CN107135533B - Signal transmission method, terminal and network side equipment - Google Patents

Signal transmission method, terminal and network side equipment Download PDF

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Publication number
CN107135533B
CN107135533B CN201610108086.9A CN201610108086A CN107135533B CN 107135533 B CN107135533 B CN 107135533B CN 201610108086 A CN201610108086 A CN 201610108086A CN 107135533 B CN107135533 B CN 107135533B
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msgn
reference signal
resource
terminal
network side
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CN107135533A (en
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郝鹏
张峻峰
薛妍
李剑
晏潇
陆海涛
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2017/074740 priority patent/WO2017144012A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

After receiving a request message MSG1 sent by a terminal, a network side device sends a message MSGn to the terminal, and the MSGn indicates a reference signal resource used by the network side device for sending a first reference signal. After the terminal sends a request message MSG1 to the network side equipment, the terminal receives a message MSGn sent by the network side equipment, and determines reference signal resources used by the network side equipment for sending a first reference signal according to the MSGn. The method and the device realize that the network side equipment responds to the terminal request to send the first reference signal again, can reduce the resource overhead of sending the first reference signal, and effectively save the transmitting power of the network side equipment.

Description

Signal transmission method, terminal and network side equipment
Technical Field
The present invention relates to communication technologies, and in particular, to a signal transmission method, a terminal, and a network side device.
Background
The data throughput of the wireless system mostly occurs in indoor and hot spot scenes, and the data traffic proportion of the indoor and hot spot scenes in the future is further increased. Because the traditional cellular network technology needs to meet the coverage requirement firstly, the networking initial stage is usually 'heavy outdoor, light indoor', 'heavy cellular networking, light isolated hot spot', 'heavy mobile switching, light fixed nomadic'. However, as the demand for network wide coverage is gradually met with the increase of the density of base stations, the demand for increased data traffic has become very important. One of the working key points of the Long-Term Evolution advanced (Long-Term Evolution advanced, LTE-a) system is to construct a new functional entity for indoor and hot-spot scenes. From Release 10, a third Generation Partnership Project (3rd Generation Partnership Project, 3GPP for short) proposes a technology for performing Heterogeneous network (Heterogeneous Networks) networking in LTE-a to improve system throughput and overall network efficiency. The Release12 version defines the enhancement function of a micro cell (Small cell, which is also used for representing a corresponding Small base station) under the heterogeneous network, so as to further improve the green energy saving and the self-organizing networking performance of the low-power node. The heterogeneous network structure introduces some transmission nodes with smaller transmission power compared to the conventional cell base station, including picocells (picocells), Femtocells (Femtocells), and Relay stations (Relay) for signal relaying. The introduction of the nodes can provide good guarantee for the coverage of indoor and hot spot scenes; the transmitting power of the nodes is small, so that the network can be flexibly deployed; meanwhile, the coverage range of the nodes is small, and potential high-frequency spectrum of LTE Advanced can be more conveniently utilized. However, the heterogeneous networks in the previous versions generally assume that Small cells have no more than 4 or 10 cells under the same coverage of a macro base station, and the density is far from enough relative to the capacity requirement of the next 10 years.
In future wireless access networks, the deployment density of low-power nodes is further increased to meet the requirement of ensuring the increase of throughput per unit area in the 5G era, and the deployment density of the low-power nodes can reach 1: 1, in a ratio of 1. It is expected that as the number and density of nodes increase, greater challenges are faced with respect to overall power consumption requirements and interference coordination control.
Small cell functions of 3GPP Release12 version which have been finalized at present mainly reduce power consumption and mutual interference by designing discovery signals and On/Off mechanisms. The method comprises the steps that under the condition that the Small cell has no service requirement, almost all transmitting signals are closed, only Discovery Reference Signals (DRS) with the period of tens of milliseconds (ms) are reserved, necessary system information is sent to enable a terminal to Discover and detect that one Small cell exists, and when the terminal or the Small cell has the service requirement to initiate, the Small cell opens normal transmitting signals which comprise all public signaling, special signaling, data channels and the like to carry out service transmission. This On/off mechanism in conjunction with DRS discovery signals can save power during non-traffic periods and reduce external interference.
The inventor of the present invention finds that, in the process of implementing the present invention, DRS itself includes a combination of Cell-specific Reference Signal (CRS, also referred to as common Reference Signal), Primary Synchronization Signal (PSS), and secondary Synchronization Signal SSS, and although the transmission frequency is limited, the power overhead is still relatively large, and these powers are wasted when CRS + PSS/SSS do not need to be read. In addition, the information interaction between the Small cell and the terminal must be controlled by the macro base station, that is, the awakening of the Small cell is that the terminal notifies the macro base station and the macro base station awakens the Small cell. For 5G wireless systems, the system may be stand alone networked and not dependent on previous networks, so the corresponding wake-up mechanism cannot be used.
Disclosure of Invention
In view of this, the present invention provides the following.
A method of signal transmission, comprising:
the network side equipment receives a request message MSG1 sent by a terminal;
after receiving the MSG1, the network side equipment sends a message MSGn to a terminal, and the MSGn indicates a reference signal resource used by the network side equipment for sending a first reference signal.
A network side device comprises a message receiving module and a message sending module, wherein:
the message receiving module is used for receiving a request message MSG1 sent by a terminal;
the message sending module is configured to send a message MSGn to a terminal after the message receiving module receives the MSG1, where the MSGn indicates a reference signal resource used by the network-side device to send a first reference signal.
A method of signal transmission, comprising:
the terminal sends a request message MSG1 to the network side equipment;
and after the terminal sends the MSG1, receiving a message MSGn sent by the network side equipment, and determining reference signal resources used by the network side equipment for sending a first reference signal according to the MSGn.
A terminal comprising a message sending module and a message receiving module, wherein:
the message sending module is used for sending a request message MSG1 to the network side equipment;
the message receiving module is configured to receive the message MSGn sent by the network side device after the message sending module sends the MSG1, and determine, according to the MSGn, a reference signal resource used by the network side device to send a first reference signal.
The scheme realizes that the network side equipment responds to the terminal request to send the first reference signal again, can reduce the resource overhead of sending the first reference signal, and effectively saves the transmitting power of the network side equipment.
Drawings
FIG. 1 is a schematic diagram of an exemplary networking of embodiments of the present invention;
fig. 2 is a flowchart of a signal transmission method of a network side device according to an embodiment of the present invention;
FIG. 3 is a block diagram of a network-side device according to an embodiment of the present invention;
fig. 4 is a flowchart of a signal transmission method of a second terminal according to an embodiment of the present invention;
fig. 5 is a block diagram of a second terminal according to an embodiment of the present invention;
FIG. 6 is a signaling flow diagram illustrating a signaling method of the present invention;
FIG. 7 is a signaling flow diagram of an exemplary two signal transmission method of the present invention;
fig. 8 is a signaling flow diagram of an exemplary three signal transmission method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Example one
In an exemplary networking of the embodiment of the present invention, the network includes a TP and a terminal of a new Radio Access Technology (new RAT for short) system, and may further include a macro base station of a conventional Radio Access system and/or a new RAT. The conventional wireless access system can be, for example, a CDMA system, an LTE system (including LTE-a), a UMTS system, an 802.11 system, a GSM system, and the like. The new radio access system may be, for example, a radio access system in 5G. A plurality of TP clusters exist in a service area of a macro base station, each TP cluster containing one or more TPs. Fig. 1 shows a Macro base station (Macro eNB) with 2 clusters of TPs within its service area, 3 TPs in cluster 1 and 1 TP in cluster 2.
The signal transmission method of the network side device in this embodiment is shown in fig. 2, and includes:
step 110, the network side equipment receives a request message MSG1 sent by the terminal;
the network side device in this embodiment takes a TP in a new wireless access system as an example. It should be noted that MSG1 is a simplified form of the request message sent by the terminal in this step, so as to facilitate the description, and the message with the same representation form as that in the prior art is not necessarily the same, and should be controlled by the message referred to herein. The same is true of MSGn, MSG2, and MSG4 herein.
In this embodiment, MSG1 is an access request message sent when the terminal initiates uplink access. The terminal can acquire the MSG1 resource and/or the MSG1 resource range used by the MSG1 from the access configuration information sent by the network side.
The MSG1 sent by the receiving terminal of the network side device includes: and the network side equipment receives the MSG1 on the MSG1 resource used by the MSG1 in the transmission process, or blindly detects the MSG1 in the range of the MSG1 resource used by the MSG1 in the transmission process.
Step 120, after receiving the MSG1, the network side device sends a message MSGn to the terminal, and indicates, in the MSGn, a reference signal resource used by the network side device to send the first reference signal.
In this embodiment, MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the network side device to the terminal in the terminal uplink access process. The network side device sending the MSGn may include: and the network side equipment receiving the MSG1 transmits the MSGn on the MSGn resource used for transmitting the MSGn or in the range of the MSGn resource. For example, when the MGSn is MSG2, MSG2 is transmitted on MSG2 resource or within MSG2 resource; when MSGn is MSG4, MSG4 is transmitted on MGS4 resources. The terminal can obtain the MSG2 resource and/or the MSG2 resource range used by the MSG2 transmission and the MSG4 resource used by the MSG4 transmission from the access configuration information transmitted by the network side.
In this embodiment, the reference signal resource is a dedicated resource allocated by the network side device in response to the terminal access, or a common resource allocated by the network side device for the terminal access.
In this embodiment, in order to avoid interference, network side devices in the same cluster, such as a TP, send MSGn resources or MSGn resource ranges that are used by the MSGn, which are staggered from each other, that is, at least one of the time domain, the frequency domain, the space domain, and the code domain is different. The MSGn resource or MSGn resource range is determined according to the following: specified in an access configuration set ACS or other system information; or the network side equipment in the same cluster negotiates and determines; or the network side equipment in the same cluster and the network side equipment in the adjacent cluster are determined through negotiation. In addition, when the network side equipment transmits the MSGn, if the terminal is determined to be accessed to the network, the MSGn resource is preferentially used to transmit the MSGn in the range of the MSGn resource and the MSGn resource, so that possible collision is avoided.
In this embodiment, the indicating, by the network side device, the reference signal resource in the MSGn includes: displaying all parameters indicating the reference signal resources in the MSGn; or implicitly indicating all parameters of the reference signal resources in MSGn; or a partial parameter indicating the reference signal resource is hidden in the MSGn, and another partial parameter indicating the reference signal resource is displayed; wherein the display indication indicates parameters of filling the reference signal resource in the MSGn, the implicit indication indicates parameters of the reference signal resource indirectly through the MSGn, and the parameters include one or more of the following: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
In this embodiment, the step of the network side device implicitly indicating all or part of parameters of the reference signal resource in the MSGn includes: the network side equipment indicates all or part of parameters of the reference signal resource through the MSGn resource or the range of the MSGn resource used by the MSGn transmission and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
In this embodiment, after the network side device sends the MSGn, the method further includes: and the network side equipment sends a first reference signal on the reference signal resource, wherein the first reference signal is used for realizing at least one of wireless resource management measurement, channel estimation, channel measurement, accurate synchronous tracking and beam training after being received by the terminal. The network side device may send the first reference signal on the reference signal resource within a set maximum sending duration in a set sending period until receiving a message fed back by the terminal after receiving the first reference signal or reaching the maximum sending duration. Wherein, the message fed back by the terminal after receiving the first reference signal carries one or more of the following information: and the terminal measures the result of the first reference signal and determines the information of the network side equipment to be accessed. In another embodiment, the network side device may also send the first reference signal on the reference signal resource at a set sending period all the time after receiving the MSG 1.
In a TP cluster of a new wireless access system, only a portion of TPs (e.g., one TP) may transmit DRS signals, which may be different from DRS signals in LTE, and other TPs without traffic demand may be in a dormant state, not transmitting signals. If the MSG1 sent by the TP receiving terminal is in a dormant state before, the sent first reference signal comprises a DRS; the first reference signal may not include the DRS if the TP receives the DRS periodically transmitted before MSG1 transmitted by the terminal.
The present embodiment further provides a network side device, as shown in fig. 3, including a message receiving module 10 and a message sending module 20, where:
the message receiving module 10 is configured to receive a request message MSG1 sent by a terminal;
the message sending module 20 is configured to send a message MSGn to the terminal after the message receiving module receives the MSG1, where the MSGn indicates a reference signal resource used by the network-side device to send the first reference signal.
Alternatively,
the MSG1 is an access request message sent when the terminal initiates uplink access;
the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the message sending module to the terminal in the process of uplink access of the terminal.
Alternatively,
the message sending module sends the MSGn, and comprises: the message sending module sends the MSGn on the MSGn resource used for sending the MSGn or in the range of the MSGn resource.
Alternatively,
the message sending module sends the MSGn, and comprises: the message sending module sends the MSGn by preferentially using the MSGn resource in the range of the MSGn resource and the MSGn resource when the terminal has access to the network.
Alternatively,
message sending modules of network side equipment in the same cluster send MSGn resources used by the MSGn to be staggered with each other, and the MSGn resources or the range of the MSGn resources are determined according to the following modes: specified in an access configuration set ACS or other system information; or the network side equipment in the same cluster negotiates and determines; or the network side equipment in the same cluster and the network side equipment in the adjacent cluster are determined through negotiation. .
Alternatively,
the message receiving module receives the MSG1 sent by the terminal, and comprises: the message receiving module receives the MSG1 on the MSG1 resource used by the MSG1 transmission or blindly detects the MSG1 in the range of the MSG1 resource used by the MSG1 transmission.
Alternatively,
the network side device further includes a resource allocation module, configured to allocate the reference signal resource, where the reference signal resource is a dedicated resource allocated in response to the terminal access, or a common resource allocated for the terminal access.
Alternatively,
the message sending module indicates the reference signal resource in the MSGn, including: displaying all parameters indicating the reference signal resources in the MSGn; or implicitly indicating all parameters of the reference signal resources in MSGn; or a partial parameter indicating the reference signal resource is hidden in the MSGn, and another partial parameter indicating the reference signal resource is displayed;
wherein the display indication indicates parameters of filling the reference signal resource in the MSGn, the implicit indication indicates parameters of the reference signal resource indirectly through the MSGn, and the parameters include one or more of the following: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
Alternatively,
the message sending module implicitly indicates all or part of parameters of the reference signal resources in the MSGn, and the method comprises the following steps: the message sending module indicates all or part of parameters of the reference signal resource through the MSGn resource or the range of the MSGn resource used by the MSGn sending and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
Alternatively,
after the message sending module sends the MSGn, the message sending module is further configured to send a first reference signal on the reference signal resource, where the first reference signal is used for a terminal to perform at least one of radio resource management measurement, channel estimation, channel measurement, precise synchronization tracking, and beam training after receiving the first reference signal.
Alternatively,
the message sending module sends a first reference signal on the reference signal resource, and includes: and sending the first reference signal on the reference signal resource within a set maximum sending time length in a set sending period until receiving a message fed back by the terminal after receiving the first reference signal or reaching the maximum sending time length.
Alternatively,
the network side equipment is a transmission node in a novel wireless access system, and one or more transmission nodes form a transmission node cluster.
Alternatively,
before a message receiving module in the transmission node receives MSG1 sent by a terminal, the transmission node is in a dormant state, and the first reference signal comprises a discovery reference signal DRS; or
And a message receiving module in the transmission node periodically transmits the DRS before receiving the MSG1 transmitted by the terminal, wherein the first reference signal does not include the DRS.
Example two
The networking of this embodiment may be the same as that of embodiment one. In the first embodiment, a signal transmission method is described from a network side device, and in the second embodiment, a signal transmission method is described from a terminal, where a manner of sending and receiving signals by the network side device may be the same as that in the first embodiment.
The signal transmission method of the terminal of the embodiment is shown in fig. 4, and includes:
step 210, the terminal sends a request message MSG1 to the network side equipment;
in this embodiment, the MSG1 is an access request message sent when the terminal initiates uplink access. The access request message may be an access request message sent when the terminal initially accesses, or an access request message sent when the terminal actively applies for measurement after accessing the network.
In this embodiment, the sending, by the terminal, the MSG1 to the network side device includes: the terminal transmits the MSG1 on the MSG1 resource used by the MSG1 transmission, or selects the MSG1 resource in the MSG1 resource range used by the MSG1 transmission and transmits the MSG1 on the selected MSG1 resource.
In this embodiment, the network side device is a transmission node in a novel wireless access system, and the terminal is a terminal having a function of accessing the transmission node.
Step 220, after the terminal sends the MSG1, the terminal receives the message MSGn sent by the network side device, and determines the reference signal resource used by the network side device to send the first reference signal according to the MSGn.
In this embodiment, the reference signal resource is a dedicated resource allocated by the network side device in response to the terminal access, or a common resource allocated by the network side device for the terminal access.
In this embodiment, the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the network side device to the terminal in the process of uplink access of the terminal; accordingly, the terminal receives the MSGn, including: the terminal receives the MSGn by the MSGn resource used by the MSGn transmission or blindly detects the MSGn within the range of the MSGn resource used by the MSGn transmission.
In this embodiment, the determining, by the terminal, the reference signal resource according to the MSGn includes: the terminal acquires all parameters of the reference signal resource from the MSGn sent by the network side equipment; or determining all parameters of the reference signal resource according to the MSGn and an agreed rule; or determining a part of parameters of the reference signal resource according to the MGSn and an agreed rule, and acquiring another part of parameters of the reference signal resource from the MSGn; wherein the parameters of the reference signal resource include one or more of: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information. The terminal can determine all or part of parameters of the reference signal resource according to the MSGn resource or the range of the MSGn resource used for transmitting the MSGn and the preset position relationship between the MSGn resource or the range of the MSGn resource and the reference signal resource.
In this embodiment, after the terminal determines the reference signal resource according to the MSGn, the method further includes: and the terminal receives a first reference signal sent by the network side equipment on the reference signal resource, wherein the first reference signal is used for realizing at least one of radio resource management measurement, channel estimation, channel measurement, precise synchronization tracking and beam training. After the terminal receives the first reference signal sent by the network side device, the method may further include: the terminal sends a message fed back after receiving the first reference signal to the network side equipment, wherein the fed back message comprises one or more of the following information: and the terminal measures the result of the first reference signal and determines the information of the network side equipment to be accessed.
The present embodiment further provides a terminal, as shown in fig. 5, including a message sending module 50 and a message receiving module 60, where:
the message sending module 50 is configured to send a request message MSG1 to a network side device;
the message receiving module 60 is configured to receive the message MSGn sent by the network-side device after the message sending module sends the MSG1, and determine, according to the MSGn, a reference signal resource used by the network-side device to send a first reference signal.
Alternatively,
the MSG1 is an access request message sent when the terminal initiates uplink access; the access request message is an access request message sent when the terminal initially accesses or an access request message sent when the terminal actively applies for measurement after accessing a network;
the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the network side equipment to the terminal in the terminal uplink access process.
Alternatively,
the message receiving module receives the MSGn, and comprises: the message receiving module receives the MSGn by the MSGn resource used by the MSGn transmission or blindly detects the MSGn within the range of the MSGn resource used by the MSGn transmission.
Alternatively,
the message sending module sends the MSG1 to the network side device, including: the MSG1 is transmitted on the MSG1 resource used by the MSG1 transmission, or the MSG1 resource is selected in the MSG1 resource range used by the MSG1 transmission, and the MSG1 is transmitted on the selected MSG1 resource.
Alternatively,
the terminal further comprises: a resource allocation module, configured to allocate the reference signal resource, where the reference signal resource is a dedicated resource allocated in response to the terminal access or a common resource allocated for the terminal access.
Alternatively,
the message receiving module determines the reference signal resource according to the MSGn, and comprises the following steps: acquiring all parameters of the reference signal resource from the MSGn sent by the network side equipment; or determining all parameters of the reference signal resource according to the MSGn and an agreed rule; or determining a part of parameters of the reference signal resource according to the MGSn and an agreed rule, and acquiring another part of parameters of the reference signal resource from the MSGn; wherein the parameters of the reference signal resource include one or more of: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
Alternatively,
the message receiving module determines all or part of parameters of the reference signal resource according to the MSGn and an agreed rule, and comprises the following steps: and determining all or part of parameters of the reference signal resource according to the MSGn resource or the range of the MSGn resource used for transmitting the MSGn and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
Alternatively,
after the reference signal resource is determined according to the MSGn, the message is further used for receiving a first reference signal sent by the network side device on the reference signal resource, where the first reference signal is used for implementing at least one of radio resource management measurement, channel estimation, channel measurement, precise synchronization tracking, and beam training.
Alternatively,
the message sending module sends a message fed back after receiving the first reference signal to the network side equipment when the message receiving module receives the first reference signal sent by the network side equipment, wherein the fed back message comprises one or more of the following information: and the terminal measures the result of the first reference signal and determines the information of the network side equipment to be accessed.
Alternatively,
the network side equipment is a transmission node in a novel wireless access system, and the terminal is a terminal with the function of accessing the transmission node.
In the above embodiment, the network side device sends the first reference signal after receiving the access request of the terminal, so that a manner of responding to the sending by the terminal is realized, and before sending the first reference signal, the reference signal resource used by the first reference signal is indicated in the message sent to the terminal, which is convenient for flexible allocation of the reference signal resource, facilitates receiving of the reference signal, and avoids overhead and electric quantity required by the network side device to send the reference signal resource periodically.
The invention is further illustrated below by means of several examples of applications.
Example 1
In this example, the scenario that the terminal needs to initiate an initial access to send an access request message MSG1 and requires the network side base station or the transmission node to send the first reference signal that flexibly occupies the resource includes: when a terminal initially accesses a network to establish wireless connection and RRC connection is reestablished, the terminal is switched among transmission node clusters or between base stations; in the RRC _ CONNECTED state, when uplink data arrives and a measurement report needs to be reported or user data needs to be sent, the terminal uplink is in an "asynchronous" state.
In this example, the MSG1 resource used by the terminal to send the access request message MSG1 and the MSG2 resource used by the TP to send the access request response message MSG2 may be indicated in the Access Configuration (AC). One or more ACs make up one Access Configuration Set (ACs). The ACS may be sent by the macro base station or sent by a part of TPs in the TP cluster, and the terminal may determine the currently available AC from the received ACS through AC indication information (such as AC index) sent by the part of TPs in the cluster.
In this example, before the terminal receives the first reference signal, coarse synchronization with the system may be obtained by receiving other signals, such as DRS signals, AC indication information, and the like, and the basic time offset, frequency offset, or phase offset of the MSG1 transmitted uplink is controlled and adjusted within a certain range, which facilitates TP reception. The first reference signal transmitted by the network side device can be used for fine adjustment and tracking of time, frequency or phase. In this example, the first Reference Signal may also be used for Radio Resource Management (RRM), and the RRM measurement may be, for example, Reference Signal Receiving Power (RSRP) measurement, Reference Signal Receiving Quality (RSRQ) measurement, or the like. The first reference signal may also be used for channel estimation, channel measurement, and beam training functions. If the first reference signal is broadband, it is suitable for measuring RSRP, channel estimation, channel measurement, synchronous tracking, etc., and if the first reference signal is narrowband, it is suitable for beam training, achieving the purpose of precise beam alignment.
The reference signal resources may include one or more of frequency domain resources, time resources, code domain resources, and spatial domain resources, and in particular, may include one or more of the following parameters: such as reference signal pattern, frequency domain starting point, time starting point, bandwidth occupied by frequency domain, length occupied by time, specific location of RE, frequency domain interval, time interval, repetition period, antenna port, antenna precoding coefficient, optional codeword, and scrambling code information. Since the reference signal resources are indicated by the message, these resources are all flexible and variable.
In this example, the reference signal resource used for the first reference signal transmission is indicated by the access request response message MSG 2. The reference signal resource may be a display indication or an implicit indication, or may be a part of the display indication and another part of the implicit indication. The parameters indicating the filling of the reference signal resources as directly in MSG2 are displayed. The implicit indication is a resource parameter indirectly indicating the reference signal, for example, the reference signal may be set to be transmitted after a set time interval after the MSG1 resource, the time interval is set by the system, and the indication is not required in each MSG 2.
The method is completely different from the prior method for periodically transmitting the reference signal, because the first reference signal is transmitted according to the appointed resource as required according to the terminal access request, the reference signal resource can be released after the work of measurement and the like is finished, the first reference signal can not be periodically and continuously transmitted, the transmitting power of the network side equipment can be effectively saved, and the design principle taking the terminal as the center is realized.
In this example, after performing corresponding RRM measurement according to the received first reference signal, the terminal sends the measurement result and/or the TP selected after measurement to the TPs in the cluster through an uplink message, for example, sends a Primary transport node (Primary TP) number selected according to RSRP measurement.
In this example, the TP may periodically send the first reference signal on the reference signal resource within a specified maximum sending duration until receiving the uplink message fed back by the terminal or reaching the maximum sending duration. Or may be sent periodically after the trigger is sent.
In the signaling flow between the TP and the terminal in this example, as shown in fig. 6, the terminal receives AC indication information sent by the TP, or receives AC indication information and an ACs; after the terminal determines the current available AC, the terminal sends MSG1 on the resource indicated by the AC, wherein the MSG1 can carry the preamble of random access; after receiving the MSG1, the TP sends MSG2, and indicates the reference signal resource used by the first reference signal through MSG 2; then the TP sends a first reference signal on the reference signal resource; and the terminal carries out measurement after receiving the first reference signal, and feeds back a measurement result to the TP through the uplink message or the TP selected according to the measurement result.
Example two
In this example, the terminal only moves in a cluster, the downlink synchronization condition can be maintained, and when the terminal switches (handover) between base stations or TPs in the cluster, RRM measurement in the cluster may also be required, and at this time, the terminal may initiate access when applying for measurement actively according to an AC obtained and stored by initial synchronization access, and send an access request message MSG 1.
The signaling flow of this example is shown in fig. 7, and compared with the first example, the terminal does not need to receive AC indication information or ACs from the TP, and the sending and processing of other messages may be the same as the first example, and are not described again here. The first reference signal may also be used for one or more of RRM measurement, channel estimation, channel measurement, precise synchronization tracking, and beam training.
Example three
In this example, the uplink access procedure from the terminal to the TP is similar to the conventional initial random access procedure of LTE, as shown in fig. 8, except that the terminal acquires the AC indication information, ACs, and implements access request preamble transmission through the access request message MSG1, and implements random access request response through the access request response message MSG2, unlike the first and second examples, the TP does not indicate the reference signal resource of the first reference signal in the MSG2, but indicates the reference signal resource in the collision resolution message MSG4 after receiving the uplink message MSG3 sent by the terminal; then, the first reference signal is sent; and the terminal carries out measurement after receiving the first reference signal, and feeds back a measurement result to the TP through another uplink message or the TP selected according to the measurement result.
The MSG1-MSG4 of this example is similar to the MSG1-MSG4 defined in the LTE initial random access procedure, except that when the TP issues the collision resolution message MSG4, the reference signal resources used for the first reference signal transmission are also indicated explicitly or implicitly, and the first reference signal resources are then transmitted to the terminal. And after receiving the first reference signal, the terminal reports the measurement result or the selected TP. In this example, the role of the first reference signal and the indication manner of the reference signal resource may be the same as those in the first example, and are not described again.
The above-mentioned serial numbers of the embodiments of the present invention are only for convenience of description, and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (45)

1. A method of signal transmission, comprising:
the network side equipment receives a request message MSG1 sent by a terminal;
after receiving the MSG1, the network side equipment sends a message MSGn to a terminal, and indicates reference signal resources used by the network side equipment for sending a first reference signal in the MSGn;
and the network side equipment sends a first reference signal on the reference signal resource, wherein the first reference signal is used for realizing at least one of wireless resource management measurement, channel estimation, channel measurement, accurate synchronous tracking and beam training after being received by the terminal.
2. The method of claim 1, wherein:
the MSG1 is an access request message sent when the terminal initiates uplink access.
3. The method of claim 2, wherein:
the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the network side equipment to the terminal in the terminal uplink access process.
4. The method of claim 3, wherein:
the network side equipment sends the MSGn, and the method comprises the following steps: and the network side equipment receiving the MSG1 transmits the MSGn on the MSGn resource used for transmitting the MSGn or in the range of the MSGn resource.
5. The method of claim 4, wherein:
the network side equipment sends the MSGn, and the method comprises the following steps:
and when the network side equipment determines that the terminal has access to the network, the MSGn resource is preferentially used to transmit the MSGn in the range of the MSGn resource and the MSGn resource.
6. The method of claim 1, wherein:
the MSGn resources or the range of the MSGn resources used by the network side equipment in the same cluster for transmitting the MSGn are staggered, and the MSGn resources or the range of the MSGn resources are determined according to the following mode:
specified in an access configuration set ACS or other system information; or
Negotiating and determining through network side equipment in the same cluster; or
And negotiating and determining through the network side equipment in the same cluster and the network side equipment in the adjacent cluster.
7. The method of claim 1, wherein:
the MSG1 sent by the receiving terminal of the network side device includes: and the network side equipment receives the MSG1 on the MSG1 resource used by the MSG1 in the transmission process, or blindly detects the MSG1 in the range of the MSG1 resource used by the MSG1 in the transmission process.
8. The method of any of claims 1-7, wherein:
the reference signal resource is a dedicated resource allocated by the network side device in response to the terminal access, or a common resource allocated by the network side device for terminal access.
9. The method of any of claims 1-7, wherein:
the network side device indicates the reference signal resource in the MSGn, and the method comprises the following steps:
explicitly indicating in MSGn all parameters of the reference signal resource; or
Implicitly indicating in MSGn all parameters of the reference signal resource; or
Implicitly indicating a partial parameter of the reference signal resource in MSGn, explicitly indicating another partial parameter of the reference signal resource;
wherein the explicit indication indicates parameters of filling the reference signal resource in the MSGn, and the implicit indication indicates parameters of indirectly indicating the reference signal resource through the MSGn, and the parameters include one or more of the following: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
10. The method of claim 9, wherein:
the network side device implicitly indicates all or part of parameters of the reference signal resource in the MSGn, and the method comprises the following steps: the network side equipment indicates all or part of parameters of the reference signal resource through the MSGn resource or the range of the MSGn resource used by the MSGn transmission and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
11. The method of claim 1, wherein:
the network side device sends a first reference signal on the reference signal resource, and the method includes:
and the network side equipment sends the first reference signal on the reference signal resource within a set maximum sending time length in a set sending period until receiving a message fed back by the terminal after receiving the first reference signal or reaching the maximum sending time length.
12. The method of claim 11, wherein:
the message fed back by the terminal after receiving the first reference signal carries one or more of the following information: and the terminal measures the result of the first reference signal and determines the information of the network side equipment to be accessed.
13. The method of any of claims 1-7, 10-12, wherein:
the network side equipment is a transmission node in a novel wireless access system, and one or more transmission nodes form a transmission node cluster.
14. The method of claim 13, wherein:
the transmission node is in a dormant state before receiving MSG1 sent by a terminal, and the first reference signal comprises a Discovery Reference Signal (DRS); or
The transmission node periodically transmits the DRS before receiving the MSG1 transmitted by the terminal, and the first reference signal does not include the DRS.
15. A method of signal transmission, comprising:
the terminal sends a request message MSG1 to the network side equipment;
after the terminal sends the MSG1, receiving a message MSGn sent by the network side equipment, and determining a reference signal resource used by the network side equipment for sending a first reference signal according to the MSGn;
and the terminal receives a first reference signal sent by the network side equipment on the reference signal resource, wherein the first reference signal is used for realizing at least one of radio resource management measurement, channel estimation, channel measurement, precise synchronization tracking and beam training.
16. The method of claim 15, wherein:
the MSG1 is an access request message sent when the terminal initiates uplink access.
17. The method of claim 16, wherein:
the access request message is an access request message sent by the terminal during initial access; or an access request message sent when the terminal actively applies for measurement after accessing the network.
18. The method of claim 16, wherein:
the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the network side equipment to the terminal in the terminal uplink access process;
the terminal receives the MSGn and comprises the following steps: the terminal receives the MSGn by the MSGn resource used by the MSGn transmission or blindly detects the MSGn within the range of the MSGn resource used by the MSGn transmission.
19. The method of claim 15, wherein:
the terminal sends MSG1 to the network side device, including:
the terminal transmits the MSG1 on the MSG1 resource used by the MSG1 transmission, or selects the MSG1 resource in the MSG1 resource range used by the MSG1 transmission and transmits the MSG1 on the selected MSG1 resource.
20. The method of any of claims 15-19, wherein:
the reference signal resource is a dedicated resource allocated by the network side device in response to the terminal access, or a common resource allocated by the network side device for terminal access.
21. The method of any of claims 15-19, wherein:
the terminal determines the reference signal resource according to the MSGn, and the method comprises the following steps:
the terminal acquires all parameters of the reference signal resource from the MSGn sent by the network side equipment; or
The terminal determines all parameters of the reference signal resource according to the MSGn and an agreed rule; or
The terminal determines partial parameters of the reference signal resources according to the MSGn and an agreed rule, and acquires the other partial parameters of the reference signal resources from the MSGn;
wherein the parameters of the reference signal resource include one or more of: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
22. The method of claim 21, wherein:
the terminal determines all or part of parameters of the reference signal resource according to the MSGn and an agreed rule, and the method comprises the following steps:
and the terminal determines all or part of parameters of the reference signal resource according to the MSGn resource or the range of the MSGn resource used for transmitting the MSGn and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
23. The method of claim 15, wherein:
after the terminal receives the first reference signal sent by the network side device, the method further includes:
the terminal sends a message fed back after receiving the first reference signal to the network side equipment, wherein the fed back message comprises one or more of the following information: and the terminal measures the result of the first reference signal and determines the information of the network side equipment to be accessed.
24. The method of any of claims 15-19, 22, 23, wherein:
the network side equipment is a transmission node in a novel wireless access system, and the terminal is a terminal with the function of accessing the transmission node.
25. A network side device comprises a message receiving module and a message sending module, and is characterized in that:
the message receiving module is used for receiving a request message MSG1 sent by a terminal;
the message sending module is configured to send a message MSGn to a terminal after the message receiving module receives the MSG1, where the MSGn indicates a reference signal resource used by the network-side device to send a first reference signal;
after the message sending module sends the MSGn, the message sending module is further configured to send a first reference signal on the reference signal resource, where the first reference signal is used for a terminal to perform at least one of radio resource management measurement, channel estimation, channel measurement, precise synchronization tracking, and beam training after receiving the first reference signal.
26. The network-side device of claim 25, wherein:
the MSG1 is an access request message sent when the terminal initiates uplink access;
the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the message sending module to the terminal in the process of uplink access of the terminal.
27. The network-side device of claim 26, wherein:
the message sending module sends the MSGn, and comprises: the message sending module sends the MSGn on the MSGn resource used for sending the MSGn or in the range of the MSGn resource.
28. The network-side device of claim 27, wherein:
the message sending module sends the MSGn, and comprises: the message sending module sends the MSGn by preferentially using the MSGn resource in the range of the MSGn resource and the MSGn resource when the terminal has access to the network.
29. The network-side device of claim 25, wherein:
message sending modules of network side equipment in the same cluster send MSGn resources used by the MSGn to be staggered with each other, and the MSGn resources or the range of the MSGn resources are determined according to the following modes: specified in an access configuration set ACS or other system information; or the network side equipment in the same cluster negotiates and determines; or the network side equipment in the same cluster and the network side equipment in the adjacent cluster are determined through negotiation.
30. The network-side device of claim 25, wherein:
the message receiving module receives the MSG1 sent by the terminal, and comprises: the message receiving module receives the MSG1 on the MSG1 resource used by the MSG1 transmission or blindly detects the MSG1 in the range of the MSG1 resource used by the MSG1 transmission.
31. The network-side device of any one of claims 25-30, wherein:
the network side device further includes a resource allocation module, configured to allocate the reference signal resource, where the reference signal resource is a dedicated resource allocated in response to the terminal access, or a common resource allocated for the terminal access.
32. The network-side device of any one of claims 25-30, wherein:
the message sending module indicates the reference signal resource in the MSGn, including: explicitly indicating in MSGn all parameters of the reference signal resource; or implicitly indicating all parameters of the reference signal resource in MSGn; or implicitly indicating a partial parameter of the reference signal resource in the MSGn and explicitly indicating another partial parameter of the reference signal resource;
wherein the explicit indication indicates parameters of filling the reference signal resource in the MSGn, and the implicit indication indicates parameters of indirectly indicating the reference signal resource through the MSGn, and the parameters include one or more of the following: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
33. The network-side device of claim 32, wherein:
the message sending module implicitly indicates all or part of the parameters of the reference signal resource in the MSGn, and the method comprises the following steps: the message sending module indicates all or part of parameters of the reference signal resource through the MSGn resource or the range of the MSGn resource used by the MSGn sending and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
34. The network-side device of claim 25, wherein:
the message sending module sends a first reference signal on the reference signal resource, and includes: and sending the first reference signal on the reference signal resource within a set maximum sending time length in a set sending period until receiving a message fed back by the terminal after receiving the first reference signal or reaching the maximum sending time length.
35. The network-side device of any of claims 25-30, 33, 34, wherein:
the network side equipment is a transmission node in a novel wireless access system, and one or more transmission nodes form a transmission node cluster.
36. The network-side device of claim 35, wherein:
before a message receiving module in the transmission node receives MSG1 sent by a terminal, the transmission node is in a dormant state, and the first reference signal comprises a discovery reference signal DRS; or
And a message receiving module in the transmission node periodically transmits the DRS before receiving the MSG1 transmitted by the terminal, wherein the first reference signal does not include the DRS.
37. A terminal comprises a message sending module and a message receiving module, and is characterized in that:
the message sending module is used for sending a request message MSG1 to the network side equipment;
the message receiving module is configured to receive the message MSGn sent by the network-side device after the message sending module sends the MSG1, and determine, according to the MSGn, a reference signal resource used by the network-side device to send a first reference signal;
after the reference signal resource is determined according to the MSGn, the message is further used for receiving a first reference signal sent by the network side device on the reference signal resource, where the first reference signal is used for implementing at least one of radio resource management measurement, channel estimation, channel measurement, precise synchronization tracking, and beam training.
38. The terminal of claim 37, wherein:
the MSG1 is an access request message sent when the terminal initiates uplink access; the access request message is an access request message sent when the terminal initially accesses or an access request message sent when the terminal actively applies for measurement after accessing a network;
the MSGn is an access request response message MSG2 or a conflict resolution message MSG4 sent by the network side equipment to the terminal in the terminal uplink access process.
39. The terminal of claim 38, wherein:
the message receiving module receives the MSGn, and comprises: the message receiving module receives the MSGn by the MSGn resource used by the MSGn transmission or blindly detects the MSGn within the range of the MSGn resource used by the MSGn transmission.
40. The terminal of claim 37, wherein:
the message sending module sends the MSG1 to the network side device, including: the MSG1 is transmitted on the MSG1 resource used by the MSG1 transmission, or the MSG1 resource is selected in the MSG1 resource range used by the MSG1 transmission, and the MSG1 is transmitted on the selected MSG1 resource.
41. The terminal according to any of claims 37-40, characterized by:
the terminal further comprises: a resource allocation module, configured to allocate the reference signal resource, where the reference signal resource is a dedicated resource allocated in response to the terminal access or a common resource allocated for the terminal access.
42. The terminal according to any of claims 37-40, characterized by:
the message receiving module determines the reference signal resource according to the MSGn, and comprises the following steps: acquiring all parameters of the reference signal resource from the MSGn sent by the network side equipment; or
Determining all parameters of the reference signal resource according to the MSGn and an agreed rule; or
Determining a partial parameter of the reference signal resource according to the MSGn and an agreed rule, and acquiring another partial parameter of the reference signal resource from the MSGn;
wherein the parameters of the reference signal resource include one or more of: the method comprises the steps of a first reference signal pattern, a frequency domain starting point, a time starting point, a bandwidth occupied by a frequency domain, a length occupied by time, a resource element RE position, a frequency domain interval, a time interval, a repetition period, an antenna port, an antenna precoding coefficient, an optional code word and scrambling code information.
43. The terminal of claim 42, wherein:
the message receiving module determines all or part of parameters of the reference signal resource according to the MSGn and an agreed rule, and comprises the following steps: and determining all or part of parameters of the reference signal resource according to the MSGn resource or the range of the MSGn resource used for transmitting the MSGn and the preset position relation between the MSGn resource or the range of the MSGn resource and the reference signal resource.
44. The terminal of claim 37, wherein:
the message sending module sends a message fed back after receiving the first reference signal to the network side equipment when the message receiving module receives the first reference signal sent by the network side equipment, wherein the fed back message comprises one or more of the following information: and the terminal measures the result of the first reference signal and determines the information of the network side equipment to be accessed.
45. The terminal of any of claims 37-40, 43, 44, wherein:
the network side equipment is a transmission node in a novel wireless access system, and the terminal is a terminal with the function of accessing the transmission node.
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