WO2013026414A1

WO2013026414A1 - Communication system access method, downlink information transmission method, terminal and base station

Info

Publication number: WO2013026414A1
Application number: PCT/CN2012/080592
Authority: WO
Inventors: 李龠; 甄斌; 朱松
Original assignee: 华为技术有限公司
Priority date: 2011-08-25
Filing date: 2012-08-25
Publication date: 2013-02-28
Also published as: CN102958133A; CN102958133B

Abstract

Disclosed in an embodiment of the present application are a narrow band terminal and method for the narrow band terminal to access a communication system, the method comprising: the narrow band terminal receives an extended physical broadcast channel (PBCH) transmitted by a base station; the narrow band terminal reads the dedicated allocation information carried on the extended PBCH; the narrow band terminal allocates downlink resources and uplink resources according to the dedicated allocation information, and accesses the communication system upon completion of the allocation. Instead of allocating a dedicated frequency band for the narrow band terminal in an existing frequency band, the embodiment of the present application allocates an extended PBCH matching the bandwidth reception capability of the narrow band terminal, and allocates the uplink and downlink resources of the narrow band terminal on the basis of the extended PBCH, so that the narrow band terminal can fully utilize the existing frequency band resources to access the communication system.

Description

Method for accessing communication system, method for transmitting downlink information, terminal, and application of the present invention is submitted to the Chinese Patent Office on August 25, 2011, and the application number is 201110246549.5, and the invention is entitled "Access Communication System Method, Downlink Information Transmission" The priority of the Chinese Patent Application for the Method, the Terminal and the Base Station, the entire contents of which are hereby incorporated by reference. TECHNICAL FIELD The present application relates to the field of communications technologies, and in particular, to a method for a narrowband terminal access communication system, a downlink information transmission method, a narrowband terminal, and a base station.

Background technique

M2M (Machine to Machine) technology is a network that connects items to the Internet through information sensing devices for intelligent identification and management. In the increasingly developed M2M technology, in order to reduce the terminal cost, a small-bandwidth low-end terminal (Low end UE) is required to implement communication, for example, a terminal supporting 1.4M radio frequency bandwidth, which is also called because the supported bandwidth is small. Narrowband terminal. In order to support M2M communication in the GSM (Global System of Mobile communication) band, it is necessary to make the narrowband terminal compatible with the existing communication terminal in the GSM band.

If a 1.4M dedicated frequency band is allocated in the existing GSM frequency band, although narrowband terminal communication in the GSM frequency band can be realized, for most narrowband terminals that are periodically reported, the above-mentioned dedicated frequency band is mostly used. It is difficult to use under time, and some frequency band resources are wasted.

SUMMARY Embodiments of the present application provide a method for narrowband terminal access communication system and a narrowband terminal. To solve the problem of wasting band resources.

In order to solve the above technical problem, the embodiment of the present application discloses the following technical solutions:

A method for a narrowband terminal to access a communication system, comprising:

The narrowband terminal receives the extended physical broadcast channel PBCH sent by the base station;

Reading special configuration information carried on the extended PBCH;

The narrowband terminal performs downlink resource and uplink resource configuration according to the dedicated configuration information, and accesses the communication system after the configuration is completed.

A method for transmitting downlink information includes:

The base station configures an extended physical broadcast channel PBCH for the narrowband terminal, and the extended PBCH carries dedicated configuration information;

The base station sends the extended PBCH to the narrowband terminal, so that the narrowband terminal performs downlink resource and uplink resource configuration according to the dedicated configuration information, and then accesses the communication system.

A narrowband terminal, comprising:

a transceiver unit, configured to receive an extended physical broadcast channel PBCH sent by the base station;

a reading unit, configured to read the dedicated configuration information carried on the extended PBCH, and a configuration unit, configured to perform downlink resource and uplink resource configuration according to the dedicated configuration information read by the reading unit;

And a processing unit, configured to access the communication system after the configuration unit is configured.

A base station comprising:

a configuration unit, configured to configure an extended physical broadcast channel PBCH for the narrowband terminal, and extend dedicated configuration information on the PBCH;

And a transceiver unit, configured to send the extended PBCH configured by the configuration unit to the narrowband terminal, so that the narrowband terminal performs downlink resource and uplink resource configuration according to the dedicated configuration information, and then accesses the communication system.

As can be seen from the foregoing embodiment, in the embodiment of the present application, the narrowband terminal receives the extended PBCH sent by the base station, and reads the dedicated configuration information carried on the extended PBCH, and the narrowband terminal is configured according to the special configuration. Set the information to configure downlink resources and uplink resources, and access the communication system after the configuration is complete. The embodiment of the present application does not need to allocate a dedicated frequency band for the narrowband terminal in the existing frequency band, but configures the extended PBCH that meets the bandwidth receiving capability of the narrowband terminal, and completes the uplink and downlink resource configuration of the narrowband terminal on the basis of the extended PBCH. The narrowband terminal is enabled to fully utilize existing frequency band resources to access the communication system.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that it is common in the art. For the technicians, other drawings can be obtained according to these drawings without giving any creative labor.

1 is a schematic diagram of a meshing structure of a time domain and a frequency domain of a physical resource block;

2 is a flowchart of a first embodiment of a method for accessing a communication system of a narrowband terminal according to the present application; FIG. 3A is a flowchart of a second embodiment of a method for accessing a communication system of a narrowband terminal according to the present application; 2C is a schematic diagram of a downlink resource configuration of a narrowband UE in a second embodiment; FIG. 3C is a schematic diagram of an uplink resource configuration of a narrowband UE in a second embodiment of the present application; 3E is a schematic diagram of an uplink resource configuration of a narrowband UE in a fifth embodiment of the present application; FIG. 3F is a schematic diagram of a downlink resource configuration of a narrowband UE in a sixth embodiment of the present application; Flow chart

Figure 5 is a block diagram of a first embodiment of a narrowband terminal of the present application;

6 is a block diagram of a second embodiment of a narrowband terminal of the present application;

7 is a block diagram of an embodiment of a base station of the present application.

DETAILED DESCRIPTION OF THE INVENTION The following embodiments of the present invention provide a method for a narrowband terminal access communication system, a downlink information transmission method, a narrowband terminal, and a base station. In the LTE (Long Term Evolution) system of 3GPP, one subframe (frame) contains 14 symbols in the time domain, each subframe contains two slots, and contains 12 bits in the frequency domain. Symbols. As shown in Figure 1, the PRB (Physical Resource Block) is the smallest unit of resource scheduling in a time slot. One PRB contains 12 subcarriers in the frequency domain and half of the subframes in the time domain. Long, that is, contains 7 symbols. Each PRE (Physical Resource Element) is a physical resource unit.

In the prior art, a common UE (User Equipment) can support LTE full-band transmission. When a normal UE is powered on, it first listens to SS (Synchronisation Signal) from 6 central PRBs of the entire frequency band, and then at the center 6 The PBCH (Physical Downlink Control Channel) is read on the PRB, and the configuration information such as the bandwidth and the PHICH (Physical Hybrid ARQ Indicator Channel) is obtained from the PBCH, and the PDCCH (Physical Downlink Control) is monitored according to the configuration information. Channel, physical downlink control channel), and receives system broadcasts and data according to the scheduling of the PDCCH. In the downlink direction, channels such as PDCCH and PHICH transmitted by the base station are all transmitted on the entire frequency band, and the system broadcast is also based on dynamic scheduling, that is, it may occupy any frequency band at any position of the resource block for transmission; in the uplink direction, the UE usually A PUCCH (Physical Uplink Control Channel) is transmitted at the upper and lower boundaries of the full band, and data is transmitted on the entire frequency band.

According to the above description, for a narrowband UE, since the supported bandwidth is relatively small, for example, generally 1.4M, and the LTE system bandwidth is usually 10M or 20M, it is difficult for the narrowband UE to communicate with the base station under the above system bandwidth. Access to existing communication systems. In the embodiment of the present application, the narrowband terminal can be broadly defined as a terminal whose supported bandwidth is smaller than the bandwidth supported by the existing communication system. In order to enable the narrowband UE to be in the same frequency band as the normal UE, the narrowband UE can access the base station of the broadband LTE system. In this embodiment, the narrowband UE reconfigures resources on the entire frequency band. The above described objects, features, and advantages of the embodiments of the present invention will become more apparent and understood. Give further details.

A first embodiment of a method for a narrowband terminal access communication system of the present application:

Referring to FIG. 2, a flow of a first embodiment of a method for accessing a communication system of a narrowband terminal according to the present application Figure:

Step 201: The narrowband terminal receives the extended PBCH sent by the base station.

The narrowband terminal may also read the received existing PBCH before receiving the extended PBCH sent by the base station. When the existing PBCH carries the identifier information indicating that the current communication system supports the narrowband terminal, the narrowband terminal performs the receiving extended PBCH. . The extended PBCH and the existing PBCH may be located in the same subframe.

The configuration of the extended PBCH may include: the extended PBCH is configured on the OFDM (Orthogonal Frequency Division Multiple) symbol after the existing PBCH, where the existing PBCH is configured on the OFDM symbol of the central frequency band. The extended PBCH is configured on the OFDM symbol of the central frequency band; or, the extended PBCH is configured to be offset from the preset frequency band of the central frequency band, and the preset frequency offset is carried by the existing PBCH or is solidified in the narrowband terminal; or The extended PBCH is configured on the existing PBCH vacant bit; or the extended PBCH is configured on the existing PBCH vacant bit, and when the vacant bit is insufficient, the remaining part of the extended PBCH is configured after the existing PBCH. On the symbol.

Step 202: Read the dedicated configuration information carried on the extended PBCH.

The reading the dedicated configuration information carried on the extended PBCH may include: reading the extended PHICH information carried on the extended PBCH and the downlink dedicated frequency band indication information of the narrowband terminal; or reading only the extended PHICH information carried on the extended PBCH, The downlink dedicated frequency band is pre-configured on the central frequency band without extending the PBCH bearer. In addition, the PCFICH (Physical Control Format Indicator Channel) information is fixedly configured without instructions.

Step 203: The narrowband terminal performs downlink resource and uplink resource configuration according to the dedicated configuration information, and accesses the communication system after the configuration is completed.

Specifically, the narrowband terminal performs the downlink resource configuration according to the dedicated configuration information, where the narrowband terminal monitors the extended PDCCH of the narrowband terminal in the downlink dedicated frequency band, and receives the downlink carried on the extended PDSCH according to the downlink scheduling information carried on the monitored enhanced PDCCH. data. The extended PDCCH is configured on the OFDM symbols after the existing PDCCH of each subframe in the downlink dedicated frequency band; the extended PDSCH is configured on the OFDM symbol except the extended control channel domain on the downlink dedicated frequency band, or the extended PDSCH is configured by An arbitrary position where the PDCCH is dynamically scheduled, and the extended control channel domain includes the enhanced PDCCH, the extended PHICH, and the extended PCFICH. Further, for the SIB (System Information Block), the narrowband terminal may receive the dedicated SIB carried on the extended PDSCH according to the scheduling information scheduled for the dedicated SIB carried on the monitored enhanced PDCCH; or, the extended control channel domain The dedicated time-frequency resource is divided by the base station, and the dedicated time-frequency resource is used to carry the dedicated SIB. The dedicated SIB is not scheduled to be sent on the time-frequency resource, and the dedicated SIB is the SIB constructed by the base station for the narrow-band terminal.

Specifically, the dedicated SIB carries uplink dedicated frequency band indication information of the narrowband terminal, or extends the uplink dedicated frequency band indication information of the narrowband terminal on the PBCH. The narrowband terminal performs uplink resource configuration according to the dedicated configuration information, including: the narrowband terminal transmits an extended PUCCH (Physical Uplink Control Channel) of the narrowband terminal on the uplink dedicated frequency band, and listens to the enhanced PDCCH of the narrowband terminal on the downlink dedicated frequency band. And transmitting the uplink data on the extended PUSCH (Physical Uplink Shared Channel) according to the uplink scheduling information carried on the enhanced PDCCH. The upper boundary of the frequency band and the lower boundary of the frequency band of the uplink dedicated frequency band are configured as the extended physical uplink control channel PUCCH of the narrowband terminal, and the remaining frequency band of the uplink dedicated frequency band except the upper boundary of the frequency band and the lower boundary of the frequency band is configured as an extended PUSCH of the narrowband terminal.

Further, when the uplink random access is performed, the narrowband terminal may send a preamble preamble code allocated for the narrowband terminal in the existing PRACH (Physical Random Access Channel) to perform random access, so that the base station recognizes After the preamble code is allocated to the narrowband terminal, the narrowband terminal access communication system is implemented by using an extended PDCCH scheduling RAR (Random Access Response); or, the uplink dedicated frequency band indicates extension of the narrowband terminal on the dedicated band of the information line. The preamble code is sent on the PRACH, and the random access is performed by extending the PRACH, so that the base station schedules the RAR through the enhanced PDCCH, so that the narrowband terminal accesses the communication system.

Further, after the narrowband terminal accesses the communication system, the narrowband terminal transmits an uplink SRS (Sounding Reference Signaling) in addition to the other OFDM symbols of the last OFDM symbol in each subframe of the uplink dedicated frequency band.

It can be seen from the foregoing embodiment that the present application does not need to allocate a dedicated frequency band for a narrowband terminal in an existing frequency band, but configures an extended PBCH that meets its bandwidth receiving capability for a narrowband terminal, and completes uplink and downlink resources of the narrowband terminal on the basis of extending the PBCH. Configuration, making narrowband terminals fully profitable Access to the communication system using existing band resources. A second embodiment of the method for accessing a communication system of a narrowband terminal of the present application:

3A is a flowchart of a second embodiment of a method for accessing a communication system of a narrowband terminal according to the present application. The embodiment shows a process of accessing a communication system with a narrowband terminal according to FIG. 3B and FIG. 3C. FIG. For example, a schematic diagram of a downlink resource configuration of a narrowband UE in the example, and FIG. 3C is a schematic diagram of an uplink resource configuration of a narrowband UE in the embodiment:

Step 301: The narrowband UE receives the SS sent by the base station.

In the LTE system, regardless of the system bandwidth of 5M, 10M or 20M, the six central PRBs of the time-frequency resources are less than 1.4M, which meets the receiving requirements of the narrowband UE. In the prior art, the base station side transmits the SS on the six central PRBs, and sends the existing PBCH after transmitting the SS, as shown in FIG. 3B, where the SS is repeatedly transmitted in a period of 5 ms, and the existing PBCH is in a period of 10 ms. Repeatedly sent. After the narrowband UE is powered on, it can receive the SS under its own bandwidth support capability.

Further, since the existing PBCH is also transmitted on the six central PRBs of the time-frequency resource block, the narrow-band UE can also receive the existing PBCH and read the information carried by the narrow-band UE. Therefore, the vacant bit of the existing PBCH can be used to identify whether the current cell supports the narrowband UE. Correspondingly, when the narrowband UE reads information indicating that the current cell does not support the narrowband UE, other cell access can be selected, and if When the information identifying the current cell supporting the narrowband UE is used, the process of subsequently accessing the current cell may be performed.

Step 302: The narrowband UE receives the extended PBCH sent by the base station, and the extended PBCH is located in the same subframe as the existing PBCH.

In FIG. 3B, the existing PBCH is used to carry the configuration information such as the PHICH required by the existing terminal supporting the full-band bandwidth, and the configuration information is difficult to be used by the narrowband UE. In order to implement the narrowband UE access to the broadband system, the embodiment of the present application is present. After the PBCH is introduced, an extended PBCH is introduced, through which the configuration information used by the narrowband UE is carried.

The extended PBCH and the existing PBCH are located in the same subframe, and the extended PBCH may exist on several time-frequency resources after the existing PBCH, which is the same as the bandwidth of the existing PBCH, as shown in FIG. 3B, the existing SS signal The existing PBCH and the extended PBCH occupy six central PRBs in the frequency domain. In the time domain, the existing SS signals occupy two time domain symbols, and the existing PBCH occupies four time domain symbols after the existing SS signals. The extended PBCH occupies three time domain symbols after the existing PBCH; in addition to the extended PBCH allocation mode shown in FIG. 3B, due to the existing PBCH There are a number of vacant bits on the time-frequency resource occupied by itself, so these vacant bits can also be allocated to the extended PBCH; or when the vacant bits are insufficient to transmit the extended PBCH, the time-frequency resources after the existing PBCH can be transmitted. And allocate a resource for transmitting an insufficient portion of the extended PBCH to the extended PBCH.

The foregoing shows that regardless of whether the extended PBCH is configured separately or the spare bit of the existing PBCH is occupied, the extended PBCH has the same bandwidth as the existing PBCH, that is, both are located in the center six frequency bands of the time-frequency resource. In other embodiments, the extended PBCH may not be configured on the central frequency band. For example, the allocated position of the extended PBCH may be indicated by a spare bit of the existing PBCH, or one extended PBCH may be preset with respect to the central frequency band. Frequency offset, the narrowband UE can obtain an extended PBCH according to the frequency offset.

Step 303: Read downlink dedicated frequency band indication information carried on the extended PBCH.

In this embodiment, the extended PBCH carries a downlink dedicated frequency band dynamically allocated for the narrowband UE. As shown in FIG. 3B, the arrow from the extended PBCH points to the time-frequency resource indicated by the gray portion in the next subframe. The time-frequency resource is the resource occupied by the extended control channel domain allocated for the narrowband UE.

In FIG. 3B, the first three time domain symbols in each subframe occupy the full frequency band to transmit the existing PDCCH, and the UE may receive the monitoring enhanced PDCCH, and the time-frequency resource occupied by the enhanced PDCCH is smaller than the bandwidth supported by the narrowband UE. can. Within the time-frequency resource range occupied by the extended PD C CH, there are also extended PCFICH and extended PHICH occupying a small amount of time-frequency resources accompanying transmission, extended PDCCH, extended PCFICH and extended PHICH to form an extended control channel domain. In the existing LTE system, the PCFICH and the PHICH are also interspersed in the time-frequency resources occupied by the PDCCH, and the resources occupied by these channels are collectively referred to as a control channel domain. In one subframe of the dedicated frequency band, except for the allocated existing control channel domain and the extended control channel domain, the remaining time-frequency resources may be allocated to the extended PDSCH, where the extended PDSCH is used to receive downlink data according to the scheduling information of the enhanced PDCCH bearer. . It should be noted that, in one subframe resource, the mutual position between the extended PDCCH and the extended PDSCH allocated for the narrowband UE, and the ratio of the occupied time domain symbol resources can be flexibly adjusted, as long as it can be used by the narrowband UE. The embodiments of the present application are not limited.

In addition, the extended PBCH may carry an indication of an uplink dedicated band resource allocated for the narrowband UE in addition to the configuration information and the indication information of the dedicated frequency band for monitoring the PDCCH. Step 304: Listen to the enhanced PDCCH of the narrowband terminal on the downlink dedicated frequency band.

In this embodiment, the PHICH of the narrowband UE and the channel such as the PCFICH may occupy the same time-frequency resource block as the enhanced PDCCH, that is, the PHICH and the PCFICH may be interspersed between the enhanced PDCCHs, and the time-frequency resource block may be referred to as a narrowband UE. Dedicated control channel domain. The extended PDCCH carries information for scheduling the PDSCH, so that the PDSCH receives the downlink data according to the scheduling information.

In addition, in the prior art, the existing PDCCH mask SI-RNTI (System Information Radio Network Temporary Identity) is used for scheduling, and the existing PDCCH occupies the full frequency band for transmission. The narrowband UE in the embodiment of the present application cannot receive. Therefore, in the embodiment of the present application, the dedicated SIB dedicated to the narrowband UE reception may be constructed by the base station side, and then scheduled by the extended PDCCH mask SI-RNTI, and the dedicated SIB is received by the extended PDSCH according to the scheduling information. Alternatively, the dedicated SIB dedicated to the narrowband UE reception is carried in the extended control channel domain for transmission. In this case, more time-frequency resources may be allocated to the extended extended control channel domain in advance for carrying the SIB for non-scheduled transmission. . Both of the above methods for transmitting the SIB need to reconstruct a dedicated SIB for the narrowband UE, and the existing UE receives the existing constructed SIB, so the base station side needs to construct two sets of SIBs.

Or, the base station side constructs a dedicated SIB in which the size of the PDSCH is limited to be supported by the bandwidth of the narrowband UE, for example, an SIB of less than 1.4 M. At this time, for the existing UE, the base station side passes the existing PDCCH mask. The scheduling of the SI-RNTI is performed. The bandwidth of the existing PDCCH is greater than the bandwidth that the narrowband UE can receive. Therefore, the narrowband UE does not receive the scheduling information sent by the existing PDCCH. Meanwhile, the base station side performs the enhanced PDCCH mask SI-RNTI. After the scheduling information of the enhanced PDCCH is received, the narrowband UE can obtain the dedicated SIB on the extended PDSCH. That is, the base station side only needs to construct a dedicated SIB, so that the existing UE and the narrowband UE can simultaneously receive the dedicated SIB.

As described in the foregoing step 303, the extended PBCH may carry an indication of the uplink dedicated band resource allocated for the narrowband UE; or the indication of the uplink dedicated band resource may also be carried in the SIB for transmission; or, the uplink dedicated band resource is also It may be fixedly set in advance by the base station side to a certain frequency band, for example, the uplink dedicated frequency band shown in FIG. 3C, wherein a certain bandwidth of the upper and lower boundaries of the uplink dedicated frequency band is allocated to the extended PUCCH of the narrowband UE, and the rest is extended as a narrowband UE. PUSCH.

Step 305: Receive an extension according to scheduling information carried on the enhanced PDCCH that is monitored. Data carried on the PDSCH.

For example, for the transmission of the foregoing dedicated SIB, the narrowband UE may receive the dedicated SIB carried on the extended PDSCH according to the scheduling information scheduled for the dedicated SIB carried on the monitored extended PDCCH.

Step 306: The narrowband UE performs random access by using a preamble code allocated for the narrowband terminal carried in the existing PRACH.

In this embodiment, the narrowband UE shares the existing PRACH resources with the normal UE, as shown in FIG. 3C. The PRACH is used to transmit the preamble code in the process of the terminal random access. In order to distinguish the existing UE from the narrowband UE, in this embodiment, the reamble code may be pre-grouped, and a part of the preamble code is used for random access of the existing UE, and another A part of the preamble code is used for random access of the narrowband UE, that is, the existing UE and the narrowband UE use different preamble codes for random access, so that the base station side can identify the narrowband UE, thereby preventing the base station side from scheduling through the existing PDCCH. The random access response RAR of the narrowband UE is sent, so that the narrowband UE cannot receive.

Step 307: After the base station identifies the preamble code allocated for the narrowband UE, the base station coordinates the RAR to implement the narrowband UE access communication system.

After receiving the preamble code of the PRACH bearer, the base station can identify that the narrowband UE needs to be accessed according to the preamble code, so the random access response RAR of the narrowband UE is scheduled using the enhanced PDCCH, so that the narrowband UE can receive the The random access responds to the RAR, thereby accessing the system.

In addition, it should be noted that, in the uplink random access procedure, the narrowband UE needs to send an uplink SRS. In the prior art, the SRS is usually sent on the last OFDM symbol of one subframe, and each UE transmits the SRS simultaneously or hopped on the entire frequency band, that is, in the embodiment of the present application, for the last frame of the narrowband UE. For one OFDM symbol, the existing UE also transmits the SRS on the last OFDM symbol, so the capacity between the narrowband UE and the existing UE will affect each other. In order to overcome the above-mentioned deficiencies, the following optimization modes may be used in this embodiment: The base station informs the existing UE that the SRS is not transmitted on the uplink dedicated frequency band of the narrowband UE; or the existing UE normally transmits the SRS on the uplink dedicated frequency band of the narrowband UE (occupied) The last OFDM symbol transmits SRS), and the narrowband UE does not occupy the last OFDM symbol of each subframe of the uplink dedicated frequency band when transmitting the SRS in its uplink dedicated frequency band.

It can be seen from the foregoing embodiment that the present application does not need to allocate a dedicated frequency band for a narrowband terminal in an existing frequency band, but configures an extended PBCH that conforms to its bandwidth receiving capability for a narrowband terminal, and is expanded. On the basis of the PBCH, the uplink and downlink resource configuration of the narrowband terminal is completed, so that the narrowband terminal can fully utilize the existing frequency band resources to access the communication system. Further, in the foregoing embodiment, the indication manners of the uplink dedicated frequency band and the downlink dedicated frequency band are specifically described, that is, The dynamic indication is performed by extending the PBCH, thereby improving the flexibility of uplink access of the narrowband terminal. A third embodiment of the method for accessing a communication system of a narrowband terminal of the present application:

The third embodiment is substantially the same as the execution flow of the foregoing second embodiment, except that the extended PBCH in this embodiment is only used to indicate the location of the extended control channel domain in the time-frequency resource block, and does not indicate that the extended PDSCH is in the The position in the time-frequency resource block, the position of the extended PDSCH in the time-frequency resource block can be dynamically scheduled by the enhanced PDCCH, that is, the extended PDSCH can be located at any position of the time-frequency resource block, as long as the frequency domain resource occupied by the extended frequency domain is not greater than The narrow bandwidth UE can accept the bandwidth range.

When the embodiment is applied, the enhanced PDCCH, and the PHICH, PCFICH, and the like, which are interspersed with the PDCCH on the same dedicated control channel domain, are not in the same frequency band as the extended PDSCH, and the narrowband UE is limited by the bandwidth, when the PDCCH, PHICH, When the PCFICH and the PDSCH are simultaneously transmitted, the bandwidth of the occupied frequency band may be greater than the bandwidth that the narrowband UE can receive. Therefore, the narrowband UE cannot receive data simultaneously in multiple frequency bands, so the data reception needs to be scheduled in the time domain: in the current subframe. If the narrowband UE is not scheduled to receive data, the enhanced PDCCH is continuously monitored in the frequency band in which the enhanced PDCCH is located. When the narrowband UE is scheduled to receive data, the data is received in the frequency band in which the extended PDSCH is located, and the base station side does not currently in the current subframe. The extended PDCCH is scheduled again. In addition, on the subframe that needs to receive the PHICH, the base station side does not schedule the narrowband UE to receive the data of the extended PDSCH, so as to ensure that the frequency band occupied by the narrowband UE when receiving data in the same subframe is larger than the bandwidth that the narrowband UE can support.

As can be seen from the foregoing embodiment, the extended PBCH in this embodiment is only used to indicate the location of the extended control channel domain in the time-frequency resource block, and the location of the extended PDSCH in the time-frequency resource block can be dynamically scheduled by the enhanced PDCCH, thereby improving Extend the configuration flexibility of the PDSCH. A fourth embodiment of the method for accessing a communication system of a narrowband terminal of the present application:

This embodiment is substantially the same as the execution flow of the foregoing second embodiment and the third embodiment, except that the narrowband UE shares the existing PRACH resources with the existing UE in the foregoing embodiment, and in this embodiment, the narrowband UE In the uplink dedicated resources, the extended PRACH can be divided and extended. PRACH is different from ordinary PRACH in occupying frequency domain resources, as shown in Figure 3D.

In this embodiment, the narrowband UE may be configured to extend the PRACH bearer preamble code in the uplink random access procedure. Since the extended PRACH is different from the frequency domain resources occupied by the existing PRACH, there is no need to divide the existing preamble code, that is, no need to The narrowband UE allocates a special preamble code, and the base station side can identify the terminal that needs to access the system as a narrowband UE according to the extended PRACH.

It can be seen that, in this embodiment, the extended PRACH is allocated for the narrowband UE, so that the narrowband terminal performs uplink random access. Therefore, it is not necessary to allocate a special preamble code for the narrowband UE, thereby avoiding reallocation of the existing preamble code resource. A fifth embodiment of the method for accessing a communication system of a narrowband terminal of the present application:

This embodiment is substantially the same as the foregoing implementation processes of the second embodiment, the third embodiment, and the fourth embodiment, except that the dedicated frequency band in the uplink access process of the narrowband UE is a narrowband, and when the narrowband is used to transmit data. It is easy to cause spectrum leakage and interfere with the adjacent spectrum. Therefore, the guard band can be introduced at the upper and lower boundaries of the uplink dedicated band, as shown in FIG. 3E, where the upper boundary of the uplink dedicated band is above the upper guard band, and the upper dedicated band is below the lower boundary. For the lower guard band.

It can be seen from the foregoing embodiment that in this embodiment, since no data is transmitted on the guard band, the existing UE does not schedule to transmit data on the guard band, so there is no need to specially configure or modify the existing UE. A sixth embodiment of the method for accessing a communication system of a narrowband terminal of the present application:

The difference between the embodiment and the foregoing embodiment is that, in the foregoing embodiment, the extended PBCH and the extended control channel domain may be configured in different frequency bands. In this embodiment, the extended PBCH is configured on the same frequency band as the extended control channel domain and the extended PDSCH. As shown in FIG. 3F, the extended PBCH and the extended control channel domain and the extended PDSCH are both set on the six central PRBs, so the extended PBCH does not need to specifically indicate the extended control channel domain and/or the frequency band position of the PDSCH.

In addition, it should be noted that the bandwidth of the existing SS signal and the existing PBCH are limited to six central PRBs. However, the bandwidth of the extended PBCH, the extended control channel domain, and the extended PDSCH in this embodiment may not be limited to six. The PRB is only required to satisfy a band bandwidth that is smaller than a range that the narrowband UE can receive. The extended control channel domain and the extended PDSCH are not overlapped with the existing SS signal, the existing PBCH, and the extended PBCH at the time of configuration. It can be seen from the above embodiment that the extended PBCH is configured in the same frequency band as the extended control channel domain and the extended PDSCH in this embodiment, thereby saving resources used by the base station side for dynamic configuration information of the narrowband UE, so that the narrowband UE can follow The preset configuration directly implements uplink access on the central frequency band. In the foregoing embodiments, the extended PBCH is not limited to the configuration resource that is only used by a set of narrowband UEs, and may be used to indicate configuration resources used by multiple sets of narrowband UEs. The narrowband UEs supporting different bandwidths may be based on their capabilities, types, or attributes. Find the appropriate configuration information and access the communication system. For example, the base station side can simultaneously transmit the configuration information used by the 1.4M narrowband UE and the configuration information used by the 3M narrowband UE by using the extended PBCH, which is not limited in this embodiment of the present application. As can be seen from the description of the foregoing embodiments, the application of the present application does not need to allocate a dedicated frequency band for a narrowband terminal in an existing frequency band, but configures an extended PBCH that meets its bandwidth receiving capability for a narrowband terminal, and is based on the extended PBCH. The uplink and downlink resource configuration of the narrowband terminal is completed, so that the narrowband terminal can fully utilize the existing frequency band resources to access the communication system. The embodiment of the present application describes the process of the narrowband terminal accessing the communication system from the narrowband terminal side, and corresponds to the embodiment of the narrowband terminal access communication system. The application further provides an embodiment of the downlink information sending method. The configuration and transmission process of downlink information is described from the base station side.

Referring to FIG. 4, it is a flowchart of an embodiment of a method for sending downlink information according to the present application:

Step 401: The base station configures an extended PBCH for the narrowband terminal, and the extended PBCH carries dedicated configuration information.

The base station may configure the extended PBCH in any of the following manners:

The base station configures the extended PBCH on several OFDM symbols after the existing PBCH, where the existing PBCH is configured on the OFDM symbol of the central frequency band, and the extended PBCH is configured on the OFDM symbol of the central frequency band;

The base station configures the extended PBCH at a position offset from the preset frequency band of the center band, and the preset frequency offset is carried by the existing PBCH or solidified in the narrowband terminal;

The base station configures the extended PBCH on the spare bits of the existing PBCH; The base station configures the extended PBCH on the vacant bit of the existing PBCH. When the vacant bit is insufficient, the remaining part of the extended PBCH is configured on the OFDM symbol after the existing PBCH.

The dedicated configuration information may include: extended PHICH information, and downlink dedicated frequency band indication information of the narrowband terminal; or extended PHICH information, where the downlink dedicated frequency band is pre-configured on the central frequency band; wherein the downlink dedicated frequency band is used for indicating The narrowband terminal monitors the enhanced PDCCH of the narrowband terminal on the downlink dedicated frequency band, so that the narrowband terminal receives the downlink data carried on the extended PDSCH according to the downlink scheduling information carried on the enhanced PDCCH.

Specifically, the downlink scheduling information is specifically scheduling information for scheduling the dedicated SIB, the dedicated SIB is the SIB constructed by the base station for the narrowband terminal, and the downlink data is the dedicated SIB. Or the base station allocates a dedicated time-frequency resource on the extended control channel domain to carry a dedicated SIB, where the dedicated SIB is not scheduled to be sent on the time-frequency resource, and the dedicated SIB is the base station as the narrowband. The SIB built by the terminal. Regardless of which of the above-described methods is used to carry the dedicated SIB, the dedicated SIB can be used to carry the uplink dedicated band indication information of the narrowband terminal.

The base station configures the enhanced PDCCH on a number of OFDM symbols after an existing PDCCH of each subframe in the downlink dedicated frequency band; the base station configures the extended PDSCH on the downlink dedicated frequency band to expand Configuring an OFDM symbol outside the control channel domain, or configuring the extended PDSCH at any position dynamically scheduled by the enhanced PDCCH, where the extended control channel domain includes the enhanced PDCCH, extended PHICH, and extended control format indicator channel PCFICH.

In addition to the foregoing uplink dedicated frequency band indication information for carrying the narrowband terminal through the dedicated SIB, the base station may also extend the PBCH to carry the uplink dedicated frequency band indication information of the narrowband terminal, the uplink extended PUCCH, and the indication that the narrowband terminal is in the downlink dedicated frequency band. The enhanced PDCCH is monitored, so that the narrowband terminal sends uplink data on the extended physical uplink shared channel PUSCH according to the uplink scheduling information carried on the monitored enhanced PDCCH.

Further, the base station may configure a frequency band upper boundary and a frequency band lower boundary of the uplink dedicated frequency band as an extended PUCCH of the narrowband terminal, and divide the uplink dedicated frequency band by a remaining frequency band of the upper boundary of the frequency band and a lower boundary of the frequency band. Configured as an extended _PUSCH for the narrowband terminal.

Further, the uplink dedicated band indication information further includes: a segment of the upper guard band set above the upper boundary of the band of the uplink dedicated band, and a segment of the lower guard band set below the lower boundary of the band of the downlink dedicated band. Step 402: The base station sends the extended PBCH to the narrowband terminal, so that the narrowband terminal accesses the communication system after performing downlink resource and uplink resource configuration according to the dedicated configuration information.

It can be seen from the foregoing embodiment that the present application does not need to allocate a dedicated frequency band for a narrowband terminal in an existing frequency band, but configures an extended PBCH that meets its bandwidth receiving capability for a narrowband terminal, and completes uplink and downlink resources of the narrowband terminal on the basis of extending the PBCH. The configuration enables the narrowband terminal to fully utilize the existing band resources to access the communication system. Corresponding to the method of the narrowband terminal access communication system and the embodiment of the downlink information transmission method of the present application, the present application also provides an embodiment of a narrowband terminal and a base station, respectively.

Referring to FIG. 5, it is a block diagram of a first embodiment of a narrowband terminal according to the present application:

The narrowband terminal includes: a transceiver unit 510, a reading unit 520, a configuration unit 530, and a processing unit 540.

The transceiver unit 510 is configured to receive the extended physical broadcast channel PBCH sent by the base station, and the reading unit 520 is configured to read the dedicated configuration information carried by the transceiver unit 510 on the extended PBCH.

The configuration unit 530 is configured to perform downlink resource and uplink resource configuration according to the dedicated configuration information read by the reading unit 520.

The processing unit 540 is configured to access the communication system after the configuration unit 530 is configured. Referring to FIG. 6, a block diagram of a second embodiment of the narrowband terminal of the present application is as follows:

The narrowband terminal includes: a transceiver unit 610, a reading unit 620, a judging unit 630, a configuration unit 640, and a processing unit 650.

The transceiver unit 610 is configured to receive an existing PBCH.

The reading unit 620 is configured to read the existing PBCH received by the transceiver unit 610, where the existing PBCH carries identification information indicating whether the communication system supports a narrowband terminal;

The determining unit 630 is configured to trigger, when the communication system supports the narrowband terminal according to the identifier information read by the reading unit 620, the function of the transmitting and receiving unit 610 to receive the extended PBCH sent by the base station;

The transceiver unit 610 is further configured to receive an extended physical broadcast channel PBCH sent by the base station, where the extended PBCH is located in the same subframe as the existing PBCH; The reading unit 620 is further configured to read the dedicated configuration information carried on the extended PBCH received by the transceiver unit 610;

The configuration unit 640 is configured to perform downlink resource and uplink resource configuration according to the dedicated configuration information read by the reading unit 620.

The processing unit 650 is configured to access the communication system after the configuration unit 640 is configured.

Specifically, the configuration manner of the extended PBCH received by the transceiver unit 610 includes: the extended PBCH is configured on a number of OFDM symbols after the existing PBCH, where the existing PBCH is configured on a central frequency band, The extended PBCH is configured on the central frequency band, or the extended PBCH is configured to be offset from the preset frequency of the central frequency band, and the preset frequency offset is carried by the existing PBCH or is solidified in the The extended PBCH is configured on the vacant bit of the existing PBCH; the extended PBCH is configured on the vacant bit of the existing PBCH, and when the vacant bit is insufficient, the The remaining portion of the extended PBCH is configured on the OFDM symbol following the existing PBCH.

Specifically, the reading unit 620 is configured to: read the extended physical HARQ feedback indication channel PHICH information carried on the extended PBCH, and downlink dedicated frequency band indication information of the narrowband terminal; or, the reading unit 620, Specifically, the PHICH information carried on the extended PBCH is read, and the downlink dedicated frequency band is pre-configured on a central frequency band. Further, the reading unit 620 may be specifically configured to: when the extended PBCH carries the dedicated configuration information of the at least one narrowband terminal, read the required dedicated configuration information according to the capability, type, or attribute of the extended PBCH.

Specifically, the configuration unit 640 can include (not shown in FIG. 6):

a monitoring subunit, configured to: the narrowband terminal monitors an extended physical downlink control channel PDCCH of the narrowband terminal on the downlink dedicated frequency band, and a scheduling subunit, configured to perform downlink scheduling information carried on the enhanced PDCCH according to the monitoring And receiving the downlink data carried on the extended physical downlink shared channel (PDSCH), where the enhanced PDCCH is configured on the OFDM symbols after the existing PDCCH of each subframe in the downlink dedicated frequency band; the extended PDSCH is configured in the The downlink dedicated frequency band is on the OFDM symbol except the extended control channel domain, or includes the enhanced PDCCH, the extended PHICH, and the extended control format indication channel PCFICH.

The scheduling subunit may be specifically configured to receive the dedicated SIB carried on the extended PDSCH according to the scheduled scheduling information that is scheduled to be performed on the enhanced PDCCH, and the scheduling is performed on the extended PDCCH. A dedicated SIB is a base station constructed for the narrowband terminal SIB. Or, the extended control channel domain that is monitored by the monitoring subunit further carries a dedicated SIB, where a part of dedicated time-frequency resources are allocated on the extended control channel domain for carrying a dedicated SIB, where the dedicated SIB is The non-scheduled transmission is performed on the frequency resource, where the dedicated SIB is an SIB constructed by the base station for the narrowband terminal.

Specifically, the dedicated SIB carries uplink dedicated frequency band indication information of the narrowband terminal; or, the extended PBCH carries uplink dedicated frequency band indication information of the narrowband terminal; the configuration unit 640 further includes (FIG. 6 Not shown): a sending subunit, configured to send an extended physical uplink control channel PUCCH of the narrowband terminal on the uplink dedicated frequency band; the scheduling subunit is further configured to monitor, according to the listening subunit The uplink scheduling information carried on the enhanced PDCCH is transmitted on the physical uplink shared channel (PUSCH), wherein the upper boundary of the frequency band and the lower boundary of the frequency band of the uplink dedicated frequency band are configured as an extended physical uplink control channel (PUCCH) of the narrowband terminal, The remaining frequency band of the uplink dedicated frequency band except the upper boundary of the frequency band and the lower boundary of the frequency band is configured as an extended physical uplink shared channel PUSCH of the narrowband terminal.

Specifically, the processing unit 650 may further include: (not shown in FIG. 6): a first random access subunit, configured to send, in an existing PRACH, a preamble preamble code allocated for a narrowband terminal for random access, After the base station identifies the preamble code allocated to the narrowband terminal, scheduling, by using the enhanced PDCCH, a random access response (RAR), the narrowband terminal accessing the communication system.

Specifically, the uplink dedicated frequency band indication information further includes an extended PRACH that is allocated to the narrowband terminal on the uplink dedicated frequency band. The processing unit 650 may further include (not shown in FIG. 6): An access subunit, configured to send a preamble code on the extended PRACH of the narrowband terminal on the uplink dedicated frequency band, and perform random access by using the extended PRACH, so that the base station schedules a RAR by using the enhanced PDCCH, The narrowband terminal is implemented to access the communication system.

Further, the transceiver unit 610 is further configured to: after the narrowband terminal accesses the communication system, send an uplink channel sounding reference to each OFDM symbol of the last OFDM symbol in each subframe of the uplink dedicated frequency band. Signal SRS.

Further, the reading unit 620 is specifically configured to read the required special configuration information according to its own capability, type or attribute when the dedicated configuration information of the at least one narrowband terminal is carried on the extended PBCH of the transceiver unit 610. Referring to FIG. 7, a block diagram of an embodiment of a base station of the present application is as follows:

The base station includes: a configuration unit 710 and a transceiver unit 720.

The configuration unit 710 is configured to configure an extended physical broadcast channel PBCH for the narrowband terminal, and extend dedicated configuration information on the PBCH;

The transceiver unit 720 is configured to send the extended PBCH configured by the configuration unit 710 to the narrowband terminal, so that the narrowband terminal performs downlink resource and uplink resource configuration according to the dedicated configuration information, and then accesses the communication system.

The configuration unit 710 configures the extended PBCH in any one of the following manners: configuring the extended PBCH on several orthogonal frequency division multiplexing OFDM symbols after the existing PBCH, where The existing PBCH is configured on the OFDM symbol of the central frequency band, and the extended PBCH is configured on the OFDM symbol of the central frequency band;

Arranging the extended PBCH at a position offset from a preset frequency of the central frequency band, the preset frequency offset being carried by the existing PBCH or being solidified in the narrowband terminal; configuring the extended PBCH On the spare bits of the existing PBCH;

And configuring the extended PBCH on the vacant bit of the existing PBCH, and when the vacant bit is insufficient, configuring the remaining part of the extended PBCH on the OFDM symbol after the existing PBCH.

The dedicated configuration information configured by the configuration unit 710 includes:

And extending the PHICH information, and the downlink dedicated frequency band is pre-configured on the central frequency band; wherein the downlink dedicated frequency band is used to indicate that the narrowband terminal is in the downlink dedicated frequency band. The uplink PDCCH of the narrowband terminal is monitored, so that the narrowband terminal receives the downlink data carried on the extended PDSCH according to the downlink scheduling information carried on the enhanced PDCCH, where the downlink scheduling information is specifically scheduled for the dedicated SIB. Scheduling information, where the dedicated SIB is an SIB constructed by the base station for the narrowband terminal, and the downlink data is specifically the dedicated SIB.

The configuration unit 710 is specifically configured to: configure the enhanced PDCCH on a number of OFDM symbols after an existing PDCCH in each subframe of the downlink dedicated frequency band; and configure the extended PDSCH in the downlink Configuring, on the dedicated frequency band, an OFDM symbol other than the extended control channel domain, or configuring the extended PDSCH at any position dynamically scheduled by the enhanced PDCCH, where the extended control channel domain includes the enhanced PDCCH, the extended PHICH, and The extended control format indicates the channel PCFICH. Further, the configuration unit 710 is further configured to: allocate dedicated time-frequency resources on the extended control channel domain to carry a dedicated SIB, where the dedicated SIB is not scheduled to be sent on the time-frequency resource, where the dedicated SIB For the SIB that is configured by the base station for the narrowband terminal, the dedicated SIB carries the uplink dedicated frequency band indication information of the narrowband terminal.

The uplink dedicated frequency band is used to indicate that the narrowband terminal transmits the extension of the narrowband terminal on the uplink dedicated frequency band, where the extended PBCH configured by the configuration unit 710 carries the uplink dedicated frequency band indication information of the narrowband terminal. a PUCCH, and instructing the narrowband terminal to listen to the enhanced PDCCH on the downlink dedicated frequency band, so that the narrowband terminal sends an uplink on the extended physical uplink shared channel PUSCH according to uplink scheduling information carried on the monitored enhanced PDCCH. data.

Further, the configuration unit 710 is further configured to configure a frequency band upper boundary and a frequency band lower boundary of the uplink dedicated frequency band as an extended PUCCH of the narrowband terminal, and divide the uplink dedicated frequency band by an upper boundary and a frequency band of the frequency band. The remaining frequency band of the lower boundary is configured as an extended PUSCH of the narrowband terminal. The uplink dedicated frequency band indication information further includes: an upper guard frequency band set above the upper boundary of the frequency band of the uplink dedicated frequency band, and a lower guard frequency band set below the lower boundary of the frequency band of the downlink dedicated frequency band. The description of the foregoing embodiment shows that, in the embodiment of the present application, the narrowband terminal receives the extended PBCH sent by the base station, and reads the dedicated configuration information carried on the extended PBCH, and the narrowband terminal performs downlink resource and uplink resource configuration according to the dedicated configuration information. Access to the communication system upon completion. The embodiment of the present application does not need to allocate a dedicated frequency band for the narrowband terminal in the existing frequency band, but configures the extended PBCH that meets the bandwidth receiving capability of the narrowband terminal, and completes the uplink and downlink resource configuration of the narrowband terminal on the basis of the extended PBCH. The narrowband terminal is enabled to fully utilize existing frequency band resources to access the communication system.

It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or in some portions of the embodiments. The various embodiments in the present specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request

A method for accessing a communication system in a narrowband terminal, comprising:

The narrowband terminal reads dedicated configuration information carried on the extended PBCH;

The method according to claim 1, wherein before the narrowband terminal receives the extended PBCH sent by the base station, the method further includes:

The narrowband terminal reads the received existing PBCH, and the existing PBCH carries identifier information indicating whether the communication system supports the narrowband terminal;

When it is determined that the communication system supports the narrowband terminal according to the identification information, the step of performing the extended PBCH sent by the receiving base station is triggered.

The method according to claim 1 or 2, wherein the narrowband terminal reads the dedicated configuration information carried on the extended PBCH, including:

The narrowband terminal reads the extended physical hybrid automatic retransmission HARQ feedback indication channel PHICH information carried on the extended PBCH, and the downlink dedicated frequency band indication information of the narrowband terminal; or

The narrowband terminal reads extended PHICH information carried on the extended PBCH, and the downlink dedicated frequency band is pre-configured on a central frequency band.

The method according to claim 3, wherein the downlink resource configuration by the narrowband terminal according to the dedicated configuration information includes:

The narrowband terminal monitors the extended physical downlink control channel PDCCH of the narrowband terminal on the downlink dedicated frequency band;

Receiving downlink data carried on the extended physical downlink shared channel PDSCH according to the monitored downlink scheduling information carried on the extended PDCCH;

The extended PDCCH is configured on a number of OFDM symbols after an existing PDCCH of each subframe in the downlink dedicated frequency band;

The extended PDSCH is configured on the downlink dedicated frequency band on an OFDM symbol other than the extended control channel domain, or the extended PDSCH configuration is performed by the enhanced PDCCH. Any position of the dynamic scheduling, the extended control channel domain includes the enhanced PDCCH, the extended PHICH, and the extended control format indication channel PCFICH.

The method according to claim 4, wherein the receiving the downlink data carried on the extended PDSCH according to the downlink scheduling information carried on the monitored enhanced PDCCH comprises: the narrowband terminal according to the monitored Scheduling information for scheduling the dedicated system information block SIB carried on the PDCCH, and receiving the dedicated SIB carried on the extended PDSCH, where the dedicated SIB is an SIB constructed by the base station for the narrowband terminal.

The method according to claim 4, wherein the extended control channel domain includes dedicated time-frequency resources allocated by the base station, and the dedicated time-frequency resources are used to carry a dedicated SIB, and the dedicated SIB Unscheduled transmission on the time-frequency resource, where the dedicated SIB is an SIB constructed by the base station for the narrowband terminal.

The method according to claim 5 or 6, wherein the dedicated SIB carries uplink dedicated frequency band indication information of the narrowband terminal.

The method according to any one of claims 1 to 4, wherein the extended PBCH carries uplink dedicated frequency band indication information of the narrowband terminal.

The method according to claim 1, 7 or 8, wherein the narrowband terminal performs uplink resource configuration according to the dedicated configuration information, including: a row control channel PUCCH;

The narrowband terminal monitors the extended PDCCH of the narrowband terminal on the downlink dedicated frequency band;

The narrowband terminal sends uplink data on the extended physical uplink shared channel PUSCH according to the uplink scheduling information carried on the monitored extended PDCCH;

among them,

The upper boundary of the frequency band and the lower boundary of the frequency band of the uplink dedicated frequency band are configured as an extended PUCCH of the narrowband terminal, and the remaining frequency band of the uplink dedicated frequency band except the upper boundary of the frequency band and the lower boundary of the frequency band is configured as an extension of the narrowband terminal PUSCH.

The method according to claim 9, wherein the performing, by the narrowband terminal, the uplink resource configuration further comprises:

The narrowband terminal sends a preamble preamble code allocated for the narrowband terminal in the existing physical random access channel PRACH to perform random access, so that the base station recognizes the narrowband end After the preamble code is allocated, the random access PDCCH is scheduled by the enhanced PDCCH to implement the narrowband terminal accessing the communication system.

The method according to claim 9, wherein the uplink dedicated frequency band indication information further includes an extended PRACH allocated for the narrowband terminal on the uplink dedicated frequency band;

And performing the uplink resource configuration according to the specific configuration information, further comprising: sending a preamble code, performing random access by using the extended PRACH, so that the base station scheduling the RAR by using the enhanced PDCCH, and implementing the narrowband terminal accessing the Communication Systems.

The method according to claim 1 or 9, wherein the method further comprises: after the narrowband terminal accesses the communication system, the narrowband terminal is in each subframe of the uplink dedicated frequency band The uplink channel sounding reference signal SRS is transmitted by the other OFDM symbols except the last OFDM symbol.

The method according to claim 1, wherein when the extended PBCH carries the dedicated configuration information of the at least one narrowband terminal, the narrowband terminal receiving the extended PBCH reads according to its own capability, type or attribute. Take the required configuration information.

14. A method for transmitting downlink information, characterized in that:

The method according to claim 14, wherein the base station configures the extended PBCH in any of the following manners:

The base station configures the extended PBCH on several orthogonal frequency division multiplexing OFDM symbols after the existing PBCH, where the existing PBCH is configured on an OFDM symbol of a central frequency band, and the extended PBCH is configured in the On the OFDM symbol of the center band;

The base station configures the extended PBCH at a position offset from a preset frequency of the central frequency band, and the preset frequency offset is carried by the existing PBCH or solidified in the narrowband terminal;

The base station configures the extended PBCH on a spare bit of the existing PBCH; The base station configures the extended PBCH on the vacant bit of the existing PBCH, and when the vacant bit is insufficient, configures the remaining part of the extended PBCH on the OFDM symbol after the existing PBCH .

16. The method according to claim 14, wherein the dedicated configuration information comprises:

And extending the PHICH information, and the downlink dedicated frequency band is pre-configured on the central frequency band; wherein the downlink dedicated frequency band is used to indicate that the narrowband terminal is in the downlink dedicated frequency band. The enhanced PDCCH of the narrowband terminal is monitored, so that the narrowband terminal receives the downlink data carried on the extended PDSCH according to the downlink scheduling information carried on the enhanced PDCCH.

The method according to claim 16, wherein the downlink scheduling information is scheduling information for scheduling a dedicated SIB, and the dedicated SIB is a SIB constructed by the base station for the narrowband terminal;

The downlink data is the dedicated SIB.

18. The method of claim 16 wherein:

The base station configures the extended PDCCH on a number of OFDM symbols after an existing PDCCH of each subframe in the downlink dedicated frequency band;

The base station configures the extended PDSCH on the OFDM symbol except the extended control channel domain on the downlink dedicated frequency band, or configures the extended PDSCH at any position dynamically scheduled by the enhanced PDCCH, The extended control channel domain includes the enhanced PDCCH, the extended PHICH, and the extended control format indicator channel PCFICH.

The method according to claim 17, wherein the method further comprises: the base station dividing a dedicated time-frequency resource on the extended control channel domain for carrying a dedicated

The SIB, the dedicated SIB is unscheduledly transmitted on the time-frequency resource, and the dedicated SIB is a SIB constructed by the base station for the narrowband terminal.

The method according to claim 18 or 19, wherein the dedicated SIB carries uplink dedicated frequency band indication information of the narrowband terminal.

The method according to claim 17, wherein the extended PBCH carries uplink dedicated frequency band indication information of the narrowband terminal, and the uplink dedicated frequency band is used to indicate that the narrowband terminal is indicated to be in the downlink Listening to the enhanced PDCCH on a dedicated frequency band to enable the The narrowband terminal sends uplink data on the extended physical uplink shared channel PUSCH according to the uplink scheduling information carried on the enhanced enhanced PDCCH.

22. The method of claim 21, wherein

The base station configures a frequency band upper boundary and a frequency band lower boundary of the uplink dedicated frequency band as an extended PUCCH of the narrowband terminal, and configures, in the uplink dedicated frequency band, a remaining frequency band of the upper boundary of the frequency band and a lower boundary of the frequency band as a An extended PUSCH of a narrowband terminal.

The method according to claim 21, wherein the uplink dedicated frequency band indication information further comprises: an upper guard frequency band set above an upper boundary of a frequency band of the uplink dedicated frequency band, and is disposed in the downlink dedicated A lower guard band below the lower boundary of the band of the band.

24. A narrowband terminal, comprising:

a reading unit, configured to read special configuration information carried on the extended PBCH received by the transceiver unit;

a configuration unit, configured to perform downlink resource and uplink resource configuration according to the dedicated configuration information read by the reading unit;

25. The narrowband terminal of claim 24, wherein

The transceiver unit is further configured to receive an existing PBCH;

The reading unit is further configured to read the existing PBCH received by the transceiver unit, where the existing PBCH carries identifier information indicating whether the communication system supports a narrowband terminal; the narrowband terminal further includes :

And a determining unit, configured to: when the communication system supports the narrowband terminal according to the identifier information of the reading unit, trigger the sending and receiving unit to receive the function of the extended PBCH sent by the base station.

26. The narrowband terminal of claim 24, wherein

The reading unit, specifically for reading the dedicated configuration information carried on the extended PBCH, includes: reading extended PHICH information carried on the extended PBCH, and downlink dedicated frequency band indication information of the narrowband terminal; or And reading the extended PHICH information carried on the extended PBCH, where the downlink dedicated frequency band is pre-configured on the central frequency band.

The narrowband terminal according to claim 26, wherein the configuration unit comprises: a monitoring subunit, configured to monitor an extended PDCCH of the narrowband terminal on a downlink dedicated frequency band read by the reading unit;

a scheduling subunit, configured to receive downlink data carried on the extended PDSCH according to the downlink scheduling information carried on the extended PDCCH that is monitored by the listening subunit;

among them,

And the extended PDSCH is configured on the OFDM symbol except the extended control channel domain, or the extended PDSCH is configured at any position dynamically scheduled by the enhanced PDCCH, where the extended control channel domain includes The enhanced PDCCH, extended PHICH, and extended control format indication channel PCFICH.

The narrowband terminal according to claim 27, wherein the scheduling subunit is specifically configured to: according to the monitored scheduling information that is scheduled on the enhanced PDCCH and that is scheduled for the dedicated system information block SIB, The dedicated SIB carried on the extended PDSCH, where the dedicated SIB is an SIB constructed by the base station for the narrowband terminal.

The narrowband terminal according to claim 27, wherein the extended control channel domain monitored by the monitoring subunit further carries a dedicated SIB, and the extended control channel domain includes the base station The dedicated time-frequency resource, the dedicated time-frequency resource is used to carry a dedicated SIB, and the dedicated SIB is not scheduled to be sent on the time-frequency resource, where the dedicated SIB is an SIB constructed by the base station for the narrow-band terminal.

The narrowband terminal according to claim 28 or 29, wherein the dedicated SIB carries uplink dedicated frequency band indication information of the narrowband terminal.

The narrowband terminal according to any one of claims 24 to 27, wherein the extended PBCH carries uplink dedicated frequency band indication information of the narrowband terminal.

The narrowband terminal according to claim 30 or 31, wherein the configuration unit further comprises: an uplink control channel PUCCH;

The scheduling sub-unit is further configured to send uplink data on the physical uplink shared channel PUSCH according to the uplink scheduling information carried on the enhanced PDCCH that is monitored by the monitoring subunit; among them,

The upper boundary of the frequency band and the lower boundary of the frequency band of the uplink dedicated frequency band are configured as an extended PUCCH of the narrowband terminal, and the remaining frequency band of the uplink dedicated frequency band except the upper boundary of the frequency band and the lower boundary of the frequency band is configured as an extension of the narrowband terminal Physical uplink shared channel PUSCH.

The narrowband terminal according to claim 32, wherein the processing unit further comprises:

a first random access sub-unit, configured to send a preamble preamble code allocated for the narrowband terminal in the existing physical random access channel (PRACH) to perform random access, so that the base station identifies the preamble allocated to the narrowband terminal After the code, the random access response RAR is scheduled by the enhanced PDCCH, so that the narrowband terminal accesses the communication system.

The narrowband terminal according to claim 32, wherein the uplink dedicated frequency

PRACH;

The processing unit further includes: transmitting a preamble code on the extended PRACH, and performing random access by using the extended PRACH, so that the base station performs RAR scheduling by using the extended PDCCH, so that the narrowband terminal accesses the communication system.

35. The narrowband termination of claim 24 or 32, wherein

The transceiver unit is further configured to send, after the narrowband terminal accesses the communication system, an uplink channel sounding reference signal SRS, except for another OFDM symbol of the last OFDM symbol, in each subframe of the uplink dedicated frequency band.

The narrowband terminal according to claim 24, wherein the reading unit is specifically configured to: when the dedicated configuration information of the at least one narrowband terminal is carried on the extended PBCH, according to its own capability, type or attribute Read the required configuration information.

37. A base station, comprising:

a transceiver unit, configured to send the extended PBCH configured by the configuration unit to the narrowband terminal, so that the narrowband terminal performs downlink resources and uplink resources according to the dedicated configuration information. After the source is configured, it is connected to the communication system.

The base station according to claim 37, wherein the configuration unit configures the extended PBCH in any one of the following manners:

Configuring the extended PBCH on a number of orthogonal frequency division multiplexed OFDM symbols after the existing PBCH, where the existing PBCH is configured on an OFDM symbol of a center band, and the extended PBCH is configured at the center On the OFDM symbol of the frequency band;

The base station according to claim 37, wherein the dedicated configuration information configured by the configuration unit includes:

40. The base station according to claim 39, characterized in that

The configuration unit is configured to configure the enhanced PDCCH on a number of OFDM symbols after an existing PDCCH of each subframe in the downlink dedicated frequency band; and configure the extended PDSCH on the downlink dedicated frequency band. Deploying the extended PDSCH at any position other than the extended control channel domain, or configuring the extended PDSCH to be dynamically scheduled by the enhanced PDCCH, the extended control channel domain including the enhanced PDCCH, the extended PHICH, and the extended control format Indicates the channel PCFICH.

The base station according to claim 40, wherein the configuration unit is further configured to allocate dedicated time-frequency resources on the extended control channel domain for carrying a dedicated SIB, where the dedicated SIB is in the Unscheduled transmission on the time-frequency resource, where the dedicated SIB is the base station for the narrowband end The SIB is configured to carry the uplink dedicated frequency band indication information of the narrowband terminal in the dedicated SIB.

The base station according to claim 40, wherein the extended PBCH configured by the configuration unit carries uplink dedicated frequency band indication information of the narrowband terminal, the uplink dedicated PUCCH, and the indication that the narrowband terminal is The enhanced PDCCH is monitored on the downlink dedicated frequency band, so that the narrowband terminal sends uplink data on the extended physical uplink shared channel (PUSCH) according to the uplink scheduling information carried on the monitored enhanced PDCCH.

The base station according to claim 42, wherein the configuration unit is further configured to configure a frequency band upper boundary and a frequency band lower boundary of the uplink dedicated frequency band as an extended PUCCH of the narrowband terminal, where The remaining frequency band on the uplink dedicated frequency band except the upper boundary of the frequency band and the lower boundary of the frequency band is configured as an extended PUSCH of the narrowband terminal.

The base station according to claim 42, wherein the uplink dedicated frequency band indication information further includes: an upper guard frequency band set above an upper boundary of a frequency band of the uplink dedicated frequency band, and is disposed in the downlink dedicated A lower guard band below the lower boundary of the band of the band.