4.

B1.2.5.

B1.2.6.

B.1.2.7.

B2, respectively using the 1.4MHz system bandwidth and the service cell 15MHz system bandwidth copies to carry out service cell relative signal quality index estimation and time/frequency synchronization estimation thereof;

in this step, the relative signal quality index uses SNR; the estimation of the relative signal quality index and the estimation of the time/frequency synchronization are both the prior art and are not described herein again;

In this embodiment, the actual network triggers NW _ CRS _ IM, so the estimation result of relative signal quality indicator SNR dominance (i.e., SNR estimation value is highest) comes from the 1.4MHz system bandwidth of the serving cell;

step C, measuring adjacent regions;

the method further comprises the following steps:

in this embodiment, the adjacent region "AllowedMeasBandwidth" is mbw75> mbw6, and the execution is continued;

in this embodiment, "AllowedMeasBandwidth" indicates that the bandwidth 15MHz is greater than 5MHz, and therefore the recombination object is "AllowedMeasBandwidth" indicates a bandwidth 15MHz system bandwidth replica and a bandwidth 5MHz system bandwidth replica;

the recombination mode in the step is the same as that in the step B;

in this embodiment, the bandwidth is measured using 1.4MHz, "AllowedMeasBandwidth" indicates a 15MHz copy of the bandwidth and a 5MHz copy of the system bandwidth;

in this embodiment, the relative signal quality indicator uses SNR;

In this embodiment, an actual network triggers NW _ CRS _ IM, but a Cat-M2 terminal is activated to work in an adjacent cell at this time, so that an estimation result of relative signal quality indicator SNR dominance (i.e., SNR estimation value is highest) comes from a 5MHz system bandwidth copy;

step D, the downlink enhanced receiver processing flow is as follows:

the method further comprises the following steps:

in the embodiment, the terminal supports CRS-IM and CCIM downlink enhanced receivers, so that the implementation is continued;

step D2., receiving a service cell downlink service subframe, before triggering CRS-IM, respectively implementing CRS recombination on each effective same-frequency adjacent cell and obtaining a copy, wherein the recombined object at least comprises a copy of the same bandwidth as the system bandwidth of the service cell;

in this embodiment, the system bandwidth of the serving cell is greater than 5MHz, so the restructured object includes a 15MHz system bandwidth replica of the serving cell and a 5MHz system bandwidth replica;

the recombination mode in the step is the same as that in the step B;

in the embodiment, the adjacent cell relative signal quality index estimation is implemented by using a 15MHz bandwidth copy and a 5MHz system bandwidth copy, which have the same 1.4MHz measurement bandwidth and the same service cell system bandwidth;

in this embodiment, the relative signal quality indicator uses SNR;

step D5. implements downlink CRS-IM and CCIM enhanced reception based on the actual working bandwidth of the effective co-frequency adjacent cell.

Example three:

the third implementation scenario of the preferred embodiment is that the Cat-4 terminal is in a connected state in the 3GPP Rel-15 network.

In this embodiment, the system bandwidth of the residential cell is 3MHz, and 3GPP Rel-15 is supported, and the dedicated bearer message carries an explicit NW _ CRS _ IM function extension, so that the current residential cell supports NW _ CRS _ IM and continues to execute;

step B, serving cell time/frequency synchronization control flow;

the method further comprises the following steps:

in this embodiment, the restructuring object is only a 3MHz system bandwidth replica of the serving cell;

in the embodiment, the system bandwidth copy of the CRS of the service cell is implemented in a third recombination mode;

B1.3.1. numbering CRSs (common reference signals) belonging to the center 6RB in an ascending order according to frequency domain subcarriers to form a reference signal array

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

B1.3.2.

B2, respectively using the 1.4MHz system bandwidth and the 3MHz system bandwidth copy of the service cell to estimate the relative signal quality index of the service cell and the time/frequency synchronization estimation of the service cell;

in this step, the relative signal quality indicator uses RSRQ; the estimation of the relative signal quality index and the estimation of the time/frequency synchronization are both the prior art and are not described herein again;

In this embodiment, the actual network does not trigger NW _ CRS _ IM, so the estimation result of relative signal quality indicator RSRQ dominance (i.e., RSRQ estimation value is highest) comes from the 3MHz system bandwidth of the serving cell;

step C, measuring adjacent regions;

the method further comprises the following steps:

in this embodiment, the adjacent region "AllowedMeasBandwidth" is mbw15> mbw6, and the execution is continued;

in this embodiment, "AllowedMeasBandwidth" indicates that the bandwidth 3MHz is less than 5MHz, so that the recombination object "AllowedMeasBandwidth" indicates that the bandwidth 3MHz system bandwidth is a duplicate;

the recombination mode in the step is the same as that in the step B;

in this embodiment, the bandwidth is measured using 1.4MHz, "AllowedMeasBandwidth" to indicate a 3MHz copy of the bandwidth;

in this embodiment, the relative signal quality indicator uses RSRQ;

In this embodiment, the actual network does not trigger NW _ CRS _ IM, so the estimation result of relative signal quality indicator SNR dominance (i.e., SNR estimation value is highest) comes from the 3MHz system bandwidth replica;

and D, processing the downlink enhanced receiver.

The method further comprises the following steps:

in this embodiment, the terminal supports the CCIM downlink enhanced receiver, and thus continues to execute;

step D2., receiving service cell downlink service subframes, before triggering CCIM, respectively implementing CRS recombination on each effective same-frequency adjacent cell and obtaining a copy, wherein the recombination object at least comprises a copy of the same bandwidth as the system bandwidth of the service cell;

in this embodiment, the system bandwidth 3MHz of the serving cell is less than 5MHz, so the restructured object only includes the copy of the system bandwidth 3MHz of the serving cell;

the recombination mode in the step is the same as that in the step B;

in the embodiment, the 3MHz bandwidth copy with the same measurement bandwidth of 1.4MHz and the system bandwidth of the service cell is used for estimating the relative signal quality index of the adjacent cell;

in this embodiment, the relative signal quality indicator uses RSRQ;

In this embodiment, the actual network does not trigger NW _ CRS _ IM, so the estimation result of relative signal quality indicator RSRQ dominance (i.e., RSRQ estimation value is highest) comes from the 3MHz system bandwidth replica;

step D5. implements downlink CCIM enhanced reception based on the actual operating bandwidth of the active co-frequency neighbor.

The fourth implementation scenario of the preferred embodiment is that the Cat-M1 terminal is in an idle state in the 3GPP Rel-15 network.

Step a, the terminal determines whether the current cell may support NW _ CRS _ IM? If yes, the execution is continued; otherwise, the current network does not support NW _ CRS _ IM, and the technical scheme of the invention does not need to be triggered.

In this embodiment, the camping cell has a system bandwidth of 20MHz, supports 3GPP Rel-15, and the camping cell system message does not carry an explicit NW _ CRS _ IM function extension, and the terminal cannot absolutely confirm whether the current camping cell may support NW _ CRS _ IM, so that the terminal defaults to execute the subsequent steps according to the current camping cell may support NW _ CRS _ IM;

step B, serving cell time/frequency synchronization control flow;

b, the current terminal is of Cat-M1 grade, and the time/frequency synchronization control flow of the service cell in the step B is processed according to a conventional mode;

step C, measuring adjacent regions;

c, the current terminal is of Cat-M1 grade, and the neighbor cell measurement flow in the step C is processed in a conventional mode;

step D downlink enhanced receiver processing flow

The method further comprises the following steps:

in the embodiment, the terminal supports the CRS-IM downlink enhanced receiver, so that the implementation is continued;

in this embodiment, the system bandwidth 20MHz of the serving cell is greater than 5MHz, so the restructured object only includes the system bandwidth copy of the serving cell 20MHz and the system bandwidth copy of 5 MHz;

the recombination mode in the step B is the fourth recombination mode, namely the original CRS information is directly used;

in the embodiment, the terminal is of a Cat-M1 grade, and the 20MHz bandwidth copy is implemented by only using the bandwidth copy with the same system bandwidth of the service cell to implement the estimation of the relative signal quality index of the adjacent cell;

in this embodiment, the relative signal quality indicator uses SINR;

Specifically, when the terminal is of Cat-M1 or Cat-M2 class, it is determined whether a relative signal quality indicator obtained using a copy of a bandwidth having the same system bandwidth of a serving cell exceeds the indicator th of the serving cell? If yes, the actual working bandwidth of the effective adjacent cell with the same frequency is the same as that of the service cell; if not, the adjacent region with the same frequency is invalid and jumps out;

in the embodiment, the terminal is of a Cat-M1 grade, the relative signal quality index obtained by using a bandwidth copy with the same system bandwidth of the service cell exceeds the index of the service cell by 5dB, and the actual working bandwidth of an effective same-frequency adjacent cell is the same as that of the service cell;

step D5. implements downlink CCIM enhanced reception based on the actual working bandwidth of the effective co-frequency adjacent cell

The fifth implementation scenario of the preferred embodiment is that the Cat-M2 terminal is in a connected state in the 3GPP Rel-13 network.

Step a, the terminal determines whether the current cell may support NW _ CRS _ IM? If yes, the execution is continued; otherwise, the current network does not support NW _ CRS _ IM, and the technical scheme of the invention is not required to be triggered to jump out (protection, emphasis)

In this embodiment, the camping cell only supports the 3GPP Rel-13 version, that is, the current network does not support NW _ CRS _ IM, and the technical scheme of the present invention does not need to be triggered. (ii) a

The sixth implementation scenario of the preferred embodiment is that the Cat-M1 terminal is in an idle state in the 3GPP Rel-15 network.

In step B, the terminal determines whether the current cell may support NW _ CRS _ IM? If yes, the execution is continued; otherwise, the current network does not support NW _ CRS _ IM, and the technical scheme of the invention is not required to be triggered to jump out (protection, emphasis)

In this embodiment, the system bandwidth of the residential cell is only 1.4MHz, i.e., the current network does not support NW _ CRS _ IM, and the technical scheme of the present invention does not need to be triggered;

the invention has the beneficial effects that:

1, when implementing the scenes of adjacent cell measurement, service cell time/frequency synchronization, downlink service reception and the like, a network and a terminal do not need to introduce a complex NW _ CRS _ IM activation information signaling interaction flow.

And 2, implementing self-adaptive CRS-based measurement and synchronous operation on the terminal side to realize the optimal downlink receiving performance and ensure the robustness of the downlink receiving performance.

3 the invention is especially suitable for the condition that the network opens NW _ CRS _ IM high service load. Generally, the higher the service load is, the more complicated the NW _ CRS _ IM activation condition is, and compared with the existing method, the more the capability of ensuring the robustness of the downlink receiving performance can be embodied.

It will be clear and understood by those of ordinary skill in the art that the above examples of the method of the present invention are illustrative only and not intended to be limiting. While the invention has been described effectively by way of examples, those skilled in the art will appreciate that there are numerous variations of the invention that do not depart from the spirit of the invention. Various corresponding changes or modifications can be made by those skilled in the art without departing from the spirit and substance of the method of the present invention, and these corresponding changes or modifications are within the scope of the claims of the method of the present invention.

Claims

1. A terminal receiving method is characterized by comprising the following steps,

judging whether the cell supports NW _ CRS _ IM;

the cell time and frequency synchronization control step comprises the following steps: recombining the cell reference signals and acquiring cell reference signal copies; if the system bandwidth of the cell is less than or equal to the system bandwidth of 5MHz, adopting the system bandwidth of 1.4MHz and the system bandwidth copy of the cell to carry out estimation of the relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and obtain estimation result information, and if the system bandwidth of the cell is more than the system bandwidth of 5MHz, respectively adopting the system bandwidth of 1.4MHz and the system bandwidth copy of the cell and/or the system bandwidth copy of 5MHz to carry out estimation of the relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and obtain estimation result information; selecting time synchronization estimation result information and frequency synchronization estimation result information with dominant signal quality indexes for receiver time and frequency synchronization control;

measuring adjacent cells;

and (3) processing the downlink enhanced receiver.

2. The terminal receiving method of claim 1, wherein said determining whether the cell supports NW _ CRS _ IM comprises,

or,

3. A terminal receiving method according to claim 1 or 2, wherein said determining whether a cell supports NW _ CRS _ IM comprises,

4. A terminal receiving method according to claim 1, wherein said cell time and frequency synchronization control step comprises,

5. The terminal receiving method of claim 1, wherein said reassembling cell reference signals and obtaining cell reference signal copies comprises,

6. A terminal reception method according to claim 1, wherein reassembling the cell reference signals and obtaining cell reference signal copies comprises,

7. The terminal receiving method of claim 1, wherein said reassembling cell reference signals and obtaining cell reference signal copies comprises,

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Reference signal recombination is performed.

8. The terminal receiving method of claim 1, wherein said reassembling cell reference signals and obtaining cell reference signal copies comprises,

P corresponds to the antenna port number; at the same time will

CRSRE nearest to and not in the center 6RB range is noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Reference signal recombination is performed.

9. The terminal receiving method of claim 1, wherein said reassembling cell reference signals and obtaining cell reference signal copies comprises,

10. The terminal receiving method of claim 1, wherein said neighbor cell measuring step comprises,

11. The terminal receiving method of claim 1, wherein said neighbor cell measuring step comprises,

12. The terminal receiving method of claim 11, wherein said performing CRS re-assembly on neighboring cells and obtaining a replica, the re-assembly object at least containing the replica of the AllowedMeasBandwidth indication bandwidth comprises,

if the AllowedMeasBandwidth indicates a bandwidth greater than 5MHz, the reassembled object also contains a 5MHz copy of the system bandwidth.

13. A terminal reception method according to claim 1, characterized in that said downlink enhanced receiver processing step comprises,

14. The terminal receiving method of claim 13, wherein said downlink enhanced receiver processing step comprises,

15. The terminal receiving method of claim 13, wherein said downlink enhanced receiver processing step comprises,

16. The terminal receiving method of claim 13, wherein said downlink enhanced receiver processing step comprises,

17. A terminal receiving method is characterized by comprising the following steps,

judging whether the cell supports NW _ CRS _ IM;

a cell time and frequency synchronization control step;

a neighbor cell measurement step, comprising: obtaining the AllowedMeasBandwidth configuration of the adjacent region, judging whether the AllowedMeasBandwidth is larger than mbw6, if so, continuing to execute the adjacent region measurement step, otherwise, limiting the adjacent region measurement bandwidth to the center 6RB and executing the adjacent region measurement step in a conventional mode; performing CRS recombination on the adjacent region and obtaining a copy, wherein the recombination object at least comprises the copy of the AllowedMeasBandwidth indication bandwidth; respectively adopting a 1.4MHz measurement bandwidth and an AllowedMeasBandwidth indication bandwidth copy and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and obtain measurement index information; selecting measurement index information with dominant signal quality indexes for actual neighbor measurement;

and (3) processing the downlink enhanced receiver.

18. The terminal receiving method of claim 17, wherein said determining whether the cell supports NW _ CRS _ IM comprises,

or,

19. The terminal receiving method of claim 17 or 18, wherein said determining whether a cell supports NW _ CRS _ IM comprises,

20. The terminal receiving method of claim 17, wherein said cell time and frequency synchronization controlling step comprises,

21. The terminal receiving method according to claim 17, wherein said neighbor cell measuring step comprises,

22. The terminal receiving method of claim 17, wherein the performing CRS re-assembly on the neighboring cells and obtaining the replica, the re-assembly object at least containing the replica of the AllowedMeasBandwidth indication bandwidth comprises,

23. The terminal receiving method of claim 17, wherein said downlink enhanced receiver processing step comprises,

24. The terminal receiving method of claim 23, wherein said downlink enhanced receiver processing step comprises,

25. The terminal receiving method of claim 23, wherein said downlink enhanced receiver processing step comprises,

26. The terminal receiving method of claim 23, wherein said downlink enhanced receiver processing step comprises,

27. A terminal receiving method is characterized by comprising the following steps,

judging whether the cell supports NW _ CRS _ IM;

a cell time and frequency synchronization control step;

measuring adjacent cells;

the downlink enhanced receiver processing step comprises: judging whether the terminal supports a downlink enhanced receiver, if so, continuing to execute the processing step of the downlink enhanced receiver, and if not, ending the processing step of the downlink enhanced receiver; receiving a cell downlink service subframe, respectively carrying out CRS recombination on each effective same-frequency adjacent cell and obtaining a copy before triggering CRS-IM and/or CCIM, wherein the recombination object at least comprises a copy of the same bandwidth as the system bandwidth of the cell; respectively adopting a bandwidth copy with the same 1.4MHz measurement bandwidth and cell system bandwidth and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and obtain adjacent cell relative signal quality index estimation information; and selecting a bandwidth copy with the dominant neighbor cell relative signal quality index estimation information as an actual working bandwidth of the effective same-frequency neighbor cell, and implementing downlink CRS-IM and/or CCIM enhanced reception by adopting the actual working bandwidth of the effective same-frequency neighbor cell.

28. The terminal receiving method of claim 27, wherein said determining whether the cell supports NW _ CRS _ IM comprises,

or,

29. The terminal receiving method of claim 27 or 28, wherein said determining whether a cell supports NW _ CRS _ IM comprises,

30. The terminal receiving method of claim 27, wherein said cell time and frequency synchronization controlling step comprises,

31. The terminal receiving method of claim 27, wherein said neighbor cell measuring step comprises,

32. The terminal receiving method of claim 27, wherein said downlink enhanced receiver processing step comprises,

33. The terminal receiving method of claim 27, wherein said downlink enhanced receiver processing step comprises,

34. The terminal receiving method of claim 27, wherein said downlink enhanced receiver processing step comprises,

if the terminal is of Cat-Mi or Cat-M2 grade, judging whether the relative signal quality index obtained by adopting the bandwidth copy with the same system bandwidth of the cell exceeds the index th of the cell, if so, the actual working bandwidth of the effective adjacent cell with the same frequency is the same as the cell, otherwise, ending the processing step of the downlink enhanced receiver;

35. A terminal receiving device is characterized by comprising the following modules,

a judging module, configured to judge whether a cell supports NW _ CRS _ IM;

the synchronization module is used for controlling cell time and frequency synchronization and comprises: recombining the cell reference signals and acquiring cell reference signal copies; if the system bandwidth of the cell is less than or equal to the system bandwidth of 5MHz, adopting the system bandwidth of 1.4MHz and the system bandwidth copy of the cell to carry out estimation of the relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and obtain estimation result information, and if the system bandwidth of the cell is more than the system bandwidth of 5MHz, respectively adopting the system bandwidth of 1.4MHz and the system bandwidth copy of the cell and/or the system bandwidth copy of 5MHz to carry out estimation of the relative signal quality index of the cell, time synchronization estimation and frequency synchronization estimation and obtain estimation result information; selecting time synchronization estimation result information and frequency synchronization estimation result information with dominant signal quality indexes for receiver time and frequency synchronization control;

the measuring module is used for measuring the adjacent area;

36. A terminal receiving arrangement according to claim 35,

the judging module judges whether the cell supports NW _ CRS _ IM according to the 3GPP version of the cell;

or,

37. A terminal receiving arrangement according to claim 35 or 36,

the judging module sets the cell to support NW _ CRS _ IM if the judging module can not judge whether the cell supports NW _ CRS _ IM.

38. The terminal receiving device of claim 35, wherein the synchronization module determines whether the current CAT capability level of the terminal is CAT-M1, and if so, the cell time and frequency synchronization control step is performed in a conventional manner.

39. The terminal receiving apparatus of claim 35, wherein the synchronization module for reassembling the cell reference signal and obtaining the cell reference signal replica comprises,

40. The terminal receiving apparatus of claim 35, wherein the synchronization module for reassembling the cell reference signal and obtaining the cell reference signal replica comprises,

41. The terminal receiving apparatus of claim 35, wherein the synchronization module for reassembling the cell reference signal and obtaining the cell reference signal replica comprises,

using CRS antenna port as unit, belonging to the middle symbol by symbolThe CRS of the heart 6RB is numbered according to the ascending order of the frequency domain subcarriers to form a reference signal array

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Performing reference signal recombination;

according to

Reference signal recombination is performed.

42. The terminal receiving apparatus of claim 35, wherein the synchronization module for reassembling the cell reference signal and obtaining the cell reference signal replica comprises,

P corresponds to the antenna port number; at the same time will

CRS REs nearest to and not in the center 6RB range are noted

Will be provided with

CRS REs nearest to and not in the center 6RB range are noted

According to

Reference signal recombination is performed.

43. The terminal receiving apparatus of claim 35, wherein the synchronization module for reassembling the cell reference signal and obtaining the cell reference signal replica comprises,

44. The apparatus as claimed in claim 35, wherein the measuring module determines whether the terminal is Cat-M1 class, and if so, the neighbor cell measuring step is performed in a conventional manner.

45. The terminal receiving device of claim 35, wherein the measuring module obtains the neighbor cell AllowedMeasBandwidth configuration, determines whether AllowedMeasBandwidth is greater than mbw6, if yes, continues the neighbor cell measuring step, otherwise, the neighbor cell measures bandwidth only for the center 6RB and performs the neighbor cell measuring step in a conventional manner;

46. The terminal receiving device of claim 45, wherein the measurement module performs CRS reassembly for neighboring cells and obtains the replica, and the reassembly object comprises at least a replica of the AllowedMeasBandwidth indication bandwidth including if the AllowedMeasBandwidth indication bandwidth is greater than 5MHz, the reassembly object further comprises a replica of the 5MHz system bandwidth.

47. A terminal receiving arrangement according to claim 35,

the receiver processing module judges whether the terminal supports a downlink enhanced receiver, if so, the downlink enhanced receiver processing step is continuously executed, and if not, the downlink enhanced receiver processing step is ended;

48. A terminal receiving arrangement according to claim 47,

if the system bandwidth of the cell is larger than 5MHz, the re-assembly object of the receiver processing module also comprises a copy of the system bandwidth of 5 MHz.

49. A terminal receiving arrangement according to claim 47,

50. A terminal receiving arrangement according to claim 47,

if the terminal is of Cat-M1 or Cat-M2 grade, the receiver processing module judges whether the relative signal quality index obtained by adopting a bandwidth copy with the same system bandwidth of the cell exceeds the index th of the cell, if so, the actual working bandwidth of the effective same-frequency adjacent cell is the same as the cell, and if not, the downlink enhanced receiver processing step is finished;

51. A terminal receiving apparatus, comprising the following modules:

a judging module, configured to judge whether a cell supports NW _ CRS _ IM;

the measuring module is used for measuring the adjacent regions and comprises: obtaining the AllowedMeasBandwidth configuration of the adjacent region, judging whether the AllowedMeasBandwidth is larger than mbw6, if so, continuing to execute the adjacent region measurement step, otherwise, limiting the adjacent region measurement bandwidth to the center 6RB and executing the adjacent region measurement step in a conventional mode; performing CRS recombination on the adjacent region and obtaining a copy, wherein the recombination object at least comprises the copy of the AllowedMeasBandwidth indication bandwidth; respectively adopting a 1.4MHz measurement bandwidth and an AllowedMeasBandwidth indication bandwidth copy and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and obtain measurement index information; selecting measurement index information with dominant signal quality indexes for actual neighbor measurement;

and the receiver processing module is used for the downlink enhanced receiver processing step.

52. A terminal receiving apparatus, comprising the following modules:

a judging module, configured to judge whether a cell supports NW _ CRS _ IM;

the measuring module is used for measuring the adjacent area;

a receiver processing module for downlink enhanced receiver processing, comprising: judging whether the terminal supports a downlink enhanced receiver, if so, continuing to execute the processing step of the downlink enhanced receiver, and if not, ending the processing step of the downlink enhanced receiver; receiving a cell downlink service subframe, respectively carrying out CRS recombination on each effective same-frequency adjacent cell and obtaining a copy before triggering CRS-IM and/or CCIM, wherein the recombination object at least comprises a copy of the same bandwidth as the system bandwidth of the cell; respectively adopting a bandwidth copy with the same 1.4MHz measurement bandwidth and cell system bandwidth and/or a 5MHz system bandwidth copy to carry out adjacent cell relative signal quality index estimation and obtain adjacent cell relative signal quality index estimation information; and selecting a bandwidth copy with the dominant neighbor cell relative signal quality index estimation information as an actual working bandwidth of the effective same-frequency neighbor cell, and implementing downlink CRS-IM and/or CCIM enhanced reception by adopting the actual working bandwidth of the effective same-frequency neighbor cell.