WO2017173883A1

WO2017173883A1 - Method and device for ra-rnti configuration

Info

Publication number: WO2017173883A1
Application number: PCT/CN2017/073174
Authority: WO
Inventors: 邹伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-04-07
Filing date: 2017-02-09
Publication date: 2017-10-12
Also published as: CN107277897A

Abstract

Provided in the present invention are a method and device for RA-RNTI configuration. The method comprises: a base station transmits configuration information to a user equipment, where the configuration information is used for configuring at least two different RA-RNTIs for all random access preambles in one same PRACH, the user equipment selects an RA-RNTI on the basis of the random access preambles transmitted on the PRACH and receives RAR information on the basis of the selected RA-RNTI. Employment of the described technical solution solves the problem in the prior art in which a user equipment must parse RAR information comprising multiple RAR units before acquiring an RAR unit that is required by self and resulting in the user equipment consuming a large amount of power, thus achieving the effect of reducing the power consumption of the user equipment and extending battery life.

Description

RA-RNTI configuration method and device

Technical field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for configuring a Random Access Radio Network Temporary Identity (RA-RNTI).

Background technique

M2M (Machine to Machine) communication is an important topic of the fifth generation of mobile communication technology (5G, 5th Generation), and an important application field for wireless communication in the future. In the M2M project, 3GPP proposed a research sub-project of the NB-IoT (Narow Band Internet of Things) system for the low-cost and low-throughput characteristics of the terminal. The goal is to build a long-term and long-term band in the 200 kHz band. A similar system (LTE, Long-Term Evolution) provides low-throughput wireless communication services for low-cost terminals. The downlink still uses the Orthogonal Frequency Division Multiple Access (OFDMA) technology, and the uplink uses the Single-Carrier Frequency Division Multiple Access (SC-FDMA) technology, and reuses or simplifies the LTE system as much as possible. The existing functional modules. The subcarrier width increases the subcarrier width of 3.75 KHz in the uplink in addition to the subcarrier width of 15 KHz in the LTE system to further enhance the coverage capability of the uplink of the machine terminal. Currently, relevant technical standards are being studied within the 3GPP International Organization for Standardization.

In a conventional LTE system, different random access channels are distinguished by using different Random Access Radio Network Temporary Identity (RA-RNTI). The user terminal uses the RA-RNTI corresponding to the physical random access channel (PRACH) of the random access preamble to perform a random access response (RAR, Random Access Response) in the subsequent random access response window. Reception. In this process, the RA-RNTI used by the user equipment is based on the first subframe number (0 to 9) where the PRACH of the random access preamble is located, and the index of the PRACH in the frequency domain of the random access preamble is transmitted (0 to 5) Calculated. It can be seen that the traditional RA-RNTI calculation method is calculated by using the subframe number of the first subframe occupied by the PARCH that transmits the random access preamble and the frequency index number of the PARCH as parameters, and supports a maximum of 10 ms frame range. Identification of a Physical Random Access Channel (PRACH).

A different RAR message is often included in a RAR message, and each RAR unit includes a random access preamble identity (RAPID). Indicates the target user of the RAR unit.

In summary, in the conventional LTE system, after transmitting a random access preamble, the user must detect all PDCCHs in a prescribed RAR window. And if a certain DCI information is successfully decoded by using the RA-RNTI corresponding to the PRACH in a certain PDCCH, all RAR units in the RAR message need to be received according to the DCI information. Finally, I find my RAR unit based on the RAPID of the RAR unit. In this process, user equipment consumes a lot of energy. Since the NB IoT system expects the life of the user-side battery to be more than 10 years, the power-saving design is particularly important.

For the related art, the user equipment must parse the RAR information including multiple RAR units to obtain the RAR unit that is needed by itself, and the user equipment consumes a large amount of power. No effective solution has been proposed.

Summary of the invention

The embodiment of the invention provides a method and a device for configuring an RA-RNTI to solve at least the above problems.

According to an embodiment of the present invention, a method for configuring an RA-RNTI is provided, where the base station sends configuration information to a user equipment, where the configuration information is used to configure at least two for all random access preambles in the same PRACH. The different RA-RNTIs, the user equipment selects the RA-RNTI according to the random access preamble sent on the PRACH, and receives the RAR information based on the selected RA-RNTI.

Further, the configuration information is further used to allocate different RA-RNTIs for all random access preambles on the same PRACH.

Further, the base station sends the RAR information on the physical downlink control information PDCCH.

Further, the configuration information is sent in at least one of the following manners: carried in a system message broadcast message transmission; by specifying a standard protocol convention.

According to another embodiment of the present invention, a method for configuring an RA-RNTI is provided, including: receiving, by a user equipment, configuration information sent by a base station, where the configuration information is used for all the same physical random access channel PRACH A random access preamble is configured to configure at least two different RA-RNTIs; the user equipment selects an RA-RNTI according to a random access preamble sent on the PRACH, and receives RAR information based on the selected RA-RNTI.

Further, the method further includes: if the user equipment does not receive the RAR information within a specified time, the user equipment receives a backoff indication that the base station transmits in at least one of the following manners (BI, Back off Indication) BI information: The BI information is transmitted through the system message module SIB; the BI information is transmitted through the physical downlink control channel PDCCH.

Further, transmitting the BI information by using the PDCCH includes: transmitting the BI information by using a common search space in the PDCCH.

Further, the BI information is sent in a PDCCH, and the BI information is scrambled by a designated cell radio network temporary identifier C-RNTI.

Further, the method further includes: after the user equipment determines that the current random access procedure fails, determining whether to start the next round of random access procedure according to at least the following conditions: whether the timer time arrives; the reference signal receiving power The change of RSRP; the load status of the current PRACH channel.

Further, the duration of the timer is determined by using at least one of the following parameters: configuration information sent by the base station; and the number of times the user equipment fails to access the random access.

According to another embodiment of the present invention, a RA-RNTI configuration apparatus is further provided, which is applied to a base station, and includes:

a sending module, configured to send configuration information to the user equipment, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel, where the user equipment is configured according to The random access preamble transmitted on the PRACH selects the RA-RNTI and receives the RAR information based on the selected RA-RNTI.

According to another aspect of the present invention, a device for configuring an RA-RNTI is provided, which is applied to a user equipment, and includes: a first receiving module, configured to receive configuration information sent by a base station, where the configuration information is used for the same All the random access preambles in the physical random access channel PRACH are configured with at least two different RA-RNTIs; the selecting module is configured to select the RA-RNTI according to the random access preamble sent on the PRACH; the second receiving module is set to RAR information is received based on the selected RA-RNTI.

In an embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing the implementation of the RA-RNTI configuration method in the foregoing embodiment.

According to the embodiment of the present invention, all the random access preambles in the same PRACH are used to configure at least two different RA-RNTI technologies, that is, for random access preambles of different RA-RNTIs, the user equipment only needs to receive its own RAR. The information does not need to receive the RAR information of other user equipments. The above technical means is adopted. In the related art, the user equipment must parse the RAR information including multiple RAR units to obtain the RAR unit required by the user equipment, thereby causing the user equipment to consume power. A large amount of problems, thereby achieving the effect of reducing the power consumption of the user equipment and extending the battery life.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method for configuring an RA-RNTI according to an embodiment of the present invention;

2 is another flowchart of a method for configuring an RA-RNTI according to an embodiment of the present invention;

FIG. 3 is a structural block diagram of an apparatus for configuring an RA-RNTI according to an embodiment of the present invention; FIG.

4 is a block diagram showing another structure of an apparatus for configuring an RA-RNTI according to an embodiment of the present invention;

FIG. 5 is a block diagram showing another structure of an apparatus for configuring an RA-RNTI according to an embodiment of the present invention; FIG.

FIG. 6 is a signaling flowchart of indicating an RA-RNTI configuration method based on a random access RA preamble according to a preferred embodiment of the present invention;

FIG. 7 is a schematic diagram of a manner in which a user receives an indication of an RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention; Process diagram

FIG. 8 is a signaling flowchart of successfully performing random access using an RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention; FIG.

FIG. 9 is a signaling flowchart of a base station failing to detect an RA preamble when performing random access using a RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

The method embodiments provided by the embodiments of the present application may be implemented in a mobile terminal, a computer terminal, and a base station, but are not limited to the foregoing devices. Taking a base station as an example, a base station may include one or more processors (processors may include, but are not limited to, processing devices such as microprocessor MCUs or programmable logic devices FPGAs), memory for storing data, and Transmission device for communication functions. It will be understood by those skilled in the art that the above description of the structure is merely illustrative and does not limit the structure of the above electronic device. For example, the base station may also include more or fewer components than those described above, or have a different configuration than that described above.

The memory can be used to store software programs and modules of the application software, such as the program instructions/modules corresponding to the configuration method of the RA-RNTI in the embodiment of the present invention, and the processor executes various programs by running software programs and modules stored in the memory. Functional application and data processing, that is, the above method is implemented. The memory can include high speed random access memory and can also include non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, the memory can further include a memory remotely located relative to the processor. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device is for receiving or transmitting data via a network. In one example, the transmission device includes a Network Interface Controller (NIC). In one example, the transmission device can be a Radio Frequency (RF) module for communicating with the Internet wirelessly.

Embodiment 1

In this embodiment, a method for configuring an RA-RNTI is provided. FIG. 1 is a flowchart of a method for configuring an RA-RNTI according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102: The base station sends configuration information to the user equipment, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the same PRACH, where the user equipment randomly sends according to the PRACH. The incoming preamble selects the RA-RNTI and receives RAR information based on the selected RA-RNTI.

The at least two different RA-RNTIs are configured for all the random access preambles in the same PRACH by the execution of the step S102 between the base station and the user equipment, that is, for the random access preamble of different RA-RNTIs, the user equipment only needs to receive The RAR information of the RAR information does not need to receive the RAR information of other user equipments. The above technical means is adopted. In the related art, the user equipment must parse the RAR information including multiple RAR units to obtain the RAR unit required by the user equipment, thereby causing the user to The problem of large power consumption of the device, thereby achieving the effect of reducing the power consumption of the user equipment and prolonging the battery life.

Embodiment 2

In order to improve the foregoing technical solution, the user equipment side is taken as an example, and a RA-RNTI configuration method is also provided in this embodiment, and FIG. 2 is another flowchart of the RA-RNTI configuration method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202: The user equipment receives configuration information sent by the base station, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the same PRACH.

Step S204: The user equipment selects an RA-RNTI according to a random access preamble sent on the PRACH, and receives RAR information based on the selected RA-RNTI.

The user equipment receives configuration information sent by the base station, and the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the same PRACH, by performing the steps S202 to S204 between the base station and the user equipment. That is, for the random access preamble of different RA-RNTIs, the user equipment only needs to receive its own RAR information, and does not need to receive the RAR information of other user equipments. The above technical means is used to solve the related art, and the user equipment must parse out more The RAR information of the RAR unit can obtain the RAR unit that is required by the RAR unit, and the user equipment consumes a large amount of power. The technical solution of the embodiment of the present invention reduces the user's consumption by optimizing the configuration and process of the random access. Electricity to support longer battery life.

It can be seen from the foregoing steps S102 and S202 that the base station configures at least two different RA-RNTIs for all random access preambles, that is, the base station specifies one and the same RA-RNTI for one or more random access preambles. Adjusting the number of random access preambles sharing the same RA-RNTI can control the proportion of valid messages in the RAR message. In this case, although the indication of the RAPID is still required in each RAR unit, the number of bits occupied by it can be greatly reduced.

For the foregoing technical solution, the RA-RNTI configured by the base station for the random access preamble may include multiple configuration manners. The following describes the foregoing configuration manner, and how the user equipment selects the RA-RNTI according to the random access preamble sent on the PRACH. .

When a PRACH includes five random access preambles, the first two random access preambles may be configured to correspond to the first RA-RNTI, and the last three random access preambles correspond to the second RA-RNTI, and the base station may notify the user equipment of the corresponding relationship. Specifically, the base station may notify the user equipment by using a broadcast message or a specified signaling manner, and after receiving the random access preamble, the user equipment acquires the RA-RNTI corresponding to the received random access preamble according to the corresponding relationship sent by the base station.

In the embodiment of the present invention, there are multiple configurations, for example, the first two random access preambles of the five random access preambles correspond to the first RA-RNTI, and the third and fourth corresponding second RA-RNTIs. The fifth corresponds to the third RA-RNTI, the base The station sends the corresponding relationship to the user equipment by using a broadcast message or a specified signaling manner, and may also be the first three RA-RNTIs corresponding to the first three of the seven random access preambles, and the second RA-RNTI corresponding to the second four base stations. The corresponding relationship is sent to the user equipment by means of a broadcast message or a specified signaling manner. It is to be noted that the above-mentioned examples are only used to explain the technical solutions of the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

In order to better achieve the technical effect of reducing power consumption, the foregoing configuration information is used to allocate different RA-RNTIs for all random access preambles on the same PRACH, that is, all random access preambles on the PRACH are allocated two. Two different RA-RNTIs can save power.

Certainly, the RAR information of different users may be completely distinguished because the RA-RNTIs of the random access preambles are different. Each RAR information only includes RAR units required by the user, and the RAR information may not include the RAPID to continue indication. The RAR unit, that is, the number of bits of the RAR information is also greatly reduced. Therefore, the base station can transmit the RAR information on the PDCCH. In this case, the RAR message can be directly added by using the RA-RNTI corresponding to the transmitted random access preamble. Disturb.

For the manner of sending the foregoing configuration information, two implementation manners are provided in the optional example of the embodiment of the present invention: carrying a message broadcast message in the system; and specifying a standard protocol.

Optionally, the method further includes: if the user equipment does not receive the RAR information within the specified time, the user equipment receives the back-off indication BI information that is sent by the base station by using at least one of the following manners: sending the BI information by using the system message module SIB; The physical downlink control channel PDCCH transmits BI information, wherein the BI information may be transmitted through a common search space in the PDCCH. In an optional example, BI information is transmitted in the PDCCH, the BI information temporarily identifying the C-RNTI through the designated cell radio network Perform scrambling code.

After the user equipment side performs the maximum number of random access retransmissions specified by the base station and cannot receive the corresponding RAR information, the user equipment determines that the current random access procedure fails. Here, the user equipment side can also perform the following technologies. Solution: judging whether to start the next round of random access procedure according to at least the following conditions: whether the timer time is reached; the change of the reference signal receiving power RSRP; the load status of the current PRACH channel, and further, the duration of the foregoing timer passes at least One of the following parameters determines the configuration information sent by the base station; the number of times the user equipment fails to access the random access.

In summary, the technical solution proposed by the embodiment of the present invention is: a RA-NTI configuration method based on a random access preamble, that is, a base station specifies different RA-RNTI values for different random access preambles transmitted in the same PRACH, and the user equipment After transmitting a random access preamble, subsequent RAR reception is performed with the corresponding RA-RNTI. In this way, the RAR messages of different user equipments can be completely separated. A user equipment only needs to receive its own RAR message without receiving RAR messages of other user equipments. Moreover, since each RAR message contains only one RAR unit, the RAPID can be omitted.

A further improvement of the foregoing technical solution in the embodiment of the present invention is that the base station can indicate in the system broadcast whether the RA-RNTI configuration method is a traditional PRACH-based processing flow or a random access preamble-based processing flow, and the user equipment receives the Indicates a specific random access operation. If the RA-RNTI configuration method indication is based on a random access preamble, the subsequent RA operation is performed according to the method of the embodiment of the present invention. Otherwise, follow-up RA operations are performed in the traditional way.

After the user equipment sends the random access preamble, if the RAR message is not received, the base station's backoff indication BI needs to be received. Generally, a user equipment that transmits a random access preamble in the same PRACH needs to receive and use the same BI indication for subsequent backoff operations. To this end, the embodiments of the present invention also propose the following methods for BI information transmission:

1) Put the BI information into the SIB. If the user equipment cannot receive its own RAR message in the RAR window, it directly uses the BI value in the SIB to roll back and then resumes the next random access preamble.

2) The base station can transmit BI information in a common search space in the PDCCH. The information may also be combined in other public information. The base station may specify a specific RNTI (for example, may be referred to as BI-RNTI) for each PRACH to transmit BI information in the PDCCH. In an optional example, the BI information may be Located in the last PDCCH in the RAR window.

After the user equipment performs the maximum number of random access retransmissions specified by the base station and cannot receive the corresponding RAR information at all times, the user equipment determines that the random access fails. The user equipment can start a timer and restart a new round of random access procedure after the timer expires, that is, reselect the PRACH, and perform random access preamble transmission and retransmission. Optionally, the duration of the timer may be determined according to information sent by the base station; the duration of the timer may be configured according to a standard protocol; the duration configured by the timer may be performed by the user equipment according to the number of random access failures. Dynamic configuration.

Optionally, the user equipment may continue to monitor or periodically monitor the received RSRP change of the base station signal, and determine whether to restart a new round of random access procedure according to the change of the base station signal RSRP, that is, reselect the PRACH, and The transmission and retransmission of the random access preamble is performed. Of course, the user equipment can also decide whether to restart a new round of random access procedure according to the load status of the current channel.

The foregoing technical solution of the embodiment of the present invention includes: a RA-RNTI configuration based on a random access preamble and a corresponding BI notification method. Since the user equipment only needs to receive its own RAR unit without receiving the RAR unit of other user equipments using the same PRACH, power consumption can be reduced and battery life can be prolonged. Secondly, the base station can reduce the need to transmit information without performing an indication of the RAPID for the RAR unit, which further reduces power consumption. Finally, the embodiment of the present invention optimizes the BI indication method to accommodate the proposed random access.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In this embodiment, an apparatus for configuring an RA-RNTI is also provided, which is applied to a base station, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

Embodiment 3

FIG. 3 is a structural block diagram of a configuration apparatus of an RA-RNTI according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes:

The sending module 30 is configured to send configuration information to the user equipment, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel, where the user equipment The RA-RNTI is selected according to the random access preamble transmitted on the PRACH, and the RAR information is received based on the selected RA-RNTI.

At least two different RA-RNTIs are configured for all random access preambles in the same PRACH by the execution of the sending module 30, that is, for random access preambles of different RA-RNTIs, the user equipment only needs to receive its own RAR information. The RAR information of the other user equipments is not required to be received, and the foregoing technical means is adopted. In the related art, the user equipment must parse the RAR information including multiple RAR units to obtain the RAR unit that is needed by the user equipment, thereby causing the user equipment to consume a large amount of power. The big problem, in turn, achieves the effect of reducing the power consumption of the user equipment and prolonging the battery life.

The configuration information in the sending module 30 is further used to allocate different RA-RNTIs for all random access preambles on the same PRACH.

In this embodiment, an apparatus for configuring an RA-RNTI is further provided, which is applied to a user equipment, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

Embodiment 4

FIG. 4 is another structural block diagram of an apparatus for configuring an RA-RNTI according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes:

The first receiving module 40 is configured to receive configuration information sent by the base station, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel;

The selecting module 42 is configured to select the RA-RNTI according to the random access preamble sent on the PRACH;

The second receiving module 44 is configured to receive RAR information based on the selected RA-RNTI.

The function of the foregoing module is used to receive configuration information sent by the base station, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the same PRACH, that is, random access preambles for different RA-RNTIs. The user equipment only needs to receive its own RAR information, and does not need to receive the RAR information of other user equipments. The above technical means is adopted to solve the related art, the user equipment must parse the RAR information including multiple RAR units to obtain the self-requirement. The RAR unit in turn leads to a problem that the user equipment consumes a large amount of power. That is, the technical solution of the embodiment of the present invention reduces the power consumption of the user as much as possible by optimizing the configuration and process of the random access to support a longer battery life.

The configuration information of the first receiving module 40 is further used for all random access preambles on the same PRACH. With different RA-RNTIs, the configuration information is sent in at least one of the following ways: carried in the system message broadcast message transmission; by specifying standard protocol conventions.

Embodiment 5

FIG. 5 is a block diagram showing another configuration of an apparatus for configuring an RA-RNTI according to an embodiment of the present invention. As shown in FIG. 5, the method further includes: a third receiving module 46, configured to not receive RAR information in the user equipment within a specified time. The user equipment receives the BI transmitted by the base station in at least one of the following manners: sending the BI information through the system message module SIB; and transmitting the BI information through the physical downlink control channel PDCCH.

The device further includes: a determining module 48, configured to: after the user equipment determines that the current random access procedure fails, determine whether to start the next round of random access procedure according to at least the following conditions: whether the timer time arrives; the reference signal receiving power RSRP The change of the current PRACH channel load state. In an optional example, the duration of the timer is determined by at least one of the following parameters: configuration information sent by the base station; and the number of random access failures of the user equipment.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

The above technical solutions are explained below in conjunction with the preferred embodiments, but are not intended to limit the embodiments of the present invention.

Embodiment 6

FIG. 6 is a signaling flowchart of indicating an RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention. As shown in FIG. 6, the implementation process includes the following steps:

Step S602: The base station indicates, by using a system broadcast message, an RA-RNTI configuration method based on the RA access preamble. Optionally, the indication may be a unified indication for all PRACHs; the indication may specifically indicate that the RA-RNTI configuration method based on the RA access preamble is adopted in one or several PRACHs.

The foregoing step S602 may further include specific RA-RNTI configuration information, that is, the base station informs the user equipment of the correspondence between the random access preamble and the RA-RNTI through the system broadcast information, and may be that one or more random access preambles correspond to the same RA. - RNTI, or all random access preambles may correspond to different RA-RNTIs; optionally, RA-RNTI configuration information may also be pre-agreed through a standard protocol, and no additional system broadcast notification is required at this time. The RA-RNTI configuration method may also inform the user equipment through RRC signaling.

Step S604: After receiving the indication, the user performs a subsequent random access procedure according to the indicated method.

FIG. 7 is a process diagram of a process after a user receives an indication of an RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention. As shown in FIG. 7, the implementation process includes the following steps:

Step S702: The user receives a system broadcast message related to the RA-RNTI configuration method based on the RA access preamble.

Step S704: The user determines whether an indication of the RA-RNTI configuration method based on the RA access preamble is received. If the indication is received, the RA-RNTI configuration method of the RA access preamble is selected to receive the RAR message according to the RA-RNTI configuration method of the RA access preamble; otherwise, the RA is calculated according to the PRACH location of the legacy LTE system. The RNTI value is used to receive the RAR message.

Step S706: If the indication is not received, the conventional RAACH-based RA-RNTI calculation method is used to perform the subsequent RA process.

Step S708: If receiving the indication, continue to receive the specific RA-RNTI configuration information based on the RA access preamble. Alternatively, the information can be agreed upon through a standard protocol. Then follow the received configuration instructions and related configuration information for subsequent RA procedures.

FIG. 8 is a signaling flowchart of successfully performing random access by using an RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention. As shown in FIG. 8, the implementation process includes the following steps:

Step S802: The base station sends a random access related configuration, including deployment information of each PRACH.

Step S804: The base station sends an RA-RANTI configuration method indication based on the RA preamble. Optionally, the base station sends the RA-RANTI configuration information based on the RA preamble; the RA-RANTI configuration information based on the RA preamble may be pre-agreed through a standard protocol; The RA-RANTI configuration method indication may include RA-RANTI configuration information, where the RA-RANTI configuration information includes a configuration relationship between a random access preamble and an RA-RANTI, where one or more random access preambles correspond to the same RA. - RNTI, or all random access preambles may correspond to different RA-RNTIs.

Step S806: The user selects one PRACH and one RA preamble, and sends the RA preamble in the selected PRACH.

Step S808: The user selects the RA-RNTI according to the transmitted RA preamble, and uses the RA-RNTI to perform subsequent RAR reception.

Step S810: The base station sends a separate RAR message for the RA preamble detected in each PRACH.

Step S812: The base station and the user continue the subsequent RA process according to the conventional method.

FIG. 9 is a signaling flowchart of a base station failing to detect an RA preamble when performing random access using a RA-RNTI configuration method based on an RA access preamble according to a preferred embodiment of the present invention. As shown in FIG. 9, the implementation process includes the following steps:

Step S902: The base station sends a random access related configuration, including deployment information of each PRACH.

Step S904: The base station sends an RA-RANTI configuration method indication based on the RA preamble. Optionally, the base station sends the RA-RANTI configuration information based on the RA preamble; the RA-RANTI configuration information based on the RA preamble may be pre-agreed through a standard protocol; The RA-RANTI configuration method indication may include RA-RANTI configuration information, where the RA-RANTI configuration information includes a configuration relationship between a random access preamble and an RA-RANTI, where one or more random access preambles correspond to the same RA. - RNTI, or all random access preambles may correspond to different RA-RNTIs.

Step S906: The user selects one PRACH and one RA preamble, and sends the RA preamble in the selected PRACH.

Step S908: The user selects the RA-RNTI according to the transmitted RA preamble, and uses the RA-RNTI to perform subsequent RAR. Reception. In addition to the transmitted RA preamble, the RA-RNTI selection may also be selected in consideration of other factors, such as the location of the PRACH channel, including the subframe position and/or the frequency domain location.

Step S910: The base station sends a separate BI message. When the user does not detect the RAR message scrambled using the selected RA-RNTI within the agreed RAR window, the user performs the reception of the aforementioned BI message. Optionally, the base station can send a separate BI message in the RAR window. At this time, the user may first receive the BI message, but only when the user does not detect the RAR message scrambled using the selected RA-RNTI within the agreed RAR window.

Step S912: The user performs a rollback operation according to the indication of the BI message. Then restart a new round of random access process.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1. The base station sends configuration information to the user equipment, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the same PRACH, and the user equipment selects according to the random access preamble sent on the PRACH. RA-RNTI, and receives RAR information based on the selected RA-RNTI.

S1, the user equipment receives the configuration information sent by the base station, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel;

S2. The user equipment selects an RA-RNTI according to a random access preamble sent on the PRACH, and receives RAR information based on the selected RA-RNTI.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

Optionally, in this embodiment, the processor performs the configuration process of the foregoing RA-RNTI according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, etc. made within the spirit and principles of the present invention The same substitutions, improvements, and the like are intended to be included in the scope of the present invention.

Industrial applicability

The foregoing technical solutions provided by the embodiments of the present invention may be applied to the RA-RNTI configuration process, using all random access preambles in the same PRACH, and configuring at least two different RA-RNTI technologies, that is, different RA-RNTIs. The random access preamble, the user equipment only needs to receive its own RAR information, and does not need to receive the RAR information of other user equipments. The above technical means is used to solve the related art, the user equipment must parse the RAR information including multiple RAR units. In order to obtain the RAR unit that is needed by itself, the user equipment consumes a large amount of power, thereby reducing the power consumption of the user equipment and prolonging the battery life.

Claims

A method for configuring a random access radio network temporary identifier RA-RNTI includes:

The base station sends configuration information to the user equipment, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel, and the user equipment is randomly connected according to the PRACH. The incoming preamble selects the RA-RNTI and receives random access response RAR information based on the selected RA-RNTI.
The method according to claim 1, wherein the configuration information is further configured to allocate different RA-RNTIs for all random access preambles on the same PRACH.
The method of claim 1, wherein the base station transmits the RAR information on a physical downlink control information PDCCH.
The method of claim 1, wherein the configuration information is sent in at least one of the following ways: carried in a system message broadcast message transmission; by specifying a standard protocol convention.
A method for configuring a random access radio network temporary identifier RA-RNTI includes:

The user equipment receives the configuration information sent by the base station, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel;

The user equipment selects an RA-RNTI according to a random access preamble sent on the PRACH, and receives RAR information based on the selected RA-RNTI.
The method according to claim 5, wherein the configuration information is further configured to allocate different RA-RNTIs for all random access preambles on the same PRACH.
The method of claim 5, wherein the configuration information is sent in at least one of the following ways: carried in a system message broadcast message transmission; by specifying a standard protocol convention.
The method of claim 5 wherein the method further comprises:

If the user equipment does not receive the RAR information within a specified time, the user equipment receives the back-off indication BI information that is sent by the base station in at least one of the following manners: sending the BI information by using the system message module SIB; The BI information is transmitted through the physical downlink control channel PDCCH.
The method of claim 8, wherein transmitting the BI information through the PDCCH comprises transmitting the BI information through a common search space in the PDCCH.
The method of claim 8, wherein the BI information is transmitted in a PDCCH, the BI information being scrambled by a designated cell radio network temporary identification C-RNTI.
The method of claim 5 wherein the method further comprises:

After the user equipment determines that the current random access procedure fails, whether to start the next round of random access procedure according to at least the following conditions: whether the timer time arrives; the change of the reference signal receiving power RSRP; The load status of the pre-PRACH channel.
The method according to claim 11, wherein the duration of the timer is determined by at least one of the following parameters: configuration information sent by the base station; and the number of times the user equipment fails to access the random access.
A device for randomly configuring a radio network temporary identifier RA-RNTI, which is applied to a base station, and includes:

a sending module, configured to send configuration information to the user equipment, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel, where the user equipment is configured according to The random access preamble transmitted on the PRACH selects the RA-RNTI and receives the RAR information based on the selected RA-RNTI.
A device for configuring a random access wireless network temporary identifier RA-RNTI, which is applied to user equipment, and includes:

The first receiving module is configured to receive configuration information sent by the base station, where the configuration information is used to configure at least two different RA-RNTIs for all random access preambles in the PRACH of the same physical random access channel;

Selecting a module, configured to select an RA-RNTI according to a random access preamble sent on the PRACH;

The second receiving module is configured to receive the RAR information based on the selected RA-RNTI.
A computer storage medium storing execution instructions for performing the random access wireless network of any one of claims 1 to 4, or any one of claims 5-12 Temporarily identifies the configuration method of the RA-RNTI.