CN111465099A - Uplink access sharing method, configuration signaling and equipment - Google Patents

Abstract

The application discloses an uplink access sharing method, configuration signaling and equipment. An uplink access sharing method is used for a random access sequence of a terminal device to belong to a set of a first random access sequence; the first random access sequence is generated by at least one root sequence through cyclic shift under the condition of a first step length value; the random access sequence for the relay device belongs to a set of second random access sequences; the second random access sequence is generated by cyclic shift of the at least one root sequence under the condition of a second step value; the second step size value is greater than the first step size value. The uplink access configuration signaling comprises an identifier for indicating the first step value and/or the second step value. The application also provides a device, which receives the configuration signaling, and obtains a first random access sequence and a second random access sequence by circularly shifting at least one root sequence by using the first step value and the second step value; a random access sequence for a terminal or relay is determined. The method and the device solve the problem that the terminal and the relay device share the random access resource.

Description

An uplink access sharing method, configuration signaling and equipment

technical field

The present application relates to the field of mobile communication technologies, and in particular, to an uplink access sharing method, configuration signaling, and equipment.

Background technique

When both the relay device and the terminal device exist in the cell, both of them need to access the base station. If the same random access resources are configured, the configuration of random access parameters is restricted. For example, due to the high power and capability of the relay device, when it is located outside the cell radius of the main base station, it needs to try to access the main base station, then the main base station will configure random access parameters for the terminal. Matching with the relay device, the GP and CP in the sent preamble format will be large to meet the access of the relay device, or the value of the cyclic shift is large, thereby reducing the number of available cyclic shifts, so that It is unreasonable to access terminals within the radius of the cell. However, if the network configures independent random access resources for relay devices and terminal devices, signaling overhead will be greatly increased, and it is not conducive to the sharing of random access resources and affects the access capacity.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an uplink access sharing method, configuration signaling, and equipment, to solve the problem that a terminal and a relay device share random access resources.

An uplink access sharing method, comprising the following steps: a random access sequence used for terminal equipment belongs to a set of first random access sequences; the first random access sequence is composed of at least one root sequence in a first random access sequence It is generated by cyclic shift under the condition of step size; the random access sequence used for the relay device belongs to the set of second random access sequences; the second random access sequence is composed of the at least one root sequence Generated by cyclic shift under the condition of the second step value; the second step value is greater than the first step value.

Preferably, the second step value is a multiple of the first step value.

Preferably, the set of the second random access sequence includes part or all of the second random access sequence.

Preferably, in the set of first random access sequences, a first random access sequence that is the same as any of the second random access sequences is excluded.

Preferably, in any embodiment of the present application, the total number of random sequences included in the first random sequence set and the second random sequence set is 64.

An embodiment of the present application further provides uplink access configuration signaling, which is used in the method described in any embodiment of the present application, where the configuration signaling includes a value for indicating the first step size and or the second step size value 's identification.

An embodiment of the present application further provides a device for use in the method described in any embodiment of the present application, where the device is configured to receive configuration signaling, where the configuration signaling includes a value used to indicate the second step value. identification; cyclically shift at least one root sequence with the second step value to obtain the second random access sequence; determine all or part of the second random access sequence as the second random access sequence A collection of incoming sequences.

Preferably, the device is configured to receive configuration signaling, and the configuration signaling includes an identifier used to indicate the first-step length value; the at least one root sequence is cyclically shifted by the first-step length value , obtain the first machine access sequence; exclude the part identical to the second random access sequence from all the first random access sequences, and determine the set as the first random access sequence.

Further preferably, the random access sequence sent by the device belongs to the set of the first random access sequence or the set of the second random access sequence.

The embodiment of the present application further proposes a device that sends the configuration signaling, receives the random access sequence, and determines that the random access sequence belongs to the set of the first random access sequence or the second random access sequence. A collection of incoming sequences.

The above-mentioned at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

The method proposed in this patent allows the relay device and the terminal device to share the same random access resource, and the advantage is that the resource utilization of random access can be fully utilized.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

1 is a schematic diagram of a cell including a relay device and a terminal device;

2 is a flowchart of an embodiment of a method for sharing an uplink access channel according to the present invention;

3 is a schematic diagram of a set of random access sequences when the second step length is a multiple of the first step length;

FIG. 4 is a schematic diagram of a set of second random access sequences including part of the second random access sequence.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a cell including a relay device and a terminal device. A relay device 61 and a terminal device 62 exist in the cell at the same time, and both can access the base station 60 . The relay equipment and the terminal equipment each send random access sequences, and the base station equipment sends out random access responses after identification.

The generation formula of the random access sequence x _{u, v} (n) is as follows, where the base sequence is x _u (i), C _v is the cyclic shift, and L _RA is the length of the sequence.

x _u,v (n)=x _u ((n+C _v )mod L _RA )

When the length of L _RA is 139 and the step value of cyclic shift N _cs =10, the number of cyclic shifts v is 139/10 rounded down to 13, and the value of C _v is 0, 10, 20, ..., 120, with one root sequence, 13 random access sequences are generated. To generate 64 random access sequences, a total of 5 root sequences are required.

It should be noted that the selected cyclic shift value is related to the cell radius. Suppose there are two terminals, UE1 is at the edge of the cell, UE2 is closer to the eNB, UE1 uses a cyclic shift value of 0, and UE2 uses a cyclic shift value of N _cs . From the point of view of the eNB, due to the existence of transmission delay, the cyclic shift value of UE1 is not 0 but other value X, as long as the value X is less than Ncs, the value of the autocorrelation between X and _Ncs is 0, so that the eNB will be able to distinguish UE1 and UE2 in the access process, this is the characteristic of the ZC sequence. Therefore, the maximum coverage radius of the cell is limited by the cyclic shift value.

FIG. 2 is a flowchart of an embodiment of a method for sharing an uplink access channel according to the present invention.

Step 10: Send uplink access configuration signaling, where the configuration signaling includes an identifier for indicating the first step size value and or the second step size value. The second step value is greater than the first step value.

When the uplink access configuration signaling is sent to the terminal device, at least a first step size value is included; when the uplink access configuration signaling is sent to a relay device, at least a second step size value is included.

Considering that the access radius of the relay device is larger than the access radius of the terminal device, when the terminal and the relay are configured with the same resources, for the same ZC root sequence, two cyclic shift step values N _cs can be defined, the smaller The larger N _cs is used for terminal device access, and the larger N _cs is used for relay device access.

In the prior art, the step size of the cyclic shift is obtained through a high-level configuration parameter (zeroCorrelationZoneConfig). In order to support different cyclic shift step sizes of relays and terminals, two high-level configuration parameters are introduced, one for the terminal configuration parameter (zeroCorrelationZoneConfig_UE), that is, the identifier of the first step length value, which is used to obtain relatively small cyclic shifts. The bit step value, another configuration parameter (zeroCorrelationZoneConfig_IAB) for relaying, that is, the identifier of the second step value, obtains a relatively large cyclic shift step value.

As an example in the following table, the value setting range of the first step length value identifier (zeroCorrelationZoneConfig_UE) used for the terminal device is 0 to 10. Correspondingly, the first step length value is the N _CS value in rows 0 to 10 in the table; The value of the second step value identifier (zeroCorrelationZoneConfig_IAB) used for the relay device is set in the range of 11 to 15, and the second step value is the N _cs value in the 11th to 15th rows in the table; this ensures that the loop of the terminal device is The smaller the shift, the larger the cyclic shift of the relay device.

Table 1. The first step length value (or the second step length value) identifies the index table

(The values in the above table are only examples, the specific parameters are taken from "Table 6.3.3.1-7: N _cs for preamble formats with Δf ^RA =15·2 ^μ kHz where μ∈{0,1,2,3}" in 3GPP standard 38.211 )

Step 20: Receive configuration signaling, and use the first step value or the second step value to cyclically shift at least one root sequence to obtain a random access sequence.

The existing mechanism is to configure parameters at high layers to obtain the root sequence and step size value for generating random access sequences until a total of 64 random access sequences are generated. For example, 13 random access sequences are generated with one root sequence. To generate 64 random access sequences, a total of 5 root sequences are required.

For example, the relay device receives configuration signaling, where the configuration signaling includes an identifier for indicating the second step value; and cyclically shifts at least one root sequence with the second step value to obtain the second random access sequence; all or part of the second random access sequence is determined as a set of the second random access sequence.

For another example, the terminal device receives configuration signaling, where the configuration signaling includes an identifier for indicating the first-step length value; cyclically shifts the at least one root sequence with the first-step length value to obtain the the first random access sequence; the part identical to the second random access sequence is excluded from all the first random access sequences, and is determined as the set of the first random access sequences.

The random access sequence used for the terminal device belongs to the set of the first random access sequence; the random access sequence used for the relay device belongs to the set of the second random access sequence.

Step 30: Send the random access sequence, where the random access sequence belongs to the set of the first random access sequence or the set of the second random access sequence;

The random access sequence sent by the terminal device is the first random access sequence, which is generated by at least one root sequence through cyclic shift under the condition of the first length value.

The random access sequence sent by the relay device is the second random access sequence, which is generated by cyclic shift of the at least one root sequence under the condition of the second step size.

Step 40: Receive the random access sequence, and determine that the random access sequence belongs to the set of the first random access sequence or the set of the second random access sequence;

FIG. 3 is a schematic diagram of a set of random access sequences when the second step size is a multiple of the first step size.

As an optimized embodiment of the present invention, the second step size value is a multiple of the first step size value. In the set of the first random access sequence, the first random access sequence that is the same as any one of the set of the second random access sequence is excluded. The total number of random sequences included in the first random sequence set and the second random sequence set is 64.

In order to support the different cyclic shifts of the relay equipment and the terminal equipment, the base station side configures the cyclic shift step size of the relay equipment according to the coverage of the covered relay equipment to be the multiple N of the terminal equipment cyclic shift (N is positive. Integer), to ensure that the relay device uses a cyclic shift step size N times larger than that of the terminal to generate the random access sequence, so as to meet the requirement of inconsistent coverage of the relay device and the terminal.

It should be pointed out here that since the random access rate of the relay device is relatively low, it can generate a smaller number of random access sequences than the terminal.

As shown in FIG. 3 , for the terminal device, when the high-level configuration N _cs = 10, each ZC sequence needs 13 cyclic shifts to generate a random access sequence, and a total of 5 ZC sequences are required to generate a total of 5 ZC sequences according to the cyclic shift. 64 random access sequences, each block in the figure represents a random access sequence;

According to the high-level configuration of this patent, the relay device is configured with a step size of 4 times the size, that is, N _cs =40 to generate a random access sequence, and each root sequence generates three cyclically shifted random access sequences, which can generate 15 random access sequence for the relay. The specific cyclic shift values C _v are 0, 40, and 80. Each square in the figure represents a random access sequence, and the gray square represents a set of second random access sequences. In the embodiment shown in FIG. 3 , the set of the second random access sequences includes all the second random access sequences.

To avoid collisions, all N times of cyclic shifts are used for relay devices, and the remaining cyclic shifts are used for terminals. _Cv = 0 in the example, 40 and 80 are used for the relay device. Finally, the number of random access sequences used for the relay is 15, and the number of random access sequences used for the terminal is 49. That is, in all the first random sequences, the parts overlapping with the gray squares (indicated by a cross) are removed to obtain a set of first random sequences.

FIG. 4 is a schematic diagram of a set of second random access sequences including part of the second random access sequence.

Preferably, the set of the second random access sequence includes part of the second random access sequence. In the set of the first random access sequence, the first random access sequence that is the same as any one of the set of the second random access sequence is excluded. The total number of random sequences included in the first random sequence set and the second random sequence set is 64.

The base station configures the terminal and the relay with its dedicated root sequence and cyclic _shift to ensure the dedicated access sequence for the terminal and the relay. _cs =40. The terminal generates C _v =40, 50, . . . , 120 of the random access sequence at the second root sequence, and the relay generates C _v =0 of the random access sequence at the second root sequence. The terminal generates the cyclic shift value C v of the random access sequence at the fourth root sequence C _v =0, 10, 20, 30, 80, 90, 100, 110, 120; the relay generates random access at the third root sequence _Cv =40 for the sequence. The terminal generates the cyclic shift value C v of the random access sequence at the fifth root sequence C _v =0, 10, 20, 30, 40, 50, 60, 70, 120; the relay generates random access at the fifth root sequence _Cv =80 for the sequence. In the figure, each square represents a random access sequence, and the gray square represents a set of second random access sequences, which is a designated part in all the second random access sequences (the rest are represented by ×). In this example, the number of random access sequences used for relaying is three. In all the first random sequences, the part that overlaps with the gray squares (indicated by a cross) is removed to obtain a set of first random sequences, and the number of random access sequences used for the terminal is 61.

In the present invention, the terminal and the relay device share the same sequence, and two cyclic shift step values are introduced. The design principle is that a small step value is used for the terminal device, and a large step value is used for the relay device. There are three ways to indicate, one is to divide the configurable step value into two types, so that one type of slightly larger step value is used for relay devices, the other type of small step value is used for terminal equipment, and the other One is to indicate that the step value of the relay device is a multiple of the step value of the terminal device, and the third is to directly configure a part of the random access sequence according to the high step value in the generated 64 access sequences for the relay device to use. .

An embodiment of the present application further provides a device for use in the method described in any embodiment of the present application, where the device is configured to receive configuration signaling, where the configuration signaling includes a value used to indicate the second step value. identification; cyclically shift at least one root sequence with the second step value to obtain the second random access sequence; determine all or part of the second random access sequence as the second random access sequence A collection of incoming sequences.

Preferably, the device is configured to receive configuration signaling, and the configuration signaling includes an identifier used to indicate the first-step length value; the at least one root sequence is cyclically shifted by the first-step length value , obtain the first random access sequence; exclude the part identical to the second random access sequence from all the first random access sequences, and determine the set as the first random access sequence.

Further preferably, the random access sequence sent by the device belongs to the set of the first random access sequence or the set of the second random access sequence. When the device is set in the terminal device 62, the random access sequence belongs to the set of the first random access sequence; when the device is set in the relay device 61, the random access sequence belongs to the set of second random access sequences.

The embodiment of the present application further proposes a device that, when set in the base station device 60, sends the configuration signaling, receives the random access sequence, and determines that the random access sequence belongs to the first random access sequence A set of sequences or a set of second random access sequences.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (10)

1. An uplink access sharing method is characterized by comprising the following steps:

a random access sequence for a terminal device belonging to a set of first random access sequences; the first random access sequence is generated by cyclic shift of at least one root sequence under the condition of a first step value;

a random access sequence for the relay device belonging to a set of second random access sequences; the second random access sequence is generated by cyclic shift of the at least one root sequence under the condition of a second step value;

the second step size value is greater than the first step size value.

2. The method of claim 1,

the second step value is a multiple of the first step value.

3. The method of claim 1 or 2,

the set of second random access sequences comprises part or all of the second random access sequences.

4. The method of claim 1 or 2, further comprising the steps of:

and excluding the first random access sequence which is the same as any one of the set of the second random access sequences from the set of the first random access sequences.

5. An uplink access configuration signaling for the method of any of claims 1 to 4, comprising an identifier for indicating the first step size value and/or the second step size value.

6. The configuration signaling of claim 5, wherein the configuration signaling is used to indicate that the second step size is a multiple of the first step size.

7. An apparatus for use in the method of any one of claims 1 to 4, characterized in that

The device is configured to receive configuration signaling including an identifier indicating the second step value;

circularly shifting at least one root sequence by using the second step value to obtain the second random access sequence; determining all or part of the second random access sequence as the set of second random access sequences.

8. The apparatus of claim 7, wherein the apparatus is further characterized by

The apparatus is configured to receive configuration signaling including an identification indicating the first step size value;

cyclically shifting the at least one root sequence by the first step size value to obtain the first machine access sequence; excluding the same part as that in the set of the second random access sequences from all the first random access sequences, and determining the part as the set of the first random access sequences.

9. The apparatus according to any one of claims 7 to 8,

and the equipment sends the random access sequence, and belongs to the set of the first random access sequence or the set of the second random access sequence.

10. An apparatus for use in the method according to any one of claims 1 to 5,

the device sends the configuration signaling;

and the equipment receives the random access sequence and judges that the random access sequence belongs to the set of the first random access sequence or the set of the second random access sequence.

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