APPARATUS AND METHOD IN WI1ZELESS COMMUNTGATTON SYSTEM HELD [OOOl] The present disclosure relatcs to the technical field of wireless communication, and 5 in particular to an apparatus and a method for impleme~~tilflrge quency hopping in device to device (D2D) communication in a wireless communication system. BACKGROUND 10002) Outbreak increasing of user data raises a higher requirement for dala transmission 10 rate and transmission efficiency. As communication load between a user and a base station increases continuously, direct communication performed between adjacent devices without relay of the base station may not only reduce loads of the base station, but also facilitate reducing interference on communication of other devices since a short communication distance may result in a better signal and thus transmission power between the devices may be IS low. D2D communication technology is developed based on such a background. [0003] However, the D2D communication changes the conventional user-base station communication mode, a part of functions of the base station are transplanted onto a user equipment, and hence designs for a physical layer, a MAC layer or a high layer protocol are challenges. In an LTE-A standard established by a 3GPP organization, D2D communication 20 protocols have been discussed widely. Presently, a principal solution is to make no feedbacks for information transnlitted by a counterpart user equipment between user equiplnents performing D2D communication, i.e., the conventional HARQ feedback mechanism in user-base station communication is not used. In this case, how to ensure each of the user equipments participating in D2D communication can still efficiently transmit and receive 25 accurate and integrated D2D information has become a hot issue. In the present disclosure, for the above challenge caused due to introduction of the D2D technology, a transmission scheme suitable for the D2D communication is designed lo ensure information transmission performance of D2D. 30 SUMMARY Soiiy China ReI:CNPA l40071N00 Sony KcS.: SP3627151N00 OLII.R el:: OP16 15-06-0322 Original [0004] A brief summary of the disclosure will be given below to provide basic understanding of some aspects of the disclosure. Howevel; it shall be appreciated that this summary is neither exhaustively descriptive of the disclosure nor intended to define essential or important components or the score or the disclosure but is merely for the privpose of 5 presenting sonle concepts of the disclosure in a simplified form and hereby acts as a preamble of more detailed descriptions which will he presented later. [0005] In view of the above issuc, an object of the present disclosure is to provide an apparatus and a method for a wireless communication system, which can achieve accurate and integrated information transmission in D2D communication. In addition, in the present 10 disclosure, a resource scheduling scheme for D2D communication on a base station side or a user equipment side is put forward to support efficient information transmission of D2D. Furthermore, the present disclosure further proposes to use retransmission frequency hopping technology in a D2D communication process and provides a frequency hopping design scheme, thereby improving comn~unication efficiency and information transmission 15 performance. [0006] According to an aspect of the present disclosure, an apparatus in a wireless communication system is provided, and the apparatus includes: a configuration information generating unit configured to generate configuration information for a user equipment performing device to device communication, the configuration information comprising 20 retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a transmitting unit configured to transmit the generated configuration information to the user equipment performing device to device communication. 25 [0007] According to another aspect of the present disclosure, an appasatus in a wireless communication system is further provided, and the apparatus includes: a signal transceiving unit configurcd to receive configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal transmission betwcen user 30 equipments performing device to devicc communication; aud a controlling unit configured to control, according to the received retransmission number relevant inSolmation, the signal Sony China Ref.:ChPA140071N00 So~ry Rel:: SI'3627151N00 Our Rel:: OP1615-06.0322 Original transceiving unit to repeatedly transmit a signal to a counterpart user equipment [0008] According to another aspect of thc prcsent disclosure, an apparatus in a wircless conlmunication system is further provided, and the apparatus includes: a signal transceiving unit configured to receive configuration information comprising retransn~ission number 5 relevant information, wherein the retransmission number relevant information indicates infoimation relevant to the number of retransmissions of signal transmission between user equipmcnts performing device to device communication; and a controlling unit configured to control, according to the received retransmission number relevant information, the signal transceiving unit to receive all signals transmitted from a counterpart user equipment. 10 [0009] According to another aspect of the present disclosure, a niethod in a wireless communication system is further provided, and the method includes: a configuration information generating step of generating configuration information for a user equipment performing device to device communication, the configuration information comprising retransmission number relevant information, wherein the retransmission number relevant I5 information indicates information relevant to the number of retransmissions of signal transmission between user equipmcnts performing device to device communication; and a transmitting step of transmitting the generated configuration information to the user equipment performing device to device communication. [0010] According to another aspect of the present disclosure, a method in a wireless 20 communication system is further provided, and the method includes: a signal transceiving step of receiving configuration infonnation comprising retransmission number relevant information, wherein the retransmission number relevant infonnation indicates information relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a controlling step of controlling, according 25 to the received retransmission number relevant information, to repeatedly transmit a signal to a counterpart user equipment in the signal transceiving step [0011] According to another aspect of the present disclosure, a method in a wireless communication system is further provided, and the method includes: a signal transceiving step of receiving configuration information comprising retransmission numbei rclevant 30 information, wherein thc retrailslnission number relevant information indicates information relevant to thc number of retransmissions of signal transmission between user equipments Sally Clrina Rcf.:C1\I1~Al40071N00 Sony Ref: SP36271 ilN00 0111. ReE: OPl615-06-0322 Original performing dcvice to devicc communication, and a controlling step of controlling, according to the received rctransrnission number relevant information, to receive all signals transmitted from a counterpart user equipment in the signal transceiving step. [0012] According to anothcr aspect of the present disclosure, a storage medium is further 5 provided, and the storage medium includes machine readable program codes which, when executed on an information processing device, cause the information processing device to perform a method including: a configuration information generating step of generating configuration information for a user equipment performing dcvice to device communication, the configuration information comprising retransmission number relevant information, 10 wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal transnlission between user equipments performing device to device communication; and a transmitting step of transmitting the generated configuration information to the user equipment performing device to device communication. [0013] According to another aspect or the present disclosure, a storage medium is further 15 provided, and the storage medium includes machine readable progranl codes which, when executed on an information processing device, cause the information processing device to perform a method including: a signal transceiving step of receiving configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal 20 transmission between usrr equipments performing device to device conim~rnication; and a controlling step of controlling, according to the received retransmission number relevant information, to repeatedly transmit a signal to a counterpart user equipment in the signal transceiving step. [0014] According to another aspect of the present disclosure, a storage medium is further 25 provided, and the storage medium includes machine readable program codes which, when executed on an information processing device, cause the information processing device to perform a method including: a signal transceiving step of receiving configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal 30 transmission 'uctween user equipmeuts performing device 'to devicc communication; and a controlling step of controlling, according to the received ~etransmlssion number relevant Son), China Kcf:CNPA140071N0@ Soiiy Rel:: SP3627 ISIN00 Our Re[: OP16 15-06-0322 Original information, to receive all signals transmitted from a counterpart user cqnipment in the signal transceiving step. [0015] According to another aspect of the present disclosure, a program product is further provided, and the program product includes machine executable instructions which, when 5 executed on an information processing device, cause the information processing device to perform a method including: a configuration information generating step of generating configuration information for a user equipment performing device to device communication, the configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the I 0 number of retransmissions of signal transmission between user equipments perlbrming device to device communication; and a transmitting step of transmitting the generated configuration information to the user equipment performing device to device communication. [0016] According to another aspect of the present disclosure, a program product is further provided, and the program product includes machine executable instructions which, when 1s executed on an information processing device, cause the information processing device to perform a method including: a signal transceiving step of receiving configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a 20 controlling step of controlling, according to the received retransmission nu~nber relevant information, to repeatedly transmit a signal to a counterpart user equipment in the signal transceiving step [0017] According to another aspect of the present disclosure, a program product is further provided, and the program product includes machine executable instructions which, when 25 executed on an information processing device, cause the information processing device to perform a method including: a signal transceiving step of receiving configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates idormation relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a 30 controlling step of controlling, according lo the received retransmission number relevant information, to receive all signals transmitted from a counterpart user equipment in the signal Sally Cliirra ReE:C'NPA140071N00 Sony Rcf: SP3627 151N00 Our Kcf: 0P1615-06-0322 01-iginal transceiving slep (00181 According to another aspect of the present disclosurc, an electronic device is furthcr provided. 'The electronic device is located rn a wireless colnrnunicat~ons ystem and includes a circuit configured to perform a method lncluding: a configuration information generating step 5 of generating configuration information for a user equipment perfomng device to device communication, the configuration information comprising retransmission number rclevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a transmitting step of transmitting the 10 generated configuration information to the user equipment performing device to device communication. [0019] According to another aspect of the present disclosure, an electronic device is further provided. The electronic device is located in a wireless communication system and includes a circuit configured to perform a method including: a signal transceiving step of receiving 15 configuration information comprising retransmission number relevant information, wherein the retransmission number relevant information indicates information relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a controlling step of controlling, according to the received retransmission number relevant information, to repeatedly transmit a signal to a counterpart 20 user equipment in the signal transceiving step. 100201 According to another aspect of the present disclosure, an electronic device is further provided. The electronic device is located in a wireless communication system and includes a circuit configured to perform a method including: a signal transceiving step of receiving configuration information comprising retransmission number relevant information, wherein 25 the retransmission number relevant information indicates infol.mation relevant to the number of retransmissions of signal transmission between user equipments performing device to device communication; and a controlling step of controlhng, according to the received retransmission number relevant information, to receive all signals transmitted from a counterpart user equipment in the signal transceiving step. 30 [0021] Othel aspects of the embodiments of the disclosurc will be presented in the following dctailed description serving to fully disclose preferred embodiments of the Sony China Ref:CNPA 14007iN00 Sony Kel:: S1'3627 15iN00 Our ReS.: OF161 5-06-0322 Origi~iai disclosure but not to limit the disclosurc BRIEF DESCRIPTION OF THE DRAWINGS [0022] The disclosure can be better understood with reference to the detailed description 5 given below in conjunction with the accompanying drawings, throughout which identical or like reference signs denote identical or like components. The accompanying drawings together with the lollowing detailed description are incorporated into and form a part of the specification and serve to further illustrate the preferred embodiments of the disclosure and to explain the principle and advantages of the disclosure by way of example. In the drawings: 10 [0023] Figure 1 is a block diagram illustrating an example of function configuration of an apparatus in a wireless communication system according to an embodiment of the present disclosure; 10024) Figure 2 is a schematic diagram illustrating distribution of data signal transmission resources in a communication mode of model according to a first embodiment of the present 15 disclosure; [0025] Figure 3 is another schematic diagram illustrating distribution of data signal transmission resources in the communication mode of model according to the first embodiment of the present disclosure; [0026] Figure 4 is a block diagram illustrating an example of function configuration of an 20 apparatus on a base station side/cluster head side in the communication mode of model according to the first embodiment of the present disclosure; [0027] Figure 5 is a block diagram illustrating an example of function configuration of an apparatus on a transmitting user equipment side in the communication mode of model according to the first embodiment of the present disclosure; 25 [0028] Figure 6 is a block diagram illustrating another example of function configuration of the apparatus on the transmitting user equipment side in the communication mode of model according to the first embodiment of the present disclosure; [0029] Figure 7 is a block diagram illustrating another example of function configuration of the apparatus on the transmitting user equipment side in the coinmunication mode of model So~iy China Rer.:CNPA14007iN00 Sonp ReE: SP36271 SIN00 Our Ref: OP 161 5-06-0322 Original according to the first embodiment of tlic prescnt disclosure; [0030] Figure 8 is a block diagram illustrating an example of function configuration of an apparatus on a receiving user equipment side in the communication mode of model according to the first embodiment of the present disclosure; 5 [0031] Figure 9 is a block diagram illustrating an example of function configuration of an apparatus on a base station sideicluster head side in a communication mode of mode2 according to the first embodiment of the present disclosure; [0032] Figure 10 is a block diagram illustrating an example of function configuration of an apparatus on a transmitting user equipment side in the communication mode of mode2 10 according to the first embodiment of the present disclosure; [0033] Figure 11 is a block diagram illustrating another example of function configuration of the apparatus on the transmitting user equipment side in the communication mode of mode2 according to the first embodiment of the present disclosure; (00341 Figure 12 is a block diagram illustrating another example of function configuration 15 of the apparatus on the transmitting user equipment side in the comn~unication mode of mode2 according to the first embodiment of the present disclosure; 100351 Figure 13 is a block diagram illustrating an example of function configuration of an apparatus on a receiving user equipment side in the communication mode of mode2 according to the first embodiment ofthe present disclosure; 20 100361 Figure 14 is a schematic diagram illustrating distribution of time-frequency resources for a discovery signal in a Typel discovery mechanism accordillg to a third embodiment of the present disclosure; [0037] Figure 15 is a block diagram illustrating an example of function configuration of an apparatus on a base station sideicluster head side in the Typel discovery mechanism 25 according to the third embodiment of the present disclosure; 100381 Figure 16 is a block diagram illustrating an example of function configuration of an apparatus on a transmitting user equipment side in the Typel discovery mechanism according to the third embodiment of the present disclosure; 100391 Figure 17 is a block diagram illustrating an example of function configuration of an Soiiy Cliina Ref.:C'hPAi400711\100 Soi~y Kel:: SP36271ilN00 Our Rel:: OP1615-06-0322 Original apparatus on a receiving uses equipment side in the Type1 discovery mechanism according to the third embodiment orthe prcsent disclosure; [00401 Figure 18 is a block diagram illustrating an example of function conliguration of an apparatus on a basc station sidc/cluster head side in a Type2B discovcry mechanism acco~ding 5 to the third embodiment of the present disclosure; [0041] Figure 19 is a flowchart illustrating an exemplary process of a method in a wireless communication system according to an embodiment of the prescnt disclosure; (00421 Figure 20 is a flowchart illustrating an exemplary process of a method in a wireless communication system according to another embodiment of the present disclos~~re; lo 100431 Figure 21 is a flowchart illustrating an exemplary process of a method in a wireless con~munications ystem accordi~~tog a nother embodiment of the present disclosure; 100441 Figure 22 is a block diagram of an exemplary structure of a personal computer as an available information processing device according to an embodiment of the present disclosure; 15 100451 Figure 23 is a block diagram illustrating a first example of schematic configuration of an evolved node B (eNB) to which the technology of the present disclosure may be applied; [0046] Figure 24 is a block diagram illustrating a second example of schematic configuration of the eNB Lo which the technology of the present disclosure may be applied; 20 100471 Figure 25 is a block diagram illustrating an example of schematic configuration of a smartphone to which the technology of the present disclosure may be applied; and 100481 Figure 26 is a block diagram illustrating an example of schematic configuration of a car navigation apparatus to which the technology of the present disclosure may be applied. 25 DETAILED DESCIUPTION OF THE EMBODIMENTS [0049] ~xern~la&em bodiments of the prescnt disclosure will be &scribed below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all the features of practical implementatio~lsa re described in the specification. I-Iowever, it is to be appreciated that numerous irnpleme~~lation-specifidce cisions shall be made during - 9 - Sony China ReT:CNPA 140071N00 Sony Rcf.: SP36271 SIN00 Our KeT: OPI615-06-0322 Original developing any of such practical in~plcmentations so as to achieve the developer's spccific goals, for exanlple, to coinply with systcm- and business-related constraining conditions which will vary from one implementation to another. Moreover, it shall also be appreciated that such a development effort might be very complex and time-consuming but may simply be 5 ' a routine task for those skilled in the art benefiting from this disclosure. [0050] It shall further be noted that only those device structures andlor process steps closely relevant to the solutions of the disclosure are illustrated in the drawings while other details less relevant to the disclosure are omitted so as not to obscure thc disclosure due to those unnecessary details. 10 [0051] According to progress of standardization of LTE-A, presently it is defined that a D2D discovery mechanism may include Typel, Type2A and Type2B, and a D2D communication mechanism may include Model and Mode2. Different D2D mechanisms relate to different resource allocation manners, thereby influencing signaling design in the D2D communication and resource scheduling and parameter configuration in specific 15 transmission. [0052] Hereinafter, embodiments of the present disclosure will be described for each type of D2D communication/ discovery mechanism in the following order. [0053] 1. First embodiment (scheme design for data signal transmission in a single-cell scene in D2D coinmunication) 20 1 - 1. scheme design in communication mode of model 1-1-1. examples of configurations on a base station sidelcluster head side in the communication mode of model 1-1-2. examples of configurations on a transmitting user equipment side in the communication mode of model 1-1-3. examples of configurations on a receiving user equipment side in the communication mode ol model 1-2. scheme design in con~municationm ode of mode2 1-2-1. examples of ~ o ~ g u r a t i oonns a base station sidelcluster head side in the communication mode of mode2 - 10- Sony China Kef:CNPA140071N00 Sony Kel:: SP3627151N00 Oiir Rel'.: 0P1615-06-0322 Original 1-2-2. examplcs of configurations on a transmitting user equipment side in thc communication mode of mode2 1-2-3. examplcs of configurations on a rcceiving user equipment side in the communication mode of mode2 5 2. Second embodiment (scheme design for data signal transmission in a multi-cell scene in D2D communication) 2-1. scheme design in a communication mode of model 2-2. scheme design in a communication mode of mode2 3. Third embodiment (scheme design for discovery signal transmission in a I o single-cell scene in D2D communication) 3-1. scheme design in a Type1 discovery mechatiis~n 3-1-1. examples of configurations on a base station sideicluster head side in the Type 1 discovery mechanism 3-1-2. examples of configurations on a transmitting user equipment side in the Type 1 discovery mechanism 3-1-3. examples of configurations on a receiving user equipment side in the Type1 discovery mechanism 3-2. scheinc design in a Type2 (including Type2A and Type2B) discovery mechanism 3-2-1. examples of configurations on a base station sideicluster head side in the Type2B discovery mechanism 3-2-2. examples of configurations on a user equipment side in the Type2B discovery mechanism 4. Fourth embodiment (scheduling assignment information transmission in D2D 25 communication) 5. Application examples 5-1. application examples for a base station 5-2. application examples for a user equipment - 1 1 - Sony Cl~iila Ref.:CNPA 140071N00 Soily Ref.: SP3627 151N00 Our Ref: OP1615-06-0322 Original [0054] Firstly, a block diagram of an example of function configuration oS an apparatus in a wireless co~nnlunication systcm according to an embodiment of the present disclosure is described by referring to Figurc 1. Figure 1 is a block diagram illustrating an cxample of function configuration of an apparatus in a wireless communication system according to an 5 embodiment of the present disclosure. [0055] As shown in Figure I, an apparatus 100 may include a configuration information generating unit 102 and a transmitting unit 104. [0056] The configuration information generating unit 102 may be configured to generate configuration information for a user equipment performing D2D communication including 10 retransmission number relevant information, and the retransmission number relevant information indicates information relevant to the nunlber of retransmissions of signal transmission between user equipments performing D2D communication. [0057] As described above, an HARQ feedback mechanism is absent in D2D communication. In the present disclosure, it is designed to adopt a certain amount of I 5 retransmissions in D2D communication to ensure reception accuracy of signal transmissions. In an example, the number of retransmissions is set based on the reception accuracy for a D2D signal and a resource utilization rate. In a scene of a low signal reception accuracy (which may be caused due to great network interference or high mobility of a terminal and so on), the number of retransmissions is set as a great value. Specifically, thc signal reception 20 accuracy may be determirled by collecting measurement reports for a channel quality from a user equipment in a network, for example. In a scene where resources are in short supply (for example the number of user equipments performing D2D communication is great1 tlie user equipments are distributed in a centralized manner), the number of retransmissions may be set as a small value to reduce resources used in transmitting the same signal. 25 (00581 The transmitting unit 104 may be configured to transmit the generated configuration information to the user equipment performing device to device communication. [0059] It should be noted that, the configuration information generating unit 102 here may be arranged on a base station side, a D2D cluster head side for example in D2D communication, or a user equipment side transmitting a D2D signal. In a case that the 30 configuration information generating unit 102 is arranged on the user equipment side, each of the user equipments may set the retransmission number relevant information according to a - 12 - Sony China l [0062] [I-1. scheme design in a communication mode of model] I00631 Hereinafter scheme design for data signal transmission in the communication mode of mode1 in a single-cell scene in D2D communication according to a first embodiment of the present disclosure will be described by referring to Figure 2 to Figure 8. In the 15 communication mode of model in D2D communication, communication resources are allocated in a centralized manner for example: by a centralized apparatus (for example a base station, a baseband cloud or a cluster head). [0064] As described above, in the present disclosure, it is designed that a certain amount of retransmissions are adopted in D2D communication to improve reception accuracy. Based on 20 this, the inventor of the present disclosure further sets forth that a transmission resource for example frequency resource different from that for last transmission is adopted during each retransnlission to sufficiently utilize frequency diversity gains, thereby further improving the reception accuracy for information in D2D communication as a whole. In the present disclosure, a resource mapping mechanism in which a transmission resource different from 25 that for last transniission is adopted during each retransmission mentioned above is sinlply referred to as frequency hopping sometimes. (00651 It should be noted that in the prior art, the base station performs resource scheduling successively for uplink transmission requests of user equipments, and each time the base station allocates the uplink resources to the user equipment, it indicates the user equipment of 30 available uplink resources for current transmission in a form of virtual resource block (VRB). Sony China Rel::CNPAI40071N00 So~iy Ref.: SI'lh27 151N00 Our Ref: OP 161 5-06-0322 Origilial 'The user equipment determines an available physical resource block (PliB) according to the VRB, that is, maps the VRB to the PRR, and then utilizes the PRB to perform actual uplink transmission. Particularly, based on an indication for example a frcquency hopping flag of the base station, the PRBs may directly correspond to the VRBs one by one, or the VRBs are 5 interlaced firstly and then mapped onto PliBs having discontinuous resources according to a certain rule. For the latter case, it is also considered that the frequency hopping technology is applied to the mapping process from VRBs to the PRBs, and specific ways thereof may bc referred to descriptions in the 3GPP LTE-A standard, and no repetitions will be made herein. Hence, in some examples of the present disclosure, there are two times of frequency hopping: 10 conventional frequency hopping from the VRBs obtained f?om the centralized device allocating resources to the PRBs (for the iransmission resources at a same time), and frequency hopping from a last transmission resource to a next transmission resource (which may be frequency hopping from the PRBs to the PRBs). The frequency hopping scheme design disclosed in the following are mainly directed to mapping from a last transmission 15 resource to a next transmission resource, for example mapping from a first transmission resource to a first retransmission resource, and mapping from the first retransmission resource to a second retransmission resource and so on. [0066] Preferred examples of frequency hopping scheme design in a case of model are provided hereinafter. However, it should he understood that the preferred examples are only 20 illustrative and are not intended to be restrictive, and other schemes may he conceived by those skilled in the art according to the principles orthe frequency hopping scheme design of the present disclosure. [0067] Scheme 1: it is required that resources for data signal transmission in D2D communication are distributed at edges of the whole uplink bandwidth resources and close to 25 a physical uplink control channel (PUCCI3), and a frequency span between adjacent transmission resources is great as much as possible. LO0681 Figure 2 illustrates a schematic diagram of distribution of data signal transmission resources according to the scheme 1. As shown in Figure 2, frequency resources for D2D communication are close to the PUCCH and adjaceilt transmission resources are distributed 30 according to a piinciple of up-down frccjuency hopping, such that a frequency span between transmission resources for two adjacent transmissions is maximized. In the present disclosule, Sony China Ref:CNPA14007!N00 Sony Ref,: SP3627151N00 Out. Kel:: OP1615-06-0322 Origina! it is designed that frequency resources for D2D colnn~unicationa re close to the PUCCIl as much as possible, such that continuous PUSCH resources are reserved to facilitate allocdting resources to a conventional user equipment communicating with the base station, in addition to maximizing the frequency span. In addition, in the example shown ill Figure 2, a gap X between the frequency resources for D2D communication and the PUCCH is a protection gap arranged to prevent interference on the PUCCH. The gap may be for example set as 1 in a unified manner, or the gap may be set according a distance to the base station or the cluster head. For example, if the base station or the cluster head is nearby, the gap may be set as a greater value; otherwise, the gap may be set as a less value or zero. 10069) Hereinafter an example of an algorithm for determining data transmission resources in the scheme 1 is described. It is assumed that an index of the frequcncy resowce occupied by first transmitted data is f, and the index corresponds to a serial number of a resource block (RB). Firstly, the index is mapped into a D2D data area close to the PUCCH in the uplink transmission bandwidth, and is indicated by f(0). i- (0) = .'at', )j N: -1- (~KBPUCCH +n)-[f/(~i; / N ~ otherwise N k'" [0070] nRspuccn indicates the number of resource blocks occupied by the PUCCH, &!,~IA indicates the number of resource blocks of a whole uplink resource, N~~ indicates the number of resource blocks of all uplink resources for D2D data communication, 11 indicates an rounding operation, and x indicates a protection gap which may be an empiric value or a predetermined value. [0071] Indexes of frequency resources of subsequent retransmission resources are indicated by f(k), l={1,2, . . ., K-1), and K indicates the number of retransmissions. [0072] Schemc 2: it is required that a frequency span between adjacent t~znsmission resources is great as much as possible, and all the transmission resources are distributed as randomly as possible, so as to ensure flexibility in configuration of the frequency hopping. - 15 - Sony China T [00119] Next, an examplc of function configuration of an apparatus on a receiving user equipment side in the communication mode of model according to the first embodiment of the present disclosure is described by referring to Figure 8. Figure 8 is a block diagram illustrating an examplc of fmction configuiation of an apparatus on a receiving user equipment side in the communication mode of model according to the first embodiment of the present disclosure. [00120] As shown in Figure 8, an apparatus 800 may include a retransmission number information receiving nnit 802, a scheduling assignment information receiving unit 804, a tiansmissiou resource determining unit 806, a data signal receiving unit 808 and a data signal Sony China 1IeT:CNPA 140071N00 Sony Rcf.: SP362715lN00 OUI- Ref: OP 161 5-06-0322 Original decoding unit 8 10. [001211 The retransniission number information receiving unit 802 nay be configured to receive retransmission nu~nbcrin formation indicating the number of retransmissions between user equipments performiilg D2D communicatioii. 5 [00122] Thc scheduling assignment information receiving unit 804 may be configurcd to receive scheduling assignment information from a counterpart user equipment. The scl~eduling assignment information includes at lcast a first transmissiou resource indication indicating first transmission resource for first transmission of a data signal in D2D communication. In addition, preferably, the scheduling assignment inihrmation may further 10 include a retransmission resource indication indicating retransmission resources for data signal retransmission in D2D communication, a frequency hopping indication flag indicating whether to apply the frequency hopping technology to retransmission andlor a frequency hopping parameter in a predetermined hopping [unction. [00123] The transmission resource determining unit 806 may be configured to determine the 15 first transmission resource and the retransmission resources based on at least the received scheduling assignment information. In addition, the transmission resource detem~iningu nit 806 may further determine the retransmission resources based on the predetermined hopping function. [00124] The data signal receiving unit 808 may be configured to receive all data signals from 20 the counterpart user equipment according to the received retransmission numbcr information, the determined first transmission resource and retransmission resources. [00125] The data signal decoding unit 810 may be configured to jointly decode all the received data signals to acquire data from the counterpart user equipment. It should be understood that as described above, each of the retransmission number information 25 receiving unit 802, the scheduling assignment information receiving unit 804 and the data signal receiving unit 808 herein may be implemented by a signal transceiving unit for example, and the transmission resource determining unit 806 and the data signal decoding unit 810 may be implemented by a control unit for example. The signal transceiving unit and the control unit may be specifically implemented by elements such as a radio communication 30 interface and a processor and so on in a tenninal product. Sony Chiria ReT:CNPA 1400711\100 Soii), Ref: SP3627 1 SIN00 OLII. Kcf.: OP161 5-06-0322 Original [001261 [I -2. scheme design in a coin~nunicationm ode of mode21 [00127] Hereinafter scheme design of data signal transmission in the communication modc of mode2 in a singlc-cell scene in D2D communication according lo the first embodiment of the prcsent disclosure is described by referring to Figure 9 to Figure 13 5 [00128] In the communication mode of mode2 in D2D communication, a user equipment independently selects resources for communication from a resource pool. Design examples of the frequency hopping scheme in this case are described in the following. I-Iowever, it should be understood that these examples are only illustrative and are not intended to be restrictive, and those skilled in the arl can conceive of other schemes according to the design principle of i o the frequency hopping scheme [00129] In this scheme, first transmission resource for first transmission of a data signal may be randomly selected from a data transmission resource pool for data transmission in D2D communication, and corresponds to an index of a certain resource block in the data transmission resource pool. Subsequent K retransmissions may occupy K continuous resource 15 blocks within the resource pool, and whereby a receiving user equipment does not need to listen to the whole frequency band, thereby improving listening efficiency of the user equipment. In addition, a resource block occupied by each retransmission is at least different from (preferably, not adjacent to) a resource block occupied by a last retransmission, thereby obtaining a certain degree of frequency diversity gain. Specific resource block occupied by 20 each retransmission may bc determined by at least one of the following methocis for example. [00130] Method 1: an n*m (1122) matrix is formed by K numbers, and the matrix is filled with the K numbers in rows. Then, numbers read from the matrix in columns correspond to index numbers of resource blocks occupied by respective retransmissions respectively. In this case, resource blocks occupied by each retransmission and a last transmission are not 25 continuous. [00131] Method 2: an index number of a resource block occupied by k-th retransmission is represented as I(k)=(a*l+b) mod K, where k =I, 2, . . ., K. I [00132] Method 3: a number is randomly selccted from 1 to K sequentially as an index number of a resource block occupied by k-th retransmission 30 1001331 It should be understood that the above frequency hopping scheme design is only Sony China Re1::CNPA I40071NOO So~ry Ref: 51'36271 SIN00 Our I