CN115002928B - Communication system for enhancing random access - Google Patents
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- CN115002928B CN115002928B CN202210433497.0A CN202210433497A CN115002928B CN 115002928 B CN115002928 B CN 115002928B CN 202210433497 A CN202210433497 A CN 202210433497A CN 115002928 B CN115002928 B CN 115002928B
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- 238000013468 resource allocation Methods 0.000 claims abstract description 51
- 238000012790 confirmation Methods 0.000 claims abstract description 8
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- 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
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Abstract
The present disclosure describes a communication system for enhancing random access, comprising a terminal device and an access network device; the access network equipment generates a plurality of sending resources based on the first message, configures distance information and sends a plurality of second messages by the access network equipment, if the terminal equipment sends a third message according to the second message of a target obtained based on target route loss, the access network equipment generates a fourth message and sends the fourth message by the access network equipment according to the distance information corresponding to the sending resources of the third message, if the terminal equipment judges that the interference solution ID of the fourth message is equal to the third message and sends a confirmation message, the access network equipment allocates resources for receiving a fifth message according to the distance information of the terminal equipment, generates a resource allocation message and sends the resource allocation message by the access network equipment, and if the terminal equipment sends the fifth message, the access network equipment receives the fifth message to realize random access of the terminal equipment. Thus, the success rate of the random access of the terminal device can be improved.
Description
The application date of the application is 2021, 3 and 20, the application number is 202110298818.6, and the application is a divisional application of a patent application of terminal equipment for enhancing random access and access network equipment.
Technical Field
The present disclosure relates generally to the field of mobile communications, and more particularly to a communication system that enhances random access.
Background
A wireless communication network often includes one or more access nodes (e.g., base stations) and User Equipment (UE) needs to synchronize with the uplink of the wireless communication network via a random access procedure (Random Access Procedure) before uplink transmission can occur. There are a number of scenarios in wireless communication systems that may trigger a random access procedure, such as a scenario when a UE in an idle state attempts to transmit uplink data. At present, the random access procedure generally adopts the same processing scheme for all UEs, for example, in the random access procedure of the 5G fifth generation mobile communication technology (5 th generation mobile networks), the MSG3, the MSG4 and the MSG5 generally adopt the same power control mode and resource allocation strategy.
However, in a real wireless communication network, characteristics such as signal strengths of an edge UE and a center UE tend to be different due to a difference in distance between the UE and a base station. In this case, the same processing scheme is adopted to cause some problems. For example, when the center UE is closer to the base station, it generates a signal burst exceeding the linear range of the base station receiver, resulting in an uplink decoding error, while the edge UE has difficulty in ensuring uplink reception power even if it reaches the maximum transmission power, resulting in an increase in error rate. Thus, the success rate of random access is reduced.
Disclosure of Invention
The present disclosure has been made in view of the above-described conventional circumstances, and an object thereof is to provide a terminal device and an access network device for enhancing random access, which can improve the success rate of random access.
To this end, a first aspect of the present disclosure provides a terminal device for enhancing random access, the terminal device including a first processing unit and a first transceiver unit, the first processing unit generating a first message and sending the first message to the access network device, the first transceiver unit sending the first message to the access network device, if the access network device receives the first message and generates a plurality of second messages including distance information and resource allocation information corresponding to each transmission resource based on a plurality of transmission resources generated in advance and configured with distance information and the first message, the first transceiver unit transmitting the received plurality of second messages from the access network device to the first processing unit, the first processing unit calculating a target path loss and selecting a second message satisfying a preset requirement as a second message as a target from a plurality of second messages based on the target path loss, then generating a third message and sending the third message to the first transceiver unit, the first transceiver unit sending the third message to the access network device according to the resource allocation information in the second message of the target, wherein the first transceiver unit sending the first message as a preset message corresponding to the distance information in the second message of the target, and sending the second message as a distance information from the access network device, the first transceiver unit matching the distance information to the access network device and sending the second message as a fourth message from the access network device, the first processing unit judges whether the interference solution ID in the fourth message is equal to the third message, if the interference solution ID is equal to the third message, the first processing unit generates a confirmation message and sends the confirmation message to the first transceiver unit, the first transceiver unit sends the confirmation message to the access network device, if the access network device receives the confirmation message and allocates resources for receiving a fifth message according to the target distance information of the terminal device, and then sends a resource allocation message, the first transceiver unit transmits the received resource allocation message from the access network device to the first processing unit, the first processing unit generates the fifth message and sends the fifth message to the first transceiver unit, and the first transceiver unit sends the fifth message to the access network device to realize random access. In this case, it is possible for the access network device to obtain the distance information of the terminal device as early as possible and allocate corresponding resources based on the distance information. Therefore, the success rate of the random access of the terminal equipment can be improved, and the resources after the collision of the random access channel are increased.
In addition, in the terminal device related to the first aspect of the present disclosure, optionally, the access network device obtains a corresponding resource selection policy configured with resource allocation information based on the target distance information of the terminal device, and sends the fourth message and allocates a resource for receiving the fifth message based on the resource selection policy, where the resource allocation information of the resource selection policy includes at least one of a modulation and coding policy, a time domain allocation, and a frequency domain allocation. In this case, the access network device can transmit the fourth message and allocate resources for receiving the fifth message based on the distance information of the terminal device. Therefore, the success rate of the terminal equipment for receiving the fourth message can be improved, and the success rate of the access network equipment for receiving the fifth message can be increased.
In addition, in the terminal device according to the first aspect of the present disclosure, optionally, if the fourth message is sent based on the resource selection policy, the resource selection policy further includes a downlink power burst; and if the resource receiving the fifth message is allocated based on the resource selection policy, the resource selection policy further comprises transmission power adjustment. Therefore, the success rate of the terminal equipment for receiving the fourth message can be further improved, and the success rate of the access network equipment for receiving the fifth message can be increased.
The second aspect of the present disclosure provides an access network device for enhancing random access, the access network device including a second transceiver unit and a second processing unit, the second transceiver unit receiving a first message from a terminal device and transmitting the first message to the second processing unit, the second processing unit generating a plurality of second messages including distance information and resource allocation information corresponding to each transmission resource based on a plurality of transmission resources and the first message which are generated in advance and configured with distance information, the second transceiver unit transmitting the second message to the second transceiver unit, if the terminal device calculates a target path loss and selects a second message satisfying a preset requirement from the plurality of second messages as a second message of a target based on the target path loss, then the terminal device generating a third message and transmitting the third message according to resource allocation information in the second message of the target, the second transceiver unit transmitting the received third message from the terminal device to the second transceiver unit, wherein the second message is equal to the distance information in the range of the second message to the second message, and the second message is required to be transmitted to the terminal device, if the distance information is equal to the second message in the second message, the distance information is determined as a distance information between the second message and the terminal device, the second message is equal to the second message, and the second message is determined to the second message is transmitted to the second message in the range, and the second message is the second message, and the second transceiver unit receives the acknowledgement message from the terminal equipment and transmits the acknowledgement message to the second processing unit, the second processing unit allocates resources for receiving a fifth message according to the target distance information of the terminal equipment and transmits a resource allocation message to the second transceiver unit, and the second transceiver unit transmits the resource allocation message to the terminal equipment, and if the terminal equipment generates the fifth message and transmits the fifth message, the second transceiver unit receives the fifth message from the terminal equipment to realize random access of the terminal equipment. In this case, it is possible for the access network device to obtain the distance information of the terminal device as early as possible and allocate corresponding resources based on the distance information. Therefore, the success rate of the random access of the terminal equipment can be improved, and the resources after the collision of the random access channel are increased.
In addition, in the access network device according to the second aspect of the present disclosure, optionally, the second processing unit obtains a corresponding resource selection policy configured with resource allocation information based on the target distance information of the terminal device, and sends the fourth message and allocates a resource for receiving the fifth message based on the resource selection policy, where the resource allocation information of the resource selection policy includes at least one of a modulation and coding policy, a time domain allocation, and a frequency domain allocation. In this case, the access network device can transmit the fourth message and allocate resources for receiving the fifth message based on the distance information of the terminal device. Therefore, the success rate of the terminal equipment for receiving the fourth message can be improved, and the success rate of the access network equipment for receiving the fifth message can be increased.
In addition, in the access network device according to the second aspect of the present disclosure, optionally, if the fourth message is sent based on the resource selection policy, the resource selection policy further includes a downlink power burst; and if the resource receiving the fifth message is allocated based on the resource selection policy, the resource selection policy further comprises transmission power adjustment. Therefore, the success rate of the terminal equipment for receiving the fourth message can be further improved, and the success rate of the access network equipment for receiving the fifth message can be increased.
In addition, in the terminal device according to the first aspect of the present disclosure and the access network device according to the second aspect, optionally, the first message includes a preamble sequence, and the fourth message and the fifth message are scheduled by downlink control information.
In addition, in the terminal device according to the first aspect of the present disclosure and the access network device according to the second aspect, optionally, the second message is a RAR message and is scheduled by downlink control information, and the access network device uses reserved bits of the downlink control information to send the distance information. Thereby, compatibility can be maintained.
In addition, in the terminal device according to the first aspect of the present disclosure and the access network device according to the second aspect, optionally, the target path loss is obtained based on a reference signal transmission power of the access network device and a reference signal reception power of the terminal device. Thereby, the target route loss can be obtained to select the second message based on the target route loss.
In addition, in the terminal device according to the first aspect of the present disclosure and the access network device according to the second aspect of the present disclosure, a lower path loss bound and an upper path loss bound may be obtained based on the distance information, where the path loss range is a section corresponding to the lower path loss bound and the upper path loss bound.
According to the present disclosure, there are provided a terminal device and an access network device for enhancing random access, which are capable of improving a success rate of random access.
Drawings
Embodiments of the present disclosure will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram illustrating an application scenario of random access of a terminal device according to an example of the present disclosure.
Fig. 2 is a block diagram illustrating a communication system to which examples of the present disclosure relate.
Fig. 3 is a block diagram illustrating a terminal device enhancing random access to which examples of the present disclosure relate.
Fig. 4 is a block diagram illustrating an access network device that enhances random access in accordance with examples of the present disclosure.
Fig. 5 is a flow chart illustrating an enhanced random access method in accordance with examples of the present disclosure.
Fig. 6 is an interaction diagram illustrating an enhanced random access method according to an example of the present disclosure.
Detailed Description
Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same members are denoted by the same reference numerals, and overlapping description thereof is omitted. In addition, the drawings are schematic, and the ratio of the sizes of the components to each other, the shapes of the components, and the like may be different from actual ones. It should be noted that the terms "first," "second," "third," and "fourth," etc. in the description and claims of the present disclosure and in the above figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The present disclosure relates to a terminal device enhancing random access, an access network device enhancing random access, and a communication system. The terminal equipment for enhancing the random access, the access network equipment for enhancing the random access and the communication system can enable the access network equipment to acquire the distance information of the terminal equipment as soon as possible and allocate corresponding resources based on the distance information. Therefore, the success rate of the Random access of the terminal equipment can be improved, and resources after the Random access channel (Random ACCESS CHANNEL, RACH) is collided are increased. The communication system to which the present disclosure relates may include a terminal device that enhances random access and an access network device that enhances random access. The present disclosure is described in detail below with reference to the accompanying drawings. In addition, the application scenario described in the examples of the present disclosure is for more clearly explaining the technical solution of the present disclosure, and does not constitute a limitation on the technical solution provided by the present disclosure.
The present disclosure relates to a terminal device enhancing random access, an access network device enhancing random access and a communication system that can be used for random access of 5G.
Fig. 1 is a schematic diagram illustrating an application scenario of random access of a terminal device according to an example of the present disclosure. Fig. 2 is a block diagram illustrating a communication system to which examples of the present disclosure relate. In some examples, as shown in fig. 2, communication system 1 may include a terminal device 10 and an access network device 20. In some examples, as shown in fig. 1, the terminal device 10 and the access network device 20 may interact with each other by an enhanced random access method (described later) related to the present disclosure to synchronize the terminal device 10 with an uplink of the wireless communication network for uplink transmission. The enhanced random access method may be applied to the communication system 1.
In some examples, the terminal device 10 may be a smart phone, a notebook computer, a Personal computer (Personal Computer, PC), a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a Mobile internet device (Mobile INTERNET DEVICE, MID), or other various types of electronic devices. In some examples, access network device 20 may be a base station. In some examples, the base station may be a base station in GSM or CDMA (BTS, base Transceiver Station), a base station in WCDMA (NodeB), or an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B).
As described above, the communication system 1 may include the terminal device 10 and the access network device 20. Fig. 3 is a block diagram showing the terminal device 10 to which the example of the present disclosure relates. In some examples, as shown in fig. 3, the terminal device 10 may include a first transceiving unit 11 and a first processing unit 12. In some examples, the first transceiver unit 11 may be configured to receive messages sent by the access network device 20 and send messages to the access network device 20, and the first processing unit 12 may be configured to process messages sent by the access network device 20, i.e. the first processing unit 12 may be configured to process messages received by the first transceiver unit 11. Examples of the present disclosure are not limited thereto, and in other examples, the terminal device 10 may include any one or more units capable of implementing the corresponding functions of the first transceiver unit 11 and the first processing unit 12.
In some examples, the first processing unit 12 may generate and send a first message (MSG 1) to the first transceiving unit 11, and the first transceiving unit 11 may send the first message to the access network device 20. In some examples, the first message may include a Preamble sequence (Preamble).
In some examples, if access network device 20 receives the first message and generates a plurality of second messages (MSG 2), first transceiver unit 11 may transmit the received plurality of second messages from access network device 20 to first processing unit 12.
Additionally, in some examples, the second message may be a RAR (Random Access Response ) message scheduled by downlink control information (Download Control Information, DCI) such as DCI 1-0. In some examples, access network device 20 may utilize reserved bits of downlink control information to transmit distance information. Thereby, compatibility can be maintained.
In addition, in some examples, access network device 20 may pre-generate a plurality of transmission resources and configure distance information for each transmission resource, i.e., the plurality of transmission resources are configured with distance information. In some examples, the transmission resources may be in one-to-one correspondence with the distance information. In some examples, the terminal device 10 may transmit a third message (described later) using the transmission resource.
In addition, in some examples, distance intervals corresponding to respective transmission resources may be acquired based on the distance information. In some examples, the distance may be represented by a path loss. In this case, a lower path loss limit and an upper path loss limit may be obtained based on the distance information, and the distance section (may also be referred to as a path loss range) may be a section corresponding to the lower path loss limit and the upper path loss limit. Thus, the range of the path loss corresponding to the transmission resource can be determined by the distance information. In some examples, the distance information may include a lower path loss bound and an upper path loss bound. In some examples, if the lower path loss bound and the upper path loss bound are both 0, it may indicate that access network device 20 is not performing enhanced random access processing. In other examples, the distance information may include a path loss start value and a path loss length.
In addition, in some examples, the plurality of second messages may be generated based on the plurality of transmission resources and the first message, and each of the second messages may include distance information and resource allocation information corresponding to each of the transmission resources. In some examples, each second message may correspond to each transmission resource, respectively, i.e., the second messages may correspond to the transmission resources one-to-one. Thus, a plurality of second messages each corresponding to a different transmission resource and including distance information can be generated. In this case, a plurality of second messages are generated based on the first message to provide a plurality of transmission resources. Thereby, resources after collision of the Random access channel (Random ACCESS CHANNEL, RACH) can be increased.
In some examples, the resource allocation information may include a modulation and coding scheme (Modulation Coding Scheme, MCS), a time domain allocation, and a frequency domain allocation. In some examples, the resource allocation information may also include downlink power bursts, which may be used for messaging by the access network device 20 to the terminal device 10, or transmit power adjustments, which may be used for messaging by the terminal device 10 to the access network device 20. In some examples, the second message may include an uplink scheduling grant (UL grant) that may include resource allocation information for indicating one transmission resource.
In some examples, the first processing unit 12 may calculate the target route loss and select, as the target second message, a second message satisfying a preset requirement from the plurality of second messages based on the target route loss. In some examples, the first processing unit 12 may generate and send a third message (MSG 3) to the first transceiving unit 11. In some examples, the first transceiver unit 11 may send the third message to the access network device 20 according to the resource allocation information in the second message of the target. In this case, the subsequent access network device 20 may obtain the distance information of the terminal device 10 based on the transmission resources used by the terminal device 10 to transmit the third message.
In addition, in some examples, the target path loss may be obtained based on the reference signal transmit power of access network device 20 and the reference signal receive power of terminal device 10. Thereby, the target route loss can be obtained to select the second message based on the target route loss. In some examples, the target path loss may be a difference between the reference signal transmit power of access network device 20 and the reference signal receive power of terminal device 10. In addition, in some examples, the reference signal transmit power may be transmitted by the base station to the terminal device 10 through system information (System information block, SIB). In addition, in some examples, the reference signal received power may be obtained by measurement by the terminal device 10. In addition, in some examples, the preset requirement may be that the target path loss is within a path loss range corresponding to the distance information of the second message. It should be noted here that in other examples, there may be a second message sent by the access network device in the old version, where no distance information is present in the second message. In this case, the first processing unit 12 may send a third message to the old version of the access network device based on the second message.
Specifically, the first processing unit 12 may obtain the second message in response to the first message and determine whether there is distance information, such as a lower path loss boundary and an upper path loss boundary, in the second message, if so, determine whether the target path loss is within the path loss range corresponding to the distance information, if so, generate the third message and send the third message through the corresponding sending resource obtained by the first transceiver unit 11 according to the resource allocation information in the second message, and if not, continue to monitor. In some examples, if distance information does not exist in the second message, a third message is sent according to the resource allocation information in the second message. Thus, the access network device of the old version can be compatible.
In some examples, if access network device 20 receives the third message and generates a fourth message (MSG 4), and then sends the fourth message, first transceiver unit 11 may transmit the fourth message received from access network device 20 to first processing unit 12. In some examples, access network device 20 may send the fourth message according to distance information corresponding to the transmission resource that matches the third message. In some examples, the transmission resource that matches the third message may be a transmission resource used by the terminal device 10 to transmit the third message. In this case, the distance information of the terminal device 10 can be obtained through the transmission resource that transmits the third message, thereby determining the distance of the terminal device 10 as early as possible. Thereby, the appropriate resource can be selected to transmit the fourth message. In some examples, the fourth message may be scheduled by downlink control information, e.g., DCI 1-0.
In addition, in some examples, access network device 20 may obtain a corresponding resource selection policy based on the target distance information of terminal device 10 and send a fourth message based on the resource selection policy. In some examples, the resource selection policy may be configured with resource allocation information. In some examples, the resource allocation information of the resource selection policy may include at least one of a modulation and coding policy, a time domain allocation, and a frequency domain allocation. In this case, the fourth message can be transmitted based on the distance information of the terminal device 10. Thereby, the success rate of the terminal device 10 receiving the fourth message can be improved. In some examples, the distance of the terminal device 10 may be inversely related to the interference corresponding to the time domain allocation and the interference corresponding to the frequency domain allocation. That is, the farther the terminal device 10 is, the smaller the interference corresponding to the time domain and the frequency domain allocated by the access network device 20. In some examples, the distance of the terminal device 10 may be inversely related to the modulation and coding strategy. I.e. the farther away the terminal device 10 is, the smaller the modulation and coding strategy employed.
Additionally, in some examples, if access network device 20 sends the fourth message based on a resource selection policy, the resource selection policy may also include a downlink power burst (burst). That is, the access network device 20 transmits the fourth message with higher downlink power at the designated transmission resource. Thereby, the success rate of the terminal device 10 receiving the fourth message can be further improved. In some examples, the distance of the terminal device 10 may be positively correlated with the downlink power burst. I.e. the further away the terminal device 10 is, the higher the downlink power burst is.
In addition, in some examples, the distance information corresponding to the transmission resource that matches the third message may be regarded as the target distance information of the terminal device 10. In some examples, access network device 20 may store target distance information for terminal device 10. Thus, it is possible to facilitate the subsequent access network device 20 to employ different resource allocation policies based on the target distance information. Additionally, in some examples, the fourth message may include an interference resolution ID for feeding back dispute resolution information. In some examples, the third message may be used as an interference resolution ID.
In some examples, the first processing unit 12 may determine whether the interference solution ID in the fourth message is equal to the third message, and if several interference solution IDs are equal to the third message, the first processing unit 12 may generate and send an acknowledgement message (ACK) to the first transceiver unit 11, and the first transceiver unit 11 sends the acknowledgement message to the access network device 20.
In some examples, if access network device 20 receives the acknowledgement message and allocates resources for receiving the fifth message (MSG 5) and then transmits the resource allocation message, first transceiving unit 11 may transmit the received resource allocation message from access network device 20 to first processing unit 12. In this case, the terminal device 10 can obtain the resource allocation message to indicate the resource for transmitting the fifth message (corresponding to the resource for receiving the fifth message for the access network device 20). In some examples, after receiving the acknowledgement message, access network device 20 may allocate resources for receiving the fifth message according to the target distance information of terminal device 10. Thereby, the success rate of the access network device 20 to receive the fifth message can be increased. In some examples, if access network device 20 does not receive the fifth message, resources for receiving the fifth message may be reallocated and a new resource allocation message may be sent according to the target distance information of terminal device 10.
In addition, in some examples, access network device 20 may obtain a corresponding resource selection policy based on the target distance information of terminal device 10 and allocate resources for receiving the fifth message based on the resource selection policy. Thereby, the success rate of the access network device 20 receiving the fifth message can be improved. In some examples, the resource selection policy may further include a transmit power adjustment if resources to receive the fifth message are allocated based on the resource selection policy. Thereby, the success rate of the access network device 20 receiving the fifth message can be further improved. In some examples, the distance of the terminal device 10 may be positively correlated with the transmit power adjustment. That is, the farther the terminal device 10 is, the greater the transmission power adjustment is.
In some examples, the first processing unit 12 may generate and send a fifth message to the first transceiver unit 11, and the first transceiver unit 11 may send the fifth message to the access network device 20 to enable random access. In some examples, the fifth message may be scheduled by downlink control information, e.g., DCI 1-0.
The terminal equipment 10 of the present disclosure can enable the access network equipment 20 to obtain the distance information of the terminal equipment 10 as early as possible and allocate corresponding resources based on the distance information. Thereby, the success rate of the random access of the terminal device 10 can be improved, in particular, the success rate of the random access of the edge terminal device 10 is enhanced, and the resources after the collision of the random access channel are increased.
Fig. 4 is a block diagram illustrating an access network device 20 to which examples of the present disclosure relate. In some examples, as shown in fig. 4, the access network device 20 may include a second transceiver unit 21 and a second processing unit 22. In some examples, the second transceiver unit 21 may be configured to receive a message sent by the terminal device 10 and send the message to the terminal device 10, and the second processing unit 22 may be configured to process the message sent by the terminal device 10, that is, the second processing unit 22 may be configured to process the message received by the second transceiver unit 21. Examples of the present disclosure are not limited thereto, and in other examples, the access network device 20 may include any one or more units capable of implementing the corresponding functions of the second transceiver unit 21 and the second processing unit 22.
In some examples, the second transceiving unit 21 may receive the first message from the terminal device 10 and send the first message to the second processing unit 22. In some examples, the second processing unit 22 may generate and send a plurality of second messages to the second transceiving unit 21, and the second transceiving unit 21 may send the second messages to the terminal device 10. In some examples, the first message may include a Preamble sequence (Preamble).
In addition, in some examples, the second processing unit 22 may generate a plurality of transmission resources in advance and configure distance information of the respective transmission resources, that is, the plurality of transmission resources are configured with the distance information. In some examples, the second processing unit 22 may generate second messages respectively corresponding to the respective transmission resources based on the plurality of transmission resources and the first messages, and the respective second messages may include distance information and resource allocation information corresponding to the respective transmission resources. In addition, in some examples, distance intervals corresponding to respective transmission resources may be acquired based on the distance information. In some examples, the distance may be represented by a path loss. In this case, a lower path loss limit and an upper path loss limit may be obtained based on the distance information, and the distance section (may also be referred to as a path loss range) may be a section corresponding to the lower path loss limit and the upper path loss limit. Thus, the range of the path loss corresponding to the transmission resource can be determined by the distance information. The related description may refer to the description of the access network device 20 involved in the terminal device 10 to generate and transmit the second message and the transmission resources described above.
Additionally, in some examples, the second message may be a RAR (Random Access Response ) message scheduled by downlink control information (Download Control Information, DCI) such as DCI 1-0. In some examples, the second transceiving unit 21 may transmit the distance information using reserved bits of the downlink control information. Thereby, compatibility can be maintained.
In some examples, if the terminal device 10 calculates the target path loss and selects a second message satisfying the preset requirement as a target second message from the plurality of second messages based on the target path loss, and then generates a third message and transmits the third message, the second transceiving unit 21 may transmit the received third message from the terminal device 10 to the second processing unit 22. In some examples, the terminal device 10 may send the third message according to the resource allocation information in the second message of the target. In this case, the subsequent access network device 20 may obtain the distance information of the terminal device 10 based on the transmission resource used for transmitting the third message. In addition, in some examples, the target path loss may be obtained based on the reference signal transmit power of access network device 20 and the reference signal receive power of terminal device 10. Thereby, the target route loss can be obtained to select the second message based on the target route loss. In addition, in some examples, the preset requirement may be that the target path loss is within a path loss range corresponding to the distance information of the second message. The related description may refer to the description of the generation and transmission of the third message referred to in the above description of the terminal device 10.
In some examples, the second processing unit 22 may generate and send a fourth message to the second transceiving unit 21, and the second transceiving unit 21 may send the fourth message to the terminal device 10. In some examples, the second transceiving unit 21 may transmit the fourth message to the terminal device 10 according to distance information corresponding to transmission resources matched to the third message. Thus, the distance of the terminal device 10 can be determined as early as possible. In some examples, the second transceiving unit 21 may take the distance information as target distance information of the terminal device 10. In some examples, the fourth message may be scheduled by downlink control information, e.g., DCI 1-0. The related description may refer to the description of the generation and transmission of the fourth message involved in the above description of the terminal device 10.
In addition, in some examples, the second processing unit 22 may obtain a corresponding resource selection policy based on the target distance information of the terminal device 10 and send a fourth message based on the resource selection policy. In some examples, the resource selection policy may be configured with resource allocation information. In some examples, the resource allocation information of the resource selection policy may include at least one of a modulation and coding policy, a time domain allocation, and a frequency domain allocation. In this case, the fourth message can be transmitted based on the distance information of the terminal device 10. Thereby, the success rate of the terminal device 10 receiving the fourth message can be improved. Additionally, in some examples, the resource selection policy may also include a downlink power burst (burst) if the second processing unit 22 sends the fourth message based on the resource selection policy. That is, the second processing unit 22 transmits the fourth message with higher downlink power at the designated transmission resource. Thereby, the success rate of the terminal device 10 receiving the fourth message can be further improved. The relevant description may refer to the description above in the terminal device 10 concerning the resource selection policy.
In some examples, if the terminal device 10 determines whether the interference solution ID in the fourth message is equal to the third message, and generates an acknowledgement message and transmits the acknowledgement message in case the interference solution ID is equal to the third message, the second transceiving unit 21 may receive the acknowledgement message from the terminal device 10 and transmit the acknowledgement message to the second processing unit 22. The relevant description may refer to the description of the generation and transmission of acknowledgement messages involved in the above description of the terminal device 10.
In some examples, the second processing unit 22 may allocate resources for receiving the fifth message and transmit a resource allocation message to the second transceiving unit 21. In some examples, the second transceiving unit 21 may send a resource allocation message to the terminal device 10. That is, resources for receiving the fifth message are allocated and the terminal device 10 is notified. Thereby, the terminal device 10 can obtain the resource allocation message. In some examples, the resource allocation message includes resource allocation information for transmission resources used to transmit the fifth message. In some examples, the resource allocation message may be scheduled by the downlink control information.
In some examples, the second processing unit 22 may allocate resources for receiving the fifth message according to the target distance information of the terminal device 10. Thereby, the success rate of the access network device 20 to receive the fifth message can be increased. In addition, in some examples, access network device 20 may obtain a corresponding resource selection policy based on the target distance information of terminal device 10 and allocate resources for receiving the fifth message based on the resource selection policy. Thereby, the success rate of the access network device 20 receiving the fifth message can be improved. In some examples, the resource selection policy may further include a transmit power adjustment if resources to receive the fifth message are allocated based on the resource selection policy. Thereby, the success rate of the access network device 20 receiving the fifth message can be further improved. The related description may refer to the description of generating and transmitting the resource allocation message referred to in the above description of the terminal device 10.
In some examples, if the terminal device 10 generates the fifth message and transmits the fifth message, the second transceiving unit 21 may receive the fifth message from the terminal device 10 to enable random access of the terminal device 10. In some examples, the fifth message may be scheduled by downlink control information, e.g., DCI 1-0.
The access network device 20 using the present disclosure can obtain the distance information of the terminal device 10 as early as possible and allocate corresponding resources based on the distance information. Thereby, the success rate of the random access of the terminal device 10 can be improved, in particular, the success rate of the random access of the edge terminal device 10 is enhanced, and the resources after the collision of the random access channel are increased.
As described above, the interaction between a terminal device 10 and an access network device 20 may be performed by an enhanced random access method, and specific steps may be specifically described with reference to fig. 5. Fig. 5 is a flow chart illustrating an enhanced random access method in accordance with examples of the present disclosure. Fig. 6 is an interaction diagram illustrating an enhanced random access method according to an example of the present disclosure.
In some examples, as shown in fig. 5, the enhanced random access method may include the terminal device 10 transmitting a first message (step S100). In step S100, the terminal device 10 may generate a first message and transmit the first message. The relevant description may refer to the description of the generation and transmission of the first message referred to in the above description of the terminal device 10.
In some examples, as shown in fig. 5, the enhanced random access method may include the access network device 20 generating a plurality of second messages including different resource information and transmitting the second messages (step S110). In step S110, access network device 20 may receive the first message and generate a plurality of second messages. In some examples, access network device 20 may pre-generate a plurality of transmission resources and configure distance information for each transmission resource. In some examples, access network device 20 may generate a plurality of second messages respectively corresponding to respective transmission resources based on the plurality of transmission resources and the first message, and each of the second messages may include distance information and resource allocation information corresponding to each transmission resource. The related description may refer to the description of the access network device 20 involved in the terminal device 10 to generate and transmit the second message and the transmission resources described above.
In some examples, as shown in fig. 5, the enhanced random access method may include the terminal device 10 selecting a target second message from the plurality of second messages and transmitting a third message based on the target second message (step S120). In step S120, the terminal device 10 may calculate the target route loss and select a second message satisfying a preset requirement as a target second message from the plurality of second messages based on the target route loss, and then the terminal device 10 generates a third message and transmits the third message. In some examples, the terminal device 10 may send the third message according to the resource allocation information in the second message of the target. In some examples, the preset requirement may be that the target path loss is within a path loss range corresponding to the distance information of the second message. The related description may refer to the description of the generation and transmission of the third message referred to in the above description of the terminal device 10.
In some examples, as shown in fig. 5, the enhanced random access method may include the access network device 20 obtaining distance information of the terminal device 10 from the third message and transmitting a fourth message based on the distance information (step S130). In step S130, access network device 20 may receive the third message and generate a fourth message, which in some examples, access network device 20 may transmit according to distance information corresponding to the transmission resources that match the third message. In some examples, access network device 20 may use distance information corresponding to the transmission resource that matches the third message as the target distance information for terminal device 10. The related description may refer to the description of the generation and transmission of the fourth message involved in the above description of the terminal device 10.
In some examples, as shown in fig. 5, the enhanced random access method may include the terminal device 10 judging the interference resolution ID and transmitting an acknowledgement message (step S140). In step S140, the terminal device 10 may determine whether the interference solution ID in the fourth message is equal to the third message, and in the case where the interference solution ID is equal to the third message, generate an acknowledgement message and transmit the acknowledgement message. The relevant description may refer to the description of the generation and transmission of acknowledgement messages involved in the above description of the terminal device 10.
In some examples, as shown in fig. 5, the enhanced random access method may include the access network device 20 allocating resources for receiving the fifth message according to the distance information corresponding to the terminal device 10 and transmitting the resource allocation message (step S150). As described above, the access network device 20 may regard distance information corresponding to the transmission resource matched with the third message as target distance information of the terminal device 10, and in step S150, the access network device 20 may receive the acknowledgement message and allocate a resource for receiving the fifth message, and then transmit the resource allocation message. In some examples, access network device 20 may allocate resources for receiving the fifth message according to the target distance information of terminal device 10. The related description may refer to the description of generating and transmitting the resource allocation message referred to in the above description of the terminal device 10.
In some examples, as shown in fig. 5, the enhanced random access method may include the terminal device 10 transmitting a fifth message to enable random access (step S160). In step S160, the terminal device 10 may generate a fifth message and transmit the fifth message to enable random access of the terminal device 10.
In some examples, the process of interaction between the terminal device 10 and the access network device 20 by enhancing the random access method may be seen in fig. 6.
In the present disclosure, the access network device 20 is enabled to obtain the distance information of the terminal device 10 as early as possible and allocate corresponding resources based on the distance information by the enhanced random access method as referred to above. Thereby, the success rate of the random access of the terminal device 10 can be improved, in particular, the success rate of the random access of the edge terminal device 10 is enhanced, and the resources after the collision of the random access channel are increased.
In the present disclosure, the enhanced random access method described above may be applied to, for example, the communication system 1 shown in fig. 1. The communication system 1 may comprise a terminal device 10 and an access network device 20 (see fig. 1). In this case, the enhanced random access method related to the present disclosure may be applied to the terminal device 10 of the communication system 1, or the enhanced random access method may be applied to the access network device 20 of the communication system 1. In other words, the enhanced random access method to which the present disclosure relates may be an enhanced random access method applied to the terminal device 10 or an enhanced random access method applied to the access network device 20.
In some examples, all or part of the steps in enhancing random access methods may be accomplished by a program (instructions) that may be stored in a computer readable memory (storage medium), which may include: flash disk, read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
While the disclosure has been described in detail in connection with the drawings and embodiments, it should be understood that the foregoing description is not intended to limit the disclosure in any way. Modifications and variations of the present disclosure may be made as desired by those skilled in the art without departing from the true spirit and scope of the disclosure, and such modifications and variations fall within the scope of the disclosure.
Claims (9)
1. A communication system for enhancing random access, comprising a terminal device having random access and an access network device, the terminal device generating a first message and transmitting the first message to the access network device, the access network device receiving the first message and generating a plurality of second messages including distance information and resource allocation information corresponding to respective transmission resources based on a plurality of transmission resources previously generated and configured with distance information and the first message,
The terminal equipment receives a plurality of second messages from the access network equipment, calculates target path loss, selects a second message meeting preset requirements from the plurality of second messages as a second message of a target based on the target path loss, then generates a third message, wherein the preset requirements are that the target path loss is in a path loss range corresponding to the distance information of the second message,
The terminal device sends the third message to the access network device according to the resource allocation information in the second message of the target, the access network device receives the third message and generates a fourth message, then sends the fourth message according to the distance information corresponding to the sending resource matched with the third message and takes the distance information corresponding to the sending resource matched with the third message as the target distance information of the terminal device,
The terminal equipment receives a fourth message from the access network equipment, the terminal equipment judges whether the interference solution ID in the fourth message is equal to the third message, if the interference solution ID is equal to the third message, the terminal equipment generates a confirmation message and sends the confirmation message to the access network equipment, the access network equipment receives the confirmation message and allocates resources for receiving a fifth message according to the target distance information of the terminal equipment, then sends a resource allocation message, the terminal equipment receives the resource allocation message from the access network equipment,
And the terminal equipment generates the fifth message and sends the fifth message to the access network equipment to realize random access.
2. The communication system of claim 1, wherein,
The second message is a random access response message and is scheduled by downlink control information, and the access network equipment sends the distance information by using reserved bits of the downlink control information.
3. The communication system of claim 1, wherein,
The target path loss is the difference between the reference signal sending power of the access network equipment and the reference signal receiving power of the terminal equipment.
4. The communication system of claim 1, wherein,
The access network device obtains a corresponding resource selection strategy configured with resource allocation information based on the target distance information of the terminal device, and sends the fourth message and allocates resources for receiving the fifth message based on the resource selection strategy, wherein the resource allocation information of the resource selection strategy comprises at least one of modulation and coding strategy, time domain allocation and frequency domain allocation.
5. The communication system of claim 4, wherein,
And if the access network equipment transmits the fourth message based on the resource selection strategy, the resource selection strategy comprises downlink power burst, and the access network equipment transmits the fourth message by adopting higher downlink power under the appointed transmission resource.
6. The communication system of claim 4, wherein,
And if the resource receiving the fifth message is allocated based on the resource selection policy, the resource selection policy further comprises transmission power adjustment.
7. The communication system of claim 1, wherein,
And the fifth message is scheduled by the downlink control information.
8. The communication system of claim 1, wherein,
The terminal equipment is a smart phone, a notebook computer, a personal digital assistant and a mobile internet device.
9. The communication system of claim 1, wherein,
The access network device is a base station, which is a base station in GSM, CDMA, WCDMA or an evolved base station in LTE.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123467A (en) * | 2006-08-07 | 2008-02-13 | 大唐移动通信设备有限公司 | A method and device for enhancing random access |
| EP2966920A4 (en) * | 2013-04-08 | 2016-03-16 | Huawei Tech Co Ltd | Method for sending and receiving random access preamble, and corresponding device |
| EP3944713A1 (en) * | 2014-01-24 | 2022-01-26 | Huawei Technologies Co., Ltd. | Random access method and apparatus |
| US10477590B2 (en) * | 2016-09-14 | 2019-11-12 | Samsung Electronics Co., Ltd. | Apparatus and method for random access in a wireless communication systems |
| CN108307413B (en) * | 2016-09-30 | 2023-06-30 | 华为技术有限公司 | Access method, terminal equipment and base station |
| JP6888115B2 (en) * | 2017-04-01 | 2021-06-16 | 深▲セン▼前▲海▼▲達▼▲闥▼▲雲▼端智能科技有限公司Ｃｌｏｕｄｍｉｎｄｓ （Ｓｈｅｎｚｈｅｎ） Ｒｏｂｏｔｉｃｓ Ｓｙｓｔｅｍｓ Ｃｏ．， Ｌｔｄ． | Random access method and equipment |
| CN109121222B (en) * | 2017-06-23 | 2021-08-13 | 华为技术有限公司 | Communication method and communication device |
| CN109275187B (en) * | 2017-07-17 | 2021-01-08 | 维沃移动通信有限公司 | Random access method, terminal and computer readable storage medium |
| US10999846B2 (en) * | 2018-09-28 | 2021-05-04 | Nokia Technologies Oy | Resource allocation in random access procedure |
| CN110972250B (en) * | 2018-09-28 | 2021-06-22 | 华为技术有限公司 | Power control method and device |
| US11039399B2 (en) * | 2019-02-05 | 2021-06-15 | Qualcomm Incorporated | Open loop power control for two-step random access |
| CN113439463A (en) * | 2019-02-14 | 2021-09-24 | 松下电器（美国）知识产权公司 | Terminal and communication method |
| CN113396631A (en) * | 2019-02-14 | 2021-09-14 | 索尼集团公司 | Communication device, infrastructure equipment and method |
| CN111818549A (en) * | 2019-04-11 | 2020-10-23 | 普天信息技术有限公司 | Random access response message transmission method and device |
| CN113632561B (en) * | 2019-08-19 | 2023-10-10 | Oppo广东移动通信有限公司 | Resource allocation method, terminal equipment and network equipment |
-
2021
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Non-Patent Citations (2)
| Title |
|---|
| 5G随机接入增强技术;沈霞;移动通信;20200415;第44卷(第04期);全文 * |
| Estimation and Adaptation for Bursty LTE Random Access;Guan-Yu Lin;IEEE Transactions on Vehicular Technology;20150402;第65卷(第4期);全文 * |
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