CN106304344B - Resource pool configuration method and D2D UE - Google Patents

Resource pool configuration method and D2D UE Download PDF

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CN106304344B
CN106304344B CN201510251272.3A CN201510251272A CN106304344B CN 106304344 B CN106304344 B CN 106304344B CN 201510251272 A CN201510251272 A CN 201510251272A CN 106304344 B CN106304344 B CN 106304344B
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subframe
mapping
pscch
bitmap sequence
configuration bitmap
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CN106304344A (en
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杨瑾
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

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Abstract

The invention discloses a resource pool configuration method and a device, wherein the method comprises the following steps: acquiring a subframe configuration bitmap sequence of the PSCCH; the subframe configuration bitmap sequence comprises N indicating bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in the PSCCH period is a PSCCH subframe or not; determining mapping frequency information and mapping offset of a subframe configuration bitmap sequence; the mapping frequency information comprises total mapping frequency or repeated mapping frequency; the total mapping times are used for indicating the total times of mapping of the subframe configuration bitmap sequence in a PSCCH period; the repeated mapping times are used for indicating the repeated times of the mapping of the subframe configuration bitmap sequence in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings; and determining the PSCCH subframe in the PSCCH period according to the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset.

Description

Resource pool configuration method and D2D UE
Technical Field
The present invention relates To the field of communications, and in particular, To a resource pool configuration method and Device To Device (Device To Device, abbreviated as D2D) user equipment UE.
Background
In a D2D communication system, when there is a service to be transmitted between User equipments (User Equipment, abbreviated as UE), the service data between UEs is directly transmitted to a target UE through an air interface by a data source UE without being forwarded by a base station. As shown in fig. 1, both UE1 and UE2 are D2D UEs, and UE1 and UE2 may communicate via a side link (Sidelink) without going through a base station, i.e., D2D communication. The D2D communication mode has the characteristics obviously different from the cellular system communication mode, and for the short-distance communication users who can use the D2D communication mode, the D2D transmission not only saves the wireless spectrum resources, but also reduces the data transmission pressure of the core network, can reduce the system resource occupation, increase the spectrum efficiency of the cellular communication system, reduce the terminal transmission power consumption, and save the network operation cost to a great extent.
In the D2D communication system, the UEs directly transmit data, the sending end UE may obtain the Physical side link Control Channel (PSCCH) and Physical side link Shared Channel (pscsch) resources for D2D communication according to the scheduling configuration of the network side, or may contend for the selected resources in the given PSCCH and PSCCH resource pools to perform D2D communication Control and data information transmission.
The resource configuration for D2D communication is repeated periodically, each period may be referred to as a PSCCH period. In the prior art, in the PSCCH period, a part of subframes are PSCCH subframes used for transmitting side link Control Information (SCI Information), and a part of subframes are PSCCH subframes used for transmitting data Information. When D2D communication is performed, data information is transmitted and received in association with the SCI information, so that reasonable configuration of PSCCH subframes and PSCCH subframes affects resource utilization and data transmission rate and efficiency within a PSCCH period.
Disclosure of Invention
In view of this, embodiments of the present invention are intended to provide a resource pool configuration method and a D2D UE, so as to reasonably configure subframes in the PSCCH period, so as to improve resource utilization and transmission efficiency of data information.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a first aspect of an embodiment of the present invention provides a resource pool configuration method, where the method includes:
acquiring a subframe configuration bitmap sequence of a physical side link control channel (PSCCH); wherein the subframe configuration bitmap sequence comprises N indicator bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in a PSCCH period is a PSCCH subframe or not; n is a positive integer; n is a positive integer not greater than N;
determining mapping frequency information and mapping offset of the subframe configuration bitmap sequence;
performing subframe configuration bitmap sequence mapping according to the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset to determine a PSCCH subframe in a PSCCH period;
wherein, the mapping times information is total mapping times or repeated mapping times; the total mapping times are used for indicating the total times of mapping the subframe configuration bitmap sequence in the PSCCH period; the repeated mapping times are used for indicating the repeated times of the subframe configuration bitmap sequence mapping in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings.
Preferably, the determining a PSCCH subframe in a PSCCH period by mapping a subframe configuration bitmap sequence according to the subframe configuration bitmap sequence, the mapping frequency information, and the mapping offset includes:
starting from a starting subframe of the PSCCH period, carrying out first-time mapping on the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence; wherein the starting subframe of the PSCCH period is the first subframe in the PSCCH period.
Preferably, the determining a PSCCH subframe in a PSCCH period by mapping a subframe configuration bitmap sequence according to the subframe configuration bitmap sequence, the mapping frequency information, and the mapping offset includes:
starting from the initial subframe mapped by the subframe configuration bitmap sequence for the mth time, carrying out subframe offset according to the mapping offset, and determining the initial subframe mapped by the subframe configuration bitmap sequence for the (m + 1) th time; wherein, the starting subframe of the m-th mapping of the subframe configuration bitmap sequence is a subframe corresponding to a first indication bit in the m-th mapping of the subframe configuration bitmap sequence;
or
Starting from the first subframe after the last PSCCH subframe determined by the m-th subframe configuration bitmap sequence mapping, performing subframe offset according to the mapping offset, and determining the starting subframe of the m + 1-th subframe configuration bitmap sequence mapping;
or the like, or, alternatively,
starting from the first subframe after the cut-off subframe mapped by the m-th subframe configuration bitmap sequence, carrying out subframe offset according to the mapping offset, and determining the starting subframe mapped by the m + 1-th subframe configuration bitmap sequence; the subframe of the m-th subframe configuration bitmap sequence mapping is a subframe corresponding to the last indication bit in the subframe configuration bitmap sequence in the m-th subframe configuration bitmap sequence mapping;
wherein m is a positive integer less than the total number of mappings or no greater than the number of repeated mappings.
Preferably, the side link control information sent on the PSCCH subframe determined by the kth subframe configuration bitmap sequence mapping indicates that the PSCCH subframe used for data transmission ranges from subframe s to subframe t;
the subframe s is a first subframe after the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping; or the subframe s is the first subframe which is located in the PSSCH resource pool and is behind the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping;
the subframe t is a subframe before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a last subframe which is located in the PSSCH resource pool and is before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a subframe before a first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSSCH resource pool before the first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSCCH period or the last subframe in the PSSCH resource pool;
wherein the PSSCH resource pool comprises at least one PSSCH subframe.
Preferably, the determining the mapping times information and the mapping offset of the subframe configuration bitmap sequence includes at least one of the following:
determining the mapping number information and/or the mapping offset based on preconfigured information;
determining the mapping times information and/or the mapping offset based on system definition information;
receiving a high-level signaling and acquiring mapping frequency information and/or the mapping offset from the high-level signaling;
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSCCH resource pool; the attribute information of the PSCCH resource pool comprises the period of the PSCCH resource pool and/or the number of PSCCH subframes contained in the PSCCH resource pool;
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSSCH resource pool; the attribute information of the PSSCH resource pool comprises the period of the PSSCH resource pool and/or the number of PSSCH subframes contained in the PSSCH resource pool;
the PSSCH resource pool includes at least one PSSCH subframe.
Preferably, the higher layer signaling comprises system messages;
the mapping number information and/or the mapping offset is used for determining the PSCCH subframe for all device-to-device D2D UEs or D2D UEs within a designated D2D group within the cell transmitting the system message.
Preferably, the higher layer signaling comprises a radio resource control, RRC, message;
the mapping number information and/or the mapping offset are carried in a device-to-device communication configuration information element of the RRC message and/or a configuration information element related to a device-to-device communication relay.
Preferably, the method further comprises:
and when the determined PSCCH sub-frame is overlapped with a PSSCH sub-frame in the PSSCH resource pool, determining that the sub-frame overlapped with the PSCCH sub-frame in the PSSCH resource pool is not used for sending data information.
A second aspect of the present invention provides a D2D UE, where the D2DUE includes:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring a subframe configuration bitmap sequence of a physical side link control channel (PSCCH); wherein the subframe configuration bitmap sequence comprises N indicator bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in a PSCCH period is a PSCCH subframe or not; n is a positive integer; n is a positive integer not greater than N;
a first determining unit, configured to determine mapping frequency information and mapping offset of the subframe configuration bitmap sequence; a second determining unit, configured to perform subframe configuration bitmap sequence mapping to determine a PSCCH subframe in a PSCCH period according to the subframe configuration bitmap sequence, the mapping frequency information, and the mapping offset;
wherein, the mapping times information is total mapping times or repeated mapping times; the total mapping times are used for indicating the total times of mapping the subframe configuration bitmap sequence in the PSCCH period; the repeated mapping times are used for indicating the repeated times of the subframe configuration bitmap sequence mapping in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings.
Preferably, the second determining unit is specifically configured to perform, starting from a starting subframe of the PSCCH period, the first mapping of the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence; wherein the starting subframe of the PSCCH period is the first subframe in the PSCCH period.
Preferably, the second determining unit is further specifically configured to perform subframe shifting from a starting subframe mapped by the subframe configuration bitmap sequence for the mth time according to the mapping offset, and determine a starting subframe mapped by the subframe configuration bitmap sequence for the m +1 th time; wherein, the starting subframe of the m-th mapping of the subframe configuration bitmap sequence is a subframe corresponding to a first indication bit in the m-th mapping of the subframe configuration bitmap sequence;
or
Starting from the first subframe after the last PSCCH subframe determined by the m-th subframe configuration bitmap sequence mapping, performing subframe offset according to the mapping offset, and determining the starting subframe of the m + 1-th subframe configuration bitmap sequence mapping;
or the like, or, alternatively,
starting from the first subframe after the cut-off subframe mapped by the m-th subframe configuration bitmap sequence, carrying out subframe offset according to the mapping offset, and determining the starting subframe mapped by the m + 1-th subframe configuration bitmap sequence; the subframe of the m-th subframe configuration bitmap sequence mapping is a subframe corresponding to the last indication bit in the subframe configuration bitmap sequence in the m-th subframe configuration bitmap sequence mapping;
wherein m is a positive integer less than the total number of mappings or no greater than the number of repeated mappings.
Preferably, the side link control information sent on the PSCCH subframe determined by the kth subframe configuration bitmap sequence mapping indicates that the PSCCH subframe used for data transmission ranges from subframe s to subframe t;
the subframe s is a first subframe after the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping; or the subframe s is the first subframe which is located in the PSSCH resource pool and is behind the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping;
the subframe t is a subframe before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping;
the subframe t is a last subframe which is located in the PSSCH resource pool and is before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a subframe before a first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSSCH resource pool before the first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSCCH period or the last subframe in the PSSCH resource pool;
wherein the PSSCH resource pool comprises at least one PSSCH subframe.
Preferably, the first determining unit is specifically configured to determine the mapping number information and/or the mapping offset based on preconfigured information; and/or the presence of a gas in the gas,
determining the mapping times information and/or the mapping offset based on system definition information; and/or the presence of a gas in the gas,
receiving a high-level signaling and acquiring mapping frequency information and/or the mapping offset from the high-level signaling; and/or the presence of a gas in the gas,
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSCCH resource pool; the attribute information of the PSCCH resource pool comprises the period of the PSCCH resource pool and/or the number of PSCCH subframes contained in the PSCCH resource pool;
and/or determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSSCH resource pool; the attribute information of the PSSCH resource pool comprises the period of the PSSCH resource pool and/or the number of PSSCH subframes contained in the PSSCH resource pool;
the PSSCH resource pool includes at least one PSSCH subframe.
Preferably, the higher layer signaling comprises system messages;
the mapping number information and the mapping offset are used for determining the PSCCH subframe for all D2D UEs in a cell sending the system message or D2D UEs in a designated D2D group.
Preferably, the higher layer signaling comprises a radio resource control, RRC, message;
the mapping number information and/or the mapping offset are carried in a device-to-device communication configuration information element of the RRC message and/or a configuration information element related to a device-to-device communication relay.
Preferably, the D2D UE further includes:
a third determining unit, configured to determine that a subframe in the PSCCH resource pool that overlaps with the PSCCH subframe is not used for transmitting data information when the determined PSCCH subframe overlaps with the PSCCH subframe in the PSCCH resource pool. The method for configuring the sub-frame in the PSCCH resource pool and the D2D UE in the embodiment of the invention, when the subframe configuration is carried out, the subframe configuration bitmap sequence mapping is carried out once or more times in one PSCCH period by combining the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset, thus, when the subsequent D2D UE is in communication, the maximum number of SCI information which can be transmitted is equal to the number of times of mapping of subframe configuration bitmap sequences in one PSCCH period, therefore, the D2D UE can transmit a plurality of SCI information in one PSCCH period, the D2D UE can conveniently adopt a plurality of SCI information to carry out PSSCH resource scheduling and a plurality of data transmission, and there is a greater probability of dispersing the PSCCH subframes throughout the PSCCH period, the data transmission of the D2D UE in different time periods of the PSCCH period is facilitated, and the resource utilization rate and the transmission efficiency in the PSCCH period are improved.
Drawings
FIG. 1 is a schematic diagram of D2D communication;
FIG. 2 is a schematic diagram illustrating the configuration effect of a subframe configuration;
FIG. 3 is a flowchart illustrating a method for configuring subframes according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a configuration effect of the subframe configuration according to the embodiment of the present invention;
FIGS. 5a to 5c are schematic diagrams of the starting positions of the sub-frame offsets according to the embodiment of the present invention;
fig. 6 to 7 are schematic diagrams of ranges of PSCCH subframes indicated by SCI information transmitted by PSCCH subframes according to an embodiment of the present invention;
fig. 8 to fig. 9 are schematic flowcharts of a method for determining mapping frequency information and mapping offset according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a subframe configuration apparatus according to an embodiment of the present invention.
Detailed Description
The PSCCH resource pool configuration is repeated periodically, each period comprises one or more PSCCH subframes, and the indication of the PSCCH subframes is realized through a subframe configuration bitmap sequence (bitmap). And mapping the bitmap sequence from the starting position of the PSCCH period according to the bitmap sequence indicated by the base station or pre-configured by the system, wherein generally, when the indication bit of the corresponding subframe configuration bitmap sequence is '1', the subframe is a PSCCH subframe, and when the indication bit is '0', the subframe is not taken as the PSCCH subframe.
On the PSCCH subframe, the D2D UE sends SCI information. The SCI information is used to indicate information such as a psch subframe and Resource Block (RB) configuration where corresponding data information is located. The configuration of the PSSCH subframe may be indicated by a time domain Resource Pattern (TRP) in the SCI information, and the corresponding PSSCH subframe configuration may be determined according to the TRP. The PSSCH sub-frame indicated by the TRP is repeatedly mapped in the period until the period is finished. When the D2D UE adopts the resource mode one, the PSSCH sub-frame indicated by the TRP is mapped on continuous system uplink sub-frames, and when the resource mode two is adopted, the PSSCH sub-frame indicated by the TRP is mapped on sub-frames contained in the PSSCH resource pool on the basis of the corresponding PSSCH resource pool.
And when the subframe configuration is carried out, starting the first-time subframe configuration bitmap sequence mapping from the PSCCH period starting subframe based on the subframe configuration bitmap sequence. And the subframe range indicated by the subframe configuration bitmap sequence is from the first subframe to the Nth subframe in a PSCCH period. And the N is the number of indicating bits included in the subframe configuration bitmap sequence. As shown in fig. 2, the subframe configuration bitmap may correspond to N subframes. At this time, the general subframe configuration bitmap sequence includes N indication bits, and the N indication bits can be used to indicate whether N subframes are PSCCH subframes. In fig. 2, the subframe configuration bitmap sequence is used to indicate which subframes of the first N subframes within the PSCCH period are to be PSCCH subframes.
By adopting the subframe configuration mode, at most N PSCCH subframes are configured in the PSCCH period, and the N PSCCH subframes are positioned in the first N subframes of the PSCCH period. First, in this configuration case, one D2D sender UE can send only one SCI message; secondly, based on the SCI information, PSSCH resource scheduling and scheduling transmission of a group of data can be performed only once; again, there may be a situation that the UE cannot transmit SCI information after N subframes of the PSCCH period, and cannot perform D2D communication scheduled in real time, which may cause problems of waste of D2D communication resources, low transmission delay and data transmission rate of D2D communication, and the like. When one UE performs D2D communication or transmits multiple groups of different data to multiple UEs in the PSCCH period, the UE cannot perform the D2D communication because the configuration and transmission rule of the subframes in the PSCCH period cannot satisfy the corresponding requirements.
In the method, when the PSCCH subframe is configured, mapping times information and mapping offset are introduced, so that when the subframe is configured, the mapping of the subframe configuration bitmap sequence is performed for 2 times or more than 2 times based on the PSCCH subframe configuration bitmap sequence, the limitation that the PSCCH subframe can only be configured in the first N subframes of the PSCCH period can be broken, meanwhile, the PSCCH subframe can be dispersed in the whole period of the PSCCH period, and the UE can perform flexible SCI transmission and PSSCH resource indication.
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
The method comprises the following steps:
as shown in fig. 3, this embodiment provides a resource pool configuration method, where the method includes:
step S110: acquiring a subframe configuration bitmap sequence of a physical side link control channel (PSCCH); wherein the subframe configuration bitmap sequence comprises N indicator bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in a PSCCH period is a PSCCH subframe or not; n is a positive integer; n is a positive integer not greater than N;
step S120: determining mapping frequency information and mapping offset of the subframe configuration bitmap sequence; step S130: performing subframe configuration bitmap sequence mapping according to the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset to determine a PSCCH subframe in a PSCCH period;
wherein, the mapping times information is total mapping times or repeated mapping times; the total mapping times are used for indicating the total times of mapping the subframe configuration bitmap sequence in the PSCCH period; the repeated mapping times are used for indicating the repeated times of the subframe configuration bitmap sequence mapping in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings.
The resource pool configuration method described in this embodiment may also be referred to as a subframe type determination method, and may be applied to D2D UEs in the D2D communication process, and may be used as a transmitting-end UE for D2D communication, and may also be applied to a receiving-end UE for D2D communication. When applied to a D2D sender UE, the sender UE may transmit SCI information for D2D communications using one or more PSCCH subframes according to the determined PSCCH subframe configuration, and transmit D2D communications data on the PSCCH subframe indicated by the SCI. The receiving end UE may perform blind detection of SCI on the PSCCH subframe according to the determined PSCCH subframe configuration, and further receive data on the indicated PSCCH subframe according to the detected SCI, thereby completing data interaction in D2D communication.
The manner of acquiring the subframe configuration bitmap sequence in step S110 includes: a subframe configuration bitmap sequence is received from a base station. The D2D UE typically receives a subframe configuration bitmap sequence from the base station in its geographical location. The base station may include various types of base stations, such as a macro base station, and specifically, an evolved node b (eNB).
In step S120, it is determined that the mapping number information can directly or indirectly characterize the number of times that the subframe configuration bitmap sequence is mapped within one PSCCH period. The number of repeated mappings is equal to the total number of mappings minus 1. If the repeated mapping times of a subframe configuration bitmap sequence are 3 times, the total mapping times of the subframe configuration bitmap sequence in a PSCCH period are 4 times. Whether the subframe corresponding to each indication bit is a PSCCH subframe or not can be determined according to the information content of the corresponding indication bit. Each indication bit is in two states of '0' or '1', and normally, when the information indication bit is in '1', the corresponding subframe is a PSCCH subframe, otherwise, the corresponding subframe is a non-PSCCH subframe.
In this embodiment, the mapping offset is in units of subframes, and the value range is not less than 1 and less than the total number of subframes included in the PSCCH period. And based on the subframe offset determined by the mapping offset, the subframe configuration bitmap sequence is mapped for multiple times on different subframes in the PSCCH period.
The mapping number information and the mapping offset may be pre-stored in the D2D UE, and the determining the mapping number information and the mapping offset in step S120 includes: reading the mapping time information and the mapping offset from a storage area in which the mapping time information and the mapping offset are stored; or receiving the configuration information of the mapping times information and the mapping offset from the peripheral equipment such as the base station.
When performing subframe configuration bitmap sequence mapping in step S130, the starting subframe for performing first subframe configuration bitmap sequence mapping may be any subframe in the PSCCH period, but in order to be better compatible with the prior art and more importantly better utilize resources in the PSCCH period, in this embodiment, it is preferable to perform first subframe configuration bitmap sequence mapping according to the subframe configuration bitmap sequence starting from the starting subframe in the PSCCH period. In this case, the subframe configuration bitmap sequence has a first indication bit for indicating whether the first subframe in the PSCCH period is a PSCCH subframe.
Fig. 4 is one of the configuration effect diagrams formed by the resource pool configuration method according to this embodiment. The number of times of repeated mapping N in FIG. 4repeatEqual to 2. I.e. the subframe configuration bitmap sequence will be mapped 3 times in the PSCCH period shown in figure 4. And 4 of the N indicating bits of the subframe configuration bitmap sequence indicate that the corresponding subframe is a PSCCH subframe, and subframe configuration bitmap sequence mapping is performed 3 times in the PSCCH period to form a subframe configured with 12 PSCCH subframes as shown in fig. 4. As can be seen from fig. 4, the number of subframes corresponding to the mapping offset is greater than the number of subframes indicated by the subframe configuration bitmap sequence for performing subframe configuration bitmap sequence mapping once, so that PSCCH subframes determined by multiple times of mapping are dispersed in a PSCCH period. Obviously, the resource pool configuration method of the embodiment can configure more PSCCH subframes, and simultaneously can enable the PSCCH subframes to be more uniformly distributed in the whole PSCCH period, thereby facilitating and better improving the subframe utilization rate and the data transmission rate in D2D communication.
Obviously, in the method for configuring a resource pool in this embodiment, when the number of times of repeated mapping is not 0 or the total number of times of mapping is not less than 2, the number of times of mapping of a subframe configuration bitmap sequence performed based on the subframe configuration bitmap sequence is not less than two, so that a D2D sending end UE can send 2 or more SCI information, and schedule and transmit multiple groups of data based on the indication that multiple times of PSSCH resource scheduling can be performed based on the sending of multiple SCI information; the data broadcasting and/or unicasting can be carried out twice or more; therefore, the resource utilization rate and the data transmission efficiency are improved.
There are various ways to perform subframe shifting based on the subframe offset, and three alternative ways are provided below.
The first method is as follows:
as shown in fig. 5a, the step S130 may include:
and starting from the initial subframe mapped by the m-th subframe configuration bitmap sequence, performing subframe offset according to the mapping offset, and determining the initial subframe mapped by the m + 1-th subframe configuration bitmap sequence. The starting subframe mapped by the subframe configuration bitmap sequence refers to a subframe corresponding to a first indicator bit in the subframe configuration bitmap sequence. In the subframe shifting mode, the value of the subframe number corresponding to the mapping offset is preferably greater than the number of subframes indicated by the subframe configuration bitmap sequence for performing subframe configuration bitmap sequence once, so that the PSCCH subframes determined by multiple times of subframe configuration bitmap sequence mapping can be distributed in the PSCCH period in a discrete manner, and the UE can conveniently send SCI information by using the PSCCH subframes at different moments. In addition, if the number of the subframes corresponding to the mapping offset is greater than the number of the subframes indicated by the subframe configuration bitmap sequence for one-time subframe configuration bitmap sequence, the phenomenon that the same subframe is selected repeatedly as a PSCCH subframe in the process of mapping the subframe configuration bitmap sequence for multiple times can be avoided.
The second method comprises the following steps:
as shown in fig. 5b, the step S130 may include:
and starting from the first subframe after the last PSCCH subframe determined by the m-th subframe configuration bitmap sequence mapping, performing subframe offset according to the mapping offset, and determining the starting subframe of the m + 1-th subframe configuration bitmap sequence mapping. And the starting subframe of the m-th mapping of the subframe configuration bitmap sequence is a subframe corresponding to a first indication bit in the subframe configuration bitmap sequence in the m-th mapping of the subframe configuration bitmap sequence.
In this embodiment, the last PSCCH subframe determined from the mth subframe configuration bitmap sequence mapping may be a subframe with the largest sequence number in PSCCH subframes determined in the mth subframe configuration bitmap sequence mapping process. The offset mode of mapping the subframe configuration bitmap sequence can avoid the problem of mapping to the same subframe in the process of mapping the subframe configuration bitmap sequence twice to the maximum extent, and is simple and convenient to implement.
The third method comprises the following steps:
as shown in fig. 5c, the step S130 may include:
and starting from the first subframe after the cut-off subframe mapped by the m-th subframe configuration bitmap sequence, performing subframe offset according to the mapping offset, and determining the starting subframe mapped by the m + 1-th subframe configuration bitmap sequence.
And the cut-off subframe mapped by the m-th subframe configuration bitmap sequence is a subframe corresponding to the last indicator bit in the subframe configuration bitmap sequence in the m-th subframe configuration bitmap sequence mapping.
The method can also avoid the problem that multiple mapping indications of the subframe configuration bitmap sequence are mapped to the same subframe, and can also achieve the purpose of dispersing the PSCCH subframe in the PSCCH period.
It should be noted that, in any of the three manners, the value of m is smaller than the total mapping times or not larger than the repeated mapping times.
The PSCCH subframe is used to transmit SCI information, and may be used to indicate control information of all PSCCH subframes located after the PSCCH subframe.
SCI sent on PSCCH subframe determined by the kth subframe configuration bitmap sequence mapping may indicate a range of PSCCH subframes from subframe s to subframe t.
At this time, the subframe s is the first subframe after the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping; or the subframe s is the first subframe which is located in the resource pool of the PSSCH and behind the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping;
the subframe t is a subframe before the initial subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or the subframe t is the last subframe located in the PSSCH resource pool before the starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; the subframe t is a subframe before the first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or the subframe t is before the first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping and is located in the last subframe in the PSCCH resource pool; or the subframe t is the last subframe in the PSCCH period or the last subframe in the PSCCH resource pool.
In this embodiment, because the PSCCH subframe configuration bitmap sequence is mapped multiple times in one period, the range of the PSCCH subframe that can be indicated in the SCI information sent on the PSCCH subframe in each subframe configuration bitmap sequence mapping needs to be determined, and the indication relationship between the SCI and the corresponding PSCCH subframe needs to be determined.
Determining mapping times information and mapping offset in step 120; there are various ways for the D2D UE to obtain the mapping times information and the mapping offset, and several alternatives are provided below.
The first method comprises the following steps: based on the preconfigured information, mapping number information and/or mapping offset is determined. Specifically, for example, the value of the mapping frequency information and/or the mapping offset is determined according to the bandwidth of the communication system and/or the duplex mode of the communication system, and is preconfigured by the relevant function nodes in the communication system and sent to the whole network through the network side device, or is preconfigured in the network side and/or the terminal device according to the operator requirement, and the mapping frequency information and/or the mapping offset is determined. The related functional node device and the network side device may be any one or more of the following: an evolved base station (eNB), a relay station (RN), a cell coordination entity (MCE), a Gateway (GW), a Mobility Management Equipment (MME), and an Evolved Universal Terrestrial Radio Access Network (EUTRAN) Operation Administration and Maintenance (OAM) manager.
And the second method comprises the following steps: determining the mapping number information and/or the mapping offset based on system definition information. The system definition information herein may include a communication protocol, and the D2D UE determines the value of the mapping number information and/or the mapping offset based on the communication protocol being followed.
And the third is that: receiving a high-level signaling and obtaining mapping times information and/or the mapping offset from the high-level signaling. In this mode, the value of the mapping frequency information and/or the mapping offset can be modified through signaling configuration, and the UE receives the high-level signaling sent by the base station where the UE is located, and obtains the value configuration of the mapping frequency information and/or the mapping offset carried in the high-level signaling. The high-layer signaling can comprise system information SIB sent by a base station and can also comprise high-layer signaling such as radio resource control RRC message and the like.
The mapping number information and/or the mapping offset is carried in the ProseCommConfig information element of the RRC message and/or in the configuration information element related to the Prose Relay. Here, the ProseCommConfig information element is the device-to-device communication configuration information element. The configuration information unit related to the Prose Relay is the configuration related to the device-to-device communication Relay.
And when the high-layer signaling is an SIB message, the indicated mapping frequency information and/or mapping offset configuration is used for all D2D UEs in the cell or D2 DUEs in the designated D2D group to determine the PSCCH subframe configuration.
And fourthly: determining mapping frequency information and/or mapping offset according to the attribute information of the PSCCH resource pool; the attribute information of the PSCCH resource pool comprises the period of the PSCCH resource pool and/or the number of PSCCH subframes contained in the PSCCH resource pool;
and a fifth mode: determining mapping frequency information and/or mapping offset according to the attribute information of the PSSCH resource pool; the attribute information of the PSSCH resource pool comprises the period of the PSSCH resource pool and/or the number of PSSCH subframes contained in the PSSCH resource pool. The psch resource pool is a resource pool that includes one or more psch subframes. When the method described in this embodiment is adopted, and the indicated PSCCH subframe overlaps with the PSCCH subframe, that is, corresponds to the same subframe, the method described in this embodiment further includes: and when the PSSCH and the PSCCH subframe are overlapped, determining the overlapped subframe to be used as the PSCCH subframe, wherein the overlapped subframe is used for transmitting SCI information and not transmitting data information.
Several specific examples are provided below in connection with the above-described embodiments.
Example one:
the present example provides a mapping offset
Figure BDA0000718333430000151
The three methods of use of (1);
in the present example, it is shown that,
Figure BDA0000718333430000152
indicates the relative offset between two adjacent bitmap sequence mappings, and
Figure BDA0000718333430000153
there are three ways of implementing the actual indication of (1). The bitmap sequence here is the above PSCCH subframe configuration bitmap sequence.
The method comprises the following steps:
Figure BDA0000718333430000154
indicating the second subframe after the start subframe mapped from the mth bitmap sequence of the bitmap sequence
Figure BDA0000718333430000155
Starting with each subframe, performing bitmap sequence mapping for the (m + 1) th time, as shown in fig. 5 a;
the second method comprises the following steps:
Figure BDA0000718333430000156
indicating the second subframe after the cut-off subframe mapped from the mth bitmap sequence of the bitmap sequence
Figure BDA0000718333430000157
Starting with each subframe, performing bitmap sequence mapping for the (m + 1) th time, as shown in fig. 5 c;
the third method comprises the following steps:
Figure BDA0000718333430000158
indicating the second from the last valid subframe in the mth bitmap sequence mapping of the bitmap sequence
Figure BDA0000718333430000161
Starting from one sub-frame, the (m + 1) th bitmap sequence mapping is performed, as shown in fig. 5 b.
Wherein, the initial subframe mapped by the bitmap sequence refers to a subframe corresponding to a first bit indication bit in the bitmap sequence; the ending subframe mapped by the bitmap sequence refers to a subframe corresponding to the last bit indication bit in the bitmap sequence, namely the Nth subframe from the initial subframe, wherein N is the length of the bitmap sequence, namely the number of bits contained in the bitmap sequence; the valid subframe in the bitmap sequence mapping refers to a subframe which is indicated in the bitmap sequence and is configured as a PSCCH resource, that is, a subframe corresponding to a corresponding indication bit of "1" in the bitmap sequence, and the last valid subframe corresponds to a subframe corresponding to an indication bit of the last position of "1" in the bitmap sequence.
Example two
In this example, when the D2D UE adopts the resource scheme of mode one, the corresponding indication relationship between the PSCCH resource and the PSCCH resource is provided based on the PSCCH subframe configuration determined by the present invention.
When the mode one is adopted, the PSCCH and PSCCH resources of the D2D UE can be scheduled and configured by the eNB, and the PSCCH subframes indicated by the TRP in the SCI information correspond to the system uplink subframes one by one according to subframes. At this time, when the PSCCH bitmap is repeatedly mapped in a period, the psch subframe range, which can be indicated by SCI information on the PSCCH subframe indicated by the kth bitmap sequence mapping, is from subframe s to subframe t.
The subframe s is the first subframe after the last effective subframe in the kth bitmap sequence mapping; the valid subframe here is the last PSCCH subframe determined in the kth bitmap sequence mapping.
The subframe t is the last subframe before the initial subframe mapped by the (k + 1) th bitmap sequence;
when k is equal to NrepeatAt +1, NrepeatFor the number of repeated mappings, subframe t is the last subframe in the PSCCH period.
As shown in FIG. 6, N repeat1, in SCI information carried on a PSCCH subframe indicated by the first bitmap sequence mapping, the range of an indicated PSCCH subframe is that a subframe s is a first subframe after a last effective subframe in the first bitmap sequence mapping, and a subframe t is a last subframe before a starting subframe in the second bitmap sequence mapping; in the SCI information carried on the PSCCH subframe indicated by the second bitmap sequence mapping, the range of the PSCCH subframe that can be indicated is that subframe s is the first subframe after the last valid subframe in the second bitmap sequence mapping, and subframe t is the last subframe in the PSCCH period.
Example three
In this example, when the D2D UE adopts the resource scheme of mode two, the corresponding indication relationship between the PSCCH resource and the PSCCH resource is provided based on the PSCCH subframe configuration determined by the present invention.
When the resource mode two is adopted, PSCCH and PSSCH resources of the D2D UE are selected and used by the UE in a competition mode in a configured resource pool, and PSSCH subframes indicated by TRP in SCI information correspond to subframes in the PSSCH resource pool one by one according to the subframes. At this time, when the bitmap sequence is repeatedly mapped in the PSCCH period, the psch subframe range, which can be indicated by SCI information on the PSCCH subframe indicated by the kth bitmap sequence mapping, is from subframe s to subframe t.
The sub-frame s is the first sub-frame contained in the PSSCH resource pool after the last effective sub-frame in the kth bitmap sequence mapping;
the sub-frame t is the last sub-frame contained in the PSSCH resource pool before the first effective sub-frame in the (k + 1) th bitmap sequence mapping;
when k is equal to Nrepeat+1, the subframe t is the last subframe contained in the PSCCH resource pool within the PSCCH period.
As shown in FIG. 7, N repeat1, in the SCI information carried on the PSCCH subframe indicated by the first bitmap sequence mapping, the indicated range of the PSCCH subframe is that the corresponding subframe s is the first subframe in the PSCCH resource pool after the last valid subframe indicated by the first bitmap sequence mapping(ii) a The corresponding sub-frame t is the last sub-frame in the PSSCH resource pool before the first effective sub-frame mapped by the bitmap sequence for the second time; in SCI information carried on a PSCCH subframe indicated by the second bitmap sequence mapping, the indicated range of the PSSCH subframe is that a corresponding subframe s is a first subframe in a PSSCH resource pool after the last effective subframe in the second bitmap sequence mapping; the corresponding sub-frame t is the last sub-frame in the PSSCH resource pool in the PSCCH period.
Example four
In this example, a method for sending the mapping number information and the mapping offset to the D2D UE by using higher layer signaling is provided.
The mapping number information and the mapping offset may be indicated by the system through higher layer signaling, such as a system broadcast information SIB or an RRC message.
As shown in fig. 8, the present example includes:
step S11: the eNB sends system information comprising mapping times information and mapping offset to the D2D UE;
step S12: the D2D UE determines the PSCCH subframe based on the mapping number information and the mapping offset, and of course, when specifically determining the PSCCH subframe, will also be determined based on the subframe configuration bitmap sequence.
As shown in fig. 9, the present example includes:
step S21: the eNB transmits an RRC message including the mapping number information and the mapping offset to the D2D UE.
Step S22: the D2D UE determines a PSCCH subframe based on the mapping number information and a mapping offset.
The mapping number information and the mapping offset can be configured for the UE independently through the RRC message, and each D2D UE in the cell can be configured separately, and the RRC message that can be used for carrying the mapping number information and the mapping offset parameter is a Prose comm configuration information element or a configuration information element related to the Prose Relay.
Example five
A method for determining mapping times information based on a PSCCH resource period.
The mapping time information is embodied as a repeated mappingNumber of shots NrepeatN can be defined by the system according to the period determination of the PSCCH resource poolrepeatThe index relation between the PSCCH resource pool period and any PSCCH period uniquely corresponds to one NrepeatTaking value, no signaling is needed to indicate N to D2D UErepeatConfiguration, D2D UE can directly determine N according to the period of PSCCH resource pool and the index relation of the tworepeatThe numerical value of (c). Table 1 shows a PSCCH resource pool period and NrepeatThe corresponding relationship of (1).
Figure BDA0000718333430000181
Figure BDA0000718333430000191
TABLE 1
The embodiment of the equipment comprises:
as shown in fig. 10, the present embodiment provides a D2D UE, where the D2DUE includes:
an obtaining unit 110, configured to obtain a subframe configuration bitmap sequence of a physical sidelink control channel PSCCH; wherein the subframe configuration bitmap sequence comprises N indicator bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in a PSCCH period is a PSCCH subframe or not; n is a positive integer; n is a positive integer not greater than N;
a first determining unit 120, configured to determine mapping frequency information and mapping offset of the subframe configuration bitmap sequence; a second determining unit 130, configured to perform subframe configuration bitmap sequence mapping according to the subframe configuration bitmap sequence, the mapping frequency information, and the mapping offset, so as to determine a PSCCH subframe in a PSCCH period.
The mapping frequency information is total mapping frequency or repeated mapping frequency; the total mapping times are used for indicating the total times of mapping the subframe configuration bitmap sequence in the PSCCH period; the repeated mapping times are used for indicating the repeated times of the subframe configuration bitmap sequence mapping in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings.
The specific structure of the obtaining unit 110 in this embodiment is different according to different ways of obtaining the subframe configuration bitmap sequence, and specifically, when the D2D UE receives the subframe configuration bitmap sequence from a peripheral device such as a base station, the D2D UE includes a receiving interface, and the receiving interface may include one or more receiving antennas.
The structure of the first determination unit 120 may include a processor having information processing and a storage medium. The storage medium stores the mapping times information and the mapping offset; the processor may read the mapping number information and the mapping offset from the storage medium by executing a designated code. The first determining unit 120 may also include a receiving interface, where the receiving interface may receive the mapping number information and the mapping offset from an external device such as a base station.
The specific structure of the second determining unit 130 may include a processor or a processing chip, and determines which subframes in the PSCCH period are PSCCH subframes according to the subframe configuration bitmap sequence, the mapping frequency information, and the mapping offset.
The D2D UE described in this embodiment may be configured to implement the method for configuring a resource pool described in the foregoing method embodiment, and the resource pool configured by the D2D UE described in this embodiment may allow the sending-end UE to send more than one SCI information in one PSCCH period, which may better utilize resources in the PSCCH period, improve transmission efficiency, and the like.
The second determining unit 120 is specifically configured to perform, starting from the starting subframe of the PSCCH period, the first mapping of the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence. In this embodiment, when performing subframe configuration bitmap sequence mapping, the second determining unit 120 starts from a starting subframe of a PSCCH period, where the starting subframe of the PSCCH period refers to a first subframe of the PSCCH period.
The following are several configurations of the second determining unit 120 performing subframe shifting according to the mapping offset in this embodiment.
The structure I is as follows:
the second determining unit 120 is further specifically configured to perform subframe shifting from the starting subframe mapped by the subframe configuration bitmap sequence at the mth time according to the mapping offset, and determine the starting subframe mapped by the subframe configuration bitmap sequence at the m +1 th time. Wherein, the starting subframe of the m-th mapping of the subframe configuration bitmap sequence is a subframe corresponding to a first indication bit in the subframe configuration bitmap sequence in the m-th mapping of the subframe configuration bitmap sequence.
The structure II is as follows:
the second determining unit 120 is further specifically configured to perform subframe shifting from a first subframe after a last PSCCH subframe determined by the mth subframe configuration bitmap sequence mapping according to the mapping offset, and determine a starting subframe of the m +1 th subframe configuration bitmap sequence mapping;
the structure is three:
the second determining unit 120 is further specifically configured to perform subframe shifting from a first subframe after a cut-off subframe mapped by the mth subframe configuration bitmap sequence according to the mapping offset, and determine a starting subframe mapped by the mth +1 subframe configuration bitmap sequence; wherein m is a positive integer less than the total number of mappings or no greater than the number of repeated mappings. The ending subframe of the m-th subframe configuration bitmap sequence mapping is a subframe corresponding to the last indicator bit in the subframe configuration bitmap sequence in the m-th subframe configuration bitmap sequence mapping;
and side link control information is sent on the PSCCH subframe determined by the mapping of the k-th subframe configuration bitmap sequence, and the range of the PSSCH subframe used for indicating data transmission is from a subframe s to a subframe t.
The meaning here is to be understood as: PSCCH subframes can be used to send side link control information; the side link control information is used for indicating a PSSCH subframe for data transmission; and determining the range of PSSCH subframes which can be indicated by the PSCCH subframe and can be indicated in the kth subframe configuration bitmap sequence mapping from a subframe s to a subframe t.
The subframe s is a first subframe after the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping; or the subframe s is the first subframe which is located in the PSSCH resource pool and is behind the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping;
the subframe t is a subframe before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping;
the subframe t is a last subframe which is located in the PSSCH resource pool and is before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a subframe before a first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSSCH resource pool before the first PSCCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSCCH period or the last subframe in the PSSCH resource pool.
The first determining unit 110 determines the structures of the mapping number information and the mapping offset, which are various, and several alternative structures are provided below.
The first determination unit 110 includes at least one of the following optional structures;
the first determining unit 110 is specifically configured to determine the mapping number information and/or the mapping offset based on preconfigured information.
The first determining unit 110 is specifically configured to determine the mapping number information and/or the mapping offset based on system definition information.
The first determining unit 110 is specifically configured to receive a higher layer signaling and obtain mapping number information and/or the mapping offset from the higher layer signaling.
The first determining unit 110 is specifically configured to determine the mapping frequency information and/or the mapping offset according to attribute information of a PSCCH resource pool; the attribute information of the PSCCH resource pool comprises a periodic packet of the PSCCH resource pool and/or the number of PSCCH subframes contained in the PSCCH resource pool; the PSCCH resource pool is a set of PSCCH subframes;
the first determining unit 110 is specifically configured to determine the mapping frequency information and the mapping offset according to attribute information of a PSSCH resource pool; wherein the attribute information of the PSSCH resource pool comprises the period of the PSSCH resource pool and/or the number of PSCCH subframes in the PSSCH resource pool.
The higher layer signaling comprises system messages; the mapping number information and the mapping offset are used for determining the PSCCH subframe for all D2D UEs in a cell sending the system message or D2D UEs in a designated D2D group. The high layer signaling also comprises a Radio Resource Control (RRC) message; the mapping number information and the mapping offset are carried in a ProseCommConfig information element of the RRC message and/or a configuration information element related to Prose Relay.
In order to resolve the conflict of configuring the same subframe in the PSCCH period as both the PSCCH subframe and the PSCCH subframe, in this embodiment, the D2D UE further includes a third determining unit. The third determining unit is configured to determine that a subframe in the PSCCH resource pool that overlaps with the PSCCH subframe is not used for transmitting data information when the determined PSCCH subframe overlaps with the PSCCH subframe in the PSCCH resource pool.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (14)

1. A resource pool configuration method, the method comprising:
acquiring a subframe configuration bitmap sequence of a physical side link control channel (PSCCH); wherein the subframe configuration bitmap sequence comprises N indicator bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in a PSCCH period is a PSCCH subframe or not; n is a positive integer; n is a positive integer not greater than N;
determining mapping frequency information and mapping offset of the subframe configuration bitmap sequence;
performing subframe configuration bitmap sequence mapping according to the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset to determine a PSCCH subframe in a PSCCH period;
wherein, the mapping times information is total mapping times or repeated mapping times; the total mapping times are used for indicating the total times of mapping the subframe configuration bitmap sequence in the PSCCH period; the repeated mapping times are used for indicating the repeated times of the subframe configuration bitmap sequence mapping in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings;
the determining the PSCCH subframe in the PSCCH period by mapping the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset comprises the following steps:
starting from the initial subframe mapped by the subframe configuration bitmap sequence for the mth time, carrying out subframe offset according to the mapping offset, and determining the initial subframe mapped by the subframe configuration bitmap sequence for the (m + 1) th time; wherein, the starting subframe of the m-th mapping of the subframe configuration bitmap sequence is a subframe corresponding to a first indication bit in the m-th mapping of the subframe configuration bitmap sequence;
or the like, or, alternatively,
starting from the first subframe after the last PSCCH subframe determined by the m-th subframe configuration bitmap sequence mapping, performing subframe offset according to the mapping offset, and determining the starting subframe of the m + 1-th subframe configuration bitmap sequence mapping;
or the like, or, alternatively,
starting from the first subframe after the cut-off subframe mapped by the m-th subframe configuration bitmap sequence, carrying out subframe offset according to the mapping offset, and determining the starting subframe mapped by the m + 1-th subframe configuration bitmap sequence; and the subframe of the m-th subframe configuration bitmap sequence mapping is a subframe corresponding to the last indicator bit in the subframe configuration bitmap sequence in the m-th subframe configuration bitmap sequence mapping.
2. The method of claim 1,
the determining the PSCCH subframe in the PSCCH period by mapping the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence, the mapping frequency information and the mapping offset comprises the following steps:
starting from a starting subframe of the PSCCH period, carrying out first-time mapping on the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence; wherein the starting subframe of the PSCCH period is the first subframe in the PSCCH period.
3. The method of claim 1,
side link control information sent on the PSCCH subframe determined by the mapping of the k-th subframe configuration bitmap sequence, wherein the range of the PSSCH subframe used for indicating data transmission is from a subframe s to a subframe t;
the subframe s is a first subframe after the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping; or the subframe s is the first subframe which is located in the PSCCH resource pool and behind the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping pool;
the subframe t is a subframe before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a last subframe which is located in the PSSCH resource pool and is before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a subframe before a first PSSCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSSCH resource pool before the first PSSCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSCCH period or the last subframe in the PSSCH resource pool;
wherein the PSSCH resource pool comprises at least one PSSCH subframe.
4. The method of claim 1,
the determining of the mapping times information and the mapping offset of the subframe configuration bitmap sequence includes at least one of the following:
determining the mapping number information and/or the mapping offset based on preconfigured information;
determining the mapping times information and/or the mapping offset based on system definition information;
receiving a high-level signaling and acquiring mapping frequency information and/or the mapping offset from the high-level signaling;
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSCCH resource pool; the attribute information of the PSCCH resource pool comprises the period of the PSCCH resource pool and/or the number of PSCCH subframes contained in the PSCCH resource pool;
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSSCH resource pool; the attribute information of the PSSCH resource pool comprises the period of the PSSCH resource pool and/or the number of PSSCH subframes contained in the PSSCH resource pool;
the PSSCH resource pool includes at least one PSSCH subframe.
5. The method of claim 4,
the higher layer signaling comprises system messages;
the mapping number information and/or the mapping offset is used for determining the PSCCH subframe for all device-to-device D2D UEs or D2D UEs within a designated D2D group within the cell transmitting the system message.
6. The method of claim 4,
the higher layer signaling comprises a Radio Resource Control (RRC) message;
the mapping number information and/or the mapping offset are carried in a device-to-device communication configuration information element of the RRC message and/or a configuration information element related to a device-to-device communication relay.
7. The method of claim 1,
the method further comprises the following steps:
and when the determined PSCCH sub-frame is overlapped with a PSSCH sub-frame in the PSSCH resource pool, determining that the sub-frame overlapped with the PSCCH sub-frame in the PSSCH resource pool is not used for sending data information.
8. A D2D UE, wherein the D2D UE comprises:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring a subframe configuration bitmap sequence of a physical side link control channel (PSCCH); wherein the subframe configuration bitmap sequence comprises N indicator bits; the nth indication bit in the N indication bits is used for indicating whether a subframe which has a mapping relation with the nth indication bit in a PSCCH period is a PSCCH subframe or not; n is a positive integer; n is a positive integer not greater than N;
a first determining unit, configured to determine mapping frequency information and mapping offset of the subframe configuration bitmap sequence;
a second determining unit, configured to perform subframe configuration bitmap sequence mapping to determine a PSCCH subframe in a PSCCH period according to the subframe configuration bitmap sequence, the mapping frequency information, and the mapping offset;
wherein, the mapping times information is total mapping times or repeated mapping times; the total mapping times are used for indicating the total times of mapping the subframe configuration bitmap sequence in the PSCCH period; the repeated mapping times are used for indicating the repeated times of the subframe configuration bitmap sequence mapping in the PSCCH period; the mapping offset is a subframe offset between two adjacent subframe configuration bitmap sequence mappings;
the second determining unit is further specifically configured to perform subframe shifting according to the mapping offset from a starting subframe of the mth subframe configuration bitmap sequence mapping, and determine a starting subframe of the m +1 th subframe configuration bitmap sequence mapping; wherein, the starting subframe of the m-th mapping of the subframe configuration bitmap sequence is a subframe corresponding to a first indication bit in the m-th mapping of the subframe configuration bitmap sequence;
or the like, or, alternatively,
starting from the first subframe after the last PSCCH subframe determined by the m-th subframe configuration bitmap sequence mapping, performing subframe offset according to the mapping offset, and determining the starting subframe of the m + 1-th subframe configuration bitmap sequence mapping;
or the like, or, alternatively,
starting from the first subframe after the cut-off subframe mapped by the m-th subframe configuration bitmap sequence, carrying out subframe offset according to the mapping offset, and determining the starting subframe mapped by the m + 1-th subframe configuration bitmap sequence; and the subframe of the m-th subframe configuration bitmap sequence mapping is a subframe corresponding to the last indicator bit in the subframe configuration bitmap sequence in the m-th subframe configuration bitmap sequence mapping.
9. The D2D UE of claim 8,
the second determining unit is specifically configured to perform, starting from a starting subframe of the PSCCH period, the first mapping of the subframe configuration bitmap sequence according to the subframe configuration bitmap sequence; wherein the starting subframe of the PSCCH period is the first subframe in the PSCCH period.
10. The D2D UE of claim 8,
side link control information sent on the PSCCH subframe determined by the mapping of the k-th subframe configuration bitmap sequence, wherein the range of the PSSCH subframe used for indicating data transmission is from a subframe s to a subframe t;
the subframe s is a first subframe after the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping; or the subframe s is the first subframe which is located in the PSCCH resource pool and behind the last PSCCH subframe in the kth subframe configuration bitmap sequence mapping pool;
the subframe t is a subframe before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a last subframe which is located in the PSSCH resource pool and is before a starting subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is a subframe before a first PSSCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSSCH resource pool before the first PSSCH subframe in the (k + 1) th subframe configuration bitmap sequence mapping; or
The subframe t is the last subframe in the PSCCH period or the last subframe in the PSSCH resource pool;
wherein the PSSCH resource pool comprises at least one PSSCH subframe.
11. The D2D UE of claim 8,
the first determining unit is specifically configured to determine the mapping number information and/or the mapping offset based on preconfigured information;
determining the mapping times information and/or the mapping offset based on system definition information;
receiving a high-level signaling and acquiring mapping frequency information and/or the mapping offset from the high-level signaling;
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSCCH resource pool; the attribute information of the PSCCH resource pool comprises the period of the PSCCH resource pool and/or the number of PSCCH subframes contained in the PSCCH resource pool;
determining the mapping frequency information and/or the mapping offset according to the attribute information of the PSSCH resource pool; the attribute information of the PSSCH resource pool comprises the period of the PSSCH resource pool and/or the number of PSSCH subframes contained in the PSSCH resource pool;
the PSSCH resource pool includes at least one PSSCH subframe.
12. The D2D UE of claim 11,
the higher layer signaling comprises system messages;
the mapping number information and/or the mapping offset is used for determining the PSCCH subframe for all device-to-device D2D UEs or D2D UEs within a designated D2D group within the cell transmitting the system message.
13. The D2D UE of claim 11,
the higher layer signaling comprises a Radio Resource Control (RRC) message;
the mapping number information and/or the mapping offset are carried in a device-to-device communication configuration information element of the RRC message and/or a configuration information element related to a device-to-device communication relay.
14. The D2D UE of claim 8,
the D2D UE further includes:
a third determining unit, configured to determine that a subframe in the PSCCH resource pool that overlaps with the PSCCH subframe is not used for transmitting data information when the determined PSCCH subframe overlaps with the PSCCH subframe in the PSCCH resource pool.
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